Crystal structure of the [(1,3-dimesityl-1H-imidazol-3-ium-2-yl)methano­lato]copper(II) chloride dimer: insertion of formaldehyde into a copper–carbene bond

Acta Crystallographica Section E: Crystallographic Communications

Kennedy, A.R.¹  Dodds, C.A.² 

[1] Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, Scotland, UK;WestCHEM, Department of Pure &

关键词: CRYSTAL STRUCTURE;    COPPER;    N-HETEROCYCLIC CARBENE;    INSERTION;    FORMALDEHYDE;   

DOI  :  10.1107/S205698901801201X

学科分类：数学（综合）

来源: International Union of Crystallography

【 摘 要 】

The crystal structure of bis­[μ-(1,3-dimesityl-1H-imidazol-3-ium-2-yl)methano­lato-κ2O:O]bis­[di­chlorido­copper(II)], [Cu2Cl4(C22H26N2O)2], is reported. The complex is assumed to have formed via the insertion of formaldehyde into the copper–carbon bond in an N-heterocyclic carbene complex of copper(I) chloride. The structure of the binuclear mol­ecule possesses a crystallographic­ally centrosymmetric Cu2O2 central core with the O atoms bridging between the CuII atoms and thus Z′ = 0.5. The copper centres are further ligated by two chloride ligands, resulting in the CuII atoms residing in a distorted square-planar environment. The Cu—O bond lengths are shorter than those previously reported in structures with the same central Cu2O2 motif. The complex displays C—H⋯Cl inter­actions involving the H atoms of the heterocycle backbone and the chloride ligands of a neighbouring mol­ecule.

【 授权许可】

CC BY