標題: NMR study of hydrogen bonding association of some sterically hindered alcohols in carbon tetrachloride, chloroform and cyclohexane
作者: Luo, WC
Lay, JL
Chen, JS
應用化學系
Department of Applied Chemistry
關鍵字: dimerization;monomer shift;dimer shift;graphical method
公開日期: 2002
摘要: The self-association (dimerization) due to hydrogen bonding for some alcohols with bulky side chains was investigated by nuclear magnetic resonance spectroscopy. The systems studied include 2,4-dimethyl-3-pentanol or 3-methyl-3-pentanol in [H-2(12)]cyclohexane, carbon tetrachloride or [H-2(1)]chloroform, and 2,3,4-trimethyl-3-pentanol in carbon tetrachloride. The dilution shift data of hydroxyl proton were measured and employed to deduce the monomer shift, dimer shift and dimerization constant with the help of a graphic method. Use of van't Hoff plot for dimerization constants thus obtained at different temperature gave the enthalpy and entropy of dimerization. Also discussed herein is the effect of substituent hindrance and dielectric constant of solvent on the self-association.
URI: http://hdl.handle.net/11536/29108
http://dx.doi.org/10.1524/zpch.2002.216.7.829
ISSN: 0942-9352
DOI: 10.1524/zpch.2002.216.7.829
期刊: ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS
Volume: 216
起始頁: 829
結束頁: 843
顯示於類別:期刊論文


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