Thermolysis of Free-Radical Initiators: <i>tert</i>-Butylazocumene and Its 1,3- and 1,4-Bisazo and 1,3,5-Trisazo Analogues
作者:Paul S. Engel、Li Pan、Yunming Ying、Lawrence B. Alemany
DOI:10.1021/ja003914u
日期:2001.4.1
as a "one-radical" initiator of styrene polymerization. The ABNO-trapped cumyl radical 29 is a particularly stable trialkylhydroxylamine, whose thermolysis half-life is 2.1 h at 150 degrees C. Taking advantage of this stability, we trapped the cumyl radical centers from 7 to afford tris adduct 32a. While the behavior of the meta bisazoalkane 6 can be mostly predicted from that of 4, the para isomer