Author's Final Manuscript
Journal of Magnetic Resonance
Proton spin-lattice relaxation rates R = T1−1 have been measured in powdered samples of 4-methyl-2,6-di-tertiarybutyl phenol between 77 and 170 K. Deuteration of the hydroxy proton leads to a large change in R in the vicinity of the 120-K R maximum and in the high-temperature region. The data are successfully, although probably not uniquely, fitted and the interpretation suggests that in addition to the motion of the hydroxy proton playing a significant role in the relaxation, the two pairs of t-butyl methyl groups also contributing are inequivalent. The departure, at low temperatures, from an ω−2dependence of R where ω is the nuclear Larmor angular frequency is also investigated.
Beckmann, Peter A. 1979. "Proton spin relaxation and methyl and hydroxy group motion." Journal of Magnetic Resonance 36.2: 199-205.