REVUE ROUMAINE DE CHIMIE, cilt.45, sa.1, ss.27-34, 2000 (SCI-Expanded)
The nucleophilic addition reactions of water and methanol to protonated acetone and its monohalogenated derivatives were investigated ill gas phase by using MOPAC6.(1) The transition states were determined by SADDLE method in MOPAC6. The systems were characterized as transition states by the presence of negative force constant hi the Hessian matrix of a force calculation. Semiempirical calculations were also performed by MNDO method from MOPAC6.