Trimethylnitrosobenzene in CDCI, exists as a mixture of monomer and 2-and E-azodioxy dimers. The dissociation kinetics of both dimers were measured by one-dimensional time-dependent NM R spectroscopy on non-equilibrium solutions, and by two-dimensional exchange spectroscopy (20-EXSY) on equilibrium solutions. 2,4,6-Tri-t-butylnitrosobenzene is entirely monomeric in CDCI, but forms mixed azodioxy dimers in the presence of nitrosobenzene. The dissociation kinetics of the mixed E-dimer were followed by NM R techniques. The activation energy parameters for these dissociation equilibria were compared with previous data on related nitrosobenzene and dimethylnitrosobenzene systems. Paper 9/03957K
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