Accession Number : ADA141512

Title :   Substitution and Addition Reactions of a (Methylene)phosphine with Alkyllithium Reagents.

Descriptive Note : Technical rept. for period ending 1983,

Corporate Author : TEXAS CHRISTIAN UNIV FORT WORTH DEPT OF CHEMISTRY

Personal Author(s) : Li,B L ; Neilson,R H

PDF Url : ADA141512

Report Date : 18 May 1984

Pagination or Media Count : 12

Abstract : Treatment of the (methylene)phosphine (Me3Si)2NP=CHSiMe3 (1) with alkyllithium reagents and Me3SiCl affords either the diphosphinomethane derivative R2P-CH(SiMe3)-P(R)CH(SiMe3)2 (2, R = Me) or the trialkylphosphine R2PCH(SiMe3)2 (3, R = t-Bu). A reaction pathway involving both nucleophilic substitution and addition reactions at the P=C moiety is suggested. Compound 2 exhibits hindered rotation about the P-CH(SiMe3)2 bond with a measured delta G+ sub c of 17.7 kcal/mole. (Author)

Descriptors :   *Phosphine, *Methylenes, *Substitution reactions, *Addition reactions, Alkyl radicals, Lithium compounds, Nucleophilic reactions, Rotation(Chemical bonds)

Subject Categories : Organic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE