Anionic effects on the formation of tridentate 4′-chloro-2,2′:6′,2″-terpyridine copper(II) complexes having 1:1 or 1:2 ratio of metal and ligand and their crystal symmetry
作者:Wei Huang、Wei You、Li Wang、Cheng Yao
DOI:10.1016/j.ica.2008.09.046
日期:2009.5
A facile synthetic procedure has been used to prepare one five-coordinate and four six-coordinate copper(II) complexes of 4'-chloro-2,2':6',2 ''-terpyridine (tpyCl) ligand with different counterions (SO(4)(2-), NO(3)(-), BF(4)(-), PF(6)(-), and ClO(4)(-)) in high yields. They are formulated as [Cu(tpyCl-kappa(3)N,N',N '')(SO(4)-kappa O)(H(2)O-kappa O)] center dot 2H(2)O (1), trans-[Cu(tpyCl-kappa(3)N,N',N '')(NO(3)-kappa O)(2)(H(2)O-kappa O)](2), [Cu(tpyCl-kappa(3)N,N',N '')(2)](BF(4))(2) (3), [Cu(tpyCl-kappa(3)N,N',N '')(2)](PF(6))(2) (4) and [Cu(tpyCl-kappa(3)N,N',N '')(2)](ClO(4))(2) (5) and versatile interactions in supramolecular level including coordinative bonding, O-H center dot center dot center dot O, O-H center dot center dot center dot Cl, C-H center dot center dot center dot F, and C-H center dot center dot center dot Cl hydrogen bonding, pi-pi stacking play essential roles in forming different frameworks of 1-5. It is concluded that the difference of coordination abilities of the counterions used and the experimental conditions codominate the resulting complexes with 1:1 or 1:2 ratio of metal and ligand. (c) 2008 Elsevier B.V. All rights reserved.