The Association of 3‐ethylpentanol‐3 in Carbon Tetrachloride from the Static Dielectric Permittivity and the Infrared Absorbance

Kunst, M.; Duijn, D. van; Bordewijk, P.

doi:10.1002/bbpc.19760800904

Cited by 21 publications

(8 citation statements)

References 21 publications

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“…Thus the speciation of different alcohol aggregates can vary significantly with the structure of the alcohol. These conclusions are supported by IR spectroscopic data 37 and dielectric measurements 45 (see ESI † ).…”

Section: Resultssupporting

confidence: 56%

Polarisation effects on the solvation properties of alcohols

et al. 2018

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Section: Resultssupporting

confidence: 56%

Polarisation effects on the solvation properties of alcohols

et al. 2018

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“…The appearance of a new band in this region can be due to the form ation of open-chain multimers, where the nonbonded, or pseudo-free, hydroxyl group contributes with an absorption band. 2,6,8,9 Inspection of the second-derivative spectra of 2,4-dimethyl-3-pentanol reveals that, in the high-frequency rotamer, a low-frequency shoulder appears before any shift of the two original rotamer bands is obser ved. In 3-ethyl-3-pentanol, a high-frequency shoulder arises in the low-frequency rotamer, and no shift is initially obser ved in the high-frequency rotamer.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, branched/sterically hindered alcohols do not form a -m ultimers if the hindrance is large enough. [3][4][5][6][7][8] In the concentration range from dilute to intermediate concentrations, linear associates, as well as cyclic or closed m ultimers. These assignments are based on both IR and dielectric measurements.…”

Section: Introductionmentioning

confidence: 99%

“…[2][3][4][5] A further detailed assignment of the structure and degree of association in the low concentration range (up to ; 0.1 M) of m any alcohols, both linear and branched, is m ade by describing the associations as 1-2-4 equilibria of monomers, dimers, and tetramers. [3][4][5][6]8 However, at higher concentrations the same alcohols, or alcohols of similar structure, have been described by monomer-tetramer equilibria based on IR 1 or near-infrared (NIR) 9 measurem ents.…”

Section: Introductionmentioning

confidence: 99%

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Studies of Self-Association in Alcohols (ROH) as Functions of Concentrations and Temperature. Part II: Curve Resolution of Concentration Series

Nodland

2000

Appl Spectrosc

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Self-association of six mono-hydroxyl aliphatic alcohols in CCl4 has been investigated with the use of infrared (IR) spectroscopy and methods for curve resolution. The alcohols were 1-octanol, 1-propanol, 2,4-dimethyl-3-pentanol, 2-methyl-2-propanol, 3-ethyl-3-pentanol, and 3-methyl-2-pentanol. Curve resolution of the OH stretching region assumes that distinct associates due to hydrogen bonding can be regarded as chemical species. The resolution aimed at determining the number, the structure, and the sizes of the associates in different concentration ranges. Analyses of the spectra, in limited concentration ranges, resulted in models containing up to three different species: monomers, open-chain multimers, and cyclic multimers. The size of the multimers was found to increase with increasing alcohol concentration. The resolved concentration profiles enable prediction of molar concentrations of the different alcohol species at all solute concentrations and estimation of the equilibrium constants involved. The molar extinction coefficients for all species at all wavenumbers can also be estimated.

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“…From Roddy and Coleman. 1981. Other types of investigations include calorimetry (Anderson et al, 1975;Spencer et al, 1985;Woolley et al, 1971), NMR (Dixon, 1970;Tucker and Becker, 1973;Fuj iwara and Ikenoue, 1976;Saunders and Hyne, 1958;Griffiths and Socrates, 1966), Raman spectroscopy (Abramczyk et al, 1987), measurements of freezing point depression (Muhammed, 1975), dielectric polarization, dipole moment (Ibbitson and Moore, 1967) static dielectric permittivity (Kunst et al, 1976;Misra et al, 1985) and vapor pressure (Tucker and Becker, 1973;Tucker and Christian, 1977).…”

Section: ~2mentioning

confidence: 99%

Separation of low molecular weight alcohols from dilute aqueous solutions by reversible chemical complexation

Arenson¹,

King²

1989

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The removal of alcohols from dilute solutions has traditionally been performed by distillation. Since this is an energy intensive process, a large amount of the total processing cost is due to the separation and purification of the alcohol. As an alternative to distillation, extraction is investigated from both a process and a chemistry point of view for several alcohols. The goals of the project were to find effective solvent systems for removal of alcohols and to investigate the interactions occurring in the organic phase during extraction. Ethanol was examined both as a model compound and because of the interest in its production by fermentation. The four butanols were extracted in order to investigate the differences in extraction of the various isomers. Several propanols and propanediols were used also. Phenols were found to provide much higher distribution ratios for extraction of ethanol than do other common solvents. Since most phenols are solids at room temperature, a mixed solvent system was employed. It was found that the type of diluent used could have a very large effect on the distribution ratio for the alcohol as well as on the water co-extraction and the solvent loss to the aqueous phase. In extracting the butanol isomers it was found that the indicated activity coefficients in the organic phase were approximately the same when large concentrations of m-cresol were present. This indicates 1 that the majority of the difference in the distribution ratios of the isomers is due to the differences in solvation of butanol in the aqueous phase. A mass-action-law model was used to obtain indicated stoichiometries for the complexes formed in the organic phase between the alcohol and m-cresol. Both multiple linear regression and curvefitting methods were used to find the stoichiometries. The results seem to indicate the presence of a 1:1 alcohol:m-cresol complex with solvation modifications due to the changing concentrations of the components of the organic phase. From the complex formation constants at different temperatures, the enthalpy of complex formation was calculated for the interaction between ethanol and m-cresol. 2 i DEDICATION To Shelley for making it all worthwhile ii ACKNOWLEDGMENTS I would like to acknowledge the support I have received from Professor C. Judson King. His knowledge and experience were invaluable during my graduate career. He allowed both the freedom to pursue ideas and the guidance to keep from straying to far.

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The Association of 3‐ethylpentanol‐3 in Carbon Tetrachloride from the Static Dielectric Permittivity and the Infrared Absorbance

Cited by 21 publications

References 21 publications

Polarisation effects on the solvation properties of alcohols

Polarisation effects on the solvation properties of alcohols

Studies of Self-Association in Alcohols (ROH) as Functions of Concentrations and Temperature. Part II: Curve Resolution of Concentration Series

Separation of low molecular weight alcohols from dilute aqueous solutions by reversible chemical complexation

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