Gravar-mail: Di-μ(2)-acetato-1:2κ(2) O:O′;2:3κ(2) O:O′-bis­{μ(2)-4,4′-dichloro-2,2′-[2,2-dimethyl­propane-1,3-diylbis(nitrilo­methanylyl­idene)]diphenolato}-1:2κ(6) O,N,N′,O′:O,O′;2:3κ(6) O,O′:O,N,N′,O′-tricopper(II)