6533b824fe1ef96bd12813d4
RESEARCH PRODUCT
Über tetraaryl-methan-analoga in der gruppe 14
Bernd MathiaschClaudia Schneider-koglinMartin Drägersubject
chemistry.chemical_classificationStereochemistryChemical shiftOrganic ChemistryNuclear magnetic resonance spectroscopyCrystal structureGrignard reagentBiochemistryMedicinal chemistryInorganic Chemistrysymbols.namesakechemistryX-ray crystallographyMaterials ChemistrysymbolsMoleculePhysical and Theoretical ChemistryRaman spectroscopyAlkyldescription
Abstract The title compounds have been synthesized by Grignard reactions or pyrolysis of diplumbanes respectively. The crystal structures of m -Tol 4 Pb and Ph 4 Pb (redetermination) have been determined. All eight compounds (Ph/Tol) 4 (Sn/Pb) are S 4 symmetric and contracted along this unique axis. The 13 C-NMR chemical shifts and the couplings 1 J ( 119 Sn/ 207 Pb 13 C) as well depend additively upon the methyl substituents. The ratios 1 K ( 207 Pb 13 C): 1 K ( 119 Sn 13 C) of the reduced coupling constants are all near to 1.61; a comparison with values from the literature for alkyl, alkenyl and alkinyl substituents is given. The ratio δ( 207 Pb):δ( 119 Sn) results in 2.28. IR (700 down to 200 cm −1 ) and Raman (700 down to 50 cm −1 ) data are given.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1994-04-01 | Journal of Organometallic Chemistry |