## Abstract In the present paper, kinetic isotope effects of the title reaction are studied with canonical variational transition state theory on the modified Wang Bowman (MWB) potential energy surface (PES) (__Chem Phys Lett__ 2005, 409, 249) and the ab initio calculations at the quadratic configu
Ab initio investigation of the potential energy surfaces of C2H2F2 and C2H2F2+
β Scribed by Gernot Frenking; Wolfram Koch; Michael Schaale
- Publisher
- John Wiley and Sons
- Year
- 1985
- Tongue
- English
- Weight
- 757 KB
- Volume
- 6
- Category
- Article
- ISSN
- 0192-8651
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β¦ Synopsis
Ab initio MO calculations have been performed for neutral and cationic CzHzFz structures. Olefinic and carbene structures are investigated for the neutral isomers, while olefinic, carbene, and fluoronium-type cations are found. Stability orders and rotational barriers are discussed in terms of orbital and Coulomb interaction. Contrary to previous studies, the higher stability of the geminal isomers is interpreted to be caused by Coulomb attraction. ' F H __ __ 18 ( c a t i o n )
The energies, bonding properties, electronic, and geometrical structures, and in some cases rotational barriers, are reported herein.
π SIMILAR VOLUMES
Rate constants for the reactions of atomic oxygen ( 0 3 P ) with C&3F, C&IaCl,C@3Br, 1, l-CzHzFz, and I ,2-C&IzFz have been measured at 307' K using a discharge-flow system coupled to a mass spectrometer. The rate constants for these reactions are (in units of 1011cm3mole-1s-1)2.63 &0.38,5.22 =tO0.2
The poteniiaI surface for the reaction H,CN+H\* -HCN+H + Hz has been studieu by ab initio SCF calculations, using gaussian-type basis functions. A saddle point on the surface has been found, and a reaction path is proposed to explain the observed reIease tii kinetic energy.
A study of stationary points of interest on the surface of (CsHs)s in presented. Reported observations of splittings of lines in the infrared spectrum of the acetylene trimer suggest strongly that there are several conformations of interest that need to be identified. It is confirmed by ab initio ca