Figure 4.
Crystal structures of (a) 6e, (b) 6f, and (c) 6g showing the C–H···O, C–H···N, and C–H···F hydrogen-bond interactions. The (i), (ii), and (iii) codes serve as a reference with the description in the text.
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.