Exceptionally Persistent Nitrogen-Centered Free Radicals. Syntheses, ESR Spectra, Isolation, and X-ray Crystallographic Structures of <i>N</i>-(Arylthio)-2-<i>tert</i>-butyl-4,6-diarylphenylaminyl and <i>N</i>-(Arylthio)-4-<i>tert</i>-butyl-2,6-diarylphenylaminyl Radicals<sup>1</sup>
作者:Yozo Miura、Masayoshi Momoki、Tomohiro Fuchikami、Yoshio Teki、Koichi Itoh、Hisashi Mizutani
DOI:10.1021/jo960347d
日期:1996.1.1
crystallographic structures of 1b and 2b are determined by the X-ray crystallographic analyses. Aminyls 1 and 2 give similar ESR spectra consisting of 1:1:1 triplets with the a(N) values of 0.921-0.948 mT. Deuteration of the phenyl groups on the anilino benzene ring gives rise to a further splitting of the nitrogen 1:1:1 triplet by the anilino meta (0.126-0.138) and phenylthiyl ortho and para protons (0.077-0.096
N-(芳硫基)-2-叔丁基-4,6-二芳基苯胺基(1)和N-(芳硫基)-4-叔丁基-2的制备,ESR光谱,分离和X射线晶体结构,描述了6-二芳基苯胺基(2)。通过N-(芳硫基)-2-叔丁基-4,6-二芳基苯胺和N-(芳硫基)-4-叔丁基-2,6-二芳基苯胺的PbO(2)氧化反应生成胺基。动力学ESR研究表明,即使在存在氧气的情况下,氨酰基也具有相当的持久性,并且以单独的自由基形式存在。在制得的十七种胺基中,N-[(4-硝基苯基)硫基] -2-叔丁基-4,6-二苯基苯胺基(1b),N-[(4-硝基苯基)硫基] -2-叔丁基-4 ,6-双(4-氯苯基)苯基氨基(1f),N-[(4-硝基苯基)硫代] -4-叔丁基-2,6-二苯基苯基氨基(2b),N-[(4-硝基苯基)硫代] -4-叔丁基-2,6-双(4-氯苯基)苯基氨基(2h)和N-[(3,分离出5-二氯苯基)硫] -4-叔丁基-2,6-双(4