6533b870fe1ef96bd12d0699

RESEARCH PRODUCT

Über gemischte gruppe 14-gruppe 14-bindungen

Bernd MathiaschClaudia Schneider-koglinMartin Dräger

subject

Carbon groupChemistryStereochemistryArylChemical shiftOrganic ChemistryHalideEtherCrystal structureBiochemistryInorganic ChemistryCrystallographychemistry.chemical_compoundsymbols.namesakeMaterials ChemistrysymbolsPhysical and Theoretical ChemistryRaman spectroscopy

description

Abstract The lead-tin compounds o-Tol6PbSn, o-Tol3PbSnPh3 and Mes3PbSnPh3 have been synthesized from Li and halide precursors in THF/ether at low temperatures. The crystal structures of the S4 symmetric o-Tol4Pb and of the three isomorphous title compounds have been determined (d(SnSn) 2.883 (1), d (PbSn) 2.845 (2), d (PbPb) 2.895 (2), A). The long SnSn distance is in accordance with the Raman data for the pairs of p-Tol6/o-Tol6 substituents (ν(SnSn) 131/123, ν(PbSn) 114/114, ν(PbPb) 105/103 cm−1). The sequence of the 119Sn and 207Pb chemical shifts shows clearly a polarity Pbδ−Snδ+ for all lead-tin compounds investigated. The 1J (119Sn207Pb) and 1J(119Sn119Sn) couplings of identically substituted compounds depend upon another in a nearly linear manner.

yearjournalcountryeditionlanguage
1993-04-01Journal of Organometallic Chemistry
https://doi.org/10.1016/0022-328x(93)80063-h