Abstract The i.r. spectrum of water in four organic solvents has been carefully recorded in the v(OH) region. Dipole correlation functions obtained through Fourier transform of the high-frequency side of the v 3 band confirm essentially free rotation of water in the two non-polar solvents chloroform and carbontetrachloride, on a time scale of the order 0.1 psec. In dioxane solution, a shoulder observed on the high-frequency side of the v 3 band, similar to that observed in the pure liquid, is assigned to non-H-bonded molecules. It is suggested that exchange motions between free and H-bonded species in dioxane solution and in the pure liquid, affect the position and width of this shoulder component, and also the overall band shapes. The effect occurs on a time-scale of the order 0.1 psec.