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