1-(4-Methyl­phen­yl)-1H-1,2,3,4-tetra­zole

In the title compound, C₈H₈N₄, the dihedral angle between the tetra­zole and benzene rings is 21.6 (1)°. An inter­molecular C—H...π inter­action is observed.

1-(3,5-Dichloro­phen­yl)-1H-1,2,3,4-tetra­zole

In the title compound, C₇H₄Cl₂N₄, the dihedral angle between the tetra­zole and benzene rings is 17.2 (2)°. In the crystal, C—H...N inter­actions link the mol­ecules into a flattened helical chain along the b axis.

1-(4-Chloro­phen­yl)-1H-1,2,3,4-tetra­zole

There are two independent mol­ecules in the asymmetric unit of the title compound, C₇H₅ClN₄, in which the tetra­zole and benzene rings are twisted by dihedral angles of 12.9 (1) and 39.8 (1)°. In the crystal, the independent mol­ecules are connected into a tetra­mer by C—H...N hydrogen bonds, generating an R₄⁴(12) graph-set motif.

(E)-Ethyl 2-cyano-3-(furan-2-yl)acrylate

There are two independent mol­ecules in the asymmetric unit of the title compound, C₁₀H₉NO₃, in both of which, all non-H atoms except for the methyl C atom lie nearly in the same plane [maximum deviations = 0.094 (3) and 0.043 (2) Å]. In the crystal, each independent mol­ecules is linked by pairs of C—H...O inter­actions, generating inversion dimers with R₂²(10) ring motifs.