Acta Cryst. (2005). E61, o3679-o3681  [ doi:10.1107/S1600536805032484 ]

cis-Ethyl 5-amino-1-[4-(4-chlorophenyl)-5,5-dimethyl-2-oxo-1,3,2-dioxaphosphinan-1-yl]-3-(6-chloro-3-pyridylmethylamino)-1H-pyrazole-4-carboxylate

Z.-G. Luo, D.-Q. Shi and X.-G. Meng

Abstract: In the title compound, C₂₃H₂₆Cl₂N₅O₅P, the P atom adopts a distorted tetrahedral configuration. The carboxyl fragment of the ethylcarboxylate group is almost coplanar with the pyrazole ring. The dihedral angle between the pyrazole and pyridine rings is 82.7 (1)°. Intramolecular C-HO, C-HN and N-HO hydrogen bonds contribute strongly to the stability of the molecular configuration. C-HO intermolecular hydrogen bonds link inversion-related molecules into a centrosymmetric R₂²(10) dimer. In addition, C-H hydrogen bonds are observed in the crystal structure.

Online 15 October 2005

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