Intramolecular vibrational dynamics in bis(trifluoromethyl)keten excited by resonant femtosecond IR radiation

► Intramolecular vibrational redistribution in (CF3)2CCO induced by IR femtosecond radiation. ► Mode-selective excitation of resonant ν1 mode. ► IVR time 5 ps is measured for ν1 mode. ► Kinetics of IVR is different for different modes.