organic compounds
2-Bromo-4-chloro-6-{(E)-[4-(diethylamino)phenyl]iminomethyl}phenol
aDepartment of Chemistry, Anand Institute of Higher Technology, Kazhipattur, Chennai 603 103, India, bDepartment of Physics, Presidency College (Autonomous), Chennai 600 005, India, cDepartment of Chemistry, Pondicherry University, Pondicherry 605 014, India, and dDepartment of Chemistry, Government Arts College, Melur 625 106, India
*Correspondence e-mail: as_pandian59@yahoo.com
In the title compound, C17H18BrClN2O, the dihedral angle between the aromatic rings is 3.0 (1)°. The methylethanamine group assumes an extended conformation. An intramolecular O—H⋯N hydrogen bond generates an S(6) ring motif. The crystal packing is stabilized by C—H⋯π and π–π [centroid–centroid distances = 3.691 (1) and 3.632 (1) Å] interactions.
Related literature
For Schiff base compounds in coordination chemistry, see: Weber et al. (2007); Chen et al. (2008) and for their role in biological processes, see: May et al. (2004). For hydrogen-bond motifs, see: Bernstein et al. (1995). For related structures, see: Raja et al. (2008).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2004); cell SAINT (Bruker, 2004); 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); software used to prepare material for publication: SHELXL97 and PLATON (Spek, 2009).
Supporting information
https://doi.org/10.1107/S1600536810033738/gw2086sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810033738/gw2086Isup2.hkl
An ethanoic solution (20 ml) N,N-Diethyl aniline (10 mmol) was magnetically stirred in a round bottom flask followed by dropwise addition of Bromo- Chloro Salicylaldehyde (10 mmol). The reaction mixture was then refluxed for three hours and upon cooling to 0°C an red crystalline solid precipitates from the mixture. The solid which is separated out was filtered washed with ice cold ethanol and dried in vaccuo over anhydrous CaCl2. Single crystals suitable for the X-ray diffraction were obtained by slow evaporation of a solution of the title compound in ethyl acetate at room temperature.
All the H atoms were positioned geometrically, with O—H = 0.82 Å and C—H = 0.93 - 0.98 Å and constrained to ride on their parent atom, with UisoH=1.2Ueq(C).
The Schiff base compounds have received considerable attention for many years, primarily due to their importance in the development of coordination chemistry related to magnetism (Weber et al., 2007), catalysis (Chen et al., 2008) and biological process (May et al., 2004). Against this background, and in order to obtain detailed information on molecular conformations in the solid state, X-ray studies of the title compound have been carried out.
X-Ray analysis confirms the molecular structure and atom connectivity as illustrated in Fig. 1. The geometric parameters of the title molecule agrees well with those reported for a similar structure (Raja et al., 2008). The methylethanamine moiety assumes an extended conformation as can be seen from torsion angles C15–C14–N2–C11 of 76.5 (2)° and C17–C16–N2–C11 of -74.1 (2)°. The atoms Cl1, Br1 and O1 are deviated by -0.039 (1), 0.009 (1) and -0.040 (2)Å from the least square plane of the ring C1–C6 and also atoms N1 and N2 are deviated by 0.016 (2) and -0.029 (2)Å from the least square plane of the ring C8–C13. The dihedral angle between the aromatic rings is 3.0 (1)°, shows that both the rings(C1–C6 and C8–C13) are almost coplanar.
In addition to the van der Waals interactions, the crystal packing is stabilized by O–H···N and C–H···π hydrogen bonds (Table. 1) as well as by π–π electron interaction. The intramolecular O–H···N hydrogen bond which generates an S(6) ring motif (Fig.1) (Bernstein et al., 1995). The π–π electron interactions between the rings Cg1···Cg1 and Cg1···Cg2 at -x, 1 - y, 1 - z and -x, -y, 1 - z with the centroid–centroid distance equal to 3.691 (1) and 3.632 (1) Å, respectively are observed in the [Cg1 and Cg2 are the centroids of the rings C1–C6 and C8–C13].
