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Excess enthalpies of binary mixtures of butylamines + propanols at 298.15 K

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Abstract

The molar excess enthalpies of eight systems of butylamines + propanols were determined at 298.15 K using a twin-microcalorimeter. All excess enthalpies were exothermic and large. An equilibrium constant K 1 expressed in terms of mole fractions and standard thermodynamic properties of formation (Δf H, Δf G, Δf S) of 1:1 complex were evaluated by ideal mixtures of monomeric molecules and their associated complexes. Concentration dependence of the FT-Raman spectrum showed systematic changes of bands. Spectroscopic considerations based on this and ab initio calculations on molecules were performed at the Mp2/6-311G(d,p) level of theory. Interaction energies between butylamine and propanol were calculated by the supermolecular and NBO methods. The results were discussed with previous results to clarify the steric and positional effect of the amino and hydroxyl group.

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Authors and Affiliations

  1. Kinki University, Higashiosaka, Osaka, Japan

    Takayoshi Kimura, Tasunori Suzuki, Keisuke Takata, Akina Soga, Yutsa Nomoto, Tadashi Kamiyama, Yousuke Nakai, Hideo Matsui & Masao Fujisawa

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  1. Takayoshi Kimura
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  2. Tasunori Suzuki
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  3. Keisuke Takata
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  4. Akina Soga
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  5. Yutsa Nomoto
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  6. Tadashi Kamiyama
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  7. Yousuke Nakai
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  8. Hideo Matsui
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  9. Masao Fujisawa
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Correspondence to Takayoshi Kimura.

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Kimura, T., Suzuki, T., Takata, K. et al. Excess enthalpies of binary mixtures of butylamines + propanols at 298.15 K. J Therm Anal Calorim 113, 1467–1474 (2013). https://doi.org/10.1007/s10973-013-3226-9

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  • DOI: https://doi.org/10.1007/s10973-013-3226-9

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