ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance t... more ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Studies have shown that complex Zintl phases exhibit a rich diversity of crystal structures. Thes... more Studies have shown that complex Zintl phases exhibit a rich diversity of crystal structures. These have also revealed a remarkable success of the Zintl concept in rationalizing stoichiometry, crystal structure and chemical bonding of many main group intermetallics. Still there are unresolved questions about the usefulness of the concept in explaining structure-property relationships in intermetallics near the Zintl border, and as a rational tool in designing new materials. Limitations of the concept are represented by violations often associated with “electron-deficient” phases that contain Group 13 metalloids. Recent investigations on “electron-deficient” Zintl phases containing post transition metals have led to the synthesis of a number of novel inorganic-intermetallic π-systems. Since unique structures and properties are already apparent in normal Zintl phases, it is anticipated that the exploratory synthesis and characterization of conjugated and multiple-bonded inorganic syste...
Two new isostructural Zintl phases, EuInGe and SrInGe, are obtained from high-temperature reactio... more Two new isostructural Zintl phases, EuInGe and SrInGe, are obtained from high-temperature reactions of the pure elements in welded Ta tubes. Both ternary phases crystallize in a new structure type in space group Pnma (No. 62), with a = 4.921(1) A, b = 3.9865(9) A, and c = 16.004(3) A for EuInGe; and a = 5.021(1) A, b = 4.0455(9) A, and c = 16.188(4) A for SrInGe. The crystal structures established by single-crystal X-ray diffraction feature zigzag chains of 3-bonded Ge atoms and puckered layers of 4-bonded In atoms. The two structural units are linked into an anionic network with channels composed of 5-membered and 7-membered rings. The channels are filled by the respective divalent cations. The chemical bonding of the anionic [InGe](2)(-) network, derived from a one-electron oxidative distortion of the alpha-ThSi(2) structure, is explained using extended-Hückel band structure calculations. Magnetic measurements indicate that EuInGe exhibits Curie-Weiss paramagnetic behavior above 35 K and antiferromagnetic behavior below 35 K. The calculated effective moment, mu(eff) = 8.11 mu(B), of EuInGe and the diamagnetic behavior of SrInGe are consistent with the oxidation states of Eu(II) and Sr(II), respectively.
On the Cover: Hibiscus is a genus of the family Malvaceae, native in tropical and subtropical reg... more On the Cover: Hibiscus is a genus of the family Malvaceae, native in tropical and subtropical regions. Photos of the hibiscus hybrid varieties were taken from the article of Cabarrubias et al.
Debtanu De, Guoxiong Su, Sean See, Arnold Guloy, Chin-Sen Ting, and Haibing Peng Department of Ph... more Debtanu De, Guoxiong Su, Sean See, Arnold Guloy, Chin-Sen Ting, and Haibing Peng Department of Physics, University of Houston, Houston, Texas 77204, USA Texas Center for Superconductivity, University of Houston, Houston, Texas 77204, USA Department of Chemistry, University of Houston, Houston, Texas 77204, USA Institute of Chemistry, University of the Philippines, Diliman, 1101 Quezon City, Philippines
The first bis(ethylenedithio)tetrathiafulvalene (ET) based radical cation salt with a bimetallic ... more The first bis(ethylenedithio)tetrathiafulvalene (ET) based radical cation salt with a bimetallic dithiooxalato-bridged anionic network, β″-(ET)2{[NMe3Ph]NaCr(C2S2O2)3(MeCN)} has been prepared. The compound is metallic down to 60 K, at lower temperatures the resistance grows smoothly. The structure of β″-(ET)2{[NMe3Ph]NaCr(C2S2O2)3(MeCN)} has been determined from single-crystal X-ray diffraction and is characterized by alternation a conducting donor layer of the β″-type packing with three insulating layers, two of which are {[NaCr(dto)3]2−}∞ anionic networks and the third one, interleaving them, is formed by [NMe3Ph]+organic cations and acetonitrile solvent molecules.
ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance t... more ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Studies have shown that complex Zintl phases exhibit a rich diversity of crystal structures. Thes... more Studies have shown that complex Zintl phases exhibit a rich diversity of crystal structures. These have also revealed a remarkable success of the Zintl concept in rationalizing stoichiometry, crystal structure and chemical bonding of many main group intermetallics. Still there are unresolved questions about the usefulness of the concept in explaining structure-property relationships in intermetallics near the Zintl border, and as a rational tool in designing new materials. Limitations of the concept are represented by violations often associated with “electron-deficient” phases that contain Group 13 metalloids. Recent investigations on “electron-deficient” Zintl phases containing post transition metals have led to the synthesis of a number of novel inorganic-intermetallic π-systems. Since unique structures and properties are already apparent in normal Zintl phases, it is anticipated that the exploratory synthesis and characterization of conjugated and multiple-bonded inorganic syste...
Two new isostructural Zintl phases, EuInGe and SrInGe, are obtained from high-temperature reactio... more Two new isostructural Zintl phases, EuInGe and SrInGe, are obtained from high-temperature reactions of the pure elements in welded Ta tubes. Both ternary phases crystallize in a new structure type in space group Pnma (No. 62), with a = 4.921(1) A, b = 3.9865(9) A, and c = 16.004(3) A for EuInGe; and a = 5.021(1) A, b = 4.0455(9) A, and c = 16.188(4) A for SrInGe. The crystal structures established by single-crystal X-ray diffraction feature zigzag chains of 3-bonded Ge atoms and puckered layers of 4-bonded In atoms. The two structural units are linked into an anionic network with channels composed of 5-membered and 7-membered rings. The channels are filled by the respective divalent cations. The chemical bonding of the anionic [InGe](2)(-) network, derived from a one-electron oxidative distortion of the alpha-ThSi(2) structure, is explained using extended-Hückel band structure calculations. Magnetic measurements indicate that EuInGe exhibits Curie-Weiss paramagnetic behavior above 35 K and antiferromagnetic behavior below 35 K. The calculated effective moment, mu(eff) = 8.11 mu(B), of EuInGe and the diamagnetic behavior of SrInGe are consistent with the oxidation states of Eu(II) and Sr(II), respectively.
On the Cover: Hibiscus is a genus of the family Malvaceae, native in tropical and subtropical reg... more On the Cover: Hibiscus is a genus of the family Malvaceae, native in tropical and subtropical regions. Photos of the hibiscus hybrid varieties were taken from the article of Cabarrubias et al.
Debtanu De, Guoxiong Su, Sean See, Arnold Guloy, Chin-Sen Ting, and Haibing Peng Department of Ph... more Debtanu De, Guoxiong Su, Sean See, Arnold Guloy, Chin-Sen Ting, and Haibing Peng Department of Physics, University of Houston, Houston, Texas 77204, USA Texas Center for Superconductivity, University of Houston, Houston, Texas 77204, USA Department of Chemistry, University of Houston, Houston, Texas 77204, USA Institute of Chemistry, University of the Philippines, Diliman, 1101 Quezon City, Philippines
The first bis(ethylenedithio)tetrathiafulvalene (ET) based radical cation salt with a bimetallic ... more The first bis(ethylenedithio)tetrathiafulvalene (ET) based radical cation salt with a bimetallic dithiooxalato-bridged anionic network, β″-(ET)2{[NMe3Ph]NaCr(C2S2O2)3(MeCN)} has been prepared. The compound is metallic down to 60 K, at lower temperatures the resistance grows smoothly. The structure of β″-(ET)2{[NMe3Ph]NaCr(C2S2O2)3(MeCN)} has been determined from single-crystal X-ray diffraction and is characterized by alternation a conducting donor layer of the β″-type packing with three insulating layers, two of which are {[NaCr(dto)3]2−}∞ anionic networks and the third one, interleaving them, is formed by [NMe3Ph]+organic cations and acetonitrile solvent molecules.
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