Metal Oxygen Connectivities in Cu(II) Complexes of Meso-2,3-dibromosuccinic Acid (H2DBrS): [Cu3(H2O)2(μ3-OH)2(μ2-OAc)2(DBrS)]•4H2O 1 and [Cu3(H2O)4(DBrS)2](DBrSM)•4H2O 2

Two metal oxygen connectivities Cu(II) complexes [Cu-3(H2O)(2) (mu(3)-OH)(2)(mu(2)-OAc)(2)(DBrS)]center dot 4H(2)O 1 and [Cu-3(H2O)(4)(DBrS)(2)](DBrSM)center dot 4H(2)O 2 have been synthesized (H2DBrS = HOOC-(CHBr)(2)-COOH, DBrSM = (3aR, 6aS)-3a, 6a-dibromo-3,6-dioxohexahydrofuro[3,4-c] furan-1,4-bis(olate)). Within 1, two CuO5 square pyramid are edge-shared to generate di-square pyramids, each of which are corner-shared to one another CuO6 octahedron to form polyhedral copper oxygen chains. The resulted polynuclear single chains are bridged by meso-2,3-dibromossuccinate anions to generate 2D layers. Compound 2 features a trimer polyhedrons unit with two CuO5 square pyramid and CuO6 octahedron, which are further interconnected by meso-2,3-dibromossuccinate anions into 3D coordination polymer. The study of magnetic property indicates that antiferromagnetic coupling interactions exist between the adjacent Cu(II) ions.