Different structural destinations: comparing reactions of [CuBr2(3-Brpy)(2)] crystals with HBr and HCl gas

作者：Minguez Espallargas Guillermo; Florence Alastair J; van de Streek Jacco; Brammer Lee^*

来源：CrystEngComm, 2011, 13(13): 4400-4404.

DOI：10.1039/c1ce05222e

Reaction of green crystalline solid trans-[CuBr2(3-Brpy)(2)] 1 (3-Brpy = 3-bromopyridine) with HBr (aq) vapour yields brown crystalline salt (3-BrpyH)(2)[CuBr4]2 with quantitative conversion. Notably 2 adopts a different crystal structure to the three mutually isostructural compounds (3-XpyH)(2)[CuCl4] (X = Cl, Br) and (3-BrpyH)(2)[CuBr2Cl2] which result from reaction with HCl. Crystalline product 2 has been characterised by X-ray powder diffraction and its conversion back to 1 at 370-400 K has been followed in situ by synchrotron X-ray powder diffraction. Crystalline 1 and 2 are further notable for the presence of intermolecular C-Br center dot center dot center dot Br-Cu halogen bonds and (only in the case of 2) N-H center dot center dot center dot Br-Cu hydrogen bonds.

• 出版日期2011-7