organic compounds
N-(2,6-Dimethylphenyl)-2-methylbenzamide
aDepartment of Chemistry, Mangalore University, Mangalagangotri 574 199, Mangalore, India, and bInstitute of Materials Science, Darmstadt University of Technology, Petersenstrasse 23, D-64287 Darmstadt, Germany
*Correspondence e-mail: gowdabt@yahoo.com
In the title molecule, C16H17NO, the N—H and C=O groups are in the antiperiplanar conformation that has been observed in related compounds. Furthermore, the conformation of the C=O group with respect to the methyl substituent in the 2-methylphenyl ring is syn, as has also been observed in related structures. The amide group makes dihedral angles of 50.3 (3) and 64.6 (3)° with the 2-methylphenyl and 2,6-dimethylphenyl rings, respectively, while the angle between the planes of the two rings is 14.26 (7)°. The molecules are packed into chains via N—H⋯O hydrogen bonds. An intramolecular C—H⋯O hydrogen bond is also observed.
Related literature
For related literature, see: Gowda et al. (2003); Gowda, Foro et al. (2008); Gowda, Tokarčík et al. (2008).
Experimental
Crystal data
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Refinement
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Data collection: CrysAlis CCD (Oxford Diffraction, 2004); cell CrysAlis RED (Oxford Diffraction, 2007); data reduction: CrysAlis RED; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008) and JANA2000 (Petříček et al., 2000); molecular graphics: PLATON (Spek, 2003); software used to prepare material for publication: SHELXS97.
Supporting information
10.1107/S160053680802309X/fb2099sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S160053680802309X/fb2099Isup2.hkl
The title compound was prepared according to the method described by Gowda et al. (2003). The purity of the compound was checked by determining its melting point (136°C). The title compound was also characterized by recording its infrared and NMR spectra. Plate-like colourless layered crystals with edges in the range from 0.2 to 1.0 mm were obtained by slow evaporation at room temperature from an ethanol solution (0.5 g of the title compound in about 40 ml of ethanol).
All the hydrogen atoms could have been discerned in the difference Fourier map, nevertheless, all the H atoms attached to the carbon atoms were constrained in a riding motion approximation with Caryl—H = 0.95, Cmethyl—H = 0.98 Å, while UisoH = 1.2UeqC. The positional parameters of HN were refined freely. UisoHN = 1.2UeqN. Five not matching reflections (2 0 0; 2 1 1; 1 0 2; 1 1 2; 1 1 3) were omitted from the σ(Fo)>100 (Petříček et al., 2000).
since their |Fo-Fc)|/Data collection: CrysAlis CCD (Oxford Diffraction, 2004); cell
CrysAlis RED (Oxford Diffraction, 2007); data reduction: CrysAlis RED (Oxford Diffraction, 2007); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008) and JANA2000 (Petříček et al., 2000); molecular graphics: PLATON (Spek, 2003); software used to prepare material for publication: SHELXS97 (Sheldrick, 2008).C16H17NO | Dx = 1.228 Mg m−3 |
