標題: | GRAPHICAL DETERMINATION OF MONOMER SHIFT, DIMER SHIFT AND DIMERIZATION CONSTANT FOR SELF-ASSOCIATION - 2-ISOPROPYL PHENOL IN C6D12 AS AN EXAMPLE |
作者: | CHEN, JS SHIAU, JC FANG, CY 交大名義發表 應用化學系 National Chiao Tung University Department of Applied Chemistry |
關鍵字: | MONOMER DIMER EQUILIBRIUM;NMR SHIFT;GRAPHICAL METHOD;OLIGOMERIZATION |
公開日期: | 1-六月-1995 |
摘要: | We propose a graphical method to treat dilution shift in NMR spectra to determine the monomer shift, dimer shift and dimerization constant simultaneously and consistently for the system of monomer/dimer equilibrium. The salient features include avoiding error-prone manual extrapolation to zero concentration to obtain a monomer shift, and providing consistent assessment and error estimation for the determination. The dilution shifts of 2-isopropyl phenol in C6D12 serve to demonstrate this graphical method. The enthalpy and entropy of dimerization are determined via a van't Hoff plot from the temperature variation of the dimerization constant. |
URI: | http://hdl.handle.net/11536/1873 |
ISSN: | 0009-4536 |
期刊: | JOURNAL OF THE CHINESE CHEMICAL SOCIETY |
Volume: | 42 |
Issue: | 3 |
起始頁: | 499 |
結束頁: | 505 |
顯示於類別: | 期刊論文 |