
TY  - JOUR
A1  - Brooks, P 
A1  - Gallagher, MJ 
A1  - Sarroff, A 
T1  - Organophosphorus Intermediates. IX. The Cleavage of &#945;,&#969;-Bisdiphenylphosphinoalkanes With Lithium. A <sup>13</sup>P N.M.R. Study
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1987
VL  - 40
IS  - 8
SP  - 1341
EP  - 1351
KW  - 
UR  - https://doi.org/10.1071/CH9871341 
N2  - The title phosphines, Ph2P(CH2).PPh2 (n = 2-5), react with lithium in tetrahydrofuran to give the corresponding 1, n-dilithio-1, n-di(phenylphosphines) directly with little or no 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 of the cleavage reaction is discussed. Some cleavage reactions in liquid ammonia are described. 
ER  -

