- 作者: 劉廣定、段葉芳
- 作者服務機構: Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, R.O.C. and Chemical Engineering Department, National Taipei University of Technology, Taipei, Taiwan 104, R.O.C.
- 中文摘要: The solvolysis of a-tert-butyl-2-naphthylmethyl, 9-fluorenyl, and some 1-aryl-1-tert-butylmethyl tosylates (8-10) in a variety of solvents were studied. Both the single-parameter Hammett-Brown equation and the dual-parameter Yukawa-Tsuno equation showed linear correlations. The variation of r values was discussed. A new YxBnOTs scale was developed, and the YBnOTs scale was expanded. Solvent effects for a number of tosylates were examined. Excellent linear relationships observed from the single-parameter Grunwald-Winstein equation (Eqn. 2) for 9-fluorenyl tosylate (10) led to the conclusion that the 9-fluorenyl cation in the solvolysis transition state was unlikely antiaromatic. Anchimeric assistance in the solvolysis of 16-19 was discussed.
- 英文摘要: --
- 中文關鍵字: 1-Aryl-1-tert-butylmethyl tosylates; a-Tert-butyl-2-naphthylmethyl tosylate; 9-Fluorenyl tosylate; Grunwald-Winstein equation; Hammett plots; Antiaromaticity; Anchimeric assistance.
- 英文關鍵字: 1-Aryl-1-tert-butylmethyl tosylates; a-Tert-butyl-2-naphthylmethyl tosylate; 9-Fluorenyl tosylate; Grunwald-Winstein equation; Hammett plots; Antiaromaticity; Anchimeric assistance.