An examination of the heats of formation for CH3CO and CF3CO radicals
โ Scribed by J.S. Francisco; N.J. Abersold
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 399 KB
- Volume
- 187
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
โฆ Synopsis
The heats of formation for CHsCO and CFsCO molecules have been determined using ab initio molecular orbital calculations from isodesmic schemes. The heat of formation for CHJCO has been calculated as -4.2 +2 kcal mol-', which is in good agreement with experiment and that for CF,CO as -139.9 f 2 kcal mol-' at 298 K.
๐ SIMILAR VOLUMES
The equilibrium for proton transfer involving acetone and ketene (CH$OCHsH++ CH2CO -CH$O++ CHsCOCH3) has been studied in a pulsed ion cyclotron resonance spectrometer. Vtiues of 193.6 r I and 194.1 c 1 kcal/mole (1 kcal/mole = 4.18 kjoules) are obtained for the proton affinities of acetone and keten
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
CF 3 O 2 CF 3 was photolyzed at 254 nm in the presence of CO in 760 torr N 2 or air at 296 K in a static reactor. In N 2 , the products CF 3 OC(O)C(O)OCF 3 and CF 3 OC(O)O 2 C(O)OCF 3 were detected by FTIR spectroscopy. In air, the only observed products were CF 2 O and CO 2 and a chain process, ini