Theoretical Analysis of the Role of the Solvent on the Reaction on the Reaction Mechanismus: One-Step versus Two-Step Ketene-Imine Cycloaddition. - Xavier Assfeld; Manuel F. Ruiz-López; J. Gonzalez; Ramón López; José A. Sordo; Tomás L. Sordo Gonzalo (J. Comput. Chem., 1994)