organic compounds
2-Chloro-N-(3,4-dimethylphenyl)acetamide
aDepartment of Chemistry, Mangalore University, Mangalagangotri 574 199, Mangalore, India, bInstitute of Materials Science, Darmstadt University of Technology, Petersenstrasse 23, D-64287 Darmstadt, Germany, and cFaculty of Integrated Arts and Sciences, Tokushima University, Minamijosanjima-cho, Tokushima 770-8502, Japan
*Correspondence e-mail: gowdabt@yahoo.com
The conformation of the C=O bond in the structure of the title compound, C10H12ClNO, is anti to the N—H bond and to the methylene H atoms in the side chain in both the independent molecules comprising the However, the conformation of the N—H bond is syn to the meta-methyl substituent in the aromatic ring of one of the molecules and anti in the other molecule. The two independent molecules are linked through intermolecular N—H⋯O hydrogen bonding into chains parallel to the b axis.
Related literature
For preparation of the compound, see: Shilpa & Gowda (2007). For related structures, see: Gowda et al. (2008a,b,c).
Experimental
Crystal data
|
Refinement
|
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); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97.
Supporting information
10.1107/S1600536809013051/dn2441sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536809013051/dn2441Isup2.hkl
Compound (I) was prepared according to the literature method (Shilpa & Gowda, 2007). Single crystals were obtained from the slow evaporation of an ethanolic solution of (I).
The H atoms were positioned with idealized geometry using a riding model with C—H = 0.93–0.97 Å, N—H = 0.86 Å, and were refined with isotropic displacement parameters (set to 1.2 times of the Ueq of the parent atom).
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); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).C10H12ClNO | Z = 4 |
Mr = 197.66 | F(000) = 416 |
Triclinic, P1 | Dx = 1.318 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 8.3672 (9) Å | Cell parameters from 4345 reflections |
b = 9.8076 (9) Å | θ = 2.8–27.6° |
c = 12.409 (1) Å | µ = 0.34 mm−1 |
α = 95.415 (8)° | T = 299 K |
β = 96.492 (9)° | Rod, colourless |
γ = 97.767 (9)° | 0.44 × 0.36 × 0.20 mm |
V = 996.26 (16) Å3 |
Oxford Diffraction Xcalibur diffractometer with a Sapphire CCD detector | 3634 independent reflections |
Radiation source: fine-focus sealed tube | 2874 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.017 |
Rotation method data acquisition using ω and ϕ scans | θmax = 25.4°, θmin = 2.8° |
Absorption correction: multi-scan (CrysAlis RED; Oxford Diffraction, 2007) | h = −10→10 |
Tmin = 0.868, Tmax = 0.936 | k = −11→11 |
10754 measured reflections | l = −14→14 |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.035 | H-atom parameters constrained |
