A theoretical study is presented of the dynamics of resonant electron scattering from N-2-Ar and N-2-Ar-2 van der Waals clusters. Using the results of quantum electron-molecule scattering calculations we analyze the effects of adjacent Ar atoms on the width and position of the low-energy (2) Pi(g) electron-scattering resonance of N-2. The results indicate that the presence of the Ar atoms leads to positive energy shifts and an increase in the width of the resonance. The magnitude of these changes depended on the orientation of N-2 relative to the Ar atoms and on the number of Ar atoms. Additionally, in some arrangements, the degenerate (2) Pi(g) resonance was split into two distinct resonances. Implications for electron scattering from N-2 adsorbed on solid Ar surfaces are also discussed. (C) 1997 American Institute of Physics. [S0021-9606(97)01843-6].