organic compounds
N-(3-Chloro-4-fluorophenyl)-2,2-diphenylacetamide
aDepartment of Studies in Chemistry, University of Mysore, Manasagangotri, Mysore 570 006, India, bDepartment of Chemistry, Keene State College, 229 Main Street, Keene, NH 03435-2001, USA, and cDepartment of Studies in Chemistry, Mangalore University, Mangalagangotri 574 199, India
*Correspondence e-mail: jjasinski@keene.edu
In the title compound, C20H15ClFNO, the dihedral angles between the mean planes of the acetamide group and the chlorofluoro-substituted benzene ring and the two phenyl rings are 10.8 (8), 81.9 (7) and 85.8 (5)°, respectively. The crystal packing is stabilized by N—H⋯O hydrogen bonds and weak C—H⋯O intermolecular interactions, forming infinite chains along the c axis.
Related literature
For the structural similarity of N-substituted 2-arylacetamides to the lateral chain of natural benzylpenicillin, see: Mijin & Marinkovic (2006); Mijin et al. (2008). For their coordination abilities, see: Wu et al. (2008, 2010). For related structures, see: Davis & Healy (2010); Li et al. (2010); Li & Wu (2010); Wang et al. (2010); Xiao et al. (2010).
Experimental
Crystal data
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Data collection: CrysAlis PRO (Oxford Diffraction, 2010); cell CrysAlis PRO; data reduction: CrysAlis RED (Oxford Diffraction, 2010); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supporting information
https://doi.org/10.1107/S1600536811036075/ya2145sup1.cif
contains datablock I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536811036075/ya2145Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536811036075/ya2145Isup3.cml
Diphenylacetyl chloride (0.230 g, 1 mmol) and 3-chloro-4-fluoroaniline (0.145 g, 1 mmol) were dissolved in dichloromethane (20 mL). The mixture was stirred in the presence of triethylamine at 273 K for about 3 h (Fig. 1). The contents were poured into 100 ml of ice-cold aqueous hydrochloric acid with stirring, which was extracted three times with dichloromethane. The organic layer was washed with saturated NaHCO3 and brine solutions, dried and concentrated under reduced pressure to give the title compound. Single crystals were grown from toluene by the slow evaporation method (M.P.: 427 K).
The N–H atom bonded to N1 was located in the diference Fourier map and refined isotropically with N-H distance constrained to 0.86 (2) Å. All C-bound H atoms were placed in their calculated positions and included in the
in the riding model approximation with C–H lengths of 0.95 Å for aromatic and 1.00 Å for methyne H atoms and temperature factors set to 1.2 times Ueq of the parent atom. 1668 Friedel pairs were measured.Amides are extensively used as ligands due to their excellent coordination abilities (Wu et al., 2008; 2010). N-Substituted 2-arylacetamides are especially remarkable due to their structural similarity to the lateral chain of natural benzylpenicillin (Mijin & Marinkovic, 2006; Mijin et al., 2008). Crystal structures of some acetamide derivatives, viz., 2-(4-bromophenyl)-N-(2-methoxyphenyl)acetamide (Xiao et al., 2010), N-benzyl-2-(3-chloro-4-hydroxyphenyl)acetamide (Davis & Healy, 2010), 2-(2,2-dimethyl-2,3-dihydro-1-benzofuran-7-yloxy)-N- (o-tolyl)acetamide (Li et al., 2010), N-benzyl-2-(2-bromophenyl)-2- (2-nitrophenoxy)acetamide (Li & Wu, 2010) and N-(4-chlorophenyl)-2-(8-quinolyloxy)acetamide monohydrate (Wang et al., 2010) have been reported. In view of the importance of
we report herein the of the title compound, C20H15ClFNO.In the title compound, the dihedral angles between the mean planes of the acetamide group 01/N1/C6/C7/C8 and the chloro, fluoro substituted benzene ring C1-C6 and two phenyl rings C9-C14 and C15-C20 are 10.8 (8)°, 81.9 (7)° and 85.8 (5)°, respectively (Fig. 2). Crystal packing is stabilized by N1—H1N···O1i hydrogen bonds and weak C1—H1A···O1i (symmetry code i: x, 1-y, z+1/2) intermolecular interactions forming infinite one-dimensional chains along the c axis (Fig. 3, Table 1).
For the structural similarity of N-substituted 2-arylacetamides to the lateral chain of natural benzylpenicillin, see: Mijin & Marinkovic (2006); Mijin et al. (2008). For their coordination abilities, see: Wu et al. (2008, 2010). For related structures, see: Davis & Healy (2010); Li et al. (2010); Li & Wu (2010); Wang et al. (2010); Xiao et al. (2010).
