Investigations of the autoassociation of phenol by the NMR method

1. The chemical shift of the OH group of the phenol monomer was determined. 2. In phenolinert solvent systems a monomer-trimer equilibrium is observed, with the exception of low concentrations of phenol (~0.03 mole fraction). 3. The chemical shift of the signal of the OH group of the phenol trimer depends on the temperature. 4. The solvent CCl4 is not entirely inert. 5. The constants and thermodynamic parameters of association in systems of phenol and in inert solvent were determined. 6. In all the systems studied the enthalpy remains constant, while the entropy varies from system to system.