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) Average delocalization index (DI) of the bonds in the ring for the 21 cyclic compounds. (B) DI, length, and strength for individual bonds in the rings of the six-membered compounds and (C) five-membered compounds. X-Y in x-axis denotes bond Y of compound X; the Y bond indices for each compound are illustrated in Table 1.
