We review some recent results on the dynamics of molecules in deep supercoo
led states, extracted from the analysis of a series of long molecular dynam
ics simulations. The intermolecolar potential has been chosen for its abili
ty of mimicking the interactions among water molecules in liquid state. We
show that mode-coupling theory offers a reference frame for the understandi
ng of the dynamics in molecular liquids above a dynamical critical temperat
ure.