Synthesis and Crystal Structures of New Nickel(II) and Manganese(II) Coordination Polymers Containing 5-benzimidazolecarboxylate Ligand

Two coordination polymers of [Ni(BImC) 2]n(1) and [Mn(BImC) 2]n(2) (BImC=5-benzimidazolecarboxyla-te) have been hydrothermally prepared by the reaction of M(CH3COO) 2·4H2O(M=Ni,Mn) and HBImC,and char-acterized by IR and single crystal X-ray diffraction structural analyses.1 crystallizes in the orthorhombic system,and the space group is Pbcn,with the crystal cell parameters a=1.234 1(4) nm,b=1.519 2(5) nm,c=1.516 7(5) nm,and V=2.843 6(17) nm3,Z=8,R1=0.046 7,wR2=0.103 5.2 crystallizes in the monoclinic system with space group P21/c,a=1.747 3(6) nm,b=0.387 84(14) nm,c=2.242 4(8) nm,β=112.556(4) °,V=1.403 4(9) nm3,Z=4,R1=0.042 8,wR2=0.103 0.Complex 1 displays a distorted(4,4) two-dimensional layer structure.Complex 2 shows a three-dimensional network formed from one-dimensional chains by N-H…O hydrogen bonding interactions.CCDC:694934,1;694935,2.