4-Bromo-2-{[(pyridin-3-ylmeth­yl)imino]­meth­yl}phenol

The title compound, C₁₃H₁₁BrN₂O, is a polydentate Schiff base and reveals intra­molecular O—H⋯N hydrogen bonding between the hy­droxy O atom and the imino N atom. The dihedral angle between the aromatic ring and the pyridyl ring is 71.7 (1)°. In the crystal, the mol­ecules are stacked in columns along the c axis and several inter­molecular π–π inter­actions are present between the six-membered rings, with a shortest centroid–centroid distance of 3.707 (2) Å.

Related literature

For the crystal structure of 4-bromo-2-{[(pyridin-2-ylmethyl)imino]methyl}phenol, see: Zhang et al. (2003).

Experimental

Crystal data

• C₁₃H₁₁BrN₂O

• M_r = 291.15

• Monoclinic, P 2₁ /c

• a = 14.0947 (19) Å

• b = 6.0994 (8) Å

• c = 14.0373 (19) Å

• β = 103.704 (3)°

• V = 1172.4 (3) ų

• Z = 4

• Mo Kα radiation

• μ = 3.49 mm⁻¹

• T = 200 K

• 0.30 × 0.22 × 0.14 mm

Data collection

• Bruker SMART 1000 CCD diffractometer

• Absorption correction: multi-scan (SADABS; Bruker, 2000) T_min = 0.833, T_max = 1.000

• 8297 measured reflections

• 2906 independent reflections

• 1859 reflections with I > 2σ(I)

• R_int = 0.037

Refinement

• R[F² > 2σ(F²)] = 0.037

• wR(F²) = 0.099

• S = 1.13

• 2906 reflections

• 158 parameters

• H atoms treated by a mixture of independent and constrained refinement

• Δρ_max = 0.53 e Å⁻³

• Δρ_min = −0.84 e Å⁻³

Table 1
Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H1⋯N1	0.96 (5)	1.80 (5)	2.616 (5)	141 (5)

Data collection: SMART (Bruker, 2000); cell refinement: SAINT (Bruker, 2000); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97.

Supporting information

S1. Comment

The title compound, C₁₃H₁₁BrN₂O, is a polydentate Schiff base (Fig. 1), which can act as a monobasic bi- or tridentate ligand, that is, the NO or N₂O donor atoms can coordinate to a metal ion or metal ions. The compound crystallized in the monoclinic space group P2₁/c, whereas the previously reported analogous compound 4-bromo-2-{[(pyridin-2-ylmethyl)imino]methyl}phenol crystallized in the triclinic space group P1 (Zhang et al., 2003).

The Schiff base reveals intramolecular O—H···N hydrogen bonding between the hydroxy O atom and the imino N atom with d(O···N) = 2.616 (5) Å forming a nearly planar six-membered ring (Fig. 2, Table 1). The O1—H1 bond length is somewhat long, but the zwitterionic possibility can be excludued. The dihedral angle between the benzene ring and the pyridine ring is 71.7 (1)°. The N1—C7/8 bond lengths and the C7—N1—C8 bond angle indicate that the imino N1 atom is sp²-hybridized [d(N1═C7) = 1.271 (5) Å and d(N1—C8) = 1.468 (5) Å; <C7—N1—C8 = 117.6 (4)°]. In the crystal structure, the molecules are stacked in columns along the c axis and several intermolecular π-π interactions are present between the six-membered rings, with a shortest centroid-centroid distance of 3.707 (2) Å.

Related literature

For the crystal structure of 4-bromo-2-{[(pyridin-2-ylmethyl)imino]methyl}phenol, see: Zhang et al. (2003).

S2. Experimental

3-(Aminomethyl)pyridine (1.0751 g, 9.942 mmol) and 5-bromosalicylaldehyde (1.9988 g, 9.943 mmol) in EtOH (20 ml) were stirred for 2 h at room temperature. After add of pentane (50 ml) to the solution, the formed precipitate at -85 °C was then separated by filtration, washed with pentane, and dried at 50 °C, to give a gold-yellow powder (2.7240 g). Crystals suitable were obtained by slow evaporation from a CH₃CN solution.

