Cef. Rickard et al., Reversible methyl group migration between osmium and tin in reactions of osmium trimethylstannyl complexes, CHEM COMMUN, (12), 1999, pp. 1101-1102
Treatment of the coordinatively unsaturated osmium trimethylstannyl complex
, Os(SnMe3)Cl(CO)(PPh3)(2) 1, with either pyridine (py) or sodium acetate r
esults in methyl migration from tin to osmium, giving the structurally char
acterised complexes, Os(Me)(SnClMe2)(py)-(CO)(PPh3)(2) 2 or Os(Me)(SnMe2OC[
Me]O)(CO)(PPh3)(2) 3, respectively: the methyl migration is reversible and
treatment of Os(Me)(SnClMe2)(py)(CO)(PPh3)(2) with CO gives the trimethylst
annyl complex, Os(SnMe3)Cl(CO)(2)(PPh3)(2).