Methyl-Dichlorophosphate von Zinn und Blei

Methyl Dichlorophosphates of Tin and Lead The compounds (CH₃)₃M(O₂PCl₂) (I), (M = Sn, Pb) and (CH₃)₂Sn(O₂PCl₂)₂ (II), formed by the reaction of the corresponding methyltin and methylleadchlorides with P₂O₃Cl₄ are described. The IR and Mössbauer spectra suggest that the tin compounds are polymerized through O? P? O bridges, whereby (I) and (II) contain metal atoms with coordination numbers five (D_3h) and six (D_4h), respectively.