Tris(μ4-azepane-1-carbodithioato)bis(μ3- azepane-1-carbodithioato)-μ9-bromido-tetra-μ2- bromido-octacopper(I)copper(II)

Abstract

The reaction of Cu(Hm-dtc)2 (H2m-dtc is azepane-1-carbodithioic acid), CuBr2 and methyl isothiocyanate yielded the title mixed-valence nonanuclear CuI/CuII compound, [Cu 9Br5(C7H12NS2) 5] or [CuI 8CuIIBr5(Hm-dtc)5], encapsulating a bromide anion in the center of the Cu9Br 4S10 cluster cage. The cage consists of a mononuclear CuII unit [Cu(Hm-dtc)2], three μ4-bridging Hm-dtc- ligands, eight CuI ions with distorted tetrahedral or trigonal pyramidal coordination geometries and four μ2-bridging bromide anions. The incorporated central bromide anion interacts with nine Cu ions with shorter Cu - Br separations than the sum of the van der Waals radii for Cu and Br.