- 作者: 劉廣定 ; 唐崇鑫 ; 秦建譜
- 作者服務機構: 台灣大學化學系
- 中文摘要: Solvolyses of tosylates IIB and IIC in a variety of solvents were found to give excellent linear log k- Y/sub BnOTs/ plots (R=0.997 and SD=0.022) and negative △ S/sup .neq./ for IIB, but slight deviations (R=0.987 and SD=0.047) from lineation and positive △S/sup .neq./ for several cases for IIC. Limiting S/sub N/l mechanisms with steric hindrance to resonance and solvent intervention at the cationic transition state could thus be confirmed. The inconsistency between theoretical and observed trend of △ H/sup .neq./ is attributed to the neglect of solvent effect in MO calculations. Deductions linking theoretical calculation and solvolytic experiments should be drawn with caution.
- 英文摘要: --
- 中文關鍵字: Solvolyses; Activation Parameter; Solvent Effect; Theoretical Calculation; Tosylate
- 英文關鍵字: 溶劑分離;活化參數;溶劑效應;理論計算