CALORIMETRIC STUDY OF NITRILE-CHLORO GROUP-INTERACTIONS - COMPARISON WITH DISQUAC PREDICTIONS

Excess enthalpies, H-E, at 298.15 K and atmospheric pressure are repor ted for binary liquid mixtures of alkanenitrile + 1-chloroalkane. Thes e experimental results, along with literature data on excess Gibbs ene rgies, G(E), are interpreted in terms of the DISQUAC group contributio n model. The systems are characterized by three types of contact surfa ces: nitrile (CN), chloro (Cl) and alkane. The interchange energy para meters of the alkane/CN and alkane/Cl contacts were determined indepen dently from the study of n-alkane + nitrile and n-alkane + chloroalkan e systems. The interaction parameters of the CN/Cl contacts are report ed in this work. The quasi-chemical parameters are constant. The dispe rsive parameters depend on the environment of the CN and Cl groups. Th e model provides a fairly consistent description of the experimental d ata.