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3-Iodo-1H-pyrazolo-[3,4-b]pyridine. 2014

Ping-Hsin Huang, and Yuh-Sheng Wen, and Jiun-Yi Shen
Cardinal Tien College of Healthcare & Management, Taipei, 231, Taiwan.

The title compound, C6H4IN3, is essentially planar, with a dihedral angle of 0.82 (3)° between the planes of the pyridine and pyrazole rings. In the crystal, pairs of mol-ecules are connected into inversion dimers through N-H⋯N hydrogen bonds. C-I⋯N halogen bonds link the dimers into zigzag chains parallel to the b-axis direction. The packing also features π-π stacking inter-actions along (110) with inter-planar distances of 3.292 (1) and 3.343 (1) Å, and centroid-centroid distances of 3.308 (1) and 3.430 (1) Å.

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