Solvent Effects on the <i>O</i>-Neophyl Rearrangement of 1,1-Diarylalkoxyl Radicals. A Laser Flash Photolysis Study
作者:Massimo Bietti、Michela Salamone
DOI:10.1021/jo0518755
日期:2005.12.1
A laser flash photolysis study has been carried out to assess solvent effects on the O-neophyl rearrangement of 1,1-diarylalkoxyl radicals. The rearrangement rate constant k decreases by increasing solvent polarity and an excellent correlation with negative slope is obtained between log k and the solvent polarity parameter ETN. These evidences are in full agreement with the previous indication that
进行了激光闪光光解研究,以评估溶剂对1,1-二芳基烷氧基自由基的O-新叶重排的影响。重排速率常数k通过增加溶剂极性而降低,并且在log k和溶剂极性参数E T N之间获得与负斜率的极好的相关性。这些证据与先前的迹象完全一致,即内部电荷分离的程度随着从起始的1,1-二芳基烷氧基自由基过渡到过渡态而降低。