Yoshihiko Nakao, H. Sugeta, Y. Kyōgoku
1986
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0
Influential Citations
10
Citations
Journal
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Abstract
Abstract Intermolecular self-associations of 2,4-pentanediol, 2-methyl-2,4-pentanediol and 1,3-butanediol in carbon tetrachloride solution have been studied by i.r. and 1 H-NMR spectroscopy. The spectrophotometric data have been analyzed by the least squares method to obtain the association constants and thermodynamic parameters. It turned out that 2,4-pentanediol, 2-methyl-2,4-pentanediol and 1,3-butanediol all take a cyclic trimer structure through hydrogen bonding. The association constants for trimerization were obtained as 330 and 810 mol −2 dm 6 at 30°C, and the enthalpy changes were −34 and −38 kJ mol −1 and entropy changes were −62 and −68 J K −1 mol −1 , for 2,4-pentanediol and 2-methyl-2,4-pentanediol, respectively.