X-ray diffraction analysis and spectral studies of new derivatives of pyrazol-5-one

The molecular and crystal structures of 4-acetamido-2,3-dimethyl-1-phenylpyrazol-5-one (1) and 4-maleylamido-2,3-dimethyl-1-phenylpyrazol-5-one (2) were studied. The molecular conformations are stabilized via systems of intermolecular hydrogen bonds between the amide groups and the carbonyl oxygen atoms of the pyrazolone rings. The conformation of compound 2 is additionally stabilized via an intramolecular interaction between the carboxyl group and the amide oxygen atom. According to the IR spectral data, protonation of the compounds understudy in an acetonitrile solution occurs at the carbonyl oxygen atom of the pyrazolone ring, which is also confirmed by the UV spectral data.

Authors
Kuznetsov M.L.1 , Bel'skii V.K. 2 , Dement'ev A.I.1 , Zaitsev B.E. 3 , Lokshin B.V.4 , Zhornik V.V.1
Editors
-
Publisher
-
Number of issue
7
Language
English
Pages
1274-1280
Status
Published
Department
-
Number
-
Volume
48
Year
1999
Organizations
  • 1 Moscow Pedagogical State University, 3 Nesvizhskii per., 119021 Moscow, Russian Federation
  • 2 Stt. Res. Ctr. of the Russ. Fed., L. Ya. Karpov Sci.-Res. P., 10 ul. Vorontsovo Pole, 103064 Moscow, Russian Federation
  • 3 Russ. Peoples' Friendship University, 3 ul. Ordzhonikidze, 117419 Moscow, Russian Federation
  • 4 A. N. Nesmeyanov Inst. of O., Russian Academy of Sciences, 28 ul. Vavilova, 117813 Moscow, Russian Federation
Keywords
Derivatives; IR spectroscopy; Pyrazol-5-one; X-ray diffraction analysis
Date of creation
19.10.2018
Date of change
19.10.2018
Short link
https://repository.rudn.ru/en/records/article/record/610/