For Schiff base compounds in coordination chemistry, see: Weber et al. (2007); Chen et al. (2008)and for their role in biological processes, see: May et al. (2004). For hydrogen-bond motifs, see: Bernstein et al. (1995). For related structures, see: Raja et al. (2008).
Data collection: APEX2 (Bruker, 2004); cell
SAINT (Bruker, 2004); data reduction: SAINT (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009).C17H18BrClN2O | F(000) = 776 |
Mr = 381.69 | Dx = 1.528 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 4383 reflections |
a = 11.3427 (3) Å | θ = 1.9–28.9° |
b = 10.9204 (3) Å | µ = 2.64 mm−1 |
c = 14.3869 (4) Å | T = 293 K |
β = 111.418 (2)° | Block, colourless |
V = 1658.99 (8) Å3 | 0.21 × 0.19 × 0.17 mm |
Z = 4 |
Bruker Kappa APEXII CCD diffractometer | 4383 independent reflections |
Radiation source: fine-focus sealed tube | 2797 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.034 |
ω scans | θmax = 28.9°, θmin = 1.9° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −14→15 |
Tmin = 0.972, Tmax = 0.977 | k = −14→14 |
19985 measured reflections | l = −18→19 |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.034 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.088 | H-atom parameters constrained |
S = 1.00 | w = 1/[σ2(Fo2) + (0.0389P)2 + 0.3262P] where P = (Fo2 + 2Fc2)/3 |
4383 reflections | (Δ/σ)max < 0.001 |
202 parameters | Δρmax = 0.27 e Å−3 |
0 restraints | Δρmin = −0.28 e Å−3 |
C17H18BrClN2O | V = 1658.99 (8) Å3 |
Mr = 381.69 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 11.3427 (3) Å | µ = 2.64 mm−1 |
b = 10.9204 (3) Å | T = 293 K |
c = 14.3869 (4) Å | 0.21 × 0.19 × 0.17 mm |
β = 111.418 (2)° |
Bruker Kappa APEXII CCD diffractometer | 4383 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 2797 reflections with I > 2σ(I) |
Tmin = 0.972, Tmax = 0.977 | Rint = 0.034 |
19985 measured reflections |
R[F2 > 2σ(F2)] = 0.034 | 0 restraints |
wR(F2) = 0.088 | H-atom parameters constrained |
S = 1.00 | Δρmax = 0.27 e Å−3 |
4383 reflections | Δρmin = −0.28 e Å−3 |
202 parameters |
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. |
x | y | z | Uiso*/Ueq | ||
C1 | −0.10155 (19) | 0.32018 (18) | 0.54970 (15) | 0.0458 (5) | |
H1 | −0.1023 | 0.2923 | 0.6106 | 0.055* | |
C2 | −0.17812 (19) | 0.41572 (19) | 0.50175 (15) | 0.0443 (5) | |
C3 | −0.17718 (19) | 0.45989 (18) | 0.41258 (15) | 0.0456 (5) | |
H3 | −0.2285 | 0.5256 | 0.3812 | 0.055* | |
C4 | −0.09947 (18) | 0.40567 (19) | 0.37050 (14) | 0.0434 (5) | |
C5 | −0.02201 (17) | 0.30769 (18) | 0.41549 (14) | 0.0412 (4) | |
C6 | −0.02323 (17) | 0.26536 (17) | 0.50738 (14) | 0.0398 (4) | |
