Conformational effects on PNCH, PNC, and PNSi spin coupling in tervalent phosphorus–nitrogen compounds

Bulloch, G., Keat, R. and Rycroft, D. S. (1978) Conformational effects on PNCH, PNC, and PNSi spin coupling in tervalent phosphorus–nitrogen compounds. Journal of the Chemical Society: Dalton Transactions, 1978(7), pp. 764-769. (doi: 10.1039/DT9780000764)

Abstract

The ¹H and ¹³C n.m.r. spectra of a series of tervalent phosphorus–nitrogen compounds having a known conformation about the P–N bond have been obtained. These measurements confirm previous assumptions that the coupling constants J(PNCH) and J(PNC) are relatively large and positive for a methyl group having a cis relation with the lone pair of electrons on phosphorus. J(PNCH) is small, and J(PNC) small and negative when the methyl group is trans to the lone pair. The results are discussed by reference to compounds of unknown conformation. The coupling constant, J(PNSi), in a series of silylaminophosphines, Ph₂P·NR·SiMe₃ (R = Me, Et, Prⁱ, or Bu^t), also appears to be related to the conformation adopted by the P–N bond.

• Item Type: Articles
• Keywords: Organophosphorus chemistry, NMR spectroscopy, multiple resonance.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Rycroft, Dr David
• Authors: Bulloch, G., Keat, R., and Rycroft, D. S.
• Subjects: Q Science > QD Chemistry
• College/School: College of Science and Engineering > School of Chemistry
• Journal Name: Journal of the Chemical Society: Dalton Transactions
• Publisher: The Chemical Society
• ISSN: 0300-9246