Scheme 2.
Examples of ditopic halogen bond donors used toward the formation of molecular rectangles with bpen, and exhibiting [2+2] cycloaddition under UV irradiation.
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.