Acta Cryst. (2009). E65, m1262-m1263  [ doi:10.1107/S1600536809038331 ]

Poly[(₃-5-bromonicotinato)(5-bromonicotinato)copper(II)]

J. Yang and H.-J. Chen

Abstract: The title coordination polymer, [Cu(C₆H₃BrNO₂)₂]_n, is composed of two structurally similar two-dimensional coordination polymers (twin layers). Both of them have the same chemical composition but they display different bond lengths and angles. In each layer, two N atoms and four carboxylate O atoms from the bridging 5-bromonicotinate ligands and four carboxylate O atoms from the terminal 5-bromonicotinate ligands bind to two Cu^II atoms to form a dinuclear paddle-wheel-like pattern. Adjacent paddle wheels are further linked by bridging 5-bromonicotinate groups to generate a two-dimensional coordination polymer; neighboring twin-like layers are finally stacked through - stacking interactions between adjacent pyridine rings [perpendicular distance of 3.626 (2) Å] in a `sandwich' manner, thus generating a three-dimensional supramolecular structure.

Online 30 September 2009

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