Maeda and Ohno 51 studied the Microsolvation of H 2 S using ab initio potential energy surfaces by the scaled hypersphere search method. They reported the various of (H 2 O) m (H 2 S) where m = 5 -7 clusters with RE 10.9 kcal mol -1 at the MP2/6-311++G(3df,2p) level. structures Bandyopadhyay et al. reported the various conformer of (H 2 O) m (H 2 S) n mixed clusters up to tetramers. They also reported the BE for (H 2 O) m (H 2 S) n (m + n = 2 to 4) clusters in the range between 2.66 to 20.76 kcal mol -1 .