Electron Spin Resonance Spectra of Sulfinamidyl Radicals and a Comparison of Hyperfine Splitting Constants with Sulfenamidyl and Sulfonamidyl Radicals
作者:Yozo Miura、Yuji Nakamura
DOI:10.1246/bcsj.63.1154
日期:1990.4
sulfinamides (7) with di-t-butyl diperoxyoxalate (DBPO) in benzene at 21 or 40°C, give hyperfine splitting (hfs) constants which indicate that the unpaired electron is slightly delocalized onto the sulfinyl group. A comparison of the hfs constants for 2 with those for structurally related sulfenamidyl and sulfonamidyl radicals indicates that the abilities of –SR, –S(O)R, and –S(O2)R to delocalize the unpaired
描述了 N-芳基亚磺酰基-和 N-烷基亚磺酰基-3,5-二-叔丁基苯基氨基 (2) 的 ESR 光谱研究。亚磺酰胺基 2 是由相应的亚磺酰胺 (7) 与二过氧化草酸二叔丁酯 (DBPO) 在苯中在 21 或 40°C 下反应生成的,给出超精细分裂 (hfs) 常数,表明未配对电子略微离域到亚磺酰基上。将 2 的 hfs 常数与结构相关的亚磺酰胺基和磺酰胺基自由基的 hfs 常数进行比较表明,–SR、–S(O)R 和 –S(O2)R 使未配对电子离域的能力顺序为 –SR >–S(O)R>–(O2)R。7 与 DBPO 的反应已在产品分析的基础上进行了检查。简要讨论了形成分离产物的机制。