wR(F2) = 0.127 | w = 1/[σ2(Fo2) + (0.1P)2] where P = (Fo2 + 2Fc2)/3 |
S = 0.97 | (Δ/σ)max < 0.001 |
3634 reflections | Δρmax = 0.19 e Å−3 |
240 parameters | Δρmin = −0.23 e Å−3 |
0 restraints | Extinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.024 (4) |
C10H12ClNO | γ = 97.767 (9)° |
Mr = 197.66 | V = 996.26 (16) Å3 |
Triclinic, P1 | Z = 4 |
a = 8.3672 (9) Å | Mo Kα radiation |
b = 9.8076 (9) Å | µ = 0.34 mm−1 |
c = 12.409 (1) Å | T = 299 K |
α = 95.415 (8)° | 0.44 × 0.36 × 0.20 mm |
β = 96.492 (9)° |
Oxford Diffraction Xcalibur diffractometer with a Sapphire CCD detector | 3634 independent reflections |
Absorption correction: multi-scan (CrysAlis RED; Oxford Diffraction, 2007) | 2874 reflections with I > 2σ(I) |
Tmin = 0.868, Tmax = 0.936 | Rint = 0.017 |
10754 measured reflections |
R[F2 > 2σ(F2)] = 0.035 | 0 restraints |
wR(F2) = 0.127 | H-atom parameters constrained |
S = 0.97 | Δρmax = 0.19 e Å−3 |
3634 reflections | Δρmin = −0.23 e Å−3 |
240 parameters |
Experimental. Absorption correction: empirical absorption correction using spherical harmonics, implemented in SCALE3 ABSPACK scaling algorithm, CrysAlis RED (Oxford Diffraction, 2007). |
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 | ||
Cl1 | 0.62739 (6) | 0.60024 (5) | 0.62240 (4) | 0.0701 (2) | |
O1 | 0.83974 (16) | 0.76355 (11) | 0.45971 (10) | 0.0569 (3) | |
N1 | 0.81699 (17) | 0.54085 (13) | 0.38380 (11) | 0.0477 (3) | |
H1N | 0.8113 | 0.4570 | 0.3998 | 0.057* | |
C1 | 0.81633 (19) | 0.55916 (15) | 0.27115 (14) | 0.0447 (4) | |
C2 | 0.9174 (2) | 0.66380 (16) | 0.23435 (14) | 0.0482 (4) | |
H2 | 0.9875 | 0.7272 | 0.2846 | 0.058* | |
C3 | 0.9155 (2) | 0.67553 (17) | 0.12342 (14) | 0.0490 (4) | |
C4 | 0.8120 (2) | 0.57967 (18) | 0.04769 (14) | 0.0542 (4) | |
C5 | 0.7129 (2) | 0.47505 (18) | 0.08636 (16) | 0.0627 (5) | |
H5 | 0.6434 | 0.4105 | 0.0367 | 0.075* | |
C6 | 0.7148 (2) | 0.46423 (17) | 0.19551 (16) | 0.0575 (5) | |
H6 | 0.6474 | 0.3926 | 0.2190 | 0.069* | |
C7 | 0.82545 (19) | 0.63949 (16) | 0.46785 (14) | 0.0446 (4) | |
C8 | 0.8184 (2) | 0.58415 (19) | 0.57750 (14) | 0.0546 (4) | |
H8A | 0.9049 | 0.6356 | 0.6304 | 0.066* | |
H8B | 0.8339 | 0.4876 | 0.5710 | 0.066* | |
C9 | 1.0278 (3) | 0.7913 (2) | 0.08682 (19) | 0.0753 (6) | |
H9A | 1.0907 | 0.8458 | 0.1495 | 0.090* | |
H9B | 0.9646 | 0.8488 | 0.0466 | 0.090* | |
H9C | 1.0995 | 0.7528 | 0.0411 | 0.090* | |
C10 | 0.8062 (3) | 0.5877 (3) | −0.07390 (16) | 0.0781 (6) | |
H10A | 0.9126 | 0.5838 | −0.0949 | 0.094* | |
H10B | 0.7710 | 0.6731 | −0.0913 | 0.094* | |
H10C | 0.7314 | 0.5112 | −0.1126 | 0.094* | |
Cl2 | 0.90424 (8) | 0.14166 (5) | 0.21372 (4) | 0.0779 (2) | |
