A novel two-dimensional cadmium(II) complex: poly[diaquatris(μ4-cyclohexane-1,4-dicarboxylato)bis[2-(pyridin-4-yl)-1H-benzimidazole]tricadmium(II).
The title compound, [Cd3(C8H10O4)3(C12H9N3)2(H2O)2]n or [Cd3(chdc)3(4-PyBIm)2(H2O)2]n, was synthesized hydrothermally from the reaction of Cd(CH3COO)2·2H2O with 2-(pyridin-4-yl)-1H-benzimidazole (4-PyBIm) and cyclohexane-1,4-dicarboxylic acid (1,4-chdcH2). The asymmetric unit consists of one and a half Cd(II) cations, one 4-PyBIm ligand, one and a half 1,4-chdc(2-) ligands and one coordinated water molecule. The central Cd(II) cation, located on an inversion centre, is coordinated by six carboxylate O atoms from six 1,4-chdc(2-) ligands to complete an elongated octahedral coordination geometry. The two terminal rotationally symmetric Cd(II) cations each exhibits a distorted pentagonal-bipyramidal geometry, coordinated by one N atom from 4-PyBIm, five O atoms from three 1,4-chdc(2-) ligands and one O atom from an aqua ligand. The 1,4-chdc(2-) ligands possess two conformations, i.e. e,e-trans-chdc(2-) and e,a-cis-chdc(2-). The cis-1,4-chdc(2-) ligands bridge the Cd(II) cations to form a trinuclear {Cd3}-based chain along the b axis, while the trans-1,4-chdc(2-) ligands further link adjacent one-dimensional chains to construct an interesting two-dimensional network.
College of Chemistry and Chemical Engineering, Fujian Normal University, Fuzhou, Fujian 350007, People's Republic of China.
Xiu Hong
XH
Yang
College of Chemistry and Chemical Engineering, Fujian Normal University, Fuzhou, Fujian 350007, People's Republic of China.
Ming Xing
MX
Yang
College of Chemistry and Chemical Engineering, Fujian Normal University, Fuzhou, Fujian 350007, People's Republic of China.
Li Juan
LJ
Chen
College of Chemistry and Chemical Engineering, Fujian Normal University, Fuzhou, Fujian 350007, People's Republic of China.
Jing
J
Guo
College of Chemistry and Chemical Engineering, Fujian Normal University, Fuzhou, Fujian 350007, People's Republic of China.
Shen
S
Lin
D001562:Benzimidazoles / Q000737:chemistry*; D002104:Cadmium / Q000737:chemistry*; D056831:Coordination Complexes / Q000138:chemical synthesis* / Q000737:chemistry; D018360:Crystallography, X-Ray; D003510:Cyclohexanes / Q000737:chemistry*; D006860:Hydrogen Bonding; D008024:Ligands; D015394:Molecular Structure
D001562:Benzimidazoles; D056831:Coordination Complexes; D003510:Cyclohexanes; D008024:Ligands; C000600111:trans-dibromidobis(2,2-dimethylpropane-1,3-diamine-kappa(2)N,N')chromium(III) perchlorate; D002104:Cadmium; C506365:Cyclohexane
cadmium complex; crystal structure; dicarboxylate; metal-organic framework; two-dimensional coordination polymer