Crystal structure of kinetic and thermodynamic coordination networks formed between 3,3′-dipyridylethyne and copper bromide

Abstract

Reaction of copper(I) bromide with 3,3′-dipyridylethyne yielded rhomboid yellow crystals that are stable when removed from the mother liquor. X-Ray crystallographic analysis identified the one-dimensional coordination polymer formed with pairs of dipyridyl ligands bridging rhombic CuBr₂Cu units. The crystals left in the mother liquor re-dissolved and formed orange hexagonal prisms that were shown to be a stable three-dimensional network comprising interwoven ligand–copper ribbons linked together by infinite copper–bromide chains.