Synthesis and conformational studies of (diphenylphosphinoamino)-cyclodiphosph(III)azanes

Keat, R., Murray, L. and Rycroft, D. S. (1982) Synthesis and conformational studies of (diphenylphosphinoamino)-cyclodiphosph(III)azanes. Journal of the Chemical Society: Dalton Transactions, 1982(8), pp. 1503-1508. (doi: 10.1039/DT9820001503)

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A series of 2,4-bis(diphenylphosphinoalkylamino)-1,3-di-t-butylcyclodiphosph(III)azanes, [(Ph2P)RNPNBut]2 [R = Me or Et (cis- and trans-isomers); R = Pri or But (cis-isomers)], have been prepared by the reactions of N-lithiated alkyl-N-(diphenylphosphino)amines, N(PPh2)(R)(Li), with 2-cis-4-dichloro-1,3-di-t-butylcyclodiphosph(III)azane, (ClPNBut)2, in benzene solution. Hydrogen-1, 13C, and 31P n.m.r. spectroscopy show that these compounds are cyclodiphosph(III)azanes rather than phosph(III)azenes, (Ph2P)RNP=NBut, in solution, and variable temperature 31P n.m.r. data have enabled the preferred conformations of the exo-P–N–P skeletons to be identified. In the case of [(Ph2P)RNPNBut]2 (R = Pri and But) more than one conformer can be distinguished at sub-ambient temperatures.

Item Type:Articles
Keywords:Phosphorus chemistry, NMR spectroscopy.
Glasgow Author(s) Enlighten ID:Rycroft, Dr David
Authors: Keat, R., Murray, L., 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:Royal Society of Chemistry

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