Density and ultrasonic velocity measurements in hexyloxybenzylidene phenylazoaniline

The temperature variation of density and ultrasonic velocity of the liquid crystal hexyloxybenzylidene phenylazoaniline are reported. The density across the smectic A-smectic B transition is more predominant than the other transitions. The density variation with temperature and the calculated thermal expansion coefficients suggest that the transitions isotropic liquid-nematic, nematic-smectic A and smectic A-smectic B are of first order. Anomalous behaviour of ultrasonic velocity is observed across the isotropic liquid-nematic transition and prominent dips in velocity are observed at the nematic-smectic A and smectic A-smectic B transitions. The adiabatic compressibility (βad) Rao number (Ra) and molar compressibility (B) are estimated using the experimental density and ultrasonic velocity

Evidence from UV Spectra for d-Orbital Utilization by Sulphur

388-39

Dissociation Constants of Cyanohydrins of Some Tetrahydropyran -4-ones

947-94

Kinetic Evidence for Steric Enhancement of Resonance in Ti(III) Reduction of Substituted Methyl Phenyl Sulphoxides

88