Department of Food and Nutrition, Kyungnam College of Information and Technology, Busan 617-701, ... more Department of Food and Nutrition, Kyungnam College of Information and Technology, Busan 617-701, KoreaReceived June 27, 2013, Accepted August 9, 2013Key Words : Coordination polymer, Silver complex, Unsymmetrical ligand, Dipyridyl ligand, Crystal struc-tureDuring last two decades, silver coordination polymersbased on dipyridyl type ligands have attracted particularinterest because of the various intriguing architecturescaused by a variety of coordination geometry of Ag(I) ion aswell as their potential applications as functional materials.
E-mail: kmpark@gnu.ac.krReceived September 17, 2012, Accepted October 2, 2012Key Words : Tetraaza... more E-mail: kmpark@gnu.ac.krReceived September 17, 2012, Accepted October 2, 2012Key Words : Tetraazadiphnolic macrocycle, Dinuclear complex, Macrocyclic cupper(II) complex, CrystalstructureOver the years the design and construction of compart-ment ligands has become a fascinating investigation field ofcoordination chemistry since metal complexes of theseligands have been used for the generation of compoundswith specific spectroscopic and magnetic properties and thusof interesting potential applications.
Acta Crystallographica Section E Crystallographic Communications
In the title compound, C24H22N4O4, the four pyridine rings are tilted slightly with respect to ea... more In the title compound, C24H22N4O4, the four pyridine rings are tilted slightly with respect to each other. The dihedral angles between the inner and outer pyridine rings are 12.51 (8) and 9.67 (9)°, while that between inner pyridine rings is 20.10 (7)°. Within the molecule, intramolecular C—H...O and C—H...N contacts are observed. In the crystal, adjacent molecules are linked by π–π stacking interactions between pyridine rings and weak C—H...π interactions between a methyl H atom and the centroid of a pyridine ring, forming a two-dimensional layer structure extending parallel to the ac plane. Hirshfeld surface analysis and two-dimensional fingerprint plots indicate that the most important contributions to the crystal packing are from H...H (52.9%) and H...C/C...H (17.3%) contacts.
Acta Crystallographica Section E Crystallographic Communications
The title compound, C12H6N4, crystallizes with four independent molecules (A, B, C and D) in the ... more The title compound, C12H6N4, crystallizes with four independent molecules (A, B, C and D) in the asymmetric unit. The dihedral angles between the two pyridine rings in each molecule are 25.25 (8)° in A, 5.51 (9)° in B, 11.11 (9)° in C and 16.24 (8)° in D. In the crystal, molecules A and B are linked by C—H...N hydrogen bonds to form layers extending parallel to the ab plane, while molecules C and D are linked by C—H...N hydrogen bonds forming –C–D–C–D– chains propagating along the b-axis direction. The layers and the chains are stacked alternately along the c axis through offset π–π and C[triple-bond]N...π [N-to-pyridine-centroid distance = 3.882 (2) Å] interactions, resulting in the formation of a supramolecular framework.
Acta crystallographica. Section E, Crystallographic communications, 2017
The asymmetric unit of the title compound, [Co(NO3)2(C12H12N2S)2] n , contains a bis-(pyridin-3-y... more The asymmetric unit of the title compound, [Co(NO3)2(C12H12N2S)2] n , contains a bis-(pyridin-3-ylmeth-yl)sulfane (L) ligand, an NO3- anion and half a CoII cation, which lies on an inversion centre. The CoII cation is six-coordinated, being bound to four pyridine N atoms from four symmetry-related L ligands. The remaining coordination sites are occupied by two O atoms from two symmetry-related nitrate anions in a monodentate manner. Thus, the CoII centre adopts a distorted octa-hedral geometry. Two symmetry-related L ligands are connected by two symmetry-related CoII cations, forming a 20-membered cyclic dimer, in which the CoII atoms are separated by 10.2922 (7) Å. The cyclic dimers are connected to each other by sharing CoII atoms, giving rise to the formation of an infinite looped chain propagating along the [101] direction. Inter-molecular C-H⋯π (H⋯ring centroid = 2.89 Å) inter-actions between one pair of corresponding L ligands and C-H⋯O hydrogen bonds between the L ligands and...
Acta crystallographica. Section E, Crystallographic communications, 2017
Reaction of bis-(pyridin-3-ylmeth-yl)sulfane (L) with cobalt(II) chloride in methanol led to the ... more Reaction of bis-(pyridin-3-ylmeth-yl)sulfane (L) with cobalt(II) chloride in methanol led to the formation of the title coordination polymer, [CoCl2(C12H12N2S)(CH3OH)2] n , in which the CoII cation lies on a crystallographic inversion centre and the S atom of the L ligand lies on a twofold rotation axis. Each CoII ion is coordinated by two pyridine N atoms from two bridging L ligands, two O atoms from methanol mol-ecules and two chloride anions, all inversion-related. The complex unit has an elongated octa-hedral geometry, in which N2O2 donor atoms occupy the equatorial positions and two chloride anions occupy the axial positions. Each L ligand links two CoII ions, forming an infinite zigzag chain propagating along the c-axis direction and further stabilized by O-H⋯Cl hydrogen bonds between the methanol mol-ecules and the chloride anions. Adjacent chains in the structure are connected by inter-molecular C-H⋯Cl hydrogen bonds, resulting in the formation of a three-dimensional supra-m...
