Investigation of Photo-Induced C-H Bond Activating by CpRh(CO)2 Complex Using Density Functional Theory

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Abstract:

The charge transfer and structural distortions that occurred in the complex CpRh(CO)2 upon excitation with an light irradiation were studied by density functional theory (DFT). The calculations showed that the electrons transferred from Cp to CO ligands with the transition of CpRh(CO)2 from ground state to the first excited state. Accompanying with this transfer process, CpM(CO)2 became distorted and the linear bond of M-CO became bent upon excitation. The second excitation is the strongest excitation which is identified to be metal to ligand CO charge transfer (MLCT) excitations. We also found the lowest excited state has little effect for the M-CO bond photoactivation while the photodissociation of CO from CpM(CO)2 can be achieved in the second excited state.

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170-173

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July 2011

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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[1] W. Jones: Isotope Effects in C−H Bond Activation Reactions by Transition Metals. Acc. Chem. Res. 36, 2(2003), pp.140-146.

DOI: 10.1021/ar020148i

Google Scholar

[2] A. J. Lees: Quantitative photochemistry of organometallic complexes: insight to their photophysical and photoreactivity mechanisms. Coord. Chem. Rev. 211, 1(2001), pp.255-278.

DOI: 10.1016/s0010-8545(00)00283-6

Google Scholar

[3] A. J. Esswein, D. G. Nocera: Hydrogen Production by Molecular Photocatalysis. Chem. Rev. 38, 50(2007), pp.4022-4047.

DOI: 10.1021/cr050193e

Google Scholar

[4] N. Dunwoody, S. Sun, A. J. Lees: Quantitative Photochemistry and Mechanisms for a Series of Rhodium Dicarbonyl Derivatives. Inorg. Chem. 39, 20(2000), pp.4442-4451.

DOI: 10.1021/ic000395n

Google Scholar

[5] J. S. Bridgewater, T. L. Netzel, J. R. Schoonover, S. M. Massick, and P. C. Ford: Time-Resolved Optical and Infrared Spectral Studies of Intermediates Generated by Photolysis of trans-RhCl(CO)(PR3)2. Roles Played in the Photocatalytic Activation of Hydrocarbons. Inorg. Chem. 40, 7(2001), pp.1466-1476.

DOI: 10.1021/ic001298x

Google Scholar

[6] A. Vlcek, S. Zalis: Modeling of charge-transfer transitions and excited states in d6 transition metal complexes by DFT techniques. Coord. Chem. Rev. 251, 3-4(2007), pp.258-287.

DOI: 10.1016/j.ccr.2006.05.021

Google Scholar