Synthesis and Characterization of a Novel Coordination Polymer {[Mn(L)(Phen)2] • 2H2O}n

A novel coordination polymer {[Mn(L)(Phen)(2)] center dot 2H(2)O}(n) (I) has been synthesized by the reaction of Mn(CH3COO)(2), 2,2'-bipyridine-5,5'-dicarboxylic acid (HL) and 1,10-phenanthroline (Phen). The structure of the complex was charactered by single-crystal X-ray diffractometry. The unit cell parameters for complex I: a = 11.796(3), b = 17.837(5), c = 15.081(4) angstrom; beta = 101.804(5)degrees; V = 3106.0(15) angstrom(3); Z = 4; space group C2/c. The Mn(II) atom is coordinated by four nitrogen atoms from two Phen molecules and two oxygen atoms from two molecules L with a distorted octahedral geometry. Complex was dibridged by the L ligand forming a 1D infinite chain. Intramolecular weak interactions, such as hydrogen bonds and pi center dot center dot center dot pi-stacking, were found in the title complex, and 3D supramolecular framework was constructed by intermolecular weak interactions mentioned above.