Acta crystallographica. Section E, Crystallographic communications, 2017
The asymmetric unit in the title compound, {[Ag(C12H12N2S)]·NO3} n or {[AgL]·NO3} n , L = bis-(py... more The asymmetric unit in the title compound, {[Ag(C12H12N2S)]·NO3} n or {[AgL]·NO3} n , L = bis-(pyridin-3-ylmeth-yl)sulfane, consists of an AgI cation bound to a pyridine N atom of an L ligand and an NO3- anion that is disordered over two orientations in an 0.570 (17):0.430 (17) occupancy ratio. Each AgI cation is coordinated by two pyridine N atoms from adjacent L ligands to form an infinite zigzag chain along [110]. In addition, each AgI ion binds to an S donor from a third L ligand in an adjacent parallel chain, resulting in the formation of a twisted-ribbon type of double-stranded chain propagating along the [110] or [1-10] directions. The AgI atom is displaced out of the trigonal N2S coordination plane by 0.371 (3) Å because of inter-actions between the AgI cation and O atoms of the disordered nitrate anions. Inter-molecular π-π stacking inter-actions [centroid-to-centroid distance = 3.824 (3) Å] occur between one pair of corresponding pyridine rings in the double-stranded chain...
Acta crystallographica. Section E, Crystallographic communications, 2017
The reaction of mercury(II) chloride with bis-(pyridin-3-ylmeth-yl)sulfane (L, C12H12N2S) in meth... more The reaction of mercury(II) chloride with bis-(pyridin-3-ylmeth-yl)sulfane (L, C12H12N2S) in methanol afforded the title crystalline coordination polymer catena-poly[[di-chlorido-mercury(II)]-μ-bis-(pyridin-3-ylmeth-yl)sulfane-κ2N:N'], [HgCl2L] n . The asymmetric unit consists of one HgII cation, one L ligand and two chloride anions. Each HgII ion is coordinated by two pyridine N atoms from separate L ligands and two chloride anions. The metal adopts a highly distorted tetra-hedral geometry, with bond angles about the central atom in the range 97.69 (12)-153.86 (7)°. Each L ligand bridges two HgII ions, forming an infinite -(Hg-L) n - zigzag chain along the b axis, with an Hg⋯Hg separation of 10.3997 (8) Å. In the crystal, adjacent chains are connected by inter-molecular C-H⋯Cl hydrogen bonds, together with Hg-Cl⋯π inter-actions [chloride-to-centroid distance = 3.902 (3) Å], that form between a chloride anion and the one of the pyridine rings of L, generating a two-dimensional l...
Acta crystallographica. Section E, Crystallographic communications, 2017
The asymmetric unit of the title compound, [Ir(C17H11F2N2)3]·0.5CH3(CH2)4CH3·0.5CH2Cl2, comprises... more The asymmetric unit of the title compound, [Ir(C17H11F2N2)3]·0.5CH3(CH2)4CH3·0.5CH2Cl2, comprises one IrIII atom, three 2,6-di-fluoro-3-[5-(2-fluoro-phen-yl)pyridin-2-yl]pyridin-4-yl ligands and half each of an n-hexane and a di-chloro-methane solvent mol-ecule located about crystallographic inversion centres. The IrIII atom displays a distorted octa-hedral coordination geometry, having three C,N-chelating 2,6-di-fluoro-3-[5-(2-fluoro-phen-yl)pyridin-2-yl]pyridin-4-yl ligands arranged in a meridional manner. The IrIII ion lies almost in the equatorial plane [deviation = 0.0069 (15) Å]. The average distance [2.041 (3) Å] of Ir-C bonds is slightly shorter than that [2.076 (3) Å] of Ir-N bonds. A variety of intra- and inter-molecular C-H⋯F and C-H⋯π hydrogen bonds, as well as inter-molecular C-F⋯π inter-actions, contribute to the stabilization of the mol-ecular and crystal structures, and result in the formation of a two-dimensional network parallel to the ab plane. No inter-actions be...
