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The title compound, C 13 H 12 ClN 7 , crystallizes with two independent mol­ecules in the asymmetric unit, each with similar geometries. The dihedral angles between the triazole and pyrimidine rings are 0.45 (9) and 1.00 (10)° in the two mol­ecules. A number of N—H⋯N hydrogen bonds co-operate with C–H⋯N contacts, forming a supra­molecular array in the  ab  plane. C—H⋯π inter­actions are also present. One of the vinyl groups was found to be disordered so that the C(H)=CH 2  atoms were resolved over two positions with the major component having a site occupancy factor of 0.539 (4).

6-Allyl-3-(6-chloro-3-pyridylmethyl)-6,7-dihydro-3H-1,2,3-triazolo[4,5-d]pyrimidin-7-imine