THE COMPLEX OF N-2 WITH H2O, D2O, AND HDO - A COMBINED AB-INITIO AND DIFFUSION MONTE-CARLO STUDY

We present an analysis of the complex of water with N-2 which includes (a) ab initio calculations of the potential energy surface; (b) ab in itio analysis of the different contributions to the interaction energy (exchange, electrostatic, dispersion, induction); (c) a diffusion Mon te Carlo study of the vibrational ground state and a calculation of vi brationally averaged spectroscopic constants for the different isotopi c species; (d) construction of an N-2..H2O potential function by fitti ng to ab initio points followed by adjustment against the experimental rotational and quadrupole coupling constants of Leung et al. [J. Chem . Phys. 90, 700 (1989)].