Kinetic-energy, femtosecond resolved reaction dynamics. Modes of dissociation (in iodobenzene) from time-velocity correlations

We report on the use of ‘2D’ time-velocity correlations to study in real time the dynamics of reactions with multiple channels. By resolving the kinetic energy on the femtosecond time scale we are able to directly identify the direct-mode and complex-mode dissociation pathways of iodobenzene. The coherent wave packet dynamics and the nature of IVR in the benzen ring are discussed and related to the experimental observations.