jo1005526_si_002.cif (14.16 kB)
Stability and Ring-Shift Tautomerization of Cyclic Anhydrides of Benzenehexasulfonic Acid
dataset
posted on 2010-07-16, 00:00 authored by Evgeny M. Garanin, Yuriy V. Tolmachev, Robert R. Hoover, Sonya Adas, Scott D. Bunge, Mahinda Gangoda, Anatoly K. Khitrin, Stephan M. Woods, Andrey Malkovskiy, Nulifer Solak, Chrys WesdemiotisUpon heating in a dry atmosphere, benzenehexasulfonic acid forms three cyclic anhydrides. Mono- and dianhydride do not hydrolyze readily due their flatter structures compared to the hydrolysis products. The trianhydride appears more to be reactive toward hydrolysis. In solutions, the mono- and dianhydride undergo ring-shift tautomerization, which is in the latter case shifted toward the para isomer.