Tetrakis(μ-2-methylbenzoato)bis[(2-methylbenzoic acid)copper(II)]

In the title centrosymmetric dinuclear compound, [Cu-2(C8H7O2)(4)(C8H8O2)(2)], four o-toluate anions form a cage around two Cu atoms in a syn-syn configuration. Two more o-toluic acid molecules are apically bonded to the Cu atoms, which show a square-pyramidal coordination geometry. The acid H atoms are hydrogen bonded to the cage carboxyl O atoms [O center dot center dot center dot O = 2.660 (2) angstrom]. The molecular packing forms a puckered pseudo-hexagonal close-packed layer in the (h00) plane, with soft intermolecular H center dot center dot center dot H contacts (2.46-2.58 angstrom).