title: A noncentrosymmetric 3D coordination polymer of metallocalix[4]arene.
abstract: Sequential reaction of a lower-rim functionalized calix[4]arene, 25,27-bis(hydroxycarbonylmethoxy)-26,28-dimethoxy-p-tert-butylcalix[4]arene (H(2)L(C4)), with K(2)CO(3) and CoCl(2).6H(2)O in ethanol afforded a 3D coordination polymer [K(3)Co(2)(L(C4))(3)(EtOH)(6)]Cl (1). X-ray crystal analysis revealed that 1 features a noninterpenetrated (10,3)-a net structure wherein octahedral Co(2+) ions serve as the three-connecting nodes and [K(L(C4))](-) units function as the bridges between the Co(2+) ions. The calixarene ligands in 1 adopt a 1,3-alternate conformation, and there are considerable cation-pi interactions between the K(+) ion and the phenyl rings within each [K(L(C4))](-) unit.
authors.affiliation: Coordination Chemistry Institute, The State Key Laboratory of Coordination Chemistry, Nanjing University, 210093 Nanjing, P. R. China.
authors.forename: Yu-Juan
authors.initials: YJ
authors.lastname: Liu
authors.forename: Jie-Sheng
authors.initials: JS
authors.lastname: Huang
authors.forename: Stephen Sin-Yin
authors.initials: SS
authors.lastname: Chui
authors.forename: Cheng-Hui
authors.initials: CH
authors.lastname: Li
authors.forename: Jing-Lin
authors.initials: JL
authors.lastname: Zuo
authors.forename: Nianyong
authors.initials: N
authors.lastname: Zhu
authors.forename: Chi-Ming
authors.initials: CM
authors.lastname: Che