Acta Cryst. (2005). E61, m98-m100  [ doi:10.1107/S1600536804031903 ]

-4,4'-Di-4-pyridyldiazene-²N:N'-bis{[1,1,1-tris(diphenylphosphinomethyl)ethane-P³]copper(I)} bis(tetrafluoroborate) dichloromethane solvate

M.-M. Yu, Z.-X. Li, W.-F. Fu and J.-F. Zhang

Abstract: The title complex, [Cu₂(C₁₀H₄N₄)(C₄₁H₃₉P₃)₂](BF₄)₂·CH₂Cl₂, was synthesized and characterized. Two copper(I) ions are bridged by 4,4'-di-4-pyridyldiazene (more commonly as 4,4'-azobipyridine). The discrete dinuclear cation contains two distorted tetrahedral copper(I) centers. Each Cu^I atom is coordinated by one 1,1,1-tris(diphenylphosphinomethyl)ethane molecule and one 4,4'-azobipyridine ligand. The complex sits on a center of symmetry; the solvent molecule is disordered across another center of symmetry. On irradiation of the copper(I) complex in dichloromethane at 365  nm, the trans/cis ratio of the complex is reversed.

Online 11 December 2004

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