Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 21, Issue 12, Pages 6743-6749Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8cp07748g
Keywords
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Funding
- National Natural Science Foundation of China [21573047]
- Ministry of Science and Technology of China [2012YQ22011307]
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Gaseous TMO(CO)(n)(+) (TM = Sc, Y, La) complex cations prepared via laser vaporization were mass-selected and studied by infrared photodissociation spectroscopy in the C-O stretching frequency region. The structures and vibrational frequencies were calculated by density functional theory to support and interpret the experimental results. The saturated coordination number of CO ligands for ScO(CO)(n)(+), YO(CO)(n)(+) and LaO(CO)(n)(+) was demonstrated to be six, seven and nine, respectively, namely, the nominal 18-, 20- and 24-electron gaseous cation complexes were synthesized. Based on our analysis of the electronic structure, the YO(CO)(7)(+) complex also obeys the 18-electron rule, since one of the occupied valence molecular orbitals is formed only by ligand orbitals. The contribution of 4f orbitals in LaO(CO)(9)(+) accounts for its high coordination number with a 24-electron valence shell.
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