The thermodynamic parameters of vitrification of liquid 1-methyl-1-chlorocyclopentane and 1-methylcyclopentanol

The heat capacity of 1-methylcyclopentanol was measured on a triple heat br idge unit in the temperature range 290-380 K, and the thermodynamic charact eristics of its vitrification were estimated. A procedure for calculating t he enthalpy of formation of holes (molecular vacancies) and the volume rati o between molecules and holes in liquid 1-methyl-1-chlorocyclopentane and 1 -methylcyclopentanol is suggested; the calculations use the heat capacity j ump of the glass --> metastable liquid phase transition and the enthalpies of vaporization of the substances. The orientation components of the residu al entropies of the compounds in the vitreous state were determined.