2,2'-(Propane-1,3-di-yl)bis-(2H-indazole)

The title mol-ecule, C(17)H(16)N(4), is a bis-indazole crystallized in the rare 2H-tautomeric form. Indazole heterocycles are connected by a propane C(3) chain, and the mol-ecule is placed on a general position, in contrast to the analogous compound with a central C(2) ethane bridge, which was previously found to be placed on an inversion center in the same space group. In the title mol-ecule, indazole rings make a dihedral angle of 60.11 (7)°, and the bridging alkyl chain displays a trans conformation, resulting in a W-shaped mol-ecule. In the crystal, mol-ecules inter-act weakly through π-π contacts between inversion-related pyrazole rings, with a centroid-centroid separation of 3.746 (2) Å.