Dimethylphenylsilyl hydrotrioxide

Si NMR of dimethylphenylsilyl hydrotrioxide 20a and some analogous organosilicon peroxides and other derivatives. The relevant NMR data are collected in Table 7. 

The kinetic and activation parameters for the decomposition of dimethylphenylsilyl hydrotrioxide involve large negative activation entropies, a significant substituent effect on the decomposition in ethyl acetate, dependence of the decomposition rate on the solvent polarity (acetone-rfe > methyl acetate > dimethyl ether) and no measurable effect of the radical inhibitor on the rate of decomposition. These features indicate the importance of polar decomposition pathways. Some of the mechanistic possibilities involving solvated dimeric 71 and/or polymeric hydrogen-bonded forms of the hydrotrioxide are shown in Scheme 18. 

N, A, -Dimethyl-p-phenylenediamine dihydrochloride, hydroperoxide determination, 678 Dimethylphenylsilyl hydrotrioxide... 

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