Acta crystallographica. Section E, Crystallographic communications, 2017
The asymmetric unit of the title compound, [Co(NO3)2L] n , L = N-(pyridine-2-ylmeth-yl)pyridine-3... more The asymmetric unit of the title compound, [Co(NO3)2L] n , L = N-(pyridine-2-ylmeth-yl)pyridine-3-amine (C11H11N3), contains one CoII centre, two nitrate anions and one L ligand in which the Cpy-C-N-Cpy moiety adopts a trans conformation with a torsion angle of -173.1 (3) Å. The coordination geometry of the CoII atom is a distorted penta-gonal bipyramid. One amine N atom from the L ligand and four O atoms from two η2-nitrato ligands form the basal plane and two pyridyl N atoms from two symmetry-related L ligands occupy the apical positions [N-Co-N = 171.86 (11)°]. The displacement of the central CoII atom from the basal plane (r.m.s. deviation = 0.085 Å) is 0.1491 (12) Å. Each bidentate nitrate group is bonded asymmetrically to the cobalt atom in an chelating fashion. The CoII ions are linked by the L ligands to form a zigzag chain propagating along the c-axis direction. Within the zigzag chain, C-H⋯O hydrogen bonds between the ligands and the nitrate anions are observed. Adjacent z...
Three anion-dependent Ag(I) coordination complexes—specifically, [Ag2(pyim)2(NO3)2] (1), {[Ag(pyi... more Three anion-dependent Ag(I) coordination complexes—specifically, [Ag2(pyim)2(NO3)2] (1), {[Ag(pyim)2]·ClO4·CH3OH·(H2O)1.25}n (2), and [Ag4(pyim)4]·(CF3SO3)4 (3)—were prepared by the reaction of the corresponding silver salts with a rigid ditopic N-terphenyl-substituted 2-(4-pyridyl)imidazole (pyim) ligand possessing an “L”-type coordination vector. Complex 1, in which the nitrate anion acts as a monodentate terminal ligand, exhibits a discrete cyclic dimer structure, whereas complex 2, incorporating a perchlorate anion with weak coordination ability, displays an anion-free one-dimensional (1D) looped chain structure resulting from the Ag sharing of consecutive cyclic dimers. When using a trifluoromethanesulfonate (triflate) as a counteranion with moderate affinity toward the metal center, the resulting complex 3 exhibits an unusual cyclic tetramer structure. In 3, the triflate anions act as bridges between adjacent cyclic tetramers via the weak interaction with the Ag(I) ions, yielding a parquet-like two-...
Acta Crystallographica Section E Crystallographic Communications
The asymmetric unit in the title compound, [Ag(C11H11N3)]PF6·2CH3CN or {[AgL]·PF6·2CH3CN} n , L =... more The asymmetric unit in the title compound, [Ag(C11H11N3)]PF6·2CH3CN or {[AgL]·PF6·2CH3CN} n , L = N-(pyridin-3-ylmethyl)pyridin-3-amine, comprises one AgI atom, one L ligand, two acetonitrile solvent molecules and one PF6 − anion disordered over two orientations in a 0.567 (11):0.433 (11) ratio. Each AgI atom is coordinated by two pyridine N atoms from two L ligands in a slightly distorted linear coordination geometry [N—Ag—N = 170.55 (8)°]. Each L ligand bridges two AgI ions, resulting in the formation of a zigzag chain propagating along the [101] direction. In the crystal, Ag...Ag contacts [3.3023 (5) Å] and intermolecular π–π stacking interactions [centroid-to-centroid distance = 3.5922 (15) Å] between the pyridine rings link these chains into a corrugated layer parallel to the (\overline{1}01) plane. The layers are stacked with a separation of 10.4532 (5) Å, and acetonitrile solvent molecules and PF6 − anions as guests are intercalated between the layers. The layers are connecte...
Acta crystallographica. Section E, Crystallographic communications, 2016
In the title compound, [Ir(C11H8N)2(C13H10NO)]·CH2Cl2, the Ir(III) ion is six-coordinated by two ... more In the title compound, [Ir(C11H8N)2(C13H10NO)]·CH2Cl2, the Ir(III) ion is six-coordinated by two C,N-bidentate 2-(pyridin-2-yl)phenyl ligands and one N,O-bidentate 2-[(phenyl-imino)-meth-yl]phenolate anion, giving rise to a distorted octa-hedral environment. The C,N-bidentate ligands, in which the C and N atoms are statistically disordered over two sites and therefore both pairs of C and N atoms are trans and cis relative to each other, are almost perpendicular to each other [the dihedral angle between the least-square planes is 87.00 (4)°]. An intra-molecular C-H⋯O hydrogen bond, as well as inter-molecular C-H⋯π inter-actions and π-π inter-actions, contribute to the stabilization of the mol-ecular and crystal structure.