C7 | 0.05636 (18) | 0.16390 (18) | 0.55862 (15) | 0.0450 (5) | |
H7 | 0.0544 | 0.1382 | 0.6197 | 0.054* | |
C8 | 0.20773 (17) | 0.01035 (17) | 0.57157 (15) | 0.0393 (4) | |
C9 | 0.28861 (19) | −0.03587 (18) | 0.52790 (14) | 0.0443 (5) | |
H9 | 0.2875 | −0.0019 | 0.4683 | 0.053* | |
C10 | 0.37053 (19) | −0.13055 (19) | 0.56995 (14) | 0.0457 (5) | |
H10 | 0.4238 | −0.1589 | 0.5385 | 0.055* | |
C11 | 0.37521 (17) | −0.18518 (17) | 0.65933 (14) | 0.0393 (4) | |
C12 | 0.29288 (18) | −0.13766 (18) | 0.70294 (15) | 0.0446 (5) | |
H12 | 0.2933 | −0.1712 | 0.7625 | 0.054* | |
C13 | 0.21127 (18) | −0.04266 (18) | 0.66006 (16) | 0.0441 (5) | |
H13 | 0.1577 | −0.0136 | 0.6910 | 0.053* | |
C14 | 0.5476 (2) | −0.3221 (2) | 0.66057 (16) | 0.0530 (5) | |
H14A | 0.5074 | −0.3263 | 0.5885 | 0.064* | |
H14B | 0.5745 | −0.4042 | 0.6846 | 0.064* | |
C15 | 0.6624 (2) | −0.2420 (3) | 0.6864 (2) | 0.0701 (7) | |
H15A | 0.6367 | −0.1591 | 0.6672 | 0.105* | |
H15B | 0.7150 | −0.2701 | 0.6515 | 0.105* | |
H15C | 0.7091 | −0.2454 | 0.7570 | 0.105* | |
C16 | 0.4686 (2) | −0.3271 (2) | 0.79959 (16) | 0.0576 (6) | |
H16A | 0.5081 | −0.4072 | 0.8084 | 0.069* | |
H16B | 0.3851 | −0.3373 | 0.8026 | 0.069* | |
C17 | 0.5454 (2) | −0.2467 (3) | 0.88435 (17) | 0.0756 (8) | |
H17A | 0.6295 | −0.2386 | 0.8840 | 0.113* | |
H17B | 0.5494 | −0.2826 | 0.9463 | 0.113* | |
H17C | 0.5066 | −0.1674 | 0.8771 | 0.113* | |
N1 | 0.12906 (14) | 0.10877 (15) | 0.52225 (12) | 0.0432 (4) | |
N2 | 0.45430 (15) | −0.28149 (15) | 0.70127 (12) | 0.0462 (4) | |
Cl1 | −0.27823 (7) | 0.48188 (6) | 0.55421 (5) | 0.07030 (19) | |
Br1 | −0.09834 (3) | 0.46511 (3) | 0.248320 (18) | 0.07298 (12) | |
O1 | 0.04963 (14) | 0.25578 (15) | 0.37088 (11) | 0.0584 (4) | |
H1A | 0.0942 | 0.2028 | 0.4074 | 0.088* |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0515 (12) | 0.0407 (11) | 0.0471 (11) | −0.0004 (9) | 0.0205 (9) | 0.0027 (9) |
C2 | 0.0473 (11) | 0.0392 (11) | 0.0513 (12) | 0.0029 (9) | 0.0238 (9) | −0.0033 (9) |
C3 | 0.0467 (11) | 0.0368 (11) | 0.0504 (12) | 0.0064 (9) | 0.0144 (9) | 0.0023 (9) |
C4 | 0.0454 (11) | 0.0435 (12) | 0.0404 (10) | 0.0014 (9) | 0.0146 (9) | 0.0028 (9) |
C5 | 0.0361 (10) | 0.0411 (11) | 0.0455 (11) | −0.0008 (8) | 0.0137 (8) | −0.0042 (9) |
C6 | 0.0382 (10) | 0.0325 (10) | 0.0465 (11) | −0.0027 (8) | 0.0127 (8) | 0.0002 (9) |
C7 | 0.0430 (11) | 0.0403 (11) | 0.0498 (11) | 0.0003 (9) | 0.0146 (9) | 0.0063 (9) |
C8 | 0.0317 (9) | 0.0362 (10) | 0.0446 (10) | −0.0018 (8) | 0.0073 (8) | −0.0015 (8) |
C9 | 0.0468 (11) | 0.0466 (12) | 0.0365 (9) | 0.0018 (9) | 0.0118 (8) | 0.0019 (9) |
C10 | 0.0487 (11) | 0.0493 (13) | 0.0397 (10) | 0.0092 (9) | 0.0166 (9) | −0.0005 (9) |
