作者:J�rg Bruhin、Fabian Gerson、Hiroaki Ohya-Nishiguchi
DOI:10.1039/p29800001045
日期:——
4,5,7,8-tetramethyl[2.2]paracyclophane (II) has been converted to its radical cation (II+˙) and to its radical anion (II–˙). These radical ions, as well as those generated from the 12,13,15,16-tetradeuterio ([2H4]II) and the 1,1,10,10,12,13,15,16-octadeuterio-derivative ([2H8]II), have been studied by e.s.r. and, in part, by e.n.d.o.r. spectroscopy. In (II+˙), the bulk of the spin population is located
通过使用强氧化剂和还原剂,已将4,5,7,8-四甲基[2.2]对环环烷(II)转变为其自由基阳离子(II + ˙)和其自由基阴离子(II - ˙)。这些自由基离子,以及由12,13,15,16-四氘代([ 2 H 4 ] II)和1,1,10,10,12,13,15,16-十八氘代衍生物([ [ 2 H 8 ] II),已经通过esr进行了研究,部分地通过内光谱法进行了研究。在(II + ˙),自旋人口的大部分位于所述甲基取代的苯环上,在(II而,-˙),在环上没有甲基。该结果对应于烷基取代的效果,该效果增强了供体并削弱了π系统的受体特性。比较(II˙ +)和二聚自由基阳离子(II 2 + ˙)的超精细数据,发现与ca的比值存在相当大的偏差。0.5,预期在这两个物种中质子的耦合常数。在(II ESR谱- ˙)从所述抗衡离子的核(大劈裂39 ķ0.102和133 Cs的0.596 MT)是值得注意的;