American Chemical Society
The Journal of Organic Chemistry
New carbocationic salts (via O-protonation of substituted benzoic acids) are prepared for the first time by controlled hydration of the corresponding benzoylium salts and isolated in pure crystalline form. Precise X-ray structural analyses reveal the rather unexpected (electronic) structure of the carboxylic-acidium functionality.
Lindeman, Sergey V.; Neretin, I. S.; Davlieva, M. G.; and Kochi, Jay K., "Isolation and X-ray Structures of Labile Benzoic- and Acetic-Acidium Carbocations" (2005). Chemistry Faculty Research and Publications. 654.