Document Type : Research Article
Department of Chemistry, Tarbiat Modarres University, P.O. Box 14155-4838, Tehran, I.R. IRAN
Department of Chemistry, Science and Research Branch, Islamic Azad University, P.O. Box 19395-1775, Tehran, I.R. IRAN
MNDO semi-empirical SCF MO calculations are used to study the pyramidal nitrogen atom inversion and configurational equilibria in the title compounds.