Acta crystallographica. Section E, Crystallographic communications, 2016
In the title compound, {[Ag(C29H25N3)2]NO3·CH3OH·H2O} n , the Ag(I) cation is four-coordinated by... more In the title compound, {[Ag(C29H25N3)2]NO3·CH3OH·H2O} n , the Ag(I) cation is four-coordinated by two pyridine N atoms and two imidazole N atoms from four individual 4-(1-(5'-isopropyl-[1,1':3',1''-terphen-yl]-2'-yl)-1H-imidazol-2-yl)pyridine (i-pro-pyim) ligands. This gives rise to a highly distorted tetra-hedral geometry with bond angles falling in the range 100.33 (19)-122.76 (19)°. Two crystallographically independent i-pro-pyim ligands (A and B) adopt very similar conformations to one another, such that the dihedral angles between the pyridyl and imidazolyl rings in the two ligands are 40.7 (3) and 42.2 (3)°, respectively. Each i-pro-pyim ligand binds two symmetry-related Ag(+) cations, leading to the formation of 14-membered cyclic dimers, in which the Ag(I) atoms are separated by 6.963 (2) Å for the Ag-A 2-Ag dimer and 7.020 (2) Å for Ag-B 2-Ag. These cyclic dimers are alternately connected to each other by sharing Ag(I) atoms, resulting in the formati...
Acta crystallographica. Section E, Crystallographic communications, 2016
Treatment of N,N-bis-(pyridin-4-ylmeth-yl)cyclo-hexane-1,4-di-amine with hydro-chloric acid in et... more Treatment of N,N-bis-(pyridin-4-ylmeth-yl)cyclo-hexane-1,4-di-amine with hydro-chloric acid in ethanol led to the formation of the title salt, C18H26N4(2+)·2Cl(-)·2H2O, which lies about a crystallographic inversion center at the center of the cyclo-hexyl ring. The asymmetric unit therefore comprises one half of the N,N-bis-(pyridin-4-ylmeth-yl)cyclo-hexane-1,4-di-ammonium dication, a chloride anion, and a solvent water mol-ecule. In the dication, the two trans-(4-pyridine)-CH2-NH2- moieties occupy equatorial sites at the 1- and 4-positions of the central cyclo-hexyl ring, which is in a chair conformation. The terminal pyridine ring is tilted by 27.98 (5)° with respect to the mean plane of the central cyclo-hexyl moiety (r.m.s. deviation = 0.2379 Å). In the crystal, dications, anions, and solvent water mol-ecules are connected via N/C/O-H⋯Cl and N-H⋯O hydrogen bonds together with C-H⋯π inter-actions, forming a three-dimensional network.
Acta crystallographica. Section E, Crystallographic communications, 2016
The asymmetric unit of the title compound, {[HgLCl2]·0.5CHCl3} n (L = N-(pyridin-4-ylmeth-yl)pyri... more The asymmetric unit of the title compound, {[HgLCl2]·0.5CHCl3} n (L = N-(pyridin-4-ylmeth-yl)pyridin-3-amine, C11H11N3), contains one Hg(II) ion, one bridging L ligand, two chloride ligands and a chloro-form solvent mol-ecule with half-occupancy that is disordered about a crystallographic twofold rotation axis. Each Hg(II) ion is coordinated by two pyridine N atoms from two symmetry-related L ligands and two chloride anions in a highly distorted tetra-hedral geometry with bond angles falling in the range 99.05 (17)-142.96 (7)°. Each L ligand bridges two Hg(II) ions, forming polymeric zigzag chains propagating in [010]. In the crystal, the chains are linked by inter-molecular N/C-H⋯Cl hydrogen bonds together with weak C-H⋯π inter-actions, resulting in the formation of a three-dimensional supra-molecular network, which is further stabilized by C-Cl⋯π inter-actions between the solvent chloro-form mol-ecules and the pyridine rings of L [chloride-to-centroid distances = 3.442 (11) and 3....
Acta crystallographica. Section E, Crystallographic communications, 2016
In the title compound, [Ir(C11H8N)2(C18H14N)], the Ir(III) ion adopts a distorted octa-hedral coo... more In the title compound, [Ir(C11H8N)2(C18H14N)], the Ir(III) ion adopts a distorted octa-hedral coordination environment defined by three C,N-chelating ligands, one stemming from a 2-(4-phenyl-5-methyl-pyridin-2-yl)phenyl ligand and two from 2-(pyridin-2-yl)phenyl ligands, arranged in a facial manner. The Ir(III) ion lies almost in the equatorial plane [deviation = 0.0069 (15) Å]. In the crystal, inter-molecular π-π stacking inter-actions, as well as inter-molecular C-H⋯π inter-actions, are present, leading to a three-dimensional network.
Dalton transactions (Cambridge, England : 2003), Jan 30, 2017
Structural evidence is reported for C-HCl(-) hydrogen bonds in solution and in the solid state of... more Structural evidence is reported for C-HCl(-) hydrogen bonds in solution and in the solid state of HgCl2 complexes with cyclen-based cryptands. These cyclen-based cryptands (1) and (2) are bridged by di- and triethylene glycol units, respectively, between two aromatic rings. The X-ray structure indicates that the 2/HgCl2 complex contains an acetonitrile molecule in the cavity.