O2 | 0.78329 (17) | 0.24929 (11) | 0.41405 (11) | 0.0628 (4) | |
N2 | 0.74319 (15) | 0.04521 (12) | 0.48565 (10) | 0.0414 (3) | |
H2N | 0.7539 | −0.0406 | 0.4734 | 0.050* | |
C11 | 0.67313 (18) | 0.08227 (14) | 0.58097 (12) | 0.0379 (3) | |
C12 | 0.66625 (19) | −0.01217 (15) | 0.65716 (12) | 0.0428 (4) | |
H12 | 0.7076 | −0.0946 | 0.6435 | 0.051* | |
C13 | 0.5996 (2) | 0.01258 (16) | 0.75308 (13) | 0.0458 (4) | |
C14 | 0.53726 (19) | 0.13642 (16) | 0.77369 (13) | 0.0459 (4) | |
C15 | 0.5432 (2) | 0.22884 (16) | 0.69622 (14) | 0.0503 (4) | |
H15 | 0.5011 | 0.3110 | 0.7092 | 0.060* | |
C16 | 0.60886 (19) | 0.20418 (15) | 0.60076 (14) | 0.0466 (4) | |
H16 | 0.6102 | 0.2683 | 0.5501 | 0.056* | |
C17 | 0.79504 (19) | 0.12730 (15) | 0.41182 (13) | 0.0425 (4) | |
C18 | 0.8760 (2) | 0.05019 (18) | 0.32656 (13) | 0.0519 (4) | |
H18A | 0.8097 | −0.0386 | 0.3018 | 0.062* | |
H18B | 0.9808 | 0.0326 | 0.3598 | 0.062* | |
C19 | 0.5979 (3) | −0.0922 (2) | 0.83395 (16) | 0.0698 (6) | |
H19A | 0.6609 | −0.0513 | 0.9016 | 0.084* | |
H19B | 0.6439 | −0.1707 | 0.8058 | 0.084* | |
H19C | 0.4879 | −0.1216 | 0.8462 | 0.084* | |
C20 | 0.4663 (2) | 0.1688 (2) | 0.87824 (15) | 0.0639 (5) | |
H20A | 0.5468 | 0.1673 | 0.9396 | 0.077* | |
H20B | 0.3736 | 0.1008 | 0.8819 | 0.077* | |
H20C | 0.4333 | 0.2589 | 0.8797 | 0.077* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cl1 | 0.0802 (4) | 0.0660 (3) | 0.0721 (3) | 0.0167 (3) | 0.0302 (3) | 0.0161 (2) |
O1 | 0.0811 (9) | 0.0320 (6) | 0.0606 (7) | 0.0144 (5) | 0.0136 (6) | 0.0069 (5) |
N1 | 0.0598 (9) | 0.0290 (6) | 0.0568 (8) | 0.0085 (6) | 0.0128 (7) | 0.0085 (6) |
C1 | 0.0469 (9) | 0.0323 (7) | 0.0568 (9) | 0.0115 (7) | 0.0090 (7) | 0.0041 (7) |
C2 | 0.0470 (9) | 0.0380 (8) | 0.0578 (10) | 0.0046 (7) | 0.0043 (8) | 0.0017 (7) |
C3 | 0.0500 (10) | 0.0447 (9) | 0.0559 (10) | 0.0142 (7) | 0.0101 (8) | 0.0097 (7) |
C4 | 0.0570 (10) | 0.0513 (10) | 0.0570 (10) | 0.0243 (8) | 0.0029 (8) | 0.0020 (8) |
C5 | 0.0653 (12) | 0.0478 (10) | 0.0682 (12) | 0.0054 (9) | −0.0037 (10) | −0.0101 (8) |
C6 | 0.0618 (11) | 0.0374 (8) | 0.0703 (12) | 0.0011 (8) | 0.0095 (9) | −0.0023 (8) |
C7 | 0.0437 (9) | 0.0356 (8) | 0.0567 (9) | 0.0099 (7) | 0.0073 (7) | 0.0093 (7) |
C8 | 0.0596 (11) | 0.0477 (9) | 0.0584 (10) | 0.0104 (8) | 0.0066 (8) | 0.0126 (8) |
C9 | 0.0797 (14) | 0.0735 (14) | 0.0735 (13) | −0.0002 (11) | 0.0189 (11) | 0.0176 (11) |
C10 | 0.0970 (17) | 0.0832 (15) | 0.0568 (12) | 0.0346 (13) | −0.0021 (11) | 0.0040 (10) |
Cl2 | 0.1111 (5) | 0.0687 (3) | 0.0604 (3) | 0.0094 (3) | 0.0316 (3) | 0.0223 (2) |
O2 | 0.0880 (10) | 0.0318 (6) | 0.0763 (8) | 0.0136 (6) | 0.0275 (7) | 0.0190 (6) |
N2 | 0.0518 (8) | 0.0259 (6) | 0.0483 (7) | 0.0061 (5) | 0.0106 (6) | 0.0073 (5) |
