FTIR study of hydrogen bonding association of sterically hindered alcohols: 2,2-dimethyl-3-ethyl- 3-pentanol and 3-ethyl-2-methyl-3-pentanol

• Main Authors: Dah-Yu Kao, 高大宇
• Other Authors: Jenn-Shing Chen
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/67780504842471540172

博士 === 國立交通大學 === 應用化學系所 === 92 === The monomer-dimer self-association of some alcohols with bulky side chains has been studied using FTIR spectroscopy. The spectral band of the OH fundamental stretching for a monomer and that for a dimer were resolved and their respective integrated absorbances were calculated. The dilution shift data of OH proton were measured and employed to determine the molar absorptivity of the monomer band, the dimer band and the dimerization constant. The standard enthalpy and entropy of dimerization were determined via a van't Hoff plot from the temperature variation of the dimerization constant. This study includes two systems. The first deals with the self- association of 2,2-dimethyl-3-ethyl-3-propanol through hydrogen bonding in carbon tetrachloride, carbon disulfide, tetrachloroethylene and n-octane. The second deals with the self-association of 3-ethyl-2- methyl-3-propanol through hydrogen bonding in carbon tetrachloride, carbon disulfide, tetrachloroethylene and n-octane. We can understand the character of hydrogen bonding through this discussion.