Data collection: CrysAlis PRO (Oxford Diffraction, 2010); cell
CrysAlis PRO (Oxford Diffraction, 2010); data reduction: CrysAlis RED (Oxford Diffraction, 2010); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).C20H15ClFNO | F(000) = 352 |
Mr = 339.78 | Dx = 1.326 Mg m−3 |
Monoclinic, Pc | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P -2yc | Cell parameters from 3667 reflections |
a = 9.3665 (17) Å | θ = 3.0–32.4° |
b = 10.2069 (12) Å | µ = 0.24 mm−1 |
c = 9.7774 (16) Å | T = 173 K |
β = 114.42 (2)° | Block, colorless |
V = 851.1 (2) Å3 | 0.35 × 0.12 × 0.12 mm |
Z = 2 |
Oxford Diffractio Xcalibur Eos Gemini diffractometer | 3794 independent reflections |
Radiation source: Enhance (Mo) X-ray Source | 3265 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.031 |
Detector resolution: 16.1500 pixels mm-1 | θmax = 28.3°, θmin = 3.0° |
ω scans | h = −12→12 |
Absorption correction: multi-scan (CrysAlis RED; Oxford Diffraction, 2010) | k = −13→13 |
Tmin = 0.921, Tmax = 0.972 | l = −12→13 |
7456 measured reflections |
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)] = 0.042 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.109 | w = 1/[σ2(Fo2) + (0.0597P)2] where P = (Fo2 + 2Fc2)/3 |
S = 1.01 | (Δ/σ)max < 0.001 |
3794 reflections | Δρmax = 0.17 e Å−3 |
220 parameters | Δρmin = −0.17 e Å−3 |
3 restraints | Absolute structure: Flack (1983), 1668 Friedel pairs |
Primary atom site location: structure-invariant direct methods | Absolute structure parameter: −0.06 (6) |
C20H15ClFNO | V = 851.1 (2) Å3 |
Mr = 339.78 | Z = 2 |
Monoclinic, Pc | Mo Kα radiation |
a = 9.3665 (17) Å | µ = 0.24 mm−1 |
b = 10.2069 (12) Å | T = 173 K |
c = 9.7774 (16) Å | 0.35 × 0.12 × 0.12 mm |
β = 114.42 (2)° |
Oxford Diffractio Xcalibur Eos Gemini diffractometer | 3794 independent reflections |
Absorption correction: multi-scan (CrysAlis RED; Oxford Diffraction, 2010) | 3265 reflections with I > 2σ(I) |
Tmin = 0.921, Tmax = 0.972 | Rint = 0.031 |
7456 measured reflections |
R[F2 > 2σ(F2)] = 0.042 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.109 | Δρmax = 0.17 e Å−3 |
S = 1.01 | Δρmin = −0.17 e Å−3 |
3794 reflections | Absolute structure: Flack (1983), 1668 Friedel pairs |
220 parameters | Absolute structure parameter: −0.06 (6) |
3 restraints |
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 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 | 0.25355 (8) | 0.11734 (7) | 0.82272 (8) | 0.0727 (2) | |
F1 | 0.15076 (18) | 0.07394 (14) | 0.50254 (19) | 0.0658 (4) | |
O1 | 0.6516 (2) | 0.52072 (16) | 0.54006 (16) | 0.0550 (4) | |
N1 | 0.6367 (2) | 0.42807 (16) | 0.74325 (18) | 0.0431 (4) | |
H1N | 0.665 (3) | 0.433 (2) | 0.837 (2) | 0.052* | |
C1 | 0.4496 (3) | 0.28097 (19) | 0.7678 (2) | 0.0446 (4) | |
H1A | 0.4915 | 0.3022 | 0.8716 | 0.053* | |
C2 | 0.3294 (3) | 0.19290 (18) | 0.7097 (3) | 0.0454 (5) | |
C3 | 0.2684 (2) | 0.16238 (19) | 0.5588 (3) | 0.0461 (5) | |
C4 | 0.3265 (3) | 0.2195 (2) | 0.4665 (3) | 0.0543 (5) | |
H4A | 0.2836 | 0.1976 | 0.3628 | 0.065* | |
C5 | 0.4470 (3) | 0.3086 (2) | 0.5227 (2) | 0.0506 (5) | |
H5A | 0.4865 | 0.3489 | 0.4579 | 0.061* | |
C6 | 0.5107 (2) | 0.33973 (18) | 0.6746 (2) | 0.0387 (4) | |
C7 | 0.6985 (2) | 0.51195 (18) | 0.6763 (2) | 0.0390 (4) | |
C8 | 0.8312 (2) | 0.59755 (18) | 0.7841 (2) | 0.0393 (4) | |
H8A | 0.8897 | 0.5446 | 0.8765 | 0.047* | |
C9 | 0.7663 (3) | 0.71731 (18) | 0.8311 (2) | 0.0433 (4) | |
C10 | 0.8448 (3) | 0.7672 (2) | 0.9741 (3) | 0.0582 (6) | |
H10A | 0.9365 | 0.7245 | 1.0431 | 0.070* | |
C11 | 0.7909 (4) | 0.8791 (3) | 1.0177 (4) | 0.0751 (8) | |
H11A | 0.8460 | 0.9124 | 1.