Molecular Reorientation of Methanol in Mixtures with Carbon Tetrachloride

Proton and oxygen-17 nmr relaxation rates of CD 3 17 OH as well as deuteron nmr relaxation rates of CH 3 OD were measured in mixtures with carbon tetrachloride at different compositions and temperatures. By varying the 170-content different contributions to the proton relaxation rate could be separated and from the 17 O-H dipolar interaction contribution the correlation time τ 2 OH of the OH bond was determined. Using these correlation times the composition dependence of the deuterium and oxygen-17 quadrupole coupling constants of methanol was derived. A strong variation of the coupling constants over the measured composition range is evident