Functionally substituted organotin compounds. Part IV. The use of protecting groups in the formation of 4-oxopentyltin compounds

Abstract

Protection of the carbonyl group in 1-chloropentan-4-one by dioxolan formation has enabled preparation of a series of 4-oxopentyltin compounds via the Grignard reagent. I.r., n.m.r., and Mögssbauer spectroscopy have been used to aid structure assignments: in many of the-compounds the carbonyl group is intramolecularly co-ordinated to tin. Stereochemical assignments have been made for (4-oxopentyl)diphenyltin chloride and di(4-oxopentyl)tin dibromide.