C11 | 0.0366 (10) | 0.0368 (10) | 0.0398 (10) | 0.0008 (8) | 0.0082 (8) | −0.0027 (8) |
C12 | 0.0438 (11) | 0.0461 (12) | 0.0444 (10) | 0.0017 (9) | 0.0167 (9) | 0.0060 (9) |
C13 | 0.0384 (10) | 0.0451 (12) | 0.0515 (11) | 0.0040 (9) | 0.0195 (9) | 0.0028 (10) |
C14 | 0.0579 (13) | 0.0475 (13) | 0.0525 (12) | 0.0171 (10) | 0.0189 (10) | 0.0001 (10) |
C15 | 0.0561 (14) | 0.0846 (19) | 0.0759 (16) | 0.0073 (13) | 0.0316 (13) | −0.0034 (15) |
C16 | 0.0572 (14) | 0.0560 (14) | 0.0612 (14) | 0.0143 (11) | 0.0236 (11) | 0.0179 (12) |
C17 | 0.0747 (17) | 0.103 (2) | 0.0468 (13) | 0.0149 (16) | 0.0191 (12) | 0.0031 (14) |
N1 | 0.0349 (8) | 0.0399 (9) | 0.0490 (9) | 0.0008 (7) | 0.0085 (7) | 0.0018 (8) |
N2 | 0.0459 (9) | 0.0451 (10) | 0.0462 (9) | 0.0102 (8) | 0.0152 (8) | 0.0054 (8) |
Cl1 | 0.0855 (4) | 0.0679 (4) | 0.0736 (4) | 0.0250 (3) | 0.0482 (4) | 0.0040 (3) |
Br1 | 0.0821 (2) | 0.0911 (2) | 0.05317 (15) | 0.02883 (15) | 0.03355 (13) | 0.02548 (13) |
O1 | 0.0581 (9) | 0.0646 (11) | 0.0610 (9) | 0.0203 (8) | 0.0318 (8) | 0.0094 (8) |
C1—C2 | 1.372 (3) | C11—N2 | 1.371 (2) |
C1—C6 | 1.383 (3) | C11—C12 | 1.401 (3) |
C1—H1 | 0.9300 | C12—C13 | 1.377 (3) |
C2—C3 | 1.374 (3) | C12—H12 | 0.9300 |
C2—Cl1 | 1.734 (2) | C13—H13 | 0.9300 |
C3—C4 | 1.373 (3) | C14—N2 | 1.453 (3) |
C3—H3 | 0.9300 | C14—C15 | 1.499 (3) |
C4—C5 | 1.386 (3) | C14—H14A | 0.9700 |
C4—Br1 | 1.878 (2) | C14—H14B | 0.9700 |
C5—O1 | 1.332 (2) | C15—H15A | 0.9600 |
C5—C6 | 1.405 (3) | C15—H15B | 0.9600 |
C6—C7 | 1.449 (3) | C15—H15C | 0.9600 |
C7—N1 | 1.277 (3) | C16—N2 | 1.452 (3) |
C7—H7 | 0.9300 | C16—C17 | 1.497 (3) |
C8—C9 | 1.383 (3) | C16—H16A | 0.9700 |
C8—C13 | 1.386 (3) | C16—H16B | 0.9700 |
C8—N1 | 1.412 (2) | C17—H17A | 0.9600 |
C9—C10 | 1.374 (3) | C17—H17B | 0.9600 |
C9—H9 | 0.9300 | C17—H17C | 0.9600 |
C10—C11 | 1.401 (3) | O1—H1A | 0.8200 |
C10—H10 | 0.9300 | ||
C2—C1—C6 | 119.89 (19) | C13—C12—H12 | 119.1 |
C2—C1—H1 | 120.1 | C11—C12—H12 | 119.1 |
C6—C1—H1 | 120.1 | C12—C13—C8 | 121.03 (19) |
C1—C2—C3 | 121.14 (19) | C12—C13—H13 | 119.5 |
C1—C2—Cl1 | 119.54 (16) | C8—C13—H13 | 119.5 |
C3—C2—Cl1 | 119.32 (16) | N2—C14—C15 | 114.65 (19) |
C4—C3—C2 | 119.05 (18) | N2—C14—H14A | 108.6 |
C4—C3—H3 | 120.5 | C15—C14—H14A | 108.6 |
C2—C3—H3 | 120.5 | N2—C14—H14B | 108.6 |
C3—C4—C5 | 121.78 (19) | C15—C14—H14B | 108.6 |
C3—C4—Br1 | 119.25 (15) | H14A—C14—H14B | 107.6 |
C5—C4—Br1 | 118.96 (15) | C14—C15—H15A | 109.5 |
O1—C5—C4 | 119.85 (18) | C14—C15—H15B | 109.5 |
O1—C5—C6 | 122.04 (17) | H15A—C15—H15B | 109.5 |
C4—C5—C6 | 118.11 (18) | C14—C15—H15C | 109.5 |
C1—C6—C5 | 120.02 (18) | H15A—C15—H15C | 109.5 |
