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.
Characteristic 1H NMR signals of 12 individual isolated atropisomers recorded in CDCl3; a) illustration of aromatic proton signals: red (o‐ArH), blue (p‐ArH), green (m‐ArH); b) Overlay spectra of 12 atropisomers aromatic regions; c) 1H‐13C HSQC of α2β2‐ 12; d) expansion of the 12 o‐ArH region.
