Excess Volumes and Isentropic Compressibilities of Binary Mixtures of Butylamine and Cyclic Ketones

Excess volumes and isentropic compressibilities for the binary mixtures of cyclohexanone, cylopentanone and 2-methylcyclohexanone with butylamine were determined at 303�15 and 313�15 K. Excess volumes of the three mixtures are negative over the whole range of compositions at both the temperatures. Deviations in isentropic compressibility are also negative in all the three mixtures. The results are ascribed to strong hydrogen bonding between unlike molecules. The results also suggest that cyclization decreases both √E and the deviation in isentropic compressibility.