A new, quick and economical decolorization assay based upon the generation of a radical cation ma... more A new, quick and economical decolorization assay based upon the generation of a radical cation made from promethazine hydrochloride (PMZH) is described for screening of antioxidant activity of plants/herbal extracts. PMZH radical cations, produced through a reaction between PMZH and potassium persulfate (K2S2O8) in phosphoric acid medium, have maximum absorption at 515 nm in their first-order derivative spectrum. Theconcentrations of
Acta Crystallographica Section E Structure Reports Online, 2012
In the asymmetric unit of the title compound, C15H16N2O5S2, there are two symmetry-independent mo... more In the asymmetric unit of the title compound, C15H16N2O5S2, there are two symmetry-independent molecules which adopt similar conformations, with dihedral angles between the aromatic rings of 59.30 (8) and 61.81 (8)°, and dihedral angles between acetamide group and the benzene ring of 77.08 (10) and 78.40 (10)°. Each type of molecule forms similar one-dimensional polymeric structures extending along thebaxisviaN—H...O hydrogen bonds. These hydrogen bonds generate two types of centrosymmetric motifs,R22(8) andR22(20). Moreover C—H...O interactions assemble the molecules into a three-dimensional framework. The crystal structure was determined from a non-merohedral twin [ratio of the twin components = 0.322 (4):0.678 (4)].
Acta Crystallographica Section E Structure Reports Online, 2012
In the title compound, C24H18ClN3O2S, the dihedral angle between the benzene ring and the anthrac... more In the title compound, C24H18ClN3O2S, the dihedral angle between the benzene ring and the anthracene ring system is 41.10 (8)°. The thiazine ring has a half-chair conformation and the Cl atom is in an axial orientation. In the crystal, molecules are linked by C—H...O interactions, generating C(8) chains along [100]. A C—H...N short contact occurs in the molecule, generating an S(6) ring.
A new, quick and economical decolorization assay based upon the generation of a radical cation ma... more A new, quick and economical decolorization assay based upon the generation of a radical cation made from promethazine hydrochloride (PMZH) is described for screening of antioxidant activity of plants/herbal extracts. PMZH radical cations, produced through a reaction between PMZH and potassium persulfate (K2S2O8) in phosphoric acid medium, have maximum absorption at 515 nm in their first-order derivative spectrum. Theconcentrations of
Acta Crystallographica Section E Structure Reports Online, 2012
In the asymmetric unit of the title compound, C15H16N2O5S2, there are two symmetry-independent mo... more In the asymmetric unit of the title compound, C15H16N2O5S2, there are two symmetry-independent molecules which adopt similar conformations, with dihedral angles between the aromatic rings of 59.30 (8) and 61.81 (8)°, and dihedral angles between acetamide group and the benzene ring of 77.08 (10) and 78.40 (10)°. Each type of molecule forms similar one-dimensional polymeric structures extending along thebaxisviaN—H...O hydrogen bonds. These hydrogen bonds generate two types of centrosymmetric motifs,R22(8) andR22(20). Moreover C—H...O interactions assemble the molecules into a three-dimensional framework. The crystal structure was determined from a non-merohedral twin [ratio of the twin components = 0.322 (4):0.678 (4)].
Acta Crystallographica Section E Structure Reports Online, 2012
In the title compound, C24H18ClN3O2S, the dihedral angle between the benzene ring and the anthrac... more In the title compound, C24H18ClN3O2S, the dihedral angle between the benzene ring and the anthracene ring system is 41.10 (8)°. The thiazine ring has a half-chair conformation and the Cl atom is in an axial orientation. In the crystal, molecules are linked by C—H...O interactions, generating C(8) chains along [100]. A C—H...N short contact occurs in the molecule, generating an S(6) ring.
Uploads