title: A novel two-dimensional framework based on unprecedented cadmium(II) chains.
abstract: The bent ligand 4-[(1H-1,2,4-triazol-1-yl)methyl]benzoic acid (HL) has been used to create the novel two-dimensional coordination polymer poly[mu(2)-aqua-mu(2)-chlorido-{mu(2)-4-[(1H-1,2,4-triazol-1-yl)methyl]benzoato}cadmium(II)], [Cd(C(10)H(8)N(3)O(2))Cl(H(2)O)](n), under hydrothermal reaction of HL with cadmium chloride. The crystallographically unique Cd atom is seven-coordinated in an approximately pentagonal-bipyramidal environment of two carboxylate O atoms, two water O atoms, two Cl atoms and one triazole N atom. A notable feature is the presence of zigzag ...Cd...Cd... inorganic chains, in which neighboring Cd(II) ions are doubly bridged by pairs of mu(2)-Cl atoms and mu(2)-H(2)O ligands in an alternating fashion. To the authors' knowledge, this is the first example containing this bridging mode in a cadmium(II) framework. The chains are connected to one another through the bridging L(-) ligand into a two-dimensional undulating network. All of the two-dimensional nets stack exactly together in an ...AA... stacking sequence along the crystallographic b axis. Neighboring layers are further linked into a three-dimensional framework via interlayer hydrogen-bonding interactions.
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, People's Republic of China.
authors.forename: Jie
authors.initials: J
authors.lastname: Qin
authors.forename: Jian Ping
authors.initials: JP
authors.lastname: Ma
authors.forename: Li Li
authors.initials: LL
authors.lastname: Liu
authors.forename: Ru Qi
authors.initials: RQ
authors.lastname: Huang
authors.forename: Yu Bin
authors.initials: YB
authors.lastname: Dong