NZOATO)-MU-(2-DIMETHYLAMINOETHANOLATO)-COPPER(II)]

A cubane-type Cu4O4 core has been found in the title tetrameric copper (II) complex {tetrakis(mu-3-bromobenzoato)-1 kappa O:2 kappa O';2 kapp a O:3 kappa O';3 kappa O:4 kappa O';4 kappa O:1 kappa O'-tetrakis [mu- 2-(dimethylamino)ethanolato]-1 kappa N,1:2:3 kappa(3)O;2 kappa N,2:3:4 kappa(3)O;3 kappa N,3:4:1 kappa(3)O;4 kappa N,4:1:2 kappa(3)O-tetraco pper(II), [Cu-4(C7H4BrO2)(4)(C4H10NO)(4)]} The short Cu-O-ethanolato b onds form an eight-membered ring folded in a boat-like conformation. T he Cu Cu distances vary between 3.121 (2) and 3.796 (3) Angstrom. Each Cu atom has a distorted octahedral environment. Two ethanolato O atom s, a carboxy O atom and an amino N atom form the equatorial coordinati on plane, with Cu-O bond lengths in the range 1.914 (12)-1.954 (14) An gstrom and Cu-N bond lengths in the range 2.011 (12)-2.057 (13) Angstr om. The axial sites are occupied by an ethanolato O atom and an O atom of the carboxylate group, with Cu-O distances in the range 2.443 (8)- 2.877 (9) Angstrom.