Encapsulation of organotin compounds in metal acetate glasses

✍ Scribed by John A Duffy; Paul Harston; James L Wardell; Peter J Smith

• Publisher: John Wiley and Sons
• Year: 1990
• Tongue: English
• Weight: 248 KB
• Volume: 4
• Category: Article
• ISSN: 0268-2605
• DOI: 10.1002/aoc.590040112

✦ Synopsis

Abstract

Triorganotin halides, oxides and sulphides can be dissolved in molten, mixed‐metal acetates at ca 140–160°C without decomposition; quenching provides glasses into which are encapsulated the organotin species. Halide/acetate and oxide/acetate, but not sulphide/acetate, exchanges occur in the melt. Only partial exchange was found for hindered trineophyl tin chloride [(PhCMe~2~CH~2~)~3~SnCl], in contrast to the complete exchanges observed for the butyl (Bu), phenyl (Ph) and cyclohexyl (Cy) analogues. Complete oxide/acetate exchange was found for (Bu~3~Sn)~2~O, partial exchange occurred for (Cy~3~Sn)~2~O, whilst no exchange resulted with bis(trineophyltin) oxide or (Ph~3~Sn)~2~O. Tin–tin bonds (e.g. as in Ph~3~SnSnPh~3~) and carbon–tin bonds (even the allyl–Sn bond in Bu~3~SnCH~2~CHCH~2~) are not affected. The acetate glasses dissolve in aqueous media with release of the organotin species and they have potential as slow‐release systems which is currently being investigated.