title: Characterization of the low-energy electronic excited States of benzoyl-substituted ferrocenes.
abstract: 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.
authors.affiliation: Department of Chemistry, University of Georgia, Athens 30602, USA.
authors.forename: Wei
authors.initials: W
authors.lastname: Ding
authors.forename: Cynthia T
authors.initials: CT
authors.lastname: Sanderson
authors.forename: Richard C
authors.initials: RC
authors.lastname: Conover
authors.forename: Michael K
authors.initials: MK
authors.lastname: Johnson
authors.forename: I Jonathan
authors.initials: IJ
authors.lastname: Amster
authors.forename: Charles
authors.initials: C
authors.lastname: Kutal