Thermal decomposition of dibenz[b,d]iodolium and 10H-dibenz[b,e]-iodininium halides. Evidence for a homolytic pathway from halogen scrambling, hydrogen transfer, and trapping
Abstract
The thermal decomposition of dibenz[b,d]iodolium halides and 10H-dibenz[b,e]iodininium halides has been examined. Observation of products of halogen scrambling and hydrogen transfer suggested a radical mechanism involving 2′-iodobiphenyl-2-yl and 2-(2-iodobenzyl)phenyl radicals. Results of trapping experiments with an acetylenic ester suggested the involvment of a biphenyl diradical.