Showing papers by "Roya Ahmadi published in 2010"

(4,4′-Dimethyl-2,2′-bipyridine-κ2N,N′)(dimethyl sulfoxide-κO)diiodidocadmium(II)

Abstract: In the title compound, [CdI2(C12H12N2)(C2H6OS)], the CdII cation is coordinated by two N atoms from a dimethyl­bipyridine ligand, one O atom from a dimethyl sulfoxide mol­ecule and two I− anions in a distorted trigonal–bipyramidal geometry Intra­molecular C—H⋯O hydrogen bonding and inter­molecular π–π stacking between parallel pyridine rings [centroid–centroid distance = 3658 (3) A] are present in the crystal structure

Dibromido(6-methyl-2,2′-bipyridine-κ2N,N′)zinc(II)

Abstract: In the title compound, [ZnBr2(C11H10N2)], the ZnII atom is four-coordinated in a distorted tetra­hedral configuration by two N atoms from a 6-methyl-2,2′-bipyridine ligand and two terminal Br atoms. Weak inter­molecular C—H⋯Br hydrogen bonds and π–π stacking inter­actions between the pyridine rings [centroid–centroid distances = 3.763 (5) and 3.835 (6) A] contribute to crystal-packing effects.

Dibromido(2,3,5,6-tetra-2-pyridyl-pyrazine-κN,N,N)zinc(II).

Abstract: In the title compound, [ZnBr2(C24H16N6)], the ZnII ion is coordinated by the N,N′,N′′-tridentate 2,3,5,6-tetra-2-pyridyl­pyrazine ligand and two bromide ions, generating a distorted ZnN3Br2 trigonal-bipyramidal geometry for the metal ion, with both bromide ions in equatorial sites. The dihedral angles between the pyrazine ring and the coordinated pyridine rings are 13.3 (2) and 24.8 (2)°; those between the pyrazine ring and the uncoordinated pyradine rings are 31.3 (2) and 44.2 (2)°. In the crystal, inversion dimers linked by pairs of weak C—H⋯Br hydrogen bonds occur.