Abstract
Some dynamical features of present day globular clusters seem to be the result of the effects produced at the epoch of formation, both by the rate of primordial binary stars and the formation and destruction of new ones. Even a mass segregation and a cluster evaporation driven by the population of binary stars are possible. The spread in the core radius among intermediate age and old stars clusters, observed e.g. in the LMC, could be generated by these two effects. In this contribution some preliminary results are shown.