Mr = 239.31 | Melting point: 409 K |
Orthorhombic, Pbca | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ac 2ab | Cell parameters from 4403 reflections |
a = 11.687 (1) Å | θ = 2.2–28.0° |
b = 10.0187 (8) Å | µ = 0.08 mm−1 |
c = 22.108 (2) Å | T = 100 K |
V = 2588.6 (4) Å3 | Plate, colourless |
Z = 8 | 0.36 × 0.24 × 0.04 mm |
F(000) = 1024 |
Oxford Xcalibur diffractometer with Sapphire CCD detector | 2624 independent reflections |
Radiation source: fine-focus sealed tube | 1864 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.024 |
Rotation method data acquisition using ω and ϕ scans | θmax = 26.4°, θmin = 2.8° |
Absorption correction: multi-scan (CrysAlis RED; Oxford Diffraction, 2007) | h = −14→14 |
Tmin = 0.971, Tmax = 0.999 | k = −11→12 |
10773 measured reflections | l = −27→27 |
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)] = 0.037 | Hydrogen site location: difference Fourier map |
wR(F2) = 0.127 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.00 | w = 1/[σ2(Fo2) + (0.0871P)2 + 0.016P] where P = (Fo2 + 2Fc2)/3 |
2624 reflections | (Δ/σ)max < 0.001 |
169 parameters | Δρmax = 0.27 e Å−3 |
0 restraints | Δρmin = −0.21 e Å−3 |
62 constraints |
C16H17NO | V = 2588.6 (4) Å3 |
Mr = 239.31 | Z = 8 |
Orthorhombic, Pbca | Mo Kα radiation |
a = 11.687 (1) Å | µ = 0.08 mm−1 |
b = 10.0187 (8) Å | T = 100 K |
c = 22.108 (2) Å | 0.36 × 0.24 × 0.04 mm |
Oxford Xcalibur diffractometer with Sapphire CCD detector | 2624 independent reflections |
Absorption correction: multi-scan (CrysAlis RED; Oxford Diffraction, 2007) | 1864 reflections with I > 2σ(I) |
Tmin = 0.971, Tmax = 0.999 | Rint = 0.024 |
10773 measured reflections |
R[F2 > 2σ(F2)] = 0.037 | 0 restraints |
wR(F2) = 0.127 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.00 | Δρmax = 0.27 e Å−3 |
2624 reflections | Δρmin = −0.21 e Å−3 |
169 parameters |
Experimental. CrysAlis RED, Oxford Diffraction Ltd., 2007 Empirical absorption correction using spherical harmonics, implemented in SCALE3 ABSPACK scaling algorithm. |
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 | 0.66409 (12) | 0.10525 (13) | 0.52066 (6) | 0.0192 (3) | |
C2 | 0.71926 (13) | 0.06605 (13) | 0.46747 (6) | 0.0220 (3) | |
C3 | 0.66617 (14) | 0.09420 (15) | 0.41272 (7) | 0.0286 (4) | |
H3 | 0.7031 | 0.0707 | 0.3760 | 0.034* | |
C4 | 0.56017 (15) | 0.15594 (14) | 0.41088 (7) | 0.0311 (4) | |
H4 | 0.5253 | 0.1753 | 0.3731 | 0.037* | |
C5 | 0.50550 (13) | 0.18914 (14) | 0.46372 (7) | 0.0275 (4) | |
H5 | 0.4319 | 0.2291 | 0.4620 | 0.033* | |
C6 | 0.55589 (12) | 0.16532 (13) | 0.52008 (6) | 0.0214 (3) | |
C7 | 0.76049 (11) | 0.17701 (13) | 0.61334 (6) | 0.0188 (3) | |
C8 | 0.83330 (12) | 0.13044 (13) | 0.66513 (6) | 0.0204 (3) | |
C9 | 0.81566 (13) | 0.17869 (13) | 0.72420 (7) | 0.0238 (3) | |
C10 | 0.88936 (13) | 0.13316 (14) | 0.76907 (7) | 0.0302 (4) | |
H10 | 0.8775 | 0.1622 | 0.8095 | 0.036* | |
C11 | 0.97939 (14) | 0.04706 (16) | 0.75717 (7) | 0.0318 (4) | |
H11 | 1.0285 | 0.0188 | 0.7889 | 0.038* | |
C12 | 0.99719 (13) | 0.00269 (15) | 0.69892 (8) | 0.0298 (4) | |
