Synthesis and Crystal Structure of a Novel Manganese Coordination Polymer Constructed by 3,5-Dimethylbenzoic Acid with 4,4'-Bipyridine

A novel manganese coordination polymer [Mn(L)2(bipy)]n (HL = 3,5-dimethylben- zoic acid, 4,4′-bipy = 4,4′-bipyridine) has been synthesized by a hydrothermal method. The molecular and crystal structures were determined by single-crystal X-ray diffraction. The crystal is of monoclinic, space group C2/c with a = 2.0996(8), b = 1.1835(5), c = 0.9958(4) nm, β = 110.161(5)o, V = 2.3229(16) nm3, Z = 4, C28H26MnN2O4, Mr = 509.45, Dc = 1.457 g/cm3, μ = 0.607 mm-1, F(000) = 1060, Rint = 0.0566, R = 0.0334 and wR = 0.1078. In the crystal the manganese atom is six-coordinated by two nitrogen atoms from 4,4′-bipy and four oxygen atoms from 3,5-dimethylbenzolate molecules, completing an octahedral geometry. The 4,4′-bipy molecules bridge the infinite chain [Mn(L)2(bipy)]n to form a two-dimensional layer.