Nucleophilic attack within Ge, Sn and Pb complexes containing Me2N(CH2)(3) - as a potential intramolecular donor ligand

1998

Abstract Thirteen tin compounds LxPhySnClz and LPh2SnPhX (x=1–4, y=0–3, z=0–2, XPh, F, Cl, Br, I, OPh), six germanium compounds LxPhyGeClz and four lead compounds LPh2PbPhX (XPh, Cl, Br, I) containing the potential intramolecular donor LMe2N(CH2)3—have been synthesized by Grignard reactions, redistribution, halogenation, exchange of halide and phenylation. Evidence for 1,5-chelation in which the donor Me2N intramolecularly attacks the Lewis-acidic atoms Ge, Sn or Pb is provided by six crystal structure determinations: Me2N(CH2)3SnPh2Cl, 5; Me2N(CH2)3SnPh2Br, 5a; Me2N(CH2)3SnPh2I, 5b; Me2N(CH2)3SnPh2OPh, 5d; Me2N(CH2)3SnPh3·HCl·H2O. 1a; Me2N(CH2)3PbPh2I, 17b), and by solution 13C, 119Sn a…