Tetrakis(μ₂-2,2-dimethylpropanoato-κ²O,O′)bis[(pyridine-κN)copper(II)]

Abstract

The title compound, [Cu2(C5H9O2)4(C5H5N)2], consists of centrosymmetric binuclear cage units with four dimethyl­propanoate bridges linking the two Cu centres [Cu⋯Cu = 2.6229 (9) Å]. The square‐pyramidal Cu coordination is completed by a pyridine N atom at the apical site. A π–π stacking inter­action helps to consolidate the crystal packing.

Tetrakis(μ2-2,2-dimethylpropanoato-κ2O,O′)bis[(pyridine-κN)copper(II)]: a monoclinic polymorph

“…The final position in the disordered octahedral trans-CuNO 4 donor set is occupied by a pyridine-N atom in each case. The structure resembles closely that described for the triclinic polymorph but with the latter being disposed about a centre of inversion (Blewett et al, 2006). The primary differences between the molecules is found in the relative disposition of the pyridine groups.…”