𝔖 Bobbio Scriptorium
✦   LIBER   ✦

4-Phenyl­pyridinium betaine of squaric acid

✍ Scribed by Kolev, Tonsko ;Wortmann, Rüdiger ;Spiteller, Michael ;Sheldrick, William Stephen ;Mayer-Figge, Heike

Publisher
International Union of Crystallography
Year
2005
Tongue
English
Weight
137 KB
Volume
61
Category
Article
ISSN
1600-5368

No coin nor oath required. For personal study only.

✦ Synopsis

Single-crystal X-ray study T = 293 K Mean (C-C) = 0.003 A R factor = 0.043 wR factor = 0.112 Data-to-parameter ratio = 12.2 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.

📜 SIMILAR VOLUMES

4-Methoxy­pyridinium betaine of squaric
4-Methoxy­pyridinium betaine of squaric acid
✍ Kolev, T. ;Wortmann, R. ;Spiteller, M. ;Sheldrick, W. S. ;Mayer-Figge, H. 📂 Article 📅 2004 🏛 International Union of Crystallography 🌐 English ⚖ 174 KB

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.

The pyridinium-betaine of squaric acid
The pyridinium-betaine of squaric acid
✍ Kolev, Tsonko ;Yancheva, Denitsa ;Shivachev, Boris ;Petrova, Rosica 📂 Article 📅 2007 🏛 International Union of Crystallography 🌐 English ⚖ 808 KB
Synthesis and Spectral and Structural El
Synthesis and Spectral and Structural Elucidation of Some Pyridinium Betaines of Squaric Acid: Potential Materials for Nonlinear Optical Applications
✍ T. M. Kolev; D. Y. Yancheva; S. I. Stoyanov 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 150 KB

## 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

4-Phenyl­pyridinium hydrogensquarate
4-Phenyl­pyridinium hydrogensquarate
✍ Kolev, T. ;Wortmann, R. ;Spiteller, M. ;Sheldrick, W. S. ;Heller, M. 📂 Article 📅 2004 🏛 International Union of Crystallography 🌐 English ⚖ 228 KB