Synthesis, characterization and structural studies of mixed-ligand di-n-butyltin alkanesulfonate derivatives, [n-Bu2Sn(X)OS(O)2R]2 [R=Et, n-Pr; X=acac, 4-OMe–O2CC9H5N-2, O2CC9H6N-2, O2CC9H6N-1]
作者:Ravi Shankar、Atul Pratap Singh、Geeta Hundal、Raymond J. Butcher
DOI:10.1016/j.jorganchem.2007.08.045
日期:2007.12
A number of stable mixed-ligand di-n-butyltin alkanesulfonates, [n-Bu2Sn(acac)OS(O)(2)R](2) [R = Et (1), n-Pr (2)] as well as [n-Bu2Sn(X)OS(O)(2)Et](2) [X = 4-OMC-O2CC9H5N-2 (3), O2CC9H6N-2 (4), O2CC9H6N-1 (5) bearing a chelating co-ligand have been synthesized by reacting equimolar quantities of n-Bu2Sn(OR)OS(O)(2)R (R = Et (1a) or n-Pr (1b)) with acetylacetone or 4-methoxy-2-quinoline/2-quinoline/1-isoquinoline carboxylic acid in dichloromethane/acetonitrile under mild conditions (rt, 10-12 h). The crystal structures of 1-3 reveal dimeric structural motif in each case by virtue of bridging bidentate mode of the ethane/propanesulfonate groups with distorted. octahedral geometry around the tin atoms. The bonding between tin and the alkanesulfonate groups is largely covalent (2.2-2.3 angstrom) irrespective of the nature of the co-ligand. (C) 2007 Elsevier B.V. All rights reserved.