C11 | 0.0379 (8) | 0.0299 (7) | 0.0447 (8) | 0.0025 (6) | 0.0036 (6) | 0.0037 (6) |
C12 | 0.0499 (9) | 0.0299 (7) | 0.0508 (9) | 0.0097 (6) | 0.0084 (7) | 0.0073 (6) |
C13 | 0.0516 (9) | 0.0404 (8) | 0.0446 (8) | 0.0056 (7) | 0.0048 (7) | 0.0046 (7) |
C14 | 0.0440 (9) | 0.0428 (8) | 0.0485 (9) | 0.0040 (7) | 0.0046 (7) | −0.0027 (7) |
C15 | 0.0528 (10) | 0.0358 (8) | 0.0636 (10) | 0.0134 (7) | 0.0093 (8) | 0.0003 (7) |
C16 | 0.0519 (9) | 0.0322 (7) | 0.0581 (10) | 0.0102 (7) | 0.0080 (8) | 0.0101 (7) |
C17 | 0.0458 (9) | 0.0334 (8) | 0.0480 (9) | 0.0021 (6) | 0.0059 (7) | 0.0091 (6) |
C18 | 0.0618 (11) | 0.0465 (9) | 0.0510 (9) | 0.0088 (8) | 0.0151 (8) | 0.0134 (7) |
C19 | 0.0980 (16) | 0.0619 (11) | 0.0592 (11) | 0.0223 (11) | 0.0262 (11) | 0.0215 (9) |
C20 | 0.0684 (12) | 0.0652 (12) | 0.0567 (11) | 0.0089 (10) | 0.0157 (9) | −0.0078 (9) |
Cl1—C8 | 1.7731 (19) | Cl2—C18 | 1.7539 (16) |
O1—C7 | 1.2213 (18) | O2—C17 | 1.2117 (18) |
N1—C7 | 1.343 (2) | N2—C17 | 1.3454 (19) |
N1—C1 | 1.426 (2) | N2—C11 | 1.4171 (19) |
N1—H1N | 0.8600 | N2—H2N | 0.8600 |
C1—C6 | 1.382 (2) | C11—C12 | 1.385 (2) |
C1—C2 | 1.385 (2) | C11—C16 | 1.388 (2) |
C2—C3 | 1.391 (2) | C12—C13 | 1.385 (2) |
C2—H2 | 0.9300 | C12—H12 | 0.9300 |
C3—C4 | 1.395 (2) | C13—C14 | 1.398 (2) |
C3—C9 | 1.511 (3) | C13—C19 | 1.503 (2) |
C4—C5 | 1.387 (3) | C14—C15 | 1.383 (2) |
C4—C10 | 1.514 (3) | C14—C20 | 1.511 (2) |
C5—C6 | 1.367 (3) | C15—C16 | 1.376 (2) |
C5—H5 | 0.9300 | C15—H15 | 0.9300 |
C6—H6 | 0.9300 | C16—H16 | 0.9300 |
C7—C8 | 1.516 (2) | C17—C18 | 1.517 (2) |
C8—H8A | 0.9700 | C18—H18A | 0.9700 |
C8—H8B | 0.9700 | C18—H18B | 0.9700 |
C9—H9A | 0.9600 | C19—H19A | 0.9600 |
C9—H9B | 0.9600 | C19—H19B | 0.9600 |
C9—H9C | 0.9600 | C19—H19C | 0.9600 |
C10—H10A | 0.9600 | C20—H20A | 0.9600 |
C10—H10B | 0.9600 | C20—H20B | 0.9600 |
C10—H10C | 0.9600 | C20—H20C | 0.9600 |
C7—N1—C1 | 127.45 (13) | C17—N2—C11 | 128.24 (12) |
C7—N1—H1N | 116.3 | C17—N2—H2N | 115.9 |
C1—N1—H1N | 116.3 | C11—N2—H2N | 115.9 |
C6—C1—C2 | 118.88 (16) | C12—C11—C16 | 118.87 (14) |
C6—C1—N1 | 118.09 (15) | C12—C11—N2 | 116.84 (13) |
C2—C1—N1 | 122.98 (14) | C16—C11—N2 | 124.27 (13) |
C1—C2—C3 | 120.99 (15) | C11—C12—C13 | 121.92 (14) |
C1—C2—H2 | 119.5 | C11—C12—H12 | 119.0 |
C3—C2—H2 | 119.5 | C13—C12—H12 | 119.0 |
C2—C3—C4 | 119.72 (16) | C12—C13—C14 | 119.13 (15) |
C2—C3—C9 | 119.26 (16) | C12—C13—C19 | 119.77 (15) |
C4—C3—C9 | 121.02 (17) | C14—C13—C19 | 121.09 (16) |
C5—C4—C3 | 118.29 (16) | C15—C14—C13 | 118.25 (15) |
C5—C4—C10 | 120.04 (17) | C15—C14—C20 | 120.87 (16) |
C3—C4—C10 | 121.68 (18) | C13—C14—C20 | 120.88 (16) |
C6—C5—C4 | 121.78 (16) | C16—C15—C14 | 122.68 (15) |
C6—C5—H5 | 119.1 | C16—C15—H15 | 118.7 |
C4—C5—H5 | 119.1 | C14—C15—H15 | 118.7 |
