Structures of pyrazole derivatives. III. 5-Amino-4-cyano-1-phenylpyrazole

The phenyl and pyrazole rings in the title compound, 5-amino-1-phenyl-4-pyrazolecarbonitrile, C 10 H 8 N 4 , are planar and make a dihedral angle of 130.7 (1)°. The molecular packing involves an intermolecular hydrogen bond: N(3)...N(4 i )=3.074 (5), N(3)-H'(N3)=1.023 (5), N(4 i )...H'(N3)=2.060 (5) A, N(3)-H'(N3)...N'4 i )=171.2 (2)° [symmetry code: (i) 1-x, -y, 1-z]