Heterometallic mixed-valence complex with a {Co<sup>II</sup>Co<sup>III</sup>Cu<sub>2</sub>O<sub>4</sub>} core as a new type of cobalt-based oxide cubane

<p>A tetranuclear heterometallic complex formulated as [Co<sub>2</sub>Cu<sub>2</sub>(L)<sub>3</sub>(ea)(H<sub>2</sub>O)(NCS)<sub>2</sub>], where H<sub>2</sub>L = 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 {Co<sup>II</sup>Co<sup>III</sup>M<sub>2</sub>} type of cobalt-based oxide cubane complex according to the classification which has been made via CSD structural analysis.</p>