H12 | 1.0596 | −0.0549 | 0.6901 | 0.036* | |
C13 | 0.92333 (13) | 0.04273 (14) | 0.65328 (7) | 0.0244 (3) | |
H13 | 0.9342 | 0.0100 | 0.6134 | 0.029* | |
C14 | 0.83131 (13) | −0.00795 (15) | 0.46972 (7) | 0.0277 (4) | |
H14A | 0.8217 | −0.0904 | 0.4930 | 0.033* | |
H14B | 0.8893 | 0.0482 | 0.4891 | 0.033* | |
H14C | 0.8558 | −0.0298 | 0.4285 | 0.033* | |
C15 | 0.49430 (12) | 0.20052 (15) | 0.57709 (7) | 0.0270 (4) | |
H15A | 0.5274 | 0.2820 | 0.5943 | 0.032* | |
H15B | 0.5019 | 0.1273 | 0.6062 | 0.032* | |
H15C | 0.4131 | 0.2154 | 0.5682 | 0.032* | |
C16 | 0.72240 (14) | 0.27522 (16) | 0.73949 (7) | 0.0319 (4) | |
H16A | 0.6542 | 0.2545 | 0.7155 | 0.038* | |
H16B | 0.7479 | 0.3662 | 0.7304 | 0.038* | |
H16C | 0.7040 | 0.2682 | 0.7826 | 0.038* | |
O1 | 0.74295 (8) | 0.29638 (10) | 0.60380 (4) | 0.0221 (3) | |
N1 | 0.71980 (10) | 0.07909 (12) | 0.57731 (5) | 0.0198 (3) | |
H1N | 0.7370 (13) | −0.0079 (17) | 0.5864 (7) | 0.024* |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0241 (7) | 0.0121 (7) | 0.0214 (7) | −0.0040 (6) | −0.0027 (6) | 0.0008 (5) |
C2 | 0.0294 (8) | 0.0141 (7) | 0.0226 (8) | −0.0037 (6) | −0.0004 (6) | 0.0003 (5) |
C3 | 0.0437 (10) | 0.0198 (8) | 0.0223 (7) | −0.0024 (7) | −0.0011 (7) | −0.0009 (6) |
C4 | 0.0469 (10) | 0.0206 (8) | 0.0259 (8) | −0.0016 (8) | −0.0131 (7) | 0.0003 (6) |
C5 | 0.0293 (8) | 0.0167 (7) | 0.0364 (9) | 0.0004 (7) | −0.0101 (7) | −0.0005 (6) |
C6 | 0.0247 (7) | 0.0128 (7) | 0.0266 (8) | −0.0047 (6) | −0.0035 (6) | 0.0012 (6) |
C7 | 0.0199 (7) | 0.0159 (8) | 0.0208 (7) | −0.0020 (6) | 0.0058 (6) | 0.0001 (6) |
C8 | 0.0243 (7) | 0.0141 (7) | 0.0228 (8) | −0.0052 (6) | −0.0003 (6) | 0.0029 (5) |
C9 | 0.0284 (7) | 0.0180 (7) | 0.0251 (8) | −0.0050 (6) | −0.0010 (6) | −0.0009 (6) |
C10 | 0.0403 (9) | 0.0270 (8) | 0.0235 (8) | −0.0038 (7) | −0.0063 (7) | −0.0011 (6) |
C11 | 0.0337 (8) | 0.0290 (8) | 0.0326 (9) | −0.0019 (7) | −0.0136 (7) | 0.0053 (7) |
C12 | 0.0266 (8) | 0.0256 (8) | 0.0372 (10) | 0.0017 (7) | −0.0050 (7) | 0.0027 (7) |
C13 | 0.0280 (8) | 0.0184 (7) | 0.0267 (8) | −0.0009 (7) | −0.0011 (6) | 0.0009 (6) |
C14 | 0.0339 (8) | 0.0245 (8) | 0.0246 (8) | 0.0035 (7) | 0.0050 (7) | −0.0006 (6) |
C15 | 0.0242 (7) | 0.0223 (8) | 0.0346 (9) | 0.0002 (7) | 0.0030 (7) | 0.0012 (6) |
C16 | 0.0402 (9) | 0.0327 (9) | 0.0227 (8) | −0.0003 (8) | −0.0003 (7) | −0.0037 (7) |
O1 | 0.0275 (6) | 0.0139 (5) | 0.0250 (6) | −0.0004 (4) | 0.0020 (4) | 0.0014 (4) |
N1 | 0.0260 (6) | 0.0142 (6) | 0.0193 (6) | 0.0019 (5) | −0.0025 (5) | 0.0018 (5) |
C1—C2 | 1.397 (2) | C9—C16 | 1.496 (2) |
C1—C6 | 1.400 (2) | C10—C11 | 1.386 (2) |
C1—N1 | 1.4357 (17) | C10—H10 | 0.9500 |
C2—C3 | 1.389 (2) | C11—C12 | 1.378 (2) |
C2—C14 | 1.506 (2) | C11—H11 | 0.9500 |
C3—C4 | 1.385 (2) | C12—C13 | 1.387 (2) |
C3—H3 | 0.9500 | C12—H12 | 0.9500 |
C4—C5 | 1.372 (2) | C13—H13 | 0.9500 |
C4—H4 | 0.9500 | C14—H14A | 0.9800 |
C5—C6 | 1.399 (2) | C14—H14B | 0.9800 |
C5—H5 | 0.9500 | C14—H14C | 0.9800 |
C6—C15 | 1.494 (2) | C15—H15A | 0.9800 |
C7—O1 | 1.2316 (17) | C15—H15B | 0.9800 |
