  Ultrashort pulses can excite or ionize molecules and populate coherent
electronic wavepackets, inducing complex dynamics. In this work, we simulate
the coupled electron-nuclear dynamics upon ionization to different electronic
wavepackets of (deuterated) benzene and fluoro-benzene molecules, quantum
mechanically and in full dimensionality. In fluoro-benzene, the calculations
unravel both inter-state and intra-state quantum interferences that leave clear
signatures of attochemistry and charge-directed reactivity in the shape of the
autocorrelation function. The latter are in agreement with experimental high
harmonic spectroscopy measurements of benzenes and fluoro-benzene.
