...
首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Theoretical investigations of spin-orbit coupling and kinetics in reaction W + NH _3 → N≡WH _3
【24h】

Theoretical investigations of spin-orbit coupling and kinetics in reaction W + NH _3 → N≡WH _3

机译:W + NH _3→N≡WH_3反应中自旋轨道耦合和动力学的理论研究

获取原文
获取原文并翻译 | 示例
           

摘要

The hydrogen-transfer reaction of W + NH _3 incorporates four possible diabatic reaction pathways along with septet, quintet, triplet, and singlet states. The intersystem crossings thus play an important role in the reaction mechanisms. In this work, ab initio and DFT methods are used to determine all possible intermediates, transition states, products, and intersystem crossing points as well as the spin-orbit couplings. The mechanism of hydrogen elimination is further revealed by the natural bond orbital analysis. From the rate constants yielded by a nonadiabatic transition state theory, we find that two intersystem crossings significantly change the reaction pathways. Finally, we suggest a feasible reaction pathway with exothermicity 72.8 kcal/mol, which is consistent with the experimental measurements.
机译:W + NH _3的氢转移反应结合了四种可能的非绝热反应途径,以及七重态,五重态,三重态和单重态。因此,系统间交叉在反应机理中起重要作用。在这项工作中,从头算和DFT方法用于确定所有可能的中间体,过渡态,乘积和系统间交叉点以及自旋轨道耦合。氢消除的机理通过自然键轨道分析进一步揭示。从非绝热过渡态理论得出的速率常数,我们发现两个系统间的交叉显着改变了反应途径。最后,我们提出了一条放热度为72.8 kcal / mol的可行反应途径,与实验测量结果一致。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号