The creation of an electronic wavepacket can be achieved following the interaction of a molecule with an attosecond laser pulse that ionizes the molecule. Such a photoionization is able to trigger an ultrafast process that implies electronic charge redistribution coupled to the nuclear motion. The ultimate goal of the emerging field of attochemistry is to be able to control the evolution of such a wavepacket that implies the control of chemical reactivity, which is potentially achievable by tuning the electronic coherences among the states which are coupled via a second probe pulse or via the nuclear dynamics.