Abstract: Driven by recent advances in ultrafast science, measuring electron motion in molecular systems is becoming feasible. In this talk, I present simulations of coherent electron dynamics in molecules following interaction with intense or high-energy laser pulses. In the strong-field case, a hole created via tunnel ionization can migrate across the molecule with a time scale of a few femtoseconds. For the X-ray pump case, a rapidly created core hole can induce charge migration in the valence electrons faster than the Auger decay time. Our results demonstrate that these coherent hole dynamics have a relatively simple chemical interpretation as a time ​“attochemistry” picture of bond shuffling is a powerful tool for interpreting and predicting attosecond experiments in molecules.