Ontology highlight
ABSTRACT:
SUBMITTER: Shi H
PROVIDER: S-EPMC5458516 | biostudies-literature | 2017 May
REPOSITORIES: biostudies-literature
Shi Hui H Eckstein Sebastian S Vjunov Aleksei A Camaioni Donald M DM Lercher Johannes A JA
Nature communications 20170525
Acid catalysis by hydronium ions is ubiquitous in aqueous-phase organic reactions. Here we show that hydronium ion catalysis, exemplified by intramolecular dehydration of cyclohexanol, is markedly influenced by steric constraints, yielding turnover rates that increase by up to two orders of magnitude in tight confines relative to an aqueous solution of a Brønsted acid. The higher activities in zeolites BEA and FAU than in water are caused by more positive activation entropies that more than offs ...[more]