C7—N1 | 1.3502 (18) | C15—H15C | 0.9800 |
C7—C8 | 1.5009 (19) | C16—H16A | 0.9800 |
C8—C13 | 1.396 (2) | C16—H16B | 0.9800 |
C8—C9 | 1.408 (2) | C16—H16C | 0.9800 |
C9—C10 | 1.391 (2) | N1—H1N | 0.917 (17) |
C2—C1—C6 | 121.98 (13) | C12—C11—C10 | 119.52 (14) |
C2—C1—N1 | 118.27 (12) | C12—C11—H11 | 120.2 |
C6—C1—N1 | 119.73 (12) | C10—C11—H11 | 120.2 |
C3—C2—C1 | 118.04 (13) | C11—C12—C13 | 119.50 (15) |
C3—C2—C14 | 121.15 (13) | C11—C12—H12 | 120.2 |
C1—C2—C14 | 120.78 (12) | C13—C12—H12 | 120.2 |
C4—C3—C2 | 121.05 (14) | C12—C13—C8 | 120.98 (14) |
C4—C3—H3 | 119.5 | C12—C13—H13 | 119.5 |
C2—C3—H3 | 119.5 | C8—C13—H13 | 119.5 |
C5—C4—C3 | 119.97 (14) | C2—C14—H14A | 109.5 |
C5—C4—H4 | 120.0 | C2—C14—H14B | 109.5 |
C3—C4—H4 | 120.0 | H14A—C14—H14B | 109.5 |
C4—C5—C6 | 121.39 (14) | C2—C14—H14C | 109.5 |
C4—C5—H5 | 119.3 | H14A—C14—H14C | 109.5 |
C6—C5—H5 | 119.3 | H14B—C14—H14C | 109.5 |
C5—C6—C1 | 117.49 (13) | C6—C15—H15A | 109.5 |
C5—C6—C15 | 120.57 (13) | C6—C15—H15B | 109.5 |
C1—C6—C15 | 121.93 (12) | H15A—C15—H15B | 109.5 |
O1—C7—N1 | 123.09 (13) | C6—C15—H15C | 109.5 |
O1—C7—C8 | 121.79 (12) | H15A—C15—H15C | 109.5 |
N1—C7—C8 | 115.08 (12) | H15B—C15—H15C | 109.5 |
C13—C8—C9 | 120.04 (13) | C9—C16—H16A | 109.5 |
C13—C8—C7 | 118.69 (12) | C9—C16—H16B | 109.5 |
C9—C8—C7 | 121.19 (12) | H16A—C16—H16B | 109.5 |
C10—C9—C8 | 117.28 (14) | C9—C16—H16C | 109.5 |
C10—C9—C16 | 120.15 (13) | H16A—C16—H16C | 109.5 |
C8—C9—C16 | 122.57 (13) | H16B—C16—H16C | 109.5 |
C11—C10—C9 | 122.62 (14) | C7—N1—C1 | 122.80 (12) |
C11—C10—H10 | 118.7 | C7—N1—H1N | 118.9 (10) |
C9—C10—H10 | 118.7 | C1—N1—H1N | 117.7 (10) |
C6—C1—C2—C3 | 3.1 (2) | N1—C7—C8—C9 | −132.73 (14) |
N1—C1—C2—C3 | −178.62 (12) | C13—C8—C9—C10 | −1.3 (2) |
C6—C1—C2—C14 | −175.18 (12) | C7—C8—C9—C10 | −178.09 (12) |
N1—C1—C2—C14 | 3.1 (2) | C13—C8—C9—C16 | 178.58 (14) |
C1—C2—C3—C4 | −1.8 (2) | C7—C8—C9—C16 | 1.8 (2) |
C14—C2—C3—C4 | 176.51 (13) | C8—C9—C10—C11 | 2.0 (2) |
C2—C3—C4—C5 | −0.6 (2) | C16—C9—C10—C11 | −177.92 (14) |
C3—C4—C5—C6 | 1.8 (2) | C9—C10—C11—C12 | −0.7 (2) |
C4—C5—C6—C1 | −0.5 (2) | C10—C11—C12—C13 | −1.3 (2) |
C4—C5—C6—C15 | −179.17 (13) | C11—C12—C13—C8 | 1.9 (2) |
C2—C1—C6—C5 | −2.0 (2) | C9—C8—C13—C12 | −0.6 (2) |
N1—C1—C6—C5 | 179.75 (12) | C7—C8—C13—C12 | 176.27 (13) |
C2—C1—C6—C15 | 176.66 (13) | O1—C7—N1—C1 | 7.7 (2) |
N1—C1—C6—C15 | −1.6 (2) | C8—C7—N1—C1 | −169.99 (11) |
O1—C7—C8—C13 | −127.30 (14) | C2—C1—N1—C7 | 112.35 (15) |
N1—C7—C8—C13 | 50.44 (17) | C6—C1—N1—C7 | −69.34 (18) |
O1—C7—C8—C9 | 49.54 (19) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1N···O1i | 0.917 (17) | 2.012 (17) | 2.9248 (15) | 173.7 (14) |
C15—H15A···O1 | 0.98 | 2.53 | 3.1170 (17) | 118 |
Symmetry code: (i) −x+3/2, y−1/2, z. |
Experimental details
Crystal data | |
Chemical formula | C16H17NO |
Mr | 239.31 |
Crystal system, space group | Orthorhombic, Pbca |
Temperature (K) | 100 |
a, b, c (Å) | 11.687 (1), 10.0187 (8), 22.108 (2) |
V (Å3) | 2588.6 (4) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.08 |
