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4-Methoxy­pyridinium betaine of squaric acid

✍ Scribed by Kolev, T. ;Wortmann, R. ;Spiteller, M. ;Sheldrick, W. S. ;Mayer-Figge, H.

Publisher
International Union of Crystallography
Year
2004
Tongue
English
Weight
174 KB
Volume
60
Category
Article
ISSN
1600-5368

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✦ Synopsis

Single-crystal X-ray study T = 293 K Mean '(C±C) = 0.003 A Ê R factor = 0.044 wR factor = 0.107 Data-to-parameter ratio = 10.9

For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.

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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