Abstract Phosphinoalkylchlorostannanes of the type Me 2 Sn (Cl)(CH 2) n PR 1 R 2 (n= 2, 3)(I–VIII) are synthesized by a redistribution reaction of the tetraorganostannanes Me 3 Sn (CH 2) n PR 1 R 2 (n= 2, 3) with trimethyltin chloride. In non-coordinating solvents the tin atom in I–IV is tetracoordinated, whereas NMR data indicate an intramolecular Sn single bond P interaction for V–VIII. In the solid state compound III exists as an 1: 1 adduct with ...