Abstract
An examination of the reaction pathway in the 2+1 multiphoton dissociation of a series of related iron tricarbonyl organometalliccomplexes is reported. The study includes the use of pressure-dependent measurements and the application of RRKM theory to explore the reaction mechanism. It is concluded on the basis of the relative intensities of the observed iron electronic transition and the statistical calculations, that ground-state molecular fragments are produced via a statistical, stepwise pathway and that the Fe final product states result from further direct excitation to a dissociative channel. This conclusion contrasts with recent studies of Cr(CO) 6 which indicate that two different mechanisms are active, leading to different product quantum states.
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