ISSN:
0377-0486
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Raman and infrared spectra of phenolphthalein and its white and pink potassium salts together with the resonance Raman spectrum of the parent compound in alkaline solution were studied. From careful comparison of the spectra, the observed frequencies were assigned to appropriate vibrational modes and from these assignments frequencies originating from vibrations of hybridized bonds in the resonating molecular forms of phenolphthalein, believed to be present in alkaline solution were identified. It was shown that such resonating forms are present in the pink but not the white potassium salt. The spectral data also indicate that the vibrations of the carboxylate ion group do not take part in the resonance Raman phenomenon.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jrs.1250201004
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