A tetracopper(II) complex of 4,6-dimethyl-2-hydroxy-isophthalic acid comprising a dimer of dinuclear subunits

The dinucleating ligand 4,6-dimethyl-2-hydroxy-isophthalic acid, H3L, forms the tetracopper(II) complex Cu4L2(O2CCH3)2(py)4(CH3OH)2, 1. The single crystal X-ray structure of 1 · 2CH3OH reveals that this complex is a carboxylate bridged dimer of dinuclear copper(II) subunits, in which the copper(II) centres adopt square-based pyramidal geometries.