Crystal size (mm) | 0.36 × 0.24 × 0.04 |
Data collection | |
Diffractometer | Oxford Xcalibur diffractometer with Sapphire CCD detector |
Absorption correction | Multi-scan (CrysAlis RED; Oxford Diffraction, 2007) |
Tmin, Tmax | 0.971, 0.999 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 10773, 2624, 1864 |
Rint | 0.024 |
(sin θ/λ)max (Å−1) | 0.625 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.037, 0.127, 1.00 |
No. of reflections | 2624 |
No. of parameters | 169 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.27, −0.21 |
Computer programs: CrysAlis CCD (Oxford Diffraction, 2004), CrysAlis RED (Oxford Diffraction, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008) and JANA2000 (Petříček et al., 2000), PLATON (Spek, 2003).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1N···O1i | 0.917 (17) | 2.012 (17) | 2.9248 (15) | 173.7 (14) |
C15—H15A···O1 | 0.98 | 2.53 | 3.1170 (17) | 118 |
Symmetry code: (i) −x+3/2, y−1/2, z. |
Acknowledgements
BTG thanks the Alexander von Humboldt Foundation, Bonn, Germany, for extensions of his research fellowship.
References
Gowda, B. T., Foro, S., Sowmya, B. P. & Fuess, H. (2008). Acta Cryst. E64, o383. Web of Science CSD CrossRef IUCr Journals Google Scholar
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Oxford Diffraction (2007). CrysAlis RED. Oxford Diffraction Ltd., Köln, Germany. Google Scholar
Petříček, V., Dušek, M. & Palatinus, L. (2000). JANA2000. Institute of Physics, Czech Academy of Sciences, Prague, Czech Republic. Google Scholar
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In the present work, the structure of 2-methyl-N-(2,6-dimethylphenyl)-benzamide (N26DMP2MBA) has been determined in order to explore the effect of the substituents on the structures of benzanilides (Gowda et al., 2003; Gowda, Foro et al., 2008; Gowda, Tokarčík et al., 2008). In the structure of the title compound (N26DMP2MBA) (Fig. 1), the N—H and C═O groups are in antiperiplanar conformation. This conformation is similar to the conformations in the already determined structures, e.g. in 2-methyl-N-(phenyl)-benzamide (NP2MBA) (Gowda, Foro et al., 2008); in 2-methyl-N-(2-methylphenyl)-benzamide (N2MP2MBA) and in N-(2,6-dimethylphenyl)-benzamide (N26DMPBA) (Gowda, Tokarčík et al., 2008). Further, in the title compound N26DMP2MBA, the conformation of the C═O group to the methyl substituent in the 2-methylphenyl ring is syn. This conformation is similar to those observed in NP2MBA and N2MP2MBA. The bond distances and angles in N26DMP2MBA are similar to those in NP2MBA, N2MP2MBA, N26DMPBA and other benzanilides (Gowda et al., 2003; Gowda, Foro et al., 2008; Gowda, Tokarčík et al., 2008). The amide group makes the dihedral angles equal to 50.3 (3)° and 64.6 (3)° with the 2-methylphenyl and 2,6-dimethylphenyl rings, respectively, while the angle between the planes of both rings is 14.26 (7)°. In the crystal structure, the molecules are linked into chains via intermolecular N—H···O hydrogen bonds (Table 1). These chains are parallel to the a axis (Fig. 2).