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On a large difference in enthalpic virial coefficient among some isomers of alkoxyalcohol

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Abstract

Molar excess enthalpies for aqueous solutions of 3-methoxy-1-butanol (3-MB) and 1-methoxy-2-butanol (M-2B) have been measured at 298.15 K over the whole concentration range with a flow microcalorimeter. From the experimental data, we evaluated the enthalpic interaction parameter hxx and obtained the following order:h xx (3 MB) hxx(M-2B)

This large difference in hxx. provided us some new factors which might have the influence on hydrophobic interaction: ‘fundamental frame’, ‘hydroxyl group’, and ‘ether oxygen atom’.

Zusammenfassung

Mittels eines Fluß-Mikrokalorimeters wurden bei 298.15 K im gesamten Konzentrationsintervall die molaren Überschußenthalpien für wäßrige Lösungen aus 3-Methoxy-1-Butanol (3-MB) und 1-Methoxy-2-Butanol (M-2B) gemessen. Anhand der experimentellen Daten erstellten wir den Enthalpiepaar-Wechselwirkungsparameter hxx und erhielten folgende Reihenfolge: hxx(3-MB) ≫ hxx(M-2B)

Diese große Abweichung bei hxx legte uns einige neue Faktoren nahe, die einen Einfluß auf die hydrophobe Wechselwirkung haben können: “Grundgerüst”, “Hydroxylgruppen” als auch “Sauerstoffatome”.

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Hirose, M., Kitao, O. & Nakanishi, K. On a large difference in enthalpic virial coefficient among some isomers of alkoxyalcohol. Journal of Thermal Analysis 38, 1883–1890 (1992). https://doi.org/10.1007/BF01974682

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  • DOI: https://doi.org/10.1007/BF01974682

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