Metal Oxygen Connectivities in Cu(II) Complexes of Meso-2,3-dibromosuccinic Acid (H 2 DBrS): [cu 3 (H 2 O) 2 ( Μ 3 –OH) 2 ( Μ 2 –oac) 2 (dbrs)]⋅4h 2 O 1 and [cu 3 (H 2 O) 4 (dbrs) 2 ](dbrs M )⋅4H 2 O 2

Two metal oxygen connectivities Cu(II) complexes [Cu3(H2O)2(μ 3–OH)2(μ 2–OAc)2(DBrS)]⋅4H2O 1 and [Cu3(H2O)4(DBrS)2](DBrSM)⋅4H2O 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.