C1—C6—C7 | 119.20 (18) | H15B—C15—H15C | 109.5 |
C5—C6—C7 | 120.78 (18) | N2—C16—C17 | 114.7 (2) |
N1—C7—C6 | 121.83 (19) | N2—C16—H16A | 108.6 |
N1—C7—H7 | 119.1 | C17—C16—H16A | 108.6 |
C6—C7—H7 | 119.1 | N2—C16—H16B | 108.6 |
C9—C8—C13 | 117.61 (18) | C17—C16—H16B | 108.6 |
C9—C8—N1 | 116.88 (18) | H16A—C16—H16B | 107.6 |
C13—C8—N1 | 125.51 (19) | C16—C17—H17A | 109.5 |
C10—C9—C8 | 121.93 (19) | C16—C17—H17B | 109.5 |
C10—C9—H9 | 119.0 | H17A—C17—H17B | 109.5 |
C8—C9—H9 | 119.0 | C16—C17—H17C | 109.5 |
C9—C10—C11 | 121.17 (19) | H17A—C17—H17C | 109.5 |
C9—C10—H10 | 119.4 | H17B—C17—H17C | 109.5 |
C11—C10—H10 | 119.4 | C7—N1—C8 | 122.49 (18) |
N2—C11—C12 | 121.54 (18) | C11—N2—C16 | 120.96 (17) |
N2—C11—C10 | 122.01 (18) | C11—N2—C14 | 120.81 (17) |
C12—C11—C10 | 116.44 (17) | C16—N2—C14 | 116.70 (16) |
C13—C12—C11 | 121.82 (19) | C5—O1—H1A | 109.5 |
C6—C1—C2—C3 | −1.1 (3) | C8—C9—C10—C11 | 0.3 (3) |
C6—C1—C2—Cl1 | 178.74 (15) | C9—C10—C11—N2 | 178.53 (18) |
C1—C2—C3—C4 | 1.0 (3) | C9—C10—C11—C12 | −0.3 (3) |
Cl1—C2—C3—C4 | −178.80 (15) | N2—C11—C12—C13 | −178.59 (18) |
C2—C3—C4—C5 | 0.0 (3) | C10—C11—C12—C13 | 0.3 (3) |
C2—C3—C4—Br1 | 179.70 (15) | C11—C12—C13—C8 | −0.2 (3) |
C3—C4—C5—O1 | 178.33 (19) | C9—C8—C13—C12 | 0.2 (3) |
Br1—C4—C5—O1 | −1.4 (3) | N1—C8—C13—C12 | −179.17 (18) |
C3—C4—C5—C6 | −0.9 (3) | C6—C7—N1—C8 | 179.57 (17) |
Br1—C4—C5—C6 | 179.36 (14) | C9—C8—N1—C7 | −175.52 (18) |
C2—C1—C6—C5 | 0.1 (3) | C13—C8—N1—C7 | 3.9 (3) |
C2—C1—C6—C7 | −179.53 (18) | C12—C11—N2—C16 | −8.6 (3) |
O1—C5—C6—C1 | −178.37 (18) | C10—C11—N2—C16 | 172.58 (19) |
C4—C5—C6—C1 | 0.9 (3) | C12—C11—N2—C14 | −174.04 (18) |
O1—C5—C6—C7 | 1.3 (3) | C10—C11—N2—C14 | 7.2 (3) |
C4—C5—C6—C7 | −179.49 (18) | C17—C16—N2—C11 | −74.1 (2) |
C1—C6—C7—N1 | 178.95 (18) | C17—C16—N2—C14 | 91.9 (2) |
C5—C6—C7—N1 | −0.7 (3) | C15—C14—N2—C11 | 76.5 (2) |
C13—C8—C9—C10 | −0.3 (3) | C15—C14—N2—C16 | −89.5 (2) |
N1—C8—C9—C10 | 179.17 (18) |
Cg2 is the centroid of the C8–C13 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1A···N1 | 0.82 | 1.86 | 2.588 (2) | 147 |
C16—H16A···Cg2i | 0.96 | 2.90 | 3.814 (2) | 157 |
Symmetry code: (i) −x+1, y−1/2, −z+3/2. |
Experimental details
Crystal data | |
Chemical formula | C17H18BrClN2O |
Mr | 381.69 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 293 |
a, b, c (Å) | 11.3427 (3), 10.9204 (3), 14.3869 (4) |
β (°) | 111.418 (2) |
V (Å3) | 1658.99 (8) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 2.64 |
Crystal size (mm) | 0.21 × 0.19 × 0.17 |
Data collection | |
Diffractometer | Bruker Kappa APEXII CCD |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.972, 0.977 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 19985, 4383, 2797 |
