J. Am. Chem. Soc. 2000, 122, 8067-8070
8067
The Structure of the Nonamethylcyclopentyl Cation Olga Kronja,*,† Thies-Peter Ko1 hli,‡ Herbert Mayr,§ and Martin Saunders⊥ Contribution from the Faculty of Pharmacy and Biochemistry, UniVersity of Zagreb, A. KoVacˇ ic´ a 1, 10000 Zagreb, Croatia, Institut fu¨ r Chemie, Medizinische UniVersita¨ t zu Lu¨ beck, D-23538 Lu¨ beck, Germany, Department Chemie, Ludwig-Maximilians-UniVersita¨ t Mu¨ nchen, D-81377 Mu¨ nchen, Germany, and Department of Chemistry, Yale UniVersity, P.O. Box 208107, New HaVen, Connecticut 06520-8107 ReceiVed May 3, 2000
Abstract: The nonamethylcyclopentyl cation shows two types of methyl substituent in the NMR spectrum at low temperatures: four methyl groups undergo rapid circumambulatory migration with a barrier
