The effect of deuteration on the multiphoton dissociation of benzene chromium tricarbonyl

Brian Samoriski, Jeanne M. Hossenlopp, Dan Rooney, J. Chaiken

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


We have measured one color multiphoton dissociation ionization (MPD/MPI) spectra for h6-benzene chromium tricarbonyl (h6-BCT) and d6-benzene chromium tricarbonyl (d6-BCT). These spectra reveal that the vibrational properties of the ligands determine the distribution of metal atom states formed by MPD of organometallic molecules. Pressure studies demonstrate that the observed effects manifest isolated molecule dynamics and that excited triplet states are probably not involved in those dynamics. Laser power dependence studies show that the observed branching between MPD production of ground state chromium atoms vs excited state atoms is a function of multiphoton excitation rate. It seems likely that photodissociation on potential surfaces corresponding to excited electronic states can occur before intramolecular energy redistribution is complete. Two mechanisms consistent with our results are suggested. One is very unique for MPD/MPI experiments in that ladder crossing based on dissociation is not the source of the branching between observed products.

Original languageEnglish (US)
Pages (from-to)3326-3330
Number of pages5
JournalThe Journal of Chemical Physics
Issue number6
StatePublished - 1986

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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