Reduced-Dimensionality Quantum Dynamics Study of the 3Fe(CO)4 + H2 → 1FeH2(CO)4 Spin-inversion Reaction

Molecules

Yuya Watabe¹  Takaaki Miyazaki¹  Toshiyuki Takayanagi¹ 

[1] Department of Chemistry, Saitama University, Shimo-Okubo 255, Sakura-ku, Saitama 338-8570, Japan;

关键词: spin crossover;    spin inversion;    reaction dynamics;    nonadiabatic transition;    spin-orbit coupling;    wave packet;    crossing point;    cumulative reaction probability;   

DOI  :  10.3390/molecules25040882

来源: DOAJ

【 摘 要 】

Many chemical reactions of transition metal compounds involve a change in spin state via spin inversion, which is induced by relativistic spin-orbit coupling. In this work, we theoretically study the efficiency of a typical spin-inversion reaction, ³Fe(CO)₄ + H₂ → ¹FeH₂(CO)₄. Structural and vibrational information on the spin-inversion point, obtained through the spin-coupled Hamiltonian approach, is used to construct three degree-of-freedom potential energy surfaces and to obtain singlet-triplet spin-orbit couplings. Using the developed spin-diabatic potential energy surfaces in reduced dimensions, we perform quantum nonadiabatic transition state wave packet calculations to obtain the cumulative reaction probability. The calculated cumulative reaction probability is found to be significantly larger than that estimated from the one-dimensional surface-hopping probability. This indicates the importance of both multidimensional and nuclear quantum effects in spin inversion for polyatomic chemical reaction systems.

【 授权许可】

Unknown