Bis{µ-2-[(pyridin-2-yl)imino-meth-yl]phenolato}bis-[(2-formyl-phenolato)copper(II)].

The asymmetric unit of the title compound, [Cu(2)(C(12)H(9)N(2)O)(2)(C(7)H(5)O(2))(2)], contains two independent (2-formyl-phen-olato){2-[(pyridin-2-yl)imino-meth-yl]phenolato}copper(II) mol-ecules that form pseudocentrosymmetric dimers via inter-actions between the Cu and pyridyl N atoms of independent monomers. The square-planar geometry of the Cu atoms in the monomer thus becomes square-based pyramidal in the dimer. The crystal studied was an inversion twin, with unequal populations of 0.353 (17) and 0.647 (17).

Tetra-µ-acetato-κO:O'-bis-[(2-amino-3,5-dichloro-pyridine-κN)copper(II)](Cu-Cu).

The title binuclear Cu(II) complex, [Cu(2)(CH(3)CO(2))(4)(C(5)H(4)Cl(2)N(2))(2)], is disposed about a crystallographic inversion center, located at the mid-point of the Cu-Cu connecting line. The Cu⋯Cu distance is 2.6600 (6) Šand each metal atom exhibits a Jahn-Teller-distorted octa-hedral geometry.