Department of Food and Nutrition, Kyungnam College of Information and Technology, Busan 617-701, ... more Department of Food and Nutrition, Kyungnam College of Information and Technology, Busan 617-701, KoreaReceived June 27, 2013, Accepted August 9, 2013Key Words : Coordination polymer, Silver complex, Unsymmetrical ligand, Dipyridyl ligand, Crystal struc-tureDuring last two decades, silver coordination polymersbased on dipyridyl type ligands have attracted particularinterest because of the various intriguing architecturescaused by a variety of coordination geometry of Ag(I) ion aswell as their potential applications as functional materials.
E-mail: kmpark@gnu.ac.krReceived September 17, 2012, Accepted October 2, 2012Key Words : Tetraaza... more E-mail: kmpark@gnu.ac.krReceived September 17, 2012, Accepted October 2, 2012Key Words : Tetraazadiphnolic macrocycle, Dinuclear complex, Macrocyclic cupper(II) complex, CrystalstructureOver the years the design and construction of compart-ment ligands has become a fascinating investigation field ofcoordination chemistry since metal complexes of theseligands have been used for the generation of compoundswith specific spectroscopic and magnetic properties and thusof interesting potential applications.
Acta Crystallographica Section E Crystallographic Communications
In the title compound, C24H22N4O4, the four pyridine rings are tilted slightly with respect to ea... more In the title compound, C24H22N4O4, the four pyridine rings are tilted slightly with respect to each other. The dihedral angles between the inner and outer pyridine rings are 12.51 (8) and 9.67 (9)°, while that between inner pyridine rings is 20.10 (7)°. Within the molecule, intramolecular C—H...O and C—H...N contacts are observed. In the crystal, adjacent molecules are linked by π–π stacking interactions between pyridine rings and weak C—H...π interactions between a methyl H atom and the centroid of a pyridine ring, forming a two-dimensional layer structure extending parallel to the ac plane. Hirshfeld surface analysis and two-dimensional fingerprint plots indicate that the most important contributions to the crystal packing are from H...H (52.9%) and H...C/C...H (17.3%) contacts.
Acta Crystallographica Section E Crystallographic Communications
The title compound, C12H6N4, crystallizes with four independent molecules (A, B, C and D) in the ... more The title compound, C12H6N4, crystallizes with four independent molecules (A, B, C and D) in the asymmetric unit. The dihedral angles between the two pyridine rings in each molecule are 25.25 (8)° in A, 5.51 (9)° in B, 11.11 (9)° in C and 16.24 (8)° in D. In the crystal, molecules A and B are linked by C—H...N hydrogen bonds to form layers extending parallel to the ab plane, while molecules C and D are linked by C—H...N hydrogen bonds forming –C–D–C–D– chains propagating along the b-axis direction. The layers and the chains are stacked alternately along the c axis through offset π–π and C[triple-bond]N...π [N-to-pyridine-centroid distance = 3.882 (2) Å] interactions, resulting in the formation of a supramolecular framework.
Acta crystallographica. Section E, Crystallographic communications, 2017
The asymmetric unit of the title compound, [Co(NO3)2(C12H12N2S)2] n , contains a bis-(pyridin-3-y... more The asymmetric unit of the title compound, [Co(NO3)2(C12H12N2S)2] n , contains a bis-(pyridin-3-ylmeth-yl)sulfane (L) ligand, an NO3- anion and half a CoII cation, which lies on an inversion centre. The CoII cation is six-coordinated, being bound to four pyridine N atoms from four symmetry-related L ligands. The remaining coordination sites are occupied by two O atoms from two symmetry-related nitrate anions in a monodentate manner. Thus, the CoII centre adopts a distorted octa-hedral geometry. Two symmetry-related L ligands are connected by two symmetry-related CoII cations, forming a 20-membered cyclic dimer, in which the CoII atoms are separated by 10.2922 (7) Å. The cyclic dimers are connected to each other by sharing CoII atoms, giving rise to the formation of an infinite looped chain propagating along the [101] direction. Inter-molecular C-H⋯π (H⋯ring centroid = 2.89 Å) inter-actions between one pair of corresponding L ligands and C-H⋯O hydrogen bonds between the L ligands and...
Acta crystallographica. Section E, Crystallographic communications, 2017
Reaction of bis-(pyridin-3-ylmeth-yl)sulfane (L) with cobalt(II) chloride in methanol led to the ... more Reaction of bis-(pyridin-3-ylmeth-yl)sulfane (L) with cobalt(II) chloride in methanol led to the formation of the title coordination polymer, [CoCl2(C12H12N2S)(CH3OH)2] n , in which the CoII cation lies on a crystallographic inversion centre and the S atom of the L ligand lies on a twofold rotation axis. Each CoII ion is coordinated by two pyridine N atoms from two bridging L ligands, two O atoms from methanol mol-ecules and two chloride anions, all inversion-related. The complex unit has an elongated octa-hedral geometry, in which N2O2 donor atoms occupy the equatorial positions and two chloride anions occupy the axial positions. Each L ligand links two CoII ions, forming an infinite zigzag chain propagating along the c-axis direction and further stabilized by O-H⋯Cl hydrogen bonds between the methanol mol-ecules and the chloride anions. Adjacent chains in the structure are connected by inter-molecular C-H⋯Cl hydrogen bonds, resulting in the formation of a three-dimensional supra-m...
