New 2-substituted pyrroline-N-oxides: An EPR solvent study of the radical spin adducts
作者:Edward G. Janzen、Yong-Kang Zhang、D. Lawrence Haire
DOI:10.1002/mrc.1260321203
日期:1994.12
water) were measured and the solvent effect on these parameters was evaluated. It was found that for the various 2‐substituted DMPO‐type spin adducts both the nitrogen and β‐hydrogen EPR hyperfine splittings correlated linearly (r2 ⩾ 0.90) with typical solvent polarity parameters such as ET(30). The correlation between the nitrogen and β‐hydrogen hyperfine splitting constants were even more linear (r2
制备了 10 个取代的 5,5-二甲基-1-吡咯啉-N-氧化物以及母体氮烯自旋阱(DMPO):5,5-二甲基-1-吡咯啉-N-氧化物、2,5,5-三甲基-1-吡咯啉-N-氧化物、2-叔丁基-5,5-二甲基-1-吡咯啉-N-氧化物、2-苯基-5,5-二甲基-1-吡咯啉-N-氧化物、2-d5 -苯基-5,5-二甲基-1-吡咯啉-N-氧化物, 2-苯基-5,5-二甲基-1-吡咯啉-N-氧化物-硝酰基-13 C, 2-(4-氟苯基)-5, 5-二甲基-1-吡咯啉-N-氧化物、2-(4-氯苯基)-5,5-二甲基-1-吡咯啉-N-氧化物、2-(4-叔丁基苯基)-5,5-二甲基- 1-吡咯啉-N-氧化物、2-(4-甲基苯基-5,5-二甲基-1-吡咯啉-N-氧化物)和2-(2-甲基苯基)-5,5-二甲基-1-吡咯啉-N-氧化物。获得了这些新型环状硝酮的分析(即 EPR 级)样品,并通过(除其他方法外)1H