Two Copper Coordination Polymers with Cage-Like 12-MC-4 Metallacrown and Linear Trinuclear Structures

Two novel coordination polymers {[Cu-4(H(2)dam-dap)(4)(ClO4)(2)]center dot 2ClO(4)}(n) (1) and [Cu-3(H(2)dam-dap)(2)(N-3)(2)(NO3)(2)](n) (2) have been obtained through the copper salts and 3-(3-Amino-propylimino)-butan-2-one oxime (H(3)dam-dap) ligand, which was synthesized by one-pot reaction in the preparation process of complexes. Single-crystal X-Ray analysis shows that complex 1 displays a cage-like 12-MC-4 metallacrown structural unit with the sides exhibiting Cu-N-O repeat units, and the cage-like structures have been linked into one 1D chain by the bridges of ClO4- anions; 2 possesses trinuclear [Cu-3(H(2)dam-dap)(2)](4+) unit with three Cu ion locating in a linear arrangement, and the adjacent trinuclear units are linked into a 2D coordination polymer by bridging nitrate anions. Magnetic studies reveal that 1 displays ferromagnetic coupling between metal centres, and 2 exhibits antiferromagnetic interaction and field-induced frequency-dependent behavior.