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Experimental and computational studies of the structure and vibrational spectra of 4-dimethylamino pyridinium-betaine of squaric acid

✍ Scribed by Tsonko M. Kolev; Bistra A. Stamboliyska; Denitsa Y. Yancheva; Venelin Enchev

Publisher
Elsevier Science
Year
2004
Tongue
English
Weight
149 KB
Volume
691
Category
Article
ISSN
0022-2860

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## Abstract A series of substituted pyridinium betaines of squaric acid have been prepared by quaternization reaction of 3‐ and 4‐substituted pyridines with squaric acid. The products were characterized by means of elemental analysis, melting points, and their UV‐vis and IR spectra. The UV‐vis spec