Journal
JOURNAL OF PHYSICAL CHEMISTRY A
Volume 118, Issue 23, Pages 4056-4062Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp503194v
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Funding
- National Science Foundation [CHE-0845618, PHY-1125844]
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [0845618] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1125844] Funding Source: National Science Foundation
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We present infrared photodissociation spectra of [Co(CO2)(n)](-) ions (n = 3-11) in the wavenumber region 1000-2400 cm(-1), interpreted with the aid of density functional theory calculations. The spectra are dominated by the signatures of a core ion showing bidentate interaction of two CO, ligands with the Co atom, each forming C-Co and O-Co bonds. This structural motif is very robust and is only weakly affected by solvation with additional CO2 solvent molecules. The Co atom is in oxidation state +1, and both CO2 ligands carry a negative charge.
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