C5—C6—C1 | 120.34 (17) | C15—C16—C11 | 119.14 (14) |
C5—C6—H6 | 119.8 | C15—C16—H16 | 120.4 |
C1—C6—H6 | 119.8 | C11—C16—H16 | 120.4 |
O1—C7—N1 | 124.51 (15) | O2—C17—N2 | 124.59 (15) |
O1—C7—C8 | 121.48 (15) | O2—C17—C18 | 123.45 (14) |
N1—C7—C8 | 114.00 (14) | N2—C17—C18 | 111.93 (13) |
C7—C8—Cl1 | 109.74 (12) | C17—C18—Cl2 | 112.79 (12) |
C7—C8—H8A | 109.7 | C17—C18—H18A | 109.0 |
Cl1—C8—H8A | 109.7 | Cl2—C18—H18A | 109.0 |
C7—C8—H8B | 109.7 | C17—C18—H18B | 109.0 |
Cl1—C8—H8B | 109.7 | Cl2—C18—H18B | 109.0 |
H8A—C8—H8B | 108.2 | H18A—C18—H18B | 107.8 |
C3—C9—H9A | 109.5 | C13—C19—H19A | 109.5 |
C3—C9—H9B | 109.5 | C13—C19—H19B | 109.5 |
H9A—C9—H9B | 109.5 | H19A—C19—H19B | 109.5 |
C3—C9—H9C | 109.5 | C13—C19—H19C | 109.5 |
H9A—C9—H9C | 109.5 | H19A—C19—H19C | 109.5 |
H9B—C9—H9C | 109.5 | H19B—C19—H19C | 109.5 |
C4—C10—H10A | 109.5 | C14—C20—H20A | 109.5 |
C4—C10—H10B | 109.5 | C14—C20—H20B | 109.5 |
H10A—C10—H10B | 109.5 | H20A—C20—H20B | 109.5 |
C4—C10—H10C | 109.5 | C14—C20—H20C | 109.5 |
H10A—C10—H10C | 109.5 | H20A—C20—H20C | 109.5 |
H10B—C10—H10C | 109.5 | H20B—C20—H20C | 109.5 |
C7—N1—C1—C6 | −140.52 (16) | C17—N2—C11—C12 | −164.70 (14) |
C7—N1—C1—C2 | 42.3 (2) | C17—N2—C11—C16 | 16.8 (2) |
C6—C1—C2—C3 | 1.1 (2) | C16—C11—C12—C13 | −1.1 (2) |
N1—C1—C2—C3 | 178.30 (14) | N2—C11—C12—C13 | −179.64 (14) |
C1—C2—C3—C4 | −0.8 (2) | C11—C12—C13—C14 | 0.1 (2) |
C1—C2—C3—C9 | 180.00 (16) | C11—C12—C13—C19 | −178.89 (16) |
C2—C3—C4—C5 | 0.2 (2) | C12—C13—C14—C15 | 0.7 (2) |
C9—C3—C4—C5 | 179.41 (17) | C19—C13—C14—C15 | 179.67 (16) |
C2—C3—C4—C10 | −179.69 (17) | C12—C13—C14—C20 | −178.87 (15) |
C9—C3—C4—C10 | −0.5 (3) | C19—C13—C14—C20 | 0.1 (3) |
C3—C4—C5—C6 | 0.0 (3) | C13—C14—C15—C16 | −0.5 (3) |
C10—C4—C5—C6 | 179.91 (18) | C20—C14—C15—C16 | 179.05 (16) |
C4—C5—C6—C1 | 0.4 (3) | C14—C15—C16—C11 | −0.5 (3) |
C2—C1—C6—C5 | −0.9 (3) | C12—C11—C16—C15 | 1.2 (2) |
N1—C1—C6—C5 | −178.21 (16) | N2—C11—C16—C15 | 179.71 (14) |
C1—N1—C7—O1 | −2.7 (3) | C11—N2—C17—O2 | −3.0 (3) |
C1—N1—C7—C8 | 178.29 (15) | C11—N2—C17—C18 | 175.03 (14) |
O1—C7—C8—Cl1 | 73.33 (19) | O2—C17—C18—Cl2 | −15.1 (2) |
N1—C7—C8—Cl1 | −107.59 (15) | N2—C17—C18—Cl2 | 166.82 (11) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1N···O2 | 0.86 | 2.05 | 2.8992 (16) | 172 |
N2—H2N···O1i | 0.86 | 2.14 | 2.9802 (16) | 166 |
Symmetry code: (i) x, y−1, z. |
Experimental details
Crystal data | |
Chemical formula | C10H12ClNO |
Mr | 197.66 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 299 |
a, b, c (Å) | 8.3672 (9), 9.8076 (9), 12.409 (1) |
α, β, γ (°) | 95.415 (8), 96.492 (9), 97.767 (9) |
V (Å3) | 996.26 (16) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.34 |
Crystal size (mm) | 0.44 × 0.36 × 0.20 |
Data collection | |
