Article ID Journal Published Year Pages File Type
1238165 Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 2008 5 Pages PDF
Abstract

A tri-nuclear cobalt(II) cluster, [(CoL)2(OAc)2Co]·2C2H5OH, has been synthesized by the reaction of cobalt(II) acetate tetrahydrate with a novel Salen-type bisoxime chelating ligand, 3,3′-dimethoxy-2,2′-[ethylenedioxybis(nitrilomethylidyne)]diphenol (H2L), and characterized by elemental analyses, IR spectra, TG-DTA and molar conductances. UV–vis spectroscopic titration in methanol solution clearly indicated the exclusive formation of the 3:2 [Co3L2]2+ cluster. The single-crystal X-ray diffraction determination of the Co(II) cluster shows that there are two acetate ions coordinate to three cobalt(II) ions through Co–O–C–O–Co bridges, and quadruple μ-phenoxo oxygen atoms from two [CoL] chelates also coordinate to cobalt(II) ions. Interestingly, different conformational central ions: five- and six-coordinated geometries were found in the cluster.

Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry
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