On the Grid Implementation of a Quantum Reactive Scattering Program Alessandro Costantini 1 ∗ , Dimitrios Skouteris 1 , Osvaldo Gervasi 2 and Antonio Lagan`a 1 1 Department of Chemistry, University of Perugia, Perugia, Italy 2 Department of Mathematics and Informatics, University of Perugia, Perugia, Italy Lecture given at the Joint EU-IndiaGrid/CompChem Grid Tutorial on Chemical and Material Science Applications Trieste, 15-18 September 2008 LNS0924009 ∗ alex@impact.dyn.unipg.it