Cover illustration

Cover image expansion

Cover image: Projections of the free energy landscape of prototypical elimination and substitution (SN2) reaction channels for F- and CH3CH2F. Red arrows mark the lowest free energy paths from the reactant state (lower right) to the E2 product state (lower left) and to the SN2 product state (lower left). See the article by Ensing and Klein on pages 6755–6759. Image courtesy of Bernd Ensing.