Application of the stabilization method to temporary anion states of pi-ligand transition-metal carbonyls in density functional theory.
In this paper, density functional theory is used to investigate (benzene)chromium tricarbonyl, (cyclopentadienyl)manganese tricarbonyl, (1,3-butadiene)iron tricarbonyl, and (cyclopentadienyl)cobalt dicarbonyl. For the energies of low-lying temporary anion states, the stabilized Koopmans-based (S-KB) and stabilized Koopmans theorem (S-KT) methods are adopted. Stabilization is accomplished by varying the exponents of appropriate diffuse functions. Results indicate that the calculations of S-KB using PBEPBE and S-KT using CAM-B3LYP are able to yield energies of temporary anion states in good agreement with the experimental values. Furthermore, the ionization potentials can be determined accurately via the Koopmans-based (KB) PBEPBE method.
Department of Chemistry, Tunghai University, Taichung 40704, Taiwan. hycheng@thu.edu.tw
Hsiu-Yao
HY
Cheng
Jung-Tzu
JT
Chang
Chun-Chi
CC
Shih