Acta Cryst. (2008). E64, o863  [ doi:10.1107/S1600536808010180 ]

1,4-Dimethyl-3-phenyl-3H-pyrazolo[3,4-c]isoquinolin-5(4H)-one

F. Meneghetti, G. Bombieri, B. Maggio and G. Daidone

Abstract: The title compound, C₁₈H₁₅N₃O, is the product of the thermal decomposition of the diazonium salt derived from 2-amino-N-methyl-N-(3-methyl-1-phenyl-1H-pyrazol-5-yl)benzamide. It is characterized by a trans orientation of the methyl groups with respect to the tricyclic ring system. The molecule has a nearly planar phenylpyrazolo[3,4-c]isoquinolin-5-one system, the largest deviation from the mean plane being 0.066 (2) Å for the O atom. The dihedral angle between the phenyl substituent and the heterotricycle is 67 (1)°. The packing is stabilized by C-HN hydrogen-bond interactions, with the formation of molecular chains along the c axis.

Online 16 April 2008

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