Abstract
The molecular and crystal structures of 1-phenyl-3-methyl-4-(2′,4′-dimethyl-phenylazo) pyrazolone-5 were determined. In the crystal the molecule exists as the hydrazone tautomer. The pyrazole ring is planar, and the substituents are practically coplanar with it. The molecule contains an intramolecular NH...O hydrogen bond that closes a practically planar six-membered ring (N...O, 2.77 (I), H...O 2.14 Å, angle at H(N(4)) hydrogen 131 °). The x-ray diffraction data agree with the spectral data and with the CNO calculation.
Similar content being viewed by others
Literature cited
W. Pelz, W. Pushel, H. Schellenberger, and K. Loffer, Angew, Chem., 72, 967 (1960).
J. Ilgnero, R. Jacgner [sic], and G. Farrago, Bull. Soc. Chim. Fr., 2990 (1966).
J. R. Jones, A. J. Ryan, S. Sternhell, and S. E. Wright, Tetrahedron, 19, 1497 (1960).
F. A. Snavely and C. H. Joder, J. Org. Chem., 33, 513 (1968).
B. E. Zaitsev, V. A. Zaitseva, A. K. Molodkin, and E. S. Obraztsova, Zh. Neorg. Khim., 24, 127 (1979).
B. E. Zaitsev and Yu. N. Sheinker, Izv. Akad. Nauk SSSR, Otd. Khim. Nauk, No. 3, 407 (1963).
E. Bayer and G. Hafelinger, Chem. Ber., 99, 1689 (1966).
H. L. Ammon, P. M. Marroechi, M. C. Regan, and E. Colicelli, Acta Crystallogr. B, 35, 1722 (1979).
L. E. Sutton (editor), Tables of Interatomic Distances and Configuration in Molecules and Ions, Special Publ. No. 18, Chemical Society (1965).
Douglas L. Smith and Eileen K. Barrett, Acta Crystallogr. B, 27, 2043 (1971).
M. Dewar, Molecular Orbital Theory of Organic Chemistry, McGraw-Hill (1969).
D. A. Ramsay, J. Am. Chem. Soc., 72, 74 (1952).
Author information
Authors and Affiliations
Additional information
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 816–821, June, 1985.
Rights and permissions
About this article
Cite this article
Kuz'mina, L.G., Grigor'eva, L.P., Struchkov, Y.T. et al. X-ray diffraction and spectral studies of 1-phenyl-3-methyl-4-(2′,4′-Dimethylphenylazo)-pyrazolone-5. Chem Heterocycl Compd 21, 680–684 (1985). https://doi.org/10.1007/BF00515072
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF00515072