A noncentrosymmetric 3D coordination polymer of metallocalix[4]arene.
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.
Liu
Yu-Juan
YJ
Coordination Chemistry Institute, The State Key Laboratory of Coordination Chemistry, Nanjing University, 210093 Nanjing, P. R. China.
Huang
Jie-Sheng
JS
Chui
Stephen Sin-Yin
SS
Li
Cheng-Hui
CH
Zuo
Jing-Lin
JL
Zhu
Nianyong
N
Che
Chi-Ming
CM