Unexpected and Delayed Fragmentation Dynamics of the Organometallic Ferrocene Induced by Ion-Collision.

We have investigated the fragmentation dynamics of the organometallic ferrocene molecule after interaction with multiply charged ions using multicoincidence mass spectrometry and quantum chemistry calculations. We observed unexpected fragmentation dynamics of the two-body breakup channels from ferrocene dications revealing a charge screening effect from the iron atom and delayed fragmentation dynamics. These observations are rationalized through the population of a specific long-lived excited state, where one positive charge is located on each cyclopentadienyl ring. Combined experiment/theory study on ionized ferrocene molecules. We found that, due to the population of a specific long-lived excited state, charge screening effects from the iron atom and delayed fragmentations occur leading to unexpected dynamics.