Figure 18.
Structure of the B4O72− ion. Open circles represent O2−, filled circles represent B3+. The central O2− is proposed to be the labile anion.
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.