Crystal and molecular structure of tetra-µ-o-bromobenzoato-bis[aquocopper(II)]

Abstract

Crystals of the title compound are monoclinic, a= 7·384(6), b= 20·02(2), c= 11·04(1)Å, β= 105·4(1)°Z= 2, space group P2₁.n. The structure was determined by Patterson and Fourier syntheses, and refined by fullmatrix least-square methods to R0·099 for 985 observed reflexions. The crystal structure consists of centrosymmetric dimers, with four o-bromobenzoate anions forming syn–syn bridges between the pairs of copper atoms. Cu–Cu is 2·624(7), mean Cu–O(carboxylate) 1·99(3), and Cu–O(H₂O) 2·17(2)Å. Intermolecular hydrogen bonds (O ⋯ O 2·89 Å) are probably present.