Arrhenius parameters have been determined for the hydrogen-abstraction reactions: R + SiHCI, + RH + SiCl, CF, 323-46 1 5.98 & 0.06 11.77 f 0.03 8.50 CH, 333-443 4.30 f 0.08 10.83 & 0.04 8.48 C,H, 314-413 5.32 & 0.07 11.54 f 0.04 8.63 7 - l h e trend in activation energies ECH, < E c ~H , < ECF, is
Hydrogen abstraction reactions from organosilicon compounds. The reactions of fluoromethyl radicals with trichlorosilane. The photolyses of di- and tetrafluoroacetone
β Scribed by J. A. Kerr; D. M. Timlin
- Publisher
- John Wiley and Sons
- Year
- 1971
- Tongue
- English
- Weight
- 638 KB
- Volume
- 3
- Category
- Article
- ISSN
- 0538-8066
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β¦ Synopsis
The photolyses of 1,3-difluoro-and 1,1,3,3-tetrafluoroacetone have been reinvestigated as sources of fluoromethyl radicals, and the following rate constant ratios were determined: (1) (2) 2CHzF + CHZFCH*F* CHzF + CHzFCOCHzF -+ CHsF + CHFCOCHzF log kl/k21~2 = (3.6 f 0.1) -[(7.6 + 0.2)/0]$
π SIMILAR VOLUMES
The photolysis of 1,1,3,3-tetrafluoroacetone has been reinvestigated as a source of CHFz radicals at temperatures up to 578'K, and the following rate constant ratio was determined for the reactions (8) (7) 2CHF2 -+ CHFzCHFz\* CHFz + CHFzCOCHFz -+ CHzFz + CF~COCHFZ log (k~/k~1'2)(mole-1'zcc1'2sec-1'2
The following hrrhenius parameters have been determined for the hydrogen-abstraction reactions: CF,
The kinetics of chlorine atom abstraction from the chloromethanea (ClM), CCl,, CHCl,, CHZC12, and CH3Cl by radiolytically generated trichlorosilyl radicals was studied in the liquid phase by a competitive method. Arrhenius parameters of chlorine atom abstraction from chloroinethanes relative to that
The hydrogen abstract reactions of OH radicals with HOF (R1), HOCl (R2), and HOBr (R3) have been studied systematically by a dual-level direct-dynamics method. The geometries and frequencies of all the stationary points are optimized at the MP2/6-311+G(2d, 2p) level of theory. A hydrogen-bonded comp
## Abstract The conformational potential energy surfaces for monoβ and difluoromethyl formate have been determined by using a modified G2(MP2) level of calculations. The structures and vibrational frequencies for the conformers of monoβ and difluoromethyl formate have been reported. The hydrogen ab