5-{4'-[(5-Benzyl-2H-tetra-zol-2-yl)meth-yl]biphenyl-2-yl}-1H-tetra-zole monohydrate.

In the title compound, C22H18N8·H2O, the dihedral angle between the tetra-zole rings is 69.58 (1)° while the terminal phenyl ring makes dihedral angles of 26.98 (8) and 39.75 (8)° with the other benzene rings. The rings of the biphenyl unit subtend a dihedral angle of 55.23 (8)°. In the crystal, the solvent water mol-ecule is linked to the main mol-ecule via an N-H⋯O hydrogen bond. In addition, C-H⋯N and O-H⋯N hydrogen bonds link the components into chains along [010]. The crystal structure also features C-H⋯π and π-π inter-actions, with centroid-centroid distances of 3.6556 (9) and 3.826 (1) Å.