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.
Molecular structure of 6. Hydrogen atoms are omitted for clarity. Thermal ellipsoids for 6 represent a 50 % probability level, carbon atoms are shown as wire frame for better visibility. For selected bond lengths and angles see the Supporting Information.
