the degree of dissociation is in most cases low, and the concentration of persistent radicals – even if they are spectroscopically observable at ambient temperature – remains small. Appreciable dissociation was established only for the sterically highly congested acyclic derivative 9}2. Analysis of the trends in experimental data in connection with DFT studies indicate that radical formation is favoured
Rational Synthesis and Mutual Conversion of Bis‐N‐heterocyclic Diphosphanes and Secondary N‐Heterocyclic Phosphanes
作者:Oliver Puntigam、Daniela Förster、Nick A. Giffin、Sebastian Burck、Johannes Bender、Fabian Ehret、Arthur D. Hendsbee、Martin Nieger、Jason D. Masuda、Dietrich Gudat
DOI:10.1002/ejic.201201471
日期:2013.4.12
hydrolysis, and thus grants high product yields. In some cases, secondaryphosphanes were formed together with or instead of diphosphanes. This reaction is explained by a follow-up process involving homolytic fission of diphosphanes to give phosphanyl radicals, which then react with ammonium salts to give a mixture of secondaryphosphanes and chlorophosphanes. Even if its synthetic scope is as yet limited