Search

The title compound, C13H7N5O3·C2H6O, was synthesized by the reaction of 2-cyanoacetamide, malononitrile and 3-nitrobenzaldehyde in water. The asymmetric unit contains two crystallographically independent 6-amino-4-(3-nitrophenyl)-2-oxo-1,2-dihydropyridine-3,5-dicarbonitrile molecules of similar conformation and two ethanol solvent molecules. The nitro group of one molecule is disordered over two positions with site-occupation factors of 0.688 (17) and 0.312 (17). The dihedral angles between the pyridine and benzene rings are 52.06 (11) and 65.12 (13)° in the two molecules. The crystal packing is stabilized by N—H...O, N—H...N, O—H...O and C—H...O intra- and intermolecular hydrogen bonds. [ABSTRACT FROM AUTHOR]

Cadmium phosphite, CdHPO3, was obtained by mild hydro­thermal synthesis. The construction of the three-dimensional framework structure may be viewed as an assembly of distorted CdO6 octa­hedra and HPO3 tetra­hedra which leads to the formation of channels along [001]. The crystal structure is isotypic with CdSO3-III and is a new example of the stereochemical equivalence of the P-bonded H atom in HPO32− and the electron lone pair in XO32− oxoanions ( X = SIV or SeIV). [ABSTRACT FROM AUTHOR]

The title complex, [Cu2(C23H14O6)2(C2H8N2)2(H2O)2], is composed of discrete centrosymmetric mol­ecular dimers, with each CuII atom in a slightly distorted square-pyramidal coordination geometry. The CuII atom is coordinated by two N atoms from an ethyl­enediamine mol­ecule, two O atoms from two pamoate ligands and one water O atom. The dimers are linked via hydrogen bonds, forming a two-dimensional supra­molecular network. [ABSTRACT FROM AUTHOR]