2-(2H-Benzotriazol-2-yl)-6-[(dicyclohexylamino)methyl]-4-(2,4,4-trimethylpentan-2-yl)phenol

In the title molecule, C33H48N4O, the dihedral angle between the mean planes of the benzotriazole ring system [maximun deviation = 0.038 (2) Å] and the phenol ring is 16.6 (2)°. There is an intramolecular O—H⋯N hydrogen bond between the phenol and benzotriazole groups.


Related literature
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: LH5530).
between the phenol and benzotriazole groups ( Table 1). The distance of N1···H is substantially shorter than the van der Waals distance of 2.75 Å for the N and H distance. It is interesting to note that the six-membered ring (O/C1/C2/N2/N1/H0A) formed from the O-H···N hydrogen-bond is almost planar with a mean deviation of 0.041 (2) Å.

Refinement
The H atoms were placed in idealized positions and constrained to ride on their parent atoms, with C-H = 0.93 Å with U iso (H) = 1.2 U eq (C) for benzene hydrogens; 0.96 Å with U iso (H) = 1.5 U eq (C) for CH 3 group; 0.97 Å with U iso (H) = 1.2 U eq (C) for CH 2 group; 0.98 Å with U iso (H) = 1.2 U eq (C) for CH group; O-H = 0.85 Å with U iso (H) = 1.5 U eq (O).

Figure 1
The molecular structure of (I) with displacement ellipsoids drawn at the 30% probability level.

Special details
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s 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 > σ(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.  (7) 0.0100 (7) −0.0044 (8)  C28 0.0408 (7) 0.0453 (7) 0.0440 (7) 0.0028 (6)