𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Substituent effects on the disproportionation-combination rate constant ratios for gas-phase halocarbon radicals. IV. Reactions of ·CF3 + CF3CH2CF2· and CF3CH2CF2· + CF3CH2CF2·

✍ Scribed by Shane R. Smith; Bert E. Holmes

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
161 KB
Volume
31
Category
Article
ISSN
0538-8066

No coin nor oath required. For personal study only.

✦ Synopsis

Rate constant ratios, k d /k c , for the disproportionation/combination reaction at a temperature of 295 Ϯ 2 K, have been measured as 0.034 Ϯ 0.009 for the collision between CF 3 CH 2 CF 2 ϩ CF 3 radicals and as 0.075 Ϯ 0.019 for CF 3 CH 2 CF 2 ϩ CF 3 CH 2 CF 2 radicals. The effect of the two fluorine substituents on the rate constant ratio is compared to previous k d /k c s with CF 3 CH 2 CH 2 , CF 3 CH 2 CHCl, and CF 3 CH 2 CHCF 3 radicals.

📜 SIMILAR VOLUMES

Substituent effects on the disproportion
Substituent effects on the disproportionation-combination rate constant ratios for gas-phase halocarbon radicals. Part III: Reactions of CF3 + CF3CH2 CHCF3 and CF3 CH2CHCF3 + CF3CH2 CHCF3
✍ Derek R. McDowell; Bert E. Holmes 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 412 KB 👁 2 views

Disproportionationkombination rate constant ratios, kd/&[, for the reactive collision between CF3CH2CHX + CF, radicals and between CF3CH2CHX + CF3CH2CHX radicals have been measured for X = CF, The kd/k, = 0.066 -t 0 01 3 when H is transferred to the CF3 radical and 0 I25 ? 0.025 for H transfer to th

Rate constants for the reactions of OH r
Rate constants for the reactions of OH radicals with CH3OCF2CF3, CH3OCF2CF2CF3, and CH3OCF(CF3)2
✍ K. Tokuhashi; A. Takahashi; M. Kaise; S. Kondo; A. Sekiya; S. Yamashita; H. Ito 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 133 KB 👁 1 views

The rate constants for the reactions of OH radicals with CH 3 OCF 2 CF 3 , CH 3 OCF 2 CF 2 CF 3 , and CH 3 OCF(CF 3 ) 2 have been measured over the temperature range 250-430 K. Kinetic measurements have been carried out using the flash photolysis, laser photolysis, and discharge flow methods combine

Difluoromethylation of Amines with Zn(CF
Difluoromethylation of Amines with Zn(CF3)Br · 2 CH3CN, Cd(CF3)2 · 2 CH3CN and the System Bi(CF3)3/AlCl3
✍ S. V. Pasenok; N. V. Kirij; Yu. L. Yagupolskii; D. Naumann; W. Tyrra; A. Fitzner 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 German ⚖ 93 KB

The reactions of Zn(CF 3 )Br ´2 CH 3 CN, Cd(CF 3 ) 2 ´2 CH 3 CN or Bi(CF 3 ) 3 /AlCl 3 with tertiary amines lead to the formation of quaternary ammonium salts of the general formula [R 3 NCF 2 H]X. The reaction of 4-N,N-dimethylaminopyridine with Zn(CF 3 )Br ´2 CH 3 CN yields (Ndifluoromethyl)-4-N,N

Kinetics of the gas-phase reaction of CF
Kinetics of the gas-phase reaction of CF3CF2CH2OH with OH radicals and its atmospheric lifetime
✍ L. Chen; K. Fukuda; N. Takenaka; H. Bandow; Y. Maeda 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 79 KB 👁 1 views

CF 3 CF 2 CH 2 OH is a new chlorofluorocarbon (CFC) alternative. However, there are few data about its atmospheric fate. The kinetics of its atmospheric oxidation, the OH radical reaction of CF 3 CF 2 CH 2 OH, has been investigated in a 2-liter Pyrex reactor in the temperature range of 298 ϳ 356 K u