Self-assembly of organooxotin(IV) clusters with Schiff-base-containing-triazole from hydrolysis or solvothermal synthesis:: Crystal structures, hydrogen bonds, C-H...π stacking and S...S interaction

Eight new organostannoxane-based multiredox assemblies containing-Schiff-base-triazole ligand peripheries have been readily synthesized by hydrolysis or solvothermal synthetic routes. The reactions of the diorganotin dichloride with the Schiff-base-containing-triazole ligand afford the following types: [(Me2Sn)(2)O-2(Ln)](2) (n = 1, for 1) [(Me2Sn)(2)O(RO)(Ln)](2) (R= Et, n = 2, for 2; R = Me, n = 3, for 3), [(n-Bu2Sn)(2)O-2(Ln)](2) (n = 1, for 4; n = 2, for 5; n = 3, for 6) and [(Me2Sn)(2)Ln2O](2) center dot L (n = 2; L H2O for 7, L = CH3OH for 8). All the complexes were characterized by elemental analysis, IR,H-1, C-13 and Sn-119 spectra analyses. Except for complexes 4 and 6, the other complexes are also characterized by X-ray crystallography diffraction analyses. Complexes 1-3 and 5 show similar structures containing a Sn4O4 ladder-shaped skeleton in which the N atom from a corresponding thione-form deprotonated Schiff base coordinated to the exo tin atoms in monodentate chelating agent. Complex 7 and 8 show a novel framework containing a Sn2O2 symmetrical core with two N atoms from triazole moiety coordinated to tin atoms. Weak but significant intermolecular hydrogen bondings, C-H... pi stacking or non-bonded S ... S interaction lead to aggregation and self-assembly of these complexes into 1D, 2D or 3D supramolecular frameworks. (c) 2007 Elsevier B.V. All rights reserved.