Diffractometer | Oxford Diffraction Xcalibur diffractometer with a Sapphire CCD detector |
Absorption correction | Multi-scan (CrysAlis RED; Oxford Diffraction, 2007) |
Tmin, Tmax | 0.868, 0.936 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 10754, 3634, 2874 |
Rint | 0.017 |
(sin θ/λ)max (Å−1) | 0.602 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.035, 0.127, 0.97 |
No. of reflections | 3634 |
No. of parameters | 240 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.19, −0.23 |
Computer programs: CrysAlis CCD (Oxford Diffraction, 2004), CrysAlis RED (Oxford Diffraction, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1N···O2 | 0.86 | 2.05 | 2.8992 (16) | 171.5 |
N2—H2N···O1i | 0.86 | 2.14 | 2.9802 (16) | 166.2 |
Symmetry code: (i) x, y−1, z. |
References
Gowda, B. T., Foro, S. & Fuess, H. (2008a). Acta Cryst. E64, o85. Web of Science CSD CrossRef IUCr Journals Google Scholar
Gowda, B. T., Foro, S. & Fuess, H. (2008b). Acta Cryst. E64, o420. Web of Science CSD CrossRef IUCr Journals Google Scholar
Gowda, B. T., Svoboda, I., Foro, S., Dou, S. & Fuess, H. (2008c). Acta Cryst. E64, o208. Web of Science CSD CrossRef IUCr Journals Google Scholar
Oxford Diffraction (2004). CrysAlis CCD. Oxford Diffraction Ltd, Köln, Germany. Google Scholar
Oxford Diffraction (2007). CrysAlis RED. Oxford Diffraction Ltd, Köln, Germany. Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Shilpa & Gowda, B. T. (2007). Z. Naturforsch. Teil A, 62, 84–90. Google Scholar
Spek, A. L. (2009). Acta Cryst. D65, 148–155. Web of Science CrossRef CAS IUCr Journals Google Scholar
This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
In the present work, as part of a study of the effect of ring and side chain substitutions on the crystal structures of aromatic amides (Gowda et al., 2008a,b,c), the structure of 2-chloro-N-(3,4-dimethylphenyl)acetamide (I) has been determined. The asymmetric unit of the structure contains two molecules (Fig. 1). The conformation of the N—H bond is syn to the meta-methyl substituent in the aromatic ring of one of the molecules and anti in the other molecule. The conformation of the C=O bond in the structure is anti to the N—H bond and to the side chain methylene H-atoms in the side chain (Fig. 1), in both the independent molecules comprising the asymmetric unit, similar to that observed in in 2-chloro-N- (2,4-dimethylphenyl)acetamide (Gowda et al., 2008a), in 2-chloro-N-(3,5-dichlorophenyl)acetamide (Gowda et al., 2008b), and in 2-chloro-N-(3-methylphenyl)acetamide (Gowda et al., 2008c). The two independent molecules in (I) are linked through intermolecular N—H···O hydrogen bonding (Fig.1) and the chains formed by H-bonding are parallel to the b axis (Table 1, Fig. 2).