The electro optic Kerr constant of many new organic solutions comprisi
ng of tile substituted aromatic carbonyl and nitrile compounds as solu
tes in nitrobenzene, for various molar concentrations of the solutes h
as been measured. We found several solutions hating Kerr constants gre
ater than that of nitrobenzene. The interactions bet seen the componen
ts in these solutions have been established to be dipole-dipole in nat
ure for the first time by conducting experiments and measuring the dip
olemoments for solutions of various molar concentrations. The variatio
ns of the dipole moment with concentration in many solutions have been
found to follow the same trend of variations of Kerr constant with mo
lar concentration.