Heterometallic mixed-valence complex with a {CoIICoIIICu2O4} core as a new type of cobalt-based oxide cubane

A tetranuclear heterometallic complex formulated as [Co2Cu2(L)3(ea)(H2O)(NCS)2], where H2L = 2-((2-hydroxyethyl)iminomethyl)-phenol and Hea = 2-aminoethanol, has been obtained by self-assembly and characterized by single crystal X-ray diffraction. The crystal structure of the complex represents a new {CoIICoIIIM2} type of cobalt-based oxide cubane complex according to the classification which has been made via CSD structural analysis.