S3. Refinement

H atoms were positioned geometrically and allowed to ride on their respective parent atoms [C—H = 0.95 Å (CH) or 0.99 Å (CH₂) and U_iso(H) = 1.2U_eq(C)]. The hydroxy H atom was located from Fourier difference maps and refined isotropically [O—H = 0.96 (5) Å].

Computing details

Data collection: SMART (Bruker, 2000); cell refinement: SAINT (Bruker, 2000); data reduction: SAINT (Bruker, 2000); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).

Figures

	Fig. 1. The structure of the title compound, with displacement ellipsoids drawn at the 50% probability level.
	Fig. 2. View of the unit-cell contents of the title compound. Hydrogen-bond interactions are drawn with dashed lines.

4-Bromo-2-{[(pyridin-3-ylmethyl)imino]methyl}phenol

Crystal data

C13H11BrN2O	F(000) = 584
Mr = 291.15	Dx = 1.649 Mg m^−3
Monoclinic, P21/c	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ybc	Cell parameters from 3009 reflections
a = 14.0947 (19) Å	θ = 3.0–27.0°
b = 6.0994 (8) Å	µ = 3.49 mm^−1
c = 14.0373 (19) Å	T = 200 K
β = 103.704 (3)°	Block, yellow
V = 1172.4 (3) Å^3	0.30 × 0.22 × 0.14 mm
Z = 4

Data collection

Bruker SMART 1000 CCD diffractometer	2906 independent reflections
Radiation source: fine-focus sealed tube	1859 reflections with I > 2σ(I)
Graphite monochromator	Rint = 0.037
ϕ and ω scans	θmax = 28.3°, θmin = 3.0°
Absorption correction: multi-scan (SADABS; Bruker, 2000)	h = −18→17
Tmin = 0.833, Tmax = 1.000	k = −8→8
8297 measured reflections	l = −13→18

Refinement

Refinement on F^2	Primary atom site location: structure-invariant direct methods
Least-squares matrix: full	Secondary atom site location: difference Fourier map
R[F^2 > 2σ(F^2)] = 0.037	Hydrogen site location: inferred from neighbouring sites
wR(F^2) = 0.099	H atoms treated by a mixture of independent and constrained refinement
S = 1.13	w = 1/[σ^2(Fo^2) + (0.0134P)^2 + 2.5694P] where P = (Fo^2 + 2Fc^2)/3
2906 reflections	(Δ/σ)max < 0.001
158 parameters	Δρmax = 0.53 e Å^−3
0 restraints	Δρmin = −0.84 e Å^−3

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 F² against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F², conventional R-factors R are based on F, with F set to zero for negative F². The threshold expression of F² > σ(F²) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F² 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 (Ų)

