Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(Left) Substrate orientation relative to FeIV=O along the σ and π channels. (Right) Reactivity along π channel requires an additional promotion energy (PE), which is compensated by an earlier TS along the C-H reaction coordinate due to a more polarized oxo (80% in π channel vs 30% in σ channel).
