The asymmetric unit of the title compound, C(21)H(18)ClN(3)O, contains two crystallographically independent mol-ecules which differ slightly in the orientations of chloro-benz-yloxy units. In one of the mol-ecules, the phenyl and chloro-phenyl rings are oriented at dihedral angles of 38.09 (6) and 42.15 (6)°, respectively, with respect to the benzotriazole ring [43.23 (6) and 29.80 (6)° in the ...

In the title compound, C(22)H(16)BrN(3)O(3), the dihedral angles between the benzotriazole mean plane and the benzene rings of 4.84 (1) and 89.50 (1)°. The dihedral angle between the two benzene rings is 84.77 (1)°. In the crystal structure, mol-ecules are linked into chains by inter-molecular C-H⋯O hydrogen bonds. The crystal packing is further stabilized by C-H⋯π inter-actions.

Two new 2-(2´-hydroxyaryl)benzotriazole derivatives were synthesized and studied by photophysical and photochemical techniques in order to assess their ability to act as UV-filters. The absorption and emission properties of both compounds were determined in solvents of different polarity. In non polar solvent, a photoinduced excited state intramolecular proton transfer was established leading t...

In the title compound, C(28)H(26)N(4)O(4), the tetra-hydro-pyridine ring adopts a boat conformation. The two phenyl rings form dihedral angles of 88.64 (8) and 59.28 (10)° with the best plane through the tetra-hydro-pyridine ring. The dihedral angle between the two phenyl rings is 82.55 (10)°. The benzotriazole ring system is essentially planar, with a maximum deviation of 0.009 (1) Å from the ...

In the title compound C(8)H(6)BrN(3)O, the benzotriazole ring is essentially planar (r.m.s. deviation = 0.0034 Å) and the bromo-acetyl unit is twisted at a dihedral angle of 15.24 (16)° with respect to it. In the crystal, pairs of C-H⋯O hydrogen bondings result in the formation of inversion dimers, forming R(2) (2)(12) rings, which are connected by further C-H⋯O inter-actions into chains extend...