作者:Toshikazu Kitagawa、Toru Tanaka、Yuki Takata、Ken'ichi Takeuchi、Koichi Komatsu
DOI:10.1016/s0040-4020(97)00339-6
日期:1997.7
predicted from pKHA of t-BuC60− and pKR+ of 1a–c+ using Arnett's master equation. The results suggest that steric repulsion between the 1-tert-butyl group and the cycloheptatrienyl group on the surface of C60 plays an important role in enhancing the heterolysis of 2a–c. © 1997 Elsevier Science Ltd.
的协调叔-butylfulleride离子(吨-BuC 60 -与鎓()1A +),1,4-二-叔-butyltropylium(1B +),和1,4- dicyclopropyltropylium(1C +)离子,得到1-叔-丁基-4-(3,6-R 2 -2,4,6-环庚三烯-1-基)-1,4-二氢富勒烯(2a:R = H,2b:R = t -Bu,2c:R = cyc -Pr)异构形式。2a–c的结构由1确定1 H NMR NOE实验。光度法的研究表明,2a-c中是唯一的烃再生吨-BuC 60 -和1 +在通过碳-碳σ键的heterolysis极性溶剂。虽然这种轻便heterolysis是由于主要是为了既具有高的热力学稳定性吨-BuC 60 -和1A-1C +,heterolysis的自由能显着地大于由对预测下ķ HA的吨-BuC 60 -和pK值[R +的1a–c +使用Arnett的主方程式。结果表明,C