Synthesis and characterization of a tetranuclear copper(II) complex with a chiral Schiff base ligand

The title complex l-[Cu-4(II)(Hvap)(2)(vap)(2)(MeOH)(2)](CIO4)(2) 1 has been synthesized and characterized by EA, IR, TGA, solid-state CD spectra and X-ray single-crystal analyses (I-H(2)vap: a Schiff base ligand derived from the condensation of o-vanillin and l-2-amino-3-phenyl-1-propanol). Complex 1 crystallizes in monoclinic system, chiral space group P2(1) with a = 10.4257(18), b = 21.695(4), c = 15.721(3) angstrom, beta = 94.443(3)degrees, V = 3545.1(11) angstrom(3), Z = 2, Cu4C70H78N4O22Cl2, Mr = 1652.42, D-c = 1.548 g/cm(3), F(0 0 0) = 1704 and mu(MoK alpha) = 1.338 mm(-1). The final R = 0.0682 and wR = 0.1420 for 6170 observed reflections with I > 2 sigma-(I) and R = 0.1775 and wR = 0.1830 for all data. The structure of complex 1 contains a boat-shaped {Cu4O4} motif. The solid-state CD spectra confirm the chiral nature of complex 1. (C) 2012 Hua Xiang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.