Rearrangements of Radical Cations of [2.2]Paracyclophanes and of a bridged [14]annulene to those of pyrenes: An ESR and ENDOR study
作者:Fabian Gerson、Walter Huber、Thomas Wellauer
DOI:10.1002/hlca.19890720631
日期:1989.9.20
ESR and ENDOR studies have been carried out on the radical cations obtained consecutively by reaction of trans-10b, 10c-dimethyl-10b, 10c-dihydropyrene (4) with AlCl3 in CH2C12. The primarily formed rearranges at 253 K to the radical cation(s) of 1,6- (5a) and/or 1,8-dimethylpyrene (5b). At 323 K, the spectra of / are replaced by that of the highly persistent radical cation of 1,3,6,8-tetramethylpyrene
对通过反式-10b,10c-二甲基-10b,10c-二氢py(4)与AlCl 3在CH 2 Cl 2中的反应连续获得的自由基阳离子进行了ESR和ENDOR研究。最初形成的分子在253 K处重排为1,6-(5a)和/或1,8-二甲基py(5b)的自由基阳离子。在323 K处,/的光谱被1,3,6,8-四甲基py(6)的高持久性自由基阳离子的光谱所代替。令人惊讶的是,它也是由4,5,7,8-(1),4,7,13,16- (2)和4,5,12,13-四甲基[2.2]处理产生的唯一可观察到的顺磁产物。] paracyclophane(3)在353 K的CH 2 Cl 2中用AlCl 3进行。讨论了重排[,,]中中间体的结构。