Crystal structure of bis(N-methylethylenediammonium) hexabromodicuprate(I)

摘要

The crystal structure of the title compound (C3H12N2)(2)Cu2Br6, is monoclinic, space group P2(1), with lattice constants a = 8.222(2), b = 11.214(2), c = 10.646(2) Angstrom, beta = 91.97(1)degrees and V = 981.0(3) Angstrom(3). The structure contains anionic Cu2Br62- dimers and N-methylethylenediammonium (henceforth MEDA(2+)) cations. The centrosymmetric dimer units are composed of two edge-shared CuBr4 tetrahedra, with bridging Cu-Br distances 0.08 Angstrom longer than the terminal distances. A pair of MEDA(2-) cations hydrogen bond to each dimer via two of the -NH3+ hydrogen atoms and one of the -NH2+ - hydrogen atoms. Additional hydrogen bonding between the cations and anions tie the structure together in a complex supramolecular network. (C) 2003 Elsevier B.V. All rights reserved. [References: 39]