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Absolute rate constants for reactions of free radicals in the high-temperature photolysis of formamide vapor. II. Amino radicals

✍ Scribed by R. A. Back; T. Yokota

Publisher: John Wiley and Sons
Year: 1973
Tongue: English
Weight: 376 KB
Volume: 5
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550050612

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✦ Synopsis

The rotating-sector method has been applied to the photoinitiated radical-chain decomposition of formamide at 300°C to measure the rate constant for the bimolecular disappearance of NH2 radicals. The decomposition is propagated by the reactions

Conditions were chosen so that reaction (1) was rate controlling and NH? the terminating radical. A flow system was employed with CZFG as a carrier qas at a pressure of 300 Torr, and the chain reaction was initiated by the photolysis of either formamide or NH3. A value of 4.7( K2.0) X 10'O (M .sec)-l was estimated for the termination reaction

and a value of 8.4 x 1 0 6 (M.sec)-l for reaction ( I ) in the same system, both at 300°C.

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Absolute rate constants for reactions of free radicals in the high-temperature photolysis of formamide vapor. Part I. Carbamyl radicals

✍ T. Yokota; R. A. Back 📂 Article 📅 1973 🏛 John Wiley and Sons 🌐 English ⚖ 503 KB

The photolysis of formamide vapor at 2062 has been studied in a flow system with results essentially similar to those obtained previously under static conditions and higher conversions. The rotating-sector technique has been applied to the radical-chain decomposition of formamide under conditions (3

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Absolute rate constants for the reactions of O(3P) atoms and OH radicals with SiH4 over the temperature range of 297–438°K

✍ R. Atkinson; J. N. Pitts Jr. 📂 Article 📅 1978 🏛 John Wiley and Sons 🌐 English ⚖ 444 KB 👁 2 views

Absolute rate constants for the reaction of SiH4 with O(3P) atoms and OH radicals have been determined over the temperature range 297"438'K using flash photolysis-NO:! chemiluminescence and flash photolysis-resonance fluorescence techniques, respectively. The Arrhenius expressions obtained are wher