1-[2-(2,4-Dichlorobenzyloxy)-2-(furan-2-yl)ethyl]-1H-benzotriazole

In the title compound, C19H15Cl2N3O2, the benzotriazole ring system is approximately planar [maximum deviation = 0.018 (2) Å] and its mean plane is oriented at dihedral angles of 30.70 (5) and 87.38 (4)°, respectively, to the furan and benzene rings while the dihedral angle between furan and benzene rings is 74.46 (6)°. In the crystal, weak C—H⋯N hydrogen bonds link the molecules into chains along the b axis. π–π stacking interactions between the parallel dichlorobenzene rings of adjacent molecules [centroid–centroid distance = 3.6847 (9) Å] and weak C—H⋯π interactions are also observed.

In the title compound, C 19 H 15 Cl 2 N 3 O 2 , the benzotriazole ring system is approximately planar [maximum deviation = 0.018 (2) Å ] and its mean plane is oriented at dihedral angles of 30.70 (5) and 87.38 (4) , respectively, to the furan and benzene rings while the dihedral angle between furan and benzene rings is 74.46 (6) . In the crystal, weak C-HÁ Á ÁN hydrogen bonds link the molecules into chains along the b axis.stacking interactions between the parallel dichlorobenzene rings of adjacent molecules [centroid-centroid distance = 3.6847 (9) Å ] and weak C-HÁ Á Á interactions are also observed.   Table 1 Hydrogen-bond geometry (Å , ).
supplementary materials sup-2 Refinement H atoms were positioned geometrically with C-H = 0.98, 0.93 and 0.97 Å for methine, aromatic and methylene H, respectively, and constrained to ride on their parent atoms, with U iso (H) = 1.2 U eq (C).
Figures Fig. 1. The molecular structure of the title compound with the atom-numbering scheme. Displacement ellipsoids are drawn at the 50% probability level.

Special details
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.
Refinement. Refinement of F 2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F 2 , conventional R-factors R are based on F, with F set to zero for negative F 2 . The threshold expression of F 2 > 2sigma(F 2 ) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F 2 are statistically about twice as large as those based on F, and R-factors based on ALL data will be even larger.