	x	y	z	Uiso*/Ueq
Br1	0.76468 (3)	0.70338 (8)	0.44621 (4)	0.04693 (16)
O1	0.3873 (2)	0.1972 (5)	0.3696 (2)	0.0395 (7)
H1	0.332 (4)	0.283 (9)	0.338 (4)	0.081 (18)*
N1	0.3004 (2)	0.5487 (6)	0.2840 (2)	0.0353 (8)
N2	0.0887 (2)	0.9342 (6)	0.4172 (3)	0.0416 (9)
C1	0.4726 (3)	0.5284 (6)	0.3484 (3)	0.0267 (8)
C2	0.4714 (3)	0.3123 (6)	0.3834 (3)	0.0281 (8)
C3	0.5585 (3)	0.2149 (7)	0.4341 (3)	0.0338 (9)
H3	0.5578	0.0687	0.4574	0.041*
C4	0.6450 (3)	0.3279 (7)	0.4507 (3)	0.0338 (9)
H4	0.7038	0.2606	0.4855	0.041*
C5	0.6462 (3)	0.5405 (7)	0.4164 (3)	0.0307 (9)
C6	0.5623 (3)	0.6397 (7)	0.3654 (3)	0.0307 (9)
H6	0.5649	0.7845	0.3413	0.037*
C7	0.3835 (3)	0.6408 (7)	0.2984 (3)	0.0307 (9)
H7	0.3876	0.7867	0.2761	0.037*
C8	0.2146 (3)	0.6772 (8)	0.2349 (3)	0.0412 (10)
H8A	0.1805	0.6019	0.1740	0.049*
H8B	0.2358	0.8231	0.2169	0.049*
C9	0.1454 (2)	0.7050 (7)	0.3019 (3)	0.0317 (8)
C10	0.1465 (3)	0.8949 (7)	0.3555 (3)	0.0391 (10)
H10	0.1915	1.0061	0.3483	0.047*
C11	0.0261 (3)	0.7758 (7)	0.4251 (3)	0.0378 (10)
H11	−0.0164	0.7995	0.4675	0.045*
C12	0.0194 (3)	0.5796 (7)	0.3754 (3)	0.0385 (10)
H12	−0.0261	0.4709	0.3842	0.046*
C13	0.0800 (3)	0.5436 (7)	0.3127 (3)	0.0373 (10)
H13	0.0766	0.4098	0.2774	0.045*

Atomic displacement parameters (Ų)

	U^11	U^22	U^33	U^12	U^13	U^23
Br1	0.0307 (2)	0.0546 (3)	0.0530 (3)	−0.0087 (2)	0.00510 (18)	0.0004 (2)
O1	0.0347 (15)	0.0333 (16)	0.0524 (19)	−0.0090 (13)	0.0140 (14)	0.0004 (15)
N1	0.0286 (16)	0.043 (2)	0.0354 (19)	0.0039 (15)	0.0092 (15)	−0.0030 (16)
N2	0.0347 (18)	0.046 (2)	0.047 (2)	−0.0025 (16)	0.0159 (17)	−0.0081 (18)
C1	0.0302 (19)	0.027 (2)	0.0246 (19)	−0.0023 (15)	0.0093 (16)	−0.0021 (15)
C2	0.0327 (19)	0.030 (2)	0.0245 (19)	−0.0043 (17)	0.0121 (16)	−0.0047 (17)
C3	0.041 (2)	0.033 (2)	0.032 (2)	0.0032 (18)	0.0174 (18)	0.0026 (18)
C4	0.035 (2)	0.040 (3)	0.028 (2)	0.0048 (18)	0.0087 (17)	0.0010 (18)
C5	0.0261 (18)	0.038 (2)	0.030 (2)	−0.0020 (16)	0.0106 (16)	−0.0028 (17)
C6	0.035 (2)	0.031 (2)	0.028 (2)	−0.0013 (16)	0.0114 (17)	0.0003 (16)
C7	0.035 (2)	0.033 (2)	0.026 (2)	0.0058 (17)	0.0119 (17)	−0.0034 (16)
C8	0.031 (2)	0.057 (3)	0.035 (2)	0.010 (2)	0.0053 (18)	0.002 (2)
C9	0.0216 (17)	0.040 (2)	0.031 (2)	0.0056 (17)	0.0015 (15)	−0.0001 (19)
C10	0.029 (2)	0.042 (3)	0.046 (3)	−0.0068 (18)	0.0092 (19)	−0.004 (2)
C11	0.0271 (19)	0.050 (3)	0.038 (2)	−0.0008 (19)	0.0098 (17)	−0.001 (2)
C12	0.034 (2)	0.042 (3)	0.041 (2)	−0.0079 (19)	0.0106 (19)	0.006 (2)
C13	0.039 (2)	0.036 (2)	0.033 (2)	−0.0008 (19)	0.0008 (18)	−0.0017 (18)

Geometric parameters (Å, º)

