6533b7d8fe1ef96bd126ac48

RESEARCH PRODUCT

Über blei-haltige Heterocyclen

Barbara M. SchmidtMartin Dräger

subject

Coupling constantChemistryStereochemistryOrganic ChemistryCyclohexane conformationIntermolecular forcechemistry.chemical_elementCrystal structureBiochemistrySpectral lineInorganic ChemistryMetalCrystallographyvisual_artMaterials Chemistryvisual_art.visual_art_mediumPhysical and Theoretical ChemistryTin

description

Abstract Crystal structures of alternating six-membered rings [Ph2PbS]3-P21/c and [Ph2SnS]3-P21/n have been determined by X-ray methods. Both heterocycles exhibit a C2-symmetric twisted boat conformation with tetrahedral coordination of the metal atoms [dPbS 2.491 A (dSnS 2.401 A, dPbC 2.19 A (dSnC 2.129 A)]. No additional intermolecular contacts have been found. A ring-segment exchange reaction in solution has been observed by NMR. In the resulting equilibrium new cyclic compounds containing both tin and lead atoms with coupling constants 2J(207PbS119Sn) 226 Hz have been detected. FD-mass spectra indicate formation of dimeric molecular units.

yearjournalcountryeditionlanguage
1990-12-01Journal of Organometallic Chemistry
https://doi.org/10.1016/0022-328x(90)80084-d