Hokmi S, Salehzadeh S, Gholiee Y. The comparison of structure, nature of bond, and electronic transitions in [M(η
5 -Cp)(η
5 -C
60 Me
5 )] (M = Fe
2+ , Ru
2+ , Os
2+ ) hybrids and corresponding metallocenes; a theoretical study.
J Comput Chem 2021;
42:1354-1363. [PMID:
33960496 DOI:
10.1002/jcc.26542]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 03/28/2021] [Accepted: 03/30/2021] [Indexed: 11/07/2022]
Abstract
In this paper, metallocene-fullerene hybrid complexes, [M(η5 -Cp)(η5 -C60 Me5 )] (M = Fe2+ , Ru2+ , Os2+ ), as well as corresponding classical metallocenes have been studied theoretically at BP86/def2-SVP and M06L/def2-SVP levels of theory. With considering these metal complexes as an ABA' system (B is the central metal ion and A and A' are related η5 -ligands), the total interaction energies were calculated using common methods, as well as by calculating the interaction energies between the four defined pairs of fragments including A-B, B-A', A-BA', and AB-A'. The resulting data clearly showed that in all complexes there is a strong anticoopertivity between two metal-(η5 -ligand) bonds. In order to understand the origin of difference in values of various calculated interactions in above two types of complexes, the nature of metal-ligand bonds was also studied using energy decomposition analysis-natural orbital for chemical valence calculations. The results showed that in hybrid complexes, in contrast to metallocenes, the orbital interactions are considerably larger than electrostatic interactions.
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