Abstract
Heats of mixing of the binary mixtures ofn-, sec-, iso- andt-butylamines with methanol were determined in the entire concentration range. All the four systems showed a strong exothermic behaviour. The exothermic heats of mixing vary in the ordert-BuNH2 >n-BuNH2 > sec-BuNH2 > iso-BuNH2. The enthalpy of hydrogen bond in the methanol-butylamine complexes was calculated by means of a thermochemical cycle and found to vary in the ordert-BuNH2 >n-BuNH2 > iso-BuNH2 > sec-BuNH2. This order is different than that found for the hydrogen bond due to self-association. The difference has been explained in the light of steric and electromeric effects arising out of the substitution of the methyl groups in the alkyl chain of the butylamine.
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NCL Communication No. 2356 (Part of the Ph.D. Thesis submitted to the Bombay University by the first author).
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Pradhan, S.D., Mathur, H.B. Thermodynamic study of binary mixtures of isomeric butylamines with methanol enthalpy of hydrogen bonded complex. Proc. Indian Acad. Sci. (Chem. Sci.) 88, 337–350 (1979). https://doi.org/10.1007/BF02844712
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DOI: https://doi.org/10.1007/BF02844712