SEARCH Articles Figures Tables 20-electron transition state 20-electron transition state A Transition-State Perspective of Proton-Coupled Electron Transfers Electron transfer reactions quantum transition-state theory Electronic Structure of Transition States Electronic Transitions and Lifetime of Excited States in Porphyrin-Based Compounds Electronic energies, transition state Electronic entropy spin-state transitions Electronic structure calculations transition state theory Electronic transition state theory Hemes electronic state transitions Hydrazino group, electronic effects hydrogen-bonded transition state Palladium compounds, electronic structure transition state Spectroscopic Techniques for Measuring Collision-Induced Transitions in the Electronic Ground State of Molecules Sulfur atoms, electronic states transition state Transition between molecular electronic states Transition elements valence electronic state Transition state theory electronic structure Transition states electronic structure Transition states, 3 center-2 electron Transitions, between electronic states