Acta crystallographica. Section E, Crystallographic communications, 2017
The asymmetric unit in the title compound, {[Ag(C12H12N2S)]·NO3} n or {[AgL]·NO3} n , L = bis-(py... more The asymmetric unit in the title compound, {[Ag(C12H12N2S)]·NO3} n or {[AgL]·NO3} n , L = bis-(pyridin-3-ylmeth-yl)sulfane, consists of an AgI cation bound to a pyridine N atom of an L ligand and an NO3- anion that is disordered over two orientations in an 0.570 (17):0.430 (17) occupancy ratio. Each AgI cation is coordinated by two pyridine N atoms from adjacent L ligands to form an infinite zigzag chain along [110]. In addition, each AgI ion binds to an S donor from a third L ligand in an adjacent parallel chain, resulting in the formation of a twisted-ribbon type of double-stranded chain propagating along the [110] or [1-10] directions. The AgI atom is displaced out of the trigonal N2S coordination plane by 0.371 (3) Å because of inter-actions between the AgI cation and O atoms of the disordered nitrate anions. Inter-molecular π-π stacking inter-actions [centroid-to-centroid distance = 3.824 (3) Å] occur between one pair of corresponding pyridine rings in the double-stranded chain...
Acta crystallographica. Section E, Crystallographic communications, 2017
The reaction of mercury(II) chloride with bis-(pyridin-3-ylmeth-yl)sulfane (L, C12H12N2S) in meth... more The reaction of mercury(II) chloride with bis-(pyridin-3-ylmeth-yl)sulfane (L, C12H12N2S) in methanol afforded the title crystalline coordination polymer catena-poly[[di-chlorido-mercury(II)]-μ-bis-(pyridin-3-ylmeth-yl)sulfane-κ2N:N'], [HgCl2L] n . The asymmetric unit consists of one HgII cation, one L ligand and two chloride anions. Each HgII ion is coordinated by two pyridine N atoms from separate L ligands and two chloride anions. The metal adopts a highly distorted tetra-hedral geometry, with bond angles about the central atom in the range 97.69 (12)-153.86 (7)°. Each L ligand bridges two HgII ions, forming an infinite -(Hg-L) n - zigzag chain along the b axis, with an Hg⋯Hg separation of 10.3997 (8) Å. In the crystal, adjacent chains are connected by inter-molecular C-H⋯Cl hydrogen bonds, together with Hg-Cl⋯π inter-actions [chloride-to-centroid distance = 3.902 (3) Å], that form between a chloride anion and the one of the pyridine rings of L, generating a two-dimensional l...
Acta crystallographica. Section E, Crystallographic communications, 2017
The asymmetric unit of the title compound, [Ir(C17H11F2N2)3]·0.5CH3(CH2)4CH3·0.5CH2Cl2, comprises... more The asymmetric unit of the title compound, [Ir(C17H11F2N2)3]·0.5CH3(CH2)4CH3·0.5CH2Cl2, comprises one IrIII atom, three 2,6-di-fluoro-3-[5-(2-fluoro-phen-yl)pyridin-2-yl]pyridin-4-yl ligands and half each of an n-hexane and a di-chloro-methane solvent mol-ecule located about crystallographic inversion centres. The IrIII atom displays a distorted octa-hedral coordination geometry, having three C,N-chelating 2,6-di-fluoro-3-[5-(2-fluoro-phen-yl)pyridin-2-yl]pyridin-4-yl ligands arranged in a meridional manner. The IrIII ion lies almost in the equatorial plane [deviation = 0.0069 (15) Å]. The average distance [2.041 (3) Å] of Ir-C bonds is slightly shorter than that [2.076 (3) Å] of Ir-N bonds. A variety of intra- and inter-molecular C-H⋯F and C-H⋯π hydrogen bonds, as well as inter-molecular C-F⋯π inter-actions, contribute to the stabilization of the mol-ecular and crystal structures, and result in the formation of a two-dimensional network parallel to the ab plane. No inter-actions be...
