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Kinetics of the Reaction of Atomic Oxygen with Tetramethylsilane

The rate constant for O(2p) 3 P J +(CH 3 ) 4 Si has been measured using the flash photolysis /resonance fluorescence technique over the temperature range 380-700 K. The results are described by k=(5.1±0.7)×10 -11 exp(-24.1±0.6 kJ mol -1 /RT) cm 3 s -1 where the uncertainties represent ±1σ precision. The 95% accuracy interval for k is about ±15%. The results show that the activation energy E a is reduced compared to other hydrocarbons by the trimethylsilyl group.