Intermolecular Electron Spin Transfer between Naphthalene ?-Systems Separated by a Variable Number of Spirobonded Cyclobutane Rings, An. ESR and ENDOR Study
作者:Fabian Gerson、Walter Huber、Wiliam B. Martin、Paul Caluwe、Tim Pepper、Michael Szwarc
DOI:10.1002/hlca.19840670210
日期:1984.3.14
and N5N is slow on the hyperfine time-scale, irrespective of the applied conditions. It is also slow in N1N, except for media of high solvating power. In such media, with a slight reduction of N1N to its radical anion, a paramagnetic species is observed, the hyperfine data for which are consistent with N1N to its radical anion, a paramagnetic species is observed, the hyperfine data of which are consistent
化合物的自由基阴离子N1N,N3N和N,N,其中,两个萘π-系统是由1,3和5 spirobonded环丁烷环,分别分离,THA TOF参考化合物N1,含有一个萘π系统和一个环丁烷环,已在各种实验条件下通过ESR和ENDOR光谱进行了研究。在2个π部分之间分子内的电子自旋转移N3N和N,N是在超精细时间尺度慢,不管所施加的条件。在N1N中它也很慢,除了具有高溶剂化能力的介质外。在此类媒体中,观察到N1N与其自由基阴离子的顺磁性物质,其超细数据与N1N与其顺离子阴离子一致,观察到其超细数据与N1N相一致的超精细数据,经历了快速的分子内电子自旋转移。该物种的ESR和ENDOR光谱叠加在缓慢转移的特征上。有人建议,快和慢传输涉及顺式-和反-conformations分别因为距离,- [R ,两个萘π系统之间N1N是在前者比后者短得多(对于π系统中心之间的距离,r = 740对880 Pm)。详尽