Crystal structure of bis-(μ2-4-tert-butyl-2-formyl-phenolato)-1:2κ(3) O (1),O (2):O (1);3:4κ(3) O (1),O (2):O (1)-bis-(4-tert-butyl-2-formyl-phenolato)-2κ(2) O (1),O (2);4κ(2) O (1),O (2)-di-μ3-methoxido-1:2:3κ(3) O;1:3:4κ(3) O-di-μ2-methoxido-1:4κ(2) O;2:3κ(2) O-tetra-copper(II).

The structure of the title compound, [Cu4(CH3O)4(C11H13O2)4], consists of dimeric dinuclear copper(II) complexes oriented around a centre of inversion. Within each dinuclear fragment, the two Cu(II) atoms are in a distorted square-planar coordination sphere. Two neighbouring fragments are linked by four apical Cu-O contacts, yielding an overall square-pyramidal coordination environment for each of the four Cu(II) atoms. The mol-ecules are arranged in layers parallel to (101). Non-classical C-H⋯O hydrogen-bonding inter-actions are observed between the layers.