Dipolar association of pyridine N-oxide in benzene at 25°C

Abstract The dipolar association of pyridine N-oxide in benzene solution over the concentration range 0.03 − 0.6 mol. kg −1 was investigated by vapour pressure osmometry. The practical molal osmotic and activity coefficients were determined. The equilibrium constant for self-association K is 1.52 ± 0.17 kg. mol −1 .