title: A coordination polymer of CdCl2 with the novel zwitterionic dicarboxylate ligand 2,2'-(2-methylbenzimidazolium-1,3-diyl)diacetate (pda).
abstract: The title compound, poly[chlorido[mu(4)-2,2'-(2-methylbenzimidazolium-1,3-diyl)diacetato]cadmium(II)], [Cd(C(12)H(11)N(2)O(4))Cl](n), is an undulating two-dimensional polymer consisting of a paddlewheel Cd(2)(CO(2))(4) cluster which lies on an inversion centre. These paddlewheel clusters act as four-connected square building units interlinked via bridging zwitterionic dicarboxylate ligands into a corrugated layer which is consolidated by pi-pi interactions between benzene rings of benzimidazole groups. Neighbouring layers are further assembled via interlayer pi-pi interactions into a three-dimensional supramolecular structure. The key feature of this study is the synthesis of a paddlewheel-based polymer constructed with a novel multifunctional zwitterionic dicarboxylate ligand.
authors.affiliation: School of Chemistry and Chemical Engineering, Guangxi Normal University, Guilin 541004, People's Republic of China.
authors.forename: Liu Cheng
authors.initials: LC
authors.lastname: Gui
authors.forename: Fa Si
authors.initials: FS
authors.lastname: Li
authors.forename: Zhong Min
authors.initials: ZM
authors.lastname: Cen
authors.forename: Xiu Jian
authors.initials: XJ
authors.lastname: Wang
authors.forename: Bin
authors.initials: B
authors.lastname: Li