Proton magnetic relaxation in toluene and some derivatives

Abstract

Spin-lattice relaxation time studies are reported of protons in solid solutions of toluene in toluene-d₈, and of the derivatives C₆F₅CH₃, C₆H₅CF₃, 2-C₆H₄FCF₃, 2-C₆H₄ClCF₃, 2-C₆H₄FCH₃, 3-C₆H₄FCH₃, 4-C₆H₄FCH₃, 2,3,5,6-C₆HF₄CH₃, 2-C₆H₄ClCH₃, 2,6-C₆H₃Cl₂CH₃ and 2,6-C₆H₃ClFCH₃.

The temperature dependence of the relaxation times reflects the molecular motions occurring in the crystalline state and yields values for the hindering potential barriers. The data are correlated with the molecular structures and the importance of intermolecular effects demonstrated. Some new thermal data are also presented.