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Journal of the Chilean Chemical Society

versión On-line ISSN 0717-9707

Resumen

TAN, XIAO JUN et al. A THEORETICAL STUDY ON THE MECHANISM OF THE ADDITION REACTION BETWEEN CYCLOPROPENYLIDENE AND ETHYLENE. J. Chil. Chem. Soc. [online]. 2012, vol.57, n.2, pp. 1174-1177. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072012000200025.

The reaction mechanism between cyclopropenylidene and ethylene has been systematically investigated employing the MP2/6-311+G* level of theory to better understand the cyclopropenylidene reactivity with unsaturated hydrocarbons. Geometry optimization, vibrational analysis, and energy property for the involved stationary points on the potential energy surface have been calculated. Energies of all the species are also further refined by the CCSD(T)/6-311+G* single-point calculations. Firstly, one important reaction intermediate (INTa) has been located via a transition state (TSa). After that, the common intermediate (INTb) for the two pathways (1) and (2) has been formed via TSb. At last, two different products possessing three- and four-membered ring characters have been obtained through two reaction pathways. In the reaction pathway (1), a three-membered ring alkyne compound has been obtained. As for the reaction pathway (2), a four-membered ring conjugated diene compound has been formed, which is the most favorable reaction to occur from the kinetic and thermodynamic viewpoints.

Palabras clave : Cyclopropenylidene; Ethylene; Addition reaction; Theoretical study.

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