Cleavage Reactions of some Phenyltin Compounds with Iodine Halides, -Pseudohalides and -Carboxylates

Chemistry Department, Lucknow University, Lucknow-226 007

Manuscript received 14 December 1994, revised 19 September 1995, accepted 4 March 1996

Cleavage reactions of iodinehalides, -pseudohalides IX (X = CI, Br, NCO, NCS, N₃ and CN) with Ph₃SnCp yield triphenyltinlutlides, -pseudohalides (Ph₃SnX) indicating cleavage of Cp-Sn bond in preference to Ph-Sn bond, and cleavage reactions of iodine carboxylates IX' (X' = CH₃OCO, C₅H₅OCO, C₅H₅CH₂OCO, o-NH₂C₆H₄OCO, o- ClC₆H₄OCO, p-NO₂C₆H₄OCO, p -NH ₂C₆H₄OCO, C₆H₅CH =CHOCO) (in situ) with Ph₃SnCl give hitherto unknown diphenylchlorotin carboxylates (Ph₂SnX'Cl) indicating cleavage of Ph—Sn bond in preference to Cl—Sn bond. On the basis of the results, it is predicated that these diphenylchlorotin carboxylates possess bridging carboxylate groups (inter-molecularly chelated structure) in the solid state, whereas in solution they contain chelated carboxy­late groups (intra-molecularly chelated structures).