2-(1,3-Benzothiazol-2-yl)-6-ethoxyphenol

In the title compound, C15H13NO2S, the benzothiazole unit is essentially planar [maximum deviation = −0.0099 (5) Å for the S atom] and is oriented at a dihedral angle of 4.8 (5)° with respect to the benzene ring. An intramolecular O—H⋯N hydrogen bond generates an S(6) ring motif. The crystal packing is stabilized by C—H⋯π interactions.

In the title compound, C 15 H 13 NO 2 S, the benzothiazole unit is essentially planar [maximum deviation = À0.0099 (5) Å for the S atom] and is oriented at a dihedral angle of 4.8 (5) with respect to the benzene ring. An intramolecular O-HÁ Á ÁN hydrogen bond generates an S(6) ring motif. The crystal packing is stabilized by C-HÁ Á Á interactions.

Experimental
A mixture of 3-ethoxy-2-hydroxybenzaldehyde (0.1g, 0.6 mmol) and 2-aminobenzenethiol (0.075g, 0.6 mmol) was placed in a round bottom flask and melted at 180 0 C for 1h. After completion of the reaction as indicated by TLC, the crude product was washed with 5 mL of ethylacetate and hexane mixture (1:49 ratio) which successfully provided the pure product 2-(benzo[d]thiazol-2-yl)-6-ethoxyphenol as colorless solid (91%). The pure compound was crystallized from ethylacetatehexane 2:10. Single crystals suitable for X-ray diffraction were obtained by slow evaporation of a ethylacetate solution at room temperature.

Refinement
All the H atoms were positioned geometrically, with O-H = 0.82 Å and and C-H = 0.93 -0.98 Å and constrained to ride on their parent atom, with U iso (H)=1.5U eq for methyl and hydroxyl H atoms and 1.2U eq (C) for other H atoms.
supplementary materials sup-2 Figures   Fig. 1. The molecular structure of the title compound with the atom numbering scheme. Displacement ellipsoids are drawn at the 50% probability level. H atoms are presented as a small cycles of arbitrary radius.

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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å 2 )
x y z U iso */U eq S1 0.05727 (