Molar enthalpies of formation and vaporization of t-butoxybutanes and thermodynamics of their synthesis from a butanol and 2-methylpropene I. Equilibria of synthesis reactions of t-butoxybutanes in the liquid phase

• Published in: The Journal of chemical thermodynamics 1991, Vol.23 (2), p.141-145
• Main Authors: Sharonov, K.G., Mishentseva, Y.B., Rozhnov, A.M., Miroshnichenko, E.A., Korchatova, L.I.
• Format: Article
• Language: English
• Subjects: Chemical thermodynamics; Chemistry; Exact sciences and technology; General and physical chemistry
• ISSN: 0021-9614; 1096-3626
• DOI: 10.1016/S0021-9614(05)80290-3

The equilibria of the synthesis of 1- t-butoxybutane (I), 2-methyl-1- t-butoxypropane (II), and 1-methyl-1- t-butoxypropane (III) from 2-methylpropene (IV), and butan-1-ol (V), 2-methyl-propan-1-ol (VI), and butan-2-ol (VII) in the liquid phase were investigated at temperatures from 315 K to 423 K. On the basis of experimental equilibrium constants found for n(C 4H 9OH)/ n{(CH 3) 2C:CH 2} = 4, values of Δ r H° m and Δ r S° m were calculated. The following results were obtained: Reaction Δ r H m o / ( k J ⋅ m o l − 1 ) Δ r S m o / ( J ⋅ K − 1 ⋅ m o l ) − 1 V + I V = I - 3 4 . 8 ± 2 . 7 - 7 5 . 8 ± 7.7 V I + I V = I I − 36.3 ± 1.8 − 79.6 ± 5.2 V I I + I V = III − 37.7 ± 2.4 − 108.5 ± 7.3