Acta Cryst. (2011). E67, o2144 [ doi:10.1107/S1600536811029011 ]
Abstract: The title molecule, C17H16N4, is a bis-indazole crystallized in the rare 2H-tautomeric form. Indazole heterocycles are connected by a propane C3 chain, and the molecule is placed on a general position, in contrast to the analogous compound with a central C2 ethane bridge, which was previously found to be placed on an inversion center in the same space group. In the title molecule, indazole rings make a dihedral angle of 60.11 (7)°, and the bridging alkyl chain displays a trans conformation, resulting in a W-shaped molecule. In the crystal, molecules interact weakly through - contacts between inversion-related pyrazole rings, with a centroid-centroid separation of 3.746 (2) Å.
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