Catena-Poly[[bis(μ-5-bromopyridine-3-carboxylato-κ2O:O′)dicopper(II)]-bis(μ-5-bromopyridine-3-carboxylato)-κ3O,O′:N;κ3N:O,O′

Paul Deburgomaster,Jon Zubieta

doi:10.1107/s160053681004242x

Abstract

The title compound [Cu2(C6H3BrNO2)4]n, forms sheets in the bc plane. The structure features the dinuclear paddle-wheel cage motif common to copper(II) carboxylates. The polymeric structure is achieved through bridging between binuclear units by the pyridyl donors of two of the four carboxylates of the cage. Each cage engages in axial bonding at each copper atom to a pyridyl nitrogen donor and extends two 5-bromopyridine-3-carboxylate groups to bridge to adjacent binuclear sites in the bc plane. Each cage is linked to four adjacent cages in the plane. The intradimer Cu⋯Cu distance is 2.6465 (5) Å. The remaining 5-bromopyridine-3-carboxylate groups project into the interlamellar domain and interdigitate in pairs from each neighboring layer.

Highlights

The title compound [Cu2(C6H3BrNO2)4]n, forms sheets in the bc plane
The polymeric structure is achieved through bridging between binuclear units by the pyridyl donors of two of the four carboxylates of the cage
Each cage engages in axial bonding at each copper atom to a pyridyl nitrogen donor and extends two 5-bromopyridine3-carboxylate groups to bridge to adjacent binuclear sites in the bc plane

Summary

Paul DeBurgomaster and Jon Zubieta*

Key indicators: single-crystal X-ray study; T = 90 K; mean (C–C) = 0.003 Å; R factor =. 0.021; wR factor = 0.054; data-to-parameter ratio = 18.8. The title compound [Cu2(C6H3BrNO2)4]n, forms sheets in the bc plane. The structure features the dinuclear paddle-wheel cage motif common to copper(II) carboxylates. The polymeric structure is achieved through bridging between binuclear units by the pyridyl donors of two of the four carboxylates of the cage. Each cage engages in axial bonding at each copper atom to a pyridyl nitrogen donor and extends two 5-bromopyridine3-carboxylate groups to bridge to adjacent binuclear sites in the bc plane. Each cage is linked to four adjacent cages in the plane. The remaining 5-bromopyridine-3-carboxylate groups project into the interlamellar domain and interdigitate in pairs from each neighboring layer

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Data collection

Paul DeBurgomaster and Jon Zubieta

Special details