At Ihe MP4/6-31 lC\*\*//6-31C\* thcoretlul level. CH:' and CH:'hsve relallvely large brrners towards proton IOU. despite the high evofhermicity of these reactions. In contrast, this activation bnrner for C#'IS very small and CH'\*only has a purely repulswe polentlal carve. CH? prefers a square plana
The structure and stability of the acetylene dication
β Scribed by John A. Pople; Michael J. Frisch; Krishnan Raghavachari; Paul V. R. Schleyer
- Publisher
- John Wiley and Sons
- Year
- 1982
- Tongue
- English
- Weight
- 257 KB
- Volume
- 3
- Category
- Article
- ISSN
- 0192-8651
No coin nor oath required. For personal study only.
β¦ Synopsis
Abstract
The dication C~2~H has been investigated by ab initio molecular orbital theory. It is found to have a linear (D~βh~), structure with a triplet (^3^Ο^β^~g~) ground state. Deprotonation to C~2~H^+^ is exothermic by 9.8 kcal/mol, but this process is hindered by a large barrier of 65 kcal/mol.
π SIMILAR VOLUMES
High-level ab initio molecular-orbital calculations indicate that the only C2H4 2+ isomer likely to be observable in the gas phase is the perpendicular ethylene dication (1). Other C,H:+ isomers lie higher in energy with extremely small barriers for collapse to 1.