Australian Journal of Chemistry p. 1341 - 1351 (1987)
Update date:2022-08-04
Topics:
Brooks, Peter
Gallagher, Michael J.
Sarroff, Adrian
The title phosphines, Ph2P(CH2)nPPh2 (n=2-5), react with lithium in tetrahydrofuran to give the corresponding 1, n-dilithio-1, n-di(phenylphosphines) directly with little or on intermediacy of the 1-lithio-1-phenyl-n-diphenylphosphinoalkanes which can, however, be obtained by arylation of the diphosphides.Methylenebisdiphenylphosphine and 1,4-diphenyl-1,4-diphosphinane undergo exclusive phosphorus-alkyl carbon cleavage.The chemistry and 31P n.m.r. spectroscopy of the diphosphides are described and the mechanism o the cleavage reaction is discussed.Some cleavage reactions in liquid ammonia are described.
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