The anion of the title compound, (C11H24Cl2N4O2)(2)-[Cu4OCl10], contai
ns a tetrahedral oxide ion coordinated to four Cu-II ions. Each Cu-II
ion is in turn coordinated to one terminal and three bridging Cl ions,
giving rise to a symmetrical polynuclear cluster. The cation is a dip
rotonated tetraamine where the central methylene protons have been dis
placed by Cl ions.