Acta Crystallographica Section C

Crystal Structure Communications

Volume 62, Part 8 (August 2006)

organic compounds

sk3029 scheme

Acta Cryst. (2006). C62, o467-o469 [ doi:10.1107/S0108270106021512 ]

4-(4-Chlorobenzylideneamino)-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one and 4-(2-chlorobenzylideneamino)-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one

Y.-X. Sun, R. Zhang, Q.-M. Jin, X.-J. Zhi and X.-M. Lü

Abstract: The two title compounds, both with formula C₁₈H₁₆ClN₃O, are structurally similar Schiff bases derived from the condensation of 4-chlorobenzaldehyde or 2-chlorobenzaldehyde with 4-aminoantipyrine in methanol solution. As expected, both compounds adopt trans configurations about the central C=N bonds. In the crystal structure of the 4-chloro analogue, molecules are linked through weak C-HO hydrogen bonds, forming chains running along the a axis. In the crystal structure of the 2-chloro analogue, molecules are linked through weak C-HO and C-HCl hydrogen bonds, forming layers parallel to the ab plane.

Formula: C₁₈H₁₆ClN₃O


	Structure factor file (CIF format) (167.0 kbytes) [ doi:10.1107/S0108270106021512/sk3029Isup2.hkl ] Contains datablock I

	Structure factor file (CIF format) (165.7 kbytes) [ doi:10.1107/S0108270106021512/sk3029IIsup3.hkl ] Contains datablock a

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