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The dinuclear oxidovanadium(IV/V) complex, [V2(HS2O8)O3(C18H24N2)2]⋅- CH3CN or [V2O2(μ-O)( μ-H(SO4)2)(4,4'-tBubpy)2]⋅CH3CN (4,40-tBubpy = 4,4'-di-tert-butyl-2,2'-bipyridine), has crystallographic C2 symmetry and exhibits a distorted octahedral geometry around the vanadium center, where the two 4,4'-tBubpy ligands are nearly orthogonal to each other. The two vanadium ions are linked by an oxo anion and a unique protonated sulfate anion [H(SO4)23-]. In the crystal, intermolecular C--H⋯π and π--π interactions between the 4,4'-tBubpy ligands are present, leading to a three-dimensional network. [ABSTRACT FROM AUTHOR]

Two new coordination polymers of cadmium-containing polynitrile ligands have been synthesized using sovothermal methods. In both poly[trans,trans,transbis(·-dicyanamido-κ²N¹:N³)bis(2-methylbenzimidazole-κN)cadmium(II)], [Cd(C2N3)2(C8H8N2)2]n, (I), and poly[trans,trans,trans-bis(2-methylbenzimidazole-κN)bis(·-tricyanomethanido-κ²N:N'cadmium(II)], [Cd(C4N3)2- (C8H8N2)2]n, (II), the Cd atom lies on a centre of inversion, in space groups P21/n and P21/c, respectively. In each polymer, each anionic ligand acts as a bridge between two metal centres, forming sheets of 24-membered rings, and in each structure a single N--H· · ·N hydrogen bond links the polymer sheets to form a three-dimensional framework structure. Comparisons are made with the structures of some related complexes. [ABSTRACT FROM AUTHOR]