ELECTRON CORRELATION AND SOLVATION EFFECTS .2. THE DESCRIPTION OF THE VIBRATIONAL PROPERTIES OF A WATER MOLECULE IN A DIELECTRIC GIVEN BY THE APPLICATION OF THE POLARIZABLE CONTINUUM MODEL WITH INCLUSION OF CORRELATION-EFFECTS

The ab initio quantum mechanical version of the polarizable continuum model has recently been improved by introducing electron correlation effects (paper I). In the present paper we continue the analysis of the performances of this method by examining the potential energy surface of H2O in vacuo and in a medium (epsilon = 78.3), at the SCF, MBP2 and MBP3 levels of the formalism. A short discussion about the relevance of this approach to gain some information about structural features of bulk water is also included.