Br1—C5	1.903 (4)	C5—C6	1.369 (5)
O1—C2	1.352 (4)	C6—H6	0.9500
O1—H1	0.96 (5)	C7—H7	0.9500
N1—C7	1.271 (5)	C8—C9	1.517 (5)
N1—C8	1.468 (5)	C8—H8A	0.9900
N2—C11	1.331 (5)	C8—H8B	0.9900
N2—C10	1.344 (5)	C9—C10	1.379 (6)
C1—C6	1.406 (5)	C9—C13	1.381 (5)
C1—C2	1.408 (5)	C10—H10	0.9500
C1—C7	1.456 (5)	C11—C12	1.377 (6)
C2—C3	1.397 (5)	C11—H11	0.9500
C3—C4	1.372 (5)	C12—C13	1.382 (6)
C3—H3	0.9500	C12—H12	0.9500
C4—C5	1.384 (5)	C13—H13	0.9500
C4—H4	0.9500
C2—O1—H1	112 (3)	C1—C7—H7	119.2
C7—N1—C8	117.6 (4)	N1—C8—C9	110.4 (3)
C11—N2—C10	116.1 (4)	N1—C8—H8A	109.6
C6—C1—C2	118.5 (3)	C9—C8—H8A	109.6
C6—C1—C7	119.5 (3)	N1—C8—H8B	109.6
C2—C1—C7	121.9 (3)	C9—C8—H8B	109.6
O1—C2—C3	119.1 (4)	H8A—C8—H8B	108.1
O1—C2—C1	121.2 (3)	C10—C9—C13	117.4 (4)
C3—C2—C1	119.6 (3)	C10—C9—C8	120.4 (4)
C4—C3—C2	120.7 (4)	C13—C9—C8	122.2 (4)
C4—C3—H3	119.6	N2—C10—C9	124.8 (4)
C2—C3—H3	119.6	N2—C10—H10	117.6
C3—C4—C5	119.7 (4)	C9—C10—H10	117.6
C3—C4—H4	120.2	N2—C11—C12	123.8 (4)
C5—C4—H4	120.2	N2—C11—H11	118.1
C6—C5—C4	121.0 (4)	C12—C11—H11	118.1
C6—C5—Br1	119.2 (3)	C11—C12—C13	118.8 (4)
C4—C5—Br1	119.7 (3)	C11—C12—H12	120.6
C5—C6—C1	120.4 (4)	C13—C12—H12	120.6
C5—C6—H6	119.8	C9—C13—C12	119.1 (4)
C1—C6—H6	119.8	C9—C13—H13	120.5
N1—C7—C1	121.7 (4)	C12—C13—H13	120.5
N1—C7—H7	119.2
C6—C1—C2—O1	179.8 (3)	C6—C1—C7—N1	−178.0 (4)
C7—C1—C2—O1	1.8 (5)	C2—C1—C7—N1	0.0 (5)
C6—C1—C2—C3	0.4 (5)	C7—N1—C8—C9	−118.3 (4)
C7—C1—C2—C3	−177.6 (3)	N1—C8—C9—C10	98.1 (5)
O1—C2—C3—C4	−179.0 (3)	N1—C8—C9—C13	−81.3 (5)
C1—C2—C3—C4	0.4 (5)	C11—N2—C10—C9	−0.4 (6)
C2—C3—C4—C5	−0.3 (6)	C13—C9—C10—N2	−0.1 (6)
C3—C4—C5—C6	−0.6 (6)	C8—C9—C10—N2	−179.5 (4)
C3—C4—C5—Br1	176.2 (3)	C10—N2—C11—C12	0.8 (6)
C4—C5—C6—C1	1.3 (6)	N2—C11—C12—C13	−0.7 (6)
Br1—C5—C6—C1	−175.5 (3)	C10—C9—C13—C12	0.2 (6)
C2—C1—C6—C5	−1.2 (5)	C8—C9—C13—C12	179.6 (4)
C7—C1—C6—C5	176.8 (3)	C11—C12—C13—C9	0.2 (6)
C8—N1—C7—C1	178.6 (3)

Hydrogen-bond geometry (Å, º)

D—H···A	D—H	H···A	D···A	D—H···A
O1—H1···N1	0.96 (5)	1.80 (5)	2.616 (5)	141 (5)