Crystal and molecular structure of tetrakis[copper(I) benzoate]

Abstract

Crystals of the title compound are triclinic, space group P, cell dimensions a= 15.408(7). b= 13.784(12), c= 15.034(9)Å, α= 92.43(6), β= 62.34(5). γ= 112.71(6)°. Z= 4. 2 262 Independent reflections above background were collected by counter methods: the structure was solved by direct methods and refined by full-matrix least squares to R 0.064. There are two independent tetramers in the asymmetric unit which have similar but not identical geometries in which four copper atoms form a parallelogram (internal angles 114.5, 65.5 and 108.8, 71.2° respectively in the two tetramers), with minimum Cu ⋯ Cu distances of 2.71 Å. The four benzoates bridge adjacent Cu ⋯ Cu atoms around the parallelogram and are alternately above and below the plane. The Cu–O distances are ca. 1.84 Å.