Abstract

Copper(I) complexes of the general formula (CuX) n L m , where L = 4-methylquinoline, n = 1, m = 1 for X = Cl, Br, I, SCN and N 3, n = 1, m = 2 for X = NO 3 and ClO 4, and n = 2, m = 3 for X = Cl and Br were prepared and characterized. Excepting the perchlorate complex all other complexes are colored and exhibit strong CT bands in the visible region. The infrared spectral data suggest the presence of bridging halide and pseudohalide, monodentate nitrate, and bidentate perchlorate groups in the respective complexes. The structure of the 2:3 chloro complex was determined by X-ray crystallography. The crystals are triclinic, space group P 1 , with a = 10.587(1), b = 11.321(3), c = 11.329(3) Å, α = 85.17(2), β = 89.67(2), γ = 80.88(2)° and Z = 1. The structure was refined to R F = 0.053 for 3174 observed Mo Kα diffractometer data. The discrete [Cu 2Cl 2(4-methylquinoline) 3] 2 molecule is centrosymmetric with a short Cu(1)…Cu(2′) contact of 2.777(1) Å, and has the ‘step’ structure well known for Cu 4X 4L 4 species; however, the copper atoms at the periphery of the ‘step’ are coordinated by a pair of nitrogen ligands.

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