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| Title: | Disproportionation reactions of (methoxy/hydroxy)diorganotin(IV) methanesulfonates with carboxylic acids: Synthesis and structure of new diorganotin(IV) carboxylates |
| Authors: | Shankar, Ravi
Mukesh Kumar
Narula, Suraj P
Chadha, Raj K |
| Keywords: | Disproportionation
Carboxylates
Diorganotin
Trinuclear tin |
| Issue Date: | 2003 |
| Citation: | Journal of Organometallic Chemistry, 671(1-2), 35-42 |
| Abstract: | Disproportionation reactions between equimolar quantities of R2Sn(X)OSO2Me [X=OMe or OH] and ethylmalonic/maleic acid in acetonitrile under mild conditions afford new diorganotin dicarboxylates, R2Sn(O2CR′COOH)2 [R′=CHEt, R=n-Pr (3a), n-Bu (3b); R′=CH=CH, R=n-Pr (3c), n-Bu (3d)] along with R2Sn(OSO2Me)2 [R=n-Pr (4a), n-Bu (4b)]. Similar reactions of the tin precursors with pyridine-2-carboxylic acid provide an access to novel trinuclear tin complexes, R6Sn3(O2CC5H4N-2)3(OSO2Me)3 [R=n-Pr (5a), n-Bu (5b)]. These have been characterized by IR and multinuclear (1H, 13C, 119Sn) NMR spectroscopies. The molecular structures of 3b, 4b and 5b have been determined by X-ray crystallography. Compound 3b is monomeric with bicapped tetrahedron geometry by virtue of anisobidentate coordination of one carboxylate group of each ligand, while the other carboxylic acid group remains free. The polymeric structure of 4b features centrosymmetric eight-membered rings comprising bridging methanesulfonate grou... |
| URI: | http://eprint.iitd.ac.in/dspace/handle/2074/1164 |
| Appears in Collections: | Chemistry
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