31P Hyperfine interaction in a new type of phosphorus-containing iminoxy free radicals. An ESR study
作者:Zdzislaw Siatecki、Piotr J. Chmielewski、Adam Jezierski
DOI:10.1002/mrc.1260300213
日期:1992.2
Iminoxy radicals of a new type, having the general formula RC(NO˙)P(O)(OEt)2, were synthesized and characterized by means of ESR spectroscopy. The presence of two isomers due to the different position of the CNO˙ fragment with respect to the R substituent and the P atom, and the relative stability of the isomers, was established. The influence of the R substituent on the relative population of the
合成了一种具有通式RC(NO·)P(O)(OEt)2的新型亚胺氧基自由基,并通过ESR光谱对其进行了表征。由于 CNO• 片段相对于 R 取代基和 P 原子的不同位置,两种异构体的存在以及异构体的相对稳定性已被确定。发现了 R 取代基对异构体相对数量的影响。异构体的氮超精细常数相差约 10%,而含量较少的异构体的磷超精细常数约为 6 倍,达到 60 G。发现该超精细常数的值与 Dimroth 之间存在线性相关性–Reichardt ET(30) 溶剂参数。