Excess volumes and viscosities of mixtures of nitrobenzene and certain aromatic bases

Excess molar volumes V-E, excess viscosities eta(E), excess Gibbs energy changes for viscous flow Delta G(double dagger E) and interaction parameters d for binary mixtures of nitrobenzene with aniline, N-methylaniline and m-chloroaniline at selected compositions were determined from the measured values of densities and viscosities of pure components and their mixtures at 30 degrees C. UV-visible spectra for all the binary mixtures were recorded and showed a characteristic absorption maximum. The results are analyzed in terms of interactions arising due to electron-donor-acceptor (EDA) or charge transfer (CT) complexation.