作者:Stefan Berger
DOI:10.1016/s0040-4020(01)92103-9
日期:1981.1
The pH dependence of the 13C NMR spectra of phenolphthalein, a laxative agent and titration indicator, was measured and interpreted. The spectrum of the neutral compound is compared with the spectra of the dianion, the trianion and the carbocation. Spectroscopic evidence for the carbinol is given.