STRUCTURES OF SMALL WATER CLUSTERS USING GRADIENT-CORRECTED DENSITY-FUNCTIONAL THEORY

The structures of small water clusters (up to 8 molecules) have been s tudied using gradient-corrected density functional theory and ab initi o molecular dynamics. For smaller clusters (3, 4 and 6 molecules) ring structures were found to be the most stable. while for octamers three -dimensional structures are lower in energy. All our results are in go od agreement with existing HF-based calculations. We have also calcula ted the hydrogen stretching frequencies for the dimer and trimer.