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.
Hammett correlations between the 13C chemical shift values (δ(C-X)) of substituted 2,2-dimethylchroman-4-one derivatives and Hammett substituent constants (σp+ or σm, depending on the considered C-atoms): (a) carbon atoms in para- position (Series 1–3), and (b) carbon atoms in meta- position (Series 1) with respect to the substituent R.
