Volume profiles and mechanisms for the alkaline decomposition of phosphonium salts and phosphate esters

✍ Scribed by Neil S. Isaacs; Obeid Hassan Abed

• Publisher: Elsevier Science
• Year: 1986
• Tongue: French
• Weight: 140 KB
• Volume: 27
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(00)84218-5

✦ Synopsis

Volumes of activation have been measured for the alkaline devsition of triphenylbenzylphosphonium and triphenyl(p-nitrobenzyl)phosphonium ions which lead to the formation of triphenylI%osphine oxide and the toluene.The rates of reaction are very strongly qtarded by pressure, volm of activaticm are +32 cm rrol while thevolm of reaction is +16. This accords with a two-ar three-step mechanism, involving desolvation and fragmentation each of which contributes an increase in wlume. Diethyl(p-nitrophenyl@osphate hydrolyses by a BAc2 rrechanism, Ab= -16.