Cross-disproportionation/combination ratios for CFH2 and CF3 with C2H5 radicals have been determined to be A = 0.032 f 0.012 and A = 0.098 f 0.020, respectively, over the temperature range 25-75°C. For the pathway that yields CFH and CzHs, A = 0.020 f 0.005 a t 25°C.
Disproportionation reactions between alkyl and fluoroalkyl radicals. IV. Pentafluoroethyl and ethyl radicals
✍ Scribed by G. O. Pritchard; V. H. Kennedy; G. M. Heldoorn; M. L. Piasecki; K. A. Johnson; D. R. Golan
- Publisher
- John Wiley and Sons
- Year
- 1987
- Tongue
- English
- Weight
- 552 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0538-8066
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✦ Synopsis
A new determination of the disproportionation/cornbination ratio for C2Fs and CZH, radicals gives a value of A(C2F,, C2H,) = 0.24 5 0.02, independent of temperature. The cross-combination ratio for the two radicals was found to increase with temperature and the significance of this is discussed in evaluating A.
📜 SIMILAR VOLUMES
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Cross-disproportionation to combination ratios for CF2H and n-C3H7 radicals have been determined (the hydrogen acceptor radical is given first) to be A(n-C3H7,CF2H) = 0.30 2 0.01 and A(CF2H, n-C3H7) = 0.057 ? 0.006.
## Abstract Mixtures of 1,1,3,3‐tetrafluoroacetone and perfluorodi‐__n__‐propyl ketone have been photolyzed together over the temperature range 50° to 200°C, and the disproportionation/combination ratio for __n__‐C~3~F~7~ and CF~2~H radicals has been determined to be Δ(__n__‐C~3~F~7~, CF~2~H) = 0.0
New determinations of the disproportionation and combination ratios between CFZH and CzH5 radicals yield (the hydrogen acceptor radical is given first) A(CF2H, CzH5) = 0.068 t\_ 0.008, and A(C2H5,CF2H) = 0.37 t\_ 0.01. A reevaluation of the existing data on CFHP and CF3 radicals leads t o t h e foll
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