SEARCH Articles Figures Tables Cathodic transition step Diameter step transition Elementary surface reaction steps transition state Frontier Orbital Interactions in the Transition States of One-Step -Cycloadditions Frontier Orbital Interactions in the Transition States of One-Step 1,3-Dipolar Cycloadditions Sustmann Classification Single-step reactions, transition-state Single-step reactions, transition-state theory The one-step transition probability matrix Transition elementary reaction steps Transition metal complexes reaction steps Transition metals step Transition state theory, rate determining steps Transition states rate-determining step Transitioning five-step model Two-step transition