Acta Crystallographica Section C

Crystal Structure Communications

Volume 60, Part 12 (December 2004)

fg1771 scheme

Acta Cryst. (2004). C60, m628-m630 [doi:10.1107/S0108270104026459]

The copper(II) complexes di--bromo-bis{[2,6-bis(pyrazol-1-yl)pyridine]perchloratocopper(II)} and [2,6-bis(pyrazol-1-yl)pyridine]dibromocopper(II)

S. Chakrabarty, R. K. Poddar, R. D. Poulsen, A. L. Thompson and J. A. K. Howard

Abstract: The two title compounds, di- [bold mu] -bromo-bis{[2,6-bis(pyrazol-1-yl- [bold kappa] N²)pyridine-N](perchlorato-O)copper(II)}, [Cu₂Br₂(ClO₄)₂(C₁₁H₉N₅)₂], (I), and [2,6-bis(pyrazol-1-yl)pyridine]dibromocopper(II), [CuBr₂(C₁₁H₉N₅)], (II), were synthesized by only slight modifications of the same reaction; compound (II) was formed by adding one molar equivalent of pyrazole (C₃N₂H₄) to the reaction mixture of (I). Compound (I) is a bromo-bridged dinuclear copper(II) compound stabilized by weak interactions with the perchlorate anions (ClO₄^-), while (II) is a related mononuclear species, which has a distorted square-pyramidal geometry.

Formula: [Cu₂Br₂(ClO₄)₂(C₁₁H₉N₅)₂] and [CuBr₂(C₁₁H₉N₅)]

Online 11 November 2004


	Structure factor file (CIF format) (485.4 kbytes) Contains datablock I

	Structure factor file (CIF format) (229.0 kbytes) Contains datablock II

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