Unusual perchlorate binding in heptacoordinated cadmium(II)thiocyanate containing a pentadentate Schiff base
摘要:
A new Schiff base, N,N'-(bis(pyridin-2-yl)benzylidene)diethylenetriamine (bpbd), has been used to synthesise a novel heptacoor dinated cadmium(II)thiocyanate complex [Cd(bpbd)(NCS)(ClO4)] (1) Crystal structure analysis of 1 reveals cadmium(II) centre in a distorted pentagonal bipyramid environment with perchlorate binding, C-H center dot center dot center dot O hydrogen bonding and C-H center dot center dot center dot pi interaction leading to a 2D sheet. 1 displays intraligand (1)(pi-pi*) fluorescence and intraligand (3)(pi-pi*) phosphorescence in glassy solutions (MeOH at 77 K). (C) 2005 Elsevier B.V. All rights reserved.