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Intramolecular hydrogen bonds in 1-vinyl-5-pyrazole carboxylate esters

✍ Scribed by V. V. Tserunyan; G. V. Asratyan; E. G. Darbinyan


Publisher
Springer US
Year
1988
Tongue
English
Weight
48 KB
Volume
24
Category
Article
ISSN
0009-3122

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Spectroscopic proof for intermolecular o
✍ Toyotoshi Ueda; Yoshifumi Akama πŸ“‚ Article πŸ“… 1994 πŸ› Elsevier Science 🌐 English βš– 369 KB

The broad infrared bands of the polymorphic crystals of I-phenyl-3-methyl-4-benzoyl+pyrazolone (PMBP) were assigned unequivocally by examining the IR spectra of solutions and Raman spectra. The strong band at 2550 cm-' of a colourless crystal was attributed to an intermolecular hydrogen bond NH...O=