Rint | 0.034 |
(sin θ/λ)max (Å−1) | 0.680 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.034, 0.088, 1.00 |
No. of reflections | 4383 |
No. of parameters | 202 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.27, −0.28 |
Computer programs: APEX2 (Bruker, 2004), SAINT (Bruker, 2004), SHELXS97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997), SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009).
Cg2 is the centroid of the C8–C13 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1A···N1 | 0.82 | 1.86 | 2.588 (2) | 147 |
C16—H16A···Cg2i | 0.96 | 2.90 | 3.814 (2) | 157 |
Symmetry code: (i) −x+1, y−1/2, −z+3/2. |
Acknowledgements
KM and ASP thank Dr Babu Varghese, SAIF, IIT, Chennai, India, for the data collection.
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The Schiff base compounds have received considerable attention for many years, primarily due to their importance in the development of coordination chemistry related to magnetism (Weber et al., 2007), catalysis (Chen et al., 2008) and biological process (May et al., 2004). Against this background, and in order to obtain detailed information on molecular conformations in the solid state, X-ray studies of the title compound have been carried out.
X-Ray analysis confirms the molecular structure and atom connectivity as illustrated in Fig. 1. The geometric parameters of the title molecule agrees well with those reported for a similar structure (Raja et al., 2008). The methylethanamine moiety assumes an extended conformation as can be seen from torsion angles C15–C14–N2–C11 of 76.5 (2)° and C17–C16–N2–C11 of -74.1 (2)°. The atoms Cl1, Br1 and O1 are deviated by -0.039 (1), 0.009 (1) and -0.040 (2)Å from the least square plane of the ring C1–C6 and also atoms N1 and N2 are deviated by 0.016 (2) and -0.029 (2)Å from the least square plane of the ring C8–C13. The dihedral angle between the aromatic rings is 3.0 (1)°, shows that both the rings(C1–C6 and C8–C13) are almost coplanar.
In addition to the van der Waals interactions, the crystal packing is stabilized by O–H···N and C–H···π hydrogen bonds (Table. 1) as well as by π–π electron interaction. The intramolecular O–H···N hydrogen bond which generates an S(6) ring motif (Fig.1) (Bernstein et al., 1995). The π–π electron interactions between the rings Cg1···Cg1 and Cg1···Cg2 at -x, 1 - y, 1 - z and -x, -y, 1 - z with the centroid–centroid distance equal to 3.691 (1) and 3.632 (1) Å, respectively are observed in the crystal structure [Cg1 and Cg2 are the centroids of the rings C1–C6 and C8–C13].