PATTERNS OF NUCLEAR-SPIN COUPLING IN SPECIES WITH PLATINUM-TIN BONDS - A COMPARISON OF PHOSPHORUS AND TIN

Journal article

A range of heteronuclear magnetic multiple-resonance experiments involving 1H, 31P, 119Sn, 195Pt, and 207Pb was used to determine the absolute signs of nuclear spin-coupling constants for platinum(II) complexes with PR3 [R = alkyl, aryl, or alkoxy] and SnCl3-, SnPh3-, or PbPh3- as ligands. The signs of and trends in the reduced coupling constants 1K(EX) and 2K(EX) for E = Sn(Pb) closely parallel those for E = P, but the actual magnitudes for E = Sn(Pb) are much larger than expected when the mean excitation-energy approximation is used as a basis for the Fermi-contact contribution. This is attributed to greater s character for the hybrid orbital used by E to form the E-Pt bond when E = Sn(Pb) which affects the mutual polarizability and hence K(EX).

Authors: Mcfarlane, W; Rees, N

• Publication status: Published
• Journal: JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
• Issue: 11
• Pages: 3211-3214
• Publication date: 1990-11-01
• DOI: 10.1039/dt9900003211
• EISSN: 1364-5447
• ISSN: 0300-9246
• Language: English