Synthesis, characterization and crystal structure of binuclear diorganotin(IV) complexes derived from hexadentate diacylhydrazone ligands
摘要:
Six new diorganotin(IV) complexes of the type (R(2)Sn)(2)L (L = L1 R = Me 1, nBu 2; L = L2 R = Me 3, nBu 4; L = L3 R = Me 5, nBu 6) have been obtained by the reaction of new hexadentate diacylhydrazone ligands H(4)L1 [bis(2-hydroxybenzaldehyde)terephthalohydrazone], H(4)L2 [bis(2-hydroxy-3-methoxybenzaldehyde)terephthalohydrazone] or H(4)L3 [bis(2-hydroxy-1-naphthaldehyde)terephthalohydrazone] with diorganotin(IV) dichloride in the presence of sodium ethoxide. All the diacylhydrazones and the complexes were characterized by elemental analysis, IR and NMR spectra. Complexes 2, 4, 5 and 6 were also characterized by X-ray crystallography diffraction analysis which revealed that the complexes have similar structures containing binuclear diorganotin(IV) skeletons. Furthermore weak but significant intermolecular Sn center dot center dot center dot O bonds, hydrogen bonds, C-H center dot center dot center dot pi stacking or pi center dot center dot center dot pi it stacking lead to aggregation and assembly of these complexes into 1D, 2D or 3D supramolecular frameworks. (C) 2008 Elsevier Ltd. All rights reserved.