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.
(a) A portion of the crystal packing of (I) viewed down the b axis (parallel to the hydrogen-bonded layer). (b) A portion of the crystal packing of (II), showing the hydrogen-bonded chain of the molecules. Thin dotted lines denote intermolecular hydrogen bonds.
