F. Schwager et al., DETERMINATION OF SELF-ASSOCIATION EQUILIBRIUM-CONSTANTS OF ETHANOL BYFTIR SPECTROSCOPY, Journal of physical chemistry, 100(50), 1996, pp. 19268-19272
The self-association of ethanol diluted in CCl4 has been studied by IR
spectroscopy, Three OH stretching bands were assigned to monomers, li
near dimers, and linear multimers. The self-association was described
with two equilibrium constants, one for the formation of dimers, K-2,
the other for the formation of multimers, K-A. These equilibrium const
ants were determined for ethanol concentration ranging from 0.19 to 0.
76 mol L(-1) by using a method developed by Coggeshall and Saier. At T
= 25 degrees C, K-2 was found to be equal to 1.08 L mol(-1) in terms
of molar concentration or 18.3 in terms of molar fraction; K-A was fou
nd to be equal to 3.52 L mol(-1) in terms of molar concentration or 60
.0 in terms of molar fraction. The enthalpy of formation for K-2 was f
ound to be equal to -4.61 kcal mol(-1) and to -4.15 kcal mol-l for K-A
.