Characterization of the Low-Energy Electronic Excited States of Benzoyl-Substituted Ferrocenes

Resonance Raman spectroscopy has been employed to probe the excited-state distortions associated with the low-energy electronic transition of benzoylferrocene and 1,1‘-dibenzoylferrocene. Resonance intensity enhancement of in-plane ligand modes, in general, and the carbonyl stretching mode, in parti...

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Bibliographic Details
Published in:Inorganic chemistry 2003-03, Vol.42 (5), p.1532-1537
Main Authors: Ding, Wei, Sanderson, Cynthia T, Conover, Richard C, Johnson, Michael K, Amster, I. Jonathan, Kutal, Charles
Format: Article
Language:English
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Summary:Resonance Raman spectroscopy has been employed to probe the excited-state distortions associated with the low-energy electronic transition of benzoylferrocene and 1,1‘-dibenzoylferrocene. Resonance intensity enhancement of in-plane ligand modes, in general, and the carbonyl stretching mode, in particular, supports the proposal that the excited state populated by this transition contains appreciable metal-to-ligand charge transfer character. The redistribution of charge that occurs upon populating this state weakens the metal−ring bonding and facilitates the loss of a benzoylcyclopentadienide anion. This photochemical reaction has been investigated by an on-line electrospray ionization mass spectrometry technique that allows direct detection of primary and secondary products with solution lifetimes down to the millisecond range.
ISSN:0020-1669
1520-510X
DOI:10.1021/ic020639z