A theoretical mechanistic study for C H and C C bond activations of cyclohexane catalyzed by NiAl + in the gas phase
| Autor: | Xiao-Xia Zhang, Zhi-Yuan Geng, Yong-Ning Yuan, Yu-Xiu Nie, Guang-Ying Wang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Nial
Cyclohexane Regioselectivity Infrared spectroscopy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Biochemistry 0104 chemical sciences chemistry.chemical_compound chemistry Heteronuclear molecule Physical chemistry Density functional theory Molecular orbital Singlet state Physical and Theoretical Chemistry 0210 nano-technology computer computer.programming_language |
| Zdroj: | Computational and Theoretical Chemistry. 1129:48-56 |
| ISSN: | 2210-271X |
| DOI: | 10.1016/j.comptc.2018.02.015 |
| Popis: | The first thorough theoretical mechanism analysis of heteronuclear bimetallic cation NiAl+ with cyclohexane has been investigated on singlet and triplet potential energy surfaces (PESs) by using density functional theory. Our calculated results show that NiAl+ can assist in the decomposition of cyclohexane to form benzene through two types of reaction channel: C H bond activation and H2 formation; C C bond activation and HD formation. The most important conclusion is that NiAl+ exhibits high efficiency and also high regioselectivity for C H bond oxidation. However, the high zero-point vibrational energy (ZPVE) value for the cleavage of inert C C bond is also the origin of its failure to form HD. In the process of the first C H and C C bond activations, crossing points (CPs) have been appeared between the two adiabatic surfaces, respectively. The minimum energy crossing points (MECPs) are gotten using the algorithmin Harvey method. Density of states (DOS) is used to obtain a deeper understanding for the roles of the front molecular orbital of the initial complexes. The bonding properties of the special intermediates involved in the process of C C bond activations are discussed by the IR spectrum methods. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect