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

The title complex l-[CuII4(Hvap)2(vap)2(MeOH)2](ClO4)21 has been synthesized and characterized by EA, IR, TGA, solid-state CD spectra and X-ray single-crystal analyses. Complex 1 contains a boat-shaped {Cu4O4} motif. The solid-state CD spectra confirm the chiral nature of complex 1. The title complex l-[CuII4(Hvap)2(vap)2(MeOH)2](ClO4)21 has been synthesized and characterized by EA, IR, TGA, solid-state CD spectra and X-ray single-crystal analyses (l-H2vap: 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 P21 with a=10.4257(18), b=21.695(4), c=15.721(3)Å, β=94.443(3)°, V=3545.1(11)Å3, Z=2, Cu4C70H78N4O22Cl2, Mr=1652.42, Dc=1.548g/cm3, F(000)=1704 and μ(MoKα)=1.338mm−1. The final R=0.0682 and wR=0.1420 for 6170 observed reflections with I>2σ(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.