Acta crystallographica. Section E, Crystallographic communications, 2017
The asymmetric unit of the title compound, [Co(NO3)2L] n , L = N-(pyridine-2-ylmeth-yl)pyridine-3... more The asymmetric unit of the title compound, [Co(NO3)2L] n , L = N-(pyridine-2-ylmeth-yl)pyridine-3-amine (C11H11N3), contains one CoII centre, two nitrate anions and one L ligand in which the Cpy-C-N-Cpy moiety adopts a trans conformation with a torsion angle of -173.1 (3) Å. The coordination geometry of the CoII atom is a distorted penta-gonal bipyramid. One amine N atom from the L ligand and four O atoms from two η2-nitrato ligands form the basal plane and two pyridyl N atoms from two symmetry-related L ligands occupy the apical positions [N-Co-N = 171.86 (11)°]. The displacement of the central CoII atom from the basal plane (r.m.s. deviation = 0.085 Å) is 0.1491 (12) Å. Each bidentate nitrate group is bonded asymmetrically to the cobalt atom in an chelating fashion. The CoII ions are linked by the L ligands to form a zigzag chain propagating along the c-axis direction. Within the zigzag chain, C-H⋯O hydrogen bonds between the ligands and the nitrate anions are observed. Adjacent z...
Three anion-dependent Ag(I) coordination complexes—specifically, [Ag2(pyim)2(NO3)2] (1), {[Ag(pyi... more Three anion-dependent Ag(I) coordination complexes—specifically, [Ag2(pyim)2(NO3)2] (1), {[Ag(pyim)2]·ClO4·CH3OH·(H2O)1.25}n (2), and [Ag4(pyim)4]·(CF3SO3)4 (3)—were prepared by the reaction of the corresponding silver salts with a rigid ditopic N-terphenyl-substituted 2-(4-pyridyl)imidazole (pyim) ligand possessing an “L”-type coordination vector. Complex 1, in which the nitrate anion acts as a monodentate terminal ligand, exhibits a discrete cyclic dimer structure, whereas complex 2, incorporating a perchlorate anion with weak coordination ability, displays an anion-free one-dimensional (1D) looped chain structure resulting from the Ag sharing of consecutive cyclic dimers. When using a trifluoromethanesulfonate (triflate) as a counteranion with moderate affinity toward the metal center, the resulting complex 3 exhibits an unusual cyclic tetramer structure. In 3, the triflate anions act as bridges between adjacent cyclic tetramers via the weak interaction with the Ag(I) ions, yielding a parquet-like two-...
Acta Crystallographica Section E Crystallographic Communications
The asymmetric unit in the title compound, [Ag(C11H11N3)]PF6·2CH3CN or {[AgL]·PF6·2CH3CN} n , L =... more The asymmetric unit in the title compound, [Ag(C11H11N3)]PF6·2CH3CN or {[AgL]·PF6·2CH3CN} n , L = N-(pyridin-3-ylmethyl)pyridin-3-amine, comprises one AgI atom, one L ligand, two acetonitrile solvent molecules and one PF6 − anion disordered over two orientations in a 0.567 (11):0.433 (11) ratio. Each AgI atom is coordinated by two pyridine N atoms from two L ligands in a slightly distorted linear coordination geometry [N—Ag—N = 170.55 (8)°]. Each L ligand bridges two AgI ions, resulting in the formation of a zigzag chain propagating along the [101] direction. In the crystal, Ag...Ag contacts [3.3023 (5) Å] and intermolecular π–π stacking interactions [centroid-to-centroid distance = 3.5922 (15) Å] between the pyridine rings link these chains into a corrugated layer parallel to the (\overline{1}01) plane. The layers are stacked with a separation of 10.4532 (5) Å, and acetonitrile solvent molecules and PF6 − anions as guests are intercalated between the layers. The layers are connecte...
Acta crystallographica. Section E, Crystallographic communications, 2016
In the title compound, [Ir(C11H8N)2(C13H10NO)]·CH2Cl2, the Ir(III) ion is six-coordinated by two ... more In the title compound, [Ir(C11H8N)2(C13H10NO)]·CH2Cl2, the Ir(III) ion is six-coordinated by two C,N-bidentate 2-(pyridin-2-yl)phenyl ligands and one N,O-bidentate 2-[(phenyl-imino)-meth-yl]phenolate anion, giving rise to a distorted octa-hedral environment. The C,N-bidentate ligands, in which the C and N atoms are statistically disordered over two sites and therefore both pairs of C and N atoms are trans and cis relative to each other, are almost perpendicular to each other [the dihedral angle between the least-square planes is 87.00 (4)°]. An intra-molecular C-H⋯O hydrogen bond, as well as inter-molecular C-H⋯π inter-actions and π-π inter-actions, contribute to the stabilization of the mol-ecular and crystal structure.
Acta crystallographica. Section E, Crystallographic communications, 2016
In the title compound, {[Ag(C29H25N3)2]NO3·CH3OH·H2O} n , the Ag(I) cation is four-coordinated by... more In the title compound, {[Ag(C29H25N3)2]NO3·CH3OH·H2O} n , the Ag(I) cation is four-coordinated by two pyridine N atoms and two imidazole N atoms from four individual 4-(1-(5'-isopropyl-[1,1':3',1''-terphen-yl]-2'-yl)-1H-imidazol-2-yl)pyridine (i-pro-pyim) ligands. This gives rise to a highly distorted tetra-hedral geometry with bond angles falling in the range 100.33 (19)-122.76 (19)°. Two crystallographically independent i-pro-pyim ligands (A and B) adopt very similar conformations to one another, such that the dihedral angles between the pyridyl and imidazolyl rings in the two ligands are 40.7 (3) and 42.2 (3)°, respectively. Each i-pro-pyim ligand binds two symmetry-related Ag(+) cations, leading to the formation of 14-membered cyclic dimers, in which the Ag(I) atoms are separated by 6.963 (2) Å for the Ag-A 2-Ag dimer and 7.020 (2) Å for Ag-B 2-Ag. These cyclic dimers are alternately connected to each other by sharing Ag(I) atoms, resulting in the formati...
Acta crystallographica. Section E, Crystallographic communications, 2016
Treatment of N,N-bis-(pyridin-4-ylmeth-yl)cyclo-hexane-1,4-di-amine with hydro-chloric acid in et... more Treatment of N,N-bis-(pyridin-4-ylmeth-yl)cyclo-hexane-1,4-di-amine with hydro-chloric acid in ethanol led to the formation of the title salt, C18H26N4(2+)·2Cl(-)·2H2O, which lies about a crystallographic inversion center at the center of the cyclo-hexyl ring. The asymmetric unit therefore comprises one half of the N,N-bis-(pyridin-4-ylmeth-yl)cyclo-hexane-1,4-di-ammonium dication, a chloride anion, and a solvent water mol-ecule. In the dication, the two trans-(4-pyridine)-CH2-NH2- moieties occupy equatorial sites at the 1- and 4-positions of the central cyclo-hexyl ring, which is in a chair conformation. The terminal pyridine ring is tilted by 27.98 (5)° with respect to the mean plane of the central cyclo-hexyl moiety (r.m.s. deviation = 0.2379 Å). In the crystal, dications, anions, and solvent water mol-ecules are connected via N/C/O-H⋯Cl and N-H⋯O hydrogen bonds together with C-H⋯π inter-actions, forming a three-dimensional network.
Acta crystallographica. Section E, Crystallographic communications, 2016
The asymmetric unit of the title compound, {[HgLCl2]·0.5CHCl3} n (L = N-(pyridin-4-ylmeth-yl)pyri... more The asymmetric unit of the title compound, {[HgLCl2]·0.5CHCl3} n (L = N-(pyridin-4-ylmeth-yl)pyridin-3-amine, C11H11N3), contains one Hg(II) ion, one bridging L ligand, two chloride ligands and a chloro-form solvent mol-ecule with half-occupancy that is disordered about a crystallographic twofold rotation axis. Each Hg(II) ion is coordinated by two pyridine N atoms from two symmetry-related L ligands and two chloride anions in a highly distorted tetra-hedral geometry with bond angles falling in the range 99.05 (17)-142.96 (7)°. Each L ligand bridges two Hg(II) ions, forming polymeric zigzag chains propagating in [010]. In the crystal, the chains are linked by inter-molecular N/C-H⋯Cl hydrogen bonds together with weak C-H⋯π inter-actions, resulting in the formation of a three-dimensional supra-molecular network, which is further stabilized by C-Cl⋯π inter-actions between the solvent chloro-form mol-ecules and the pyridine rings of L [chloride-to-centroid distances = 3.442 (11) and 3....
Acta crystallographica. Section E, Crystallographic communications, 2016
In the title compound, [Ir(C11H8N)2(C18H14N)], the Ir(III) ion adopts a distorted octa-hedral coo... more In the title compound, [Ir(C11H8N)2(C18H14N)], the Ir(III) ion adopts a distorted octa-hedral coordination environment defined by three C,N-chelating ligands, one stemming from a 2-(4-phenyl-5-methyl-pyridin-2-yl)phenyl ligand and two from 2-(pyridin-2-yl)phenyl ligands, arranged in a facial manner. The Ir(III) ion lies almost in the equatorial plane [deviation = 0.0069 (15) Å]. In the crystal, inter-molecular π-π stacking inter-actions, as well as inter-molecular C-H⋯π inter-actions, are present, leading to a three-dimensional network.
Dalton transactions (Cambridge, England : 2003), Jan 30, 2017
Structural evidence is reported for C-HCl(-) hydrogen bonds in solution and in the solid state of... more Structural evidence is reported for C-HCl(-) hydrogen bonds in solution and in the solid state of HgCl2 complexes with cyclen-based cryptands. These cyclen-based cryptands (1) and (2) are bridged by di- and triethylene glycol units, respectively, between two aromatic rings. The X-ray structure indicates that the 2/HgCl2 complex contains an acetonitrile molecule in the cavity.
Uploads
Papers by Ki-Min Park