The application of the continuous ejection technique to observe unimolecular dissociation of metastable organometallic ions in a Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometer is demonstrated. A radio-frequency ejection voltage is continuously applied at a frequency corresponding to the exact mass of a metastable adduct ion, [MC6H6+]* (M = Cr and Mn), formed in the reactions of Cr+ and Mn+ with C6H6. By monitoring the initial metal ion intensity as a function of ion ejection time, metastable ion lifetimes and unimolecular dissociation rate constants are obtained, The bond dissociation energies D-0(Cr+-C6H6)=1.75 +/- 0.1 eV and D-0(Mn+-C6H6) = 1.50 +/- 0.1 eV are derived from RRKM modeling and are in excellent agreement with other literature values.