  The dynamics following laser-induced molecular photodissociation of gas-phase
CH$_{2}$BrI at 271.6 nm were investigated by time-resolved Coulomb explosion
imaging using intense near-IR femtosecond laser pulses. The observed
delay-dependent photofragment momenta reveal that CH$_{2}$BrI undergoes C-I
cleavage, depositing 65.6% of the available energy into internal product
states, and that absorption of a second UV photon breaks the C-Br bond of
CH$_{2}$Br. Simulations confirm that this mechanism is consistent with previous
data recorded at 248 nm, demonstrating the sensitivity of Coulomb explosion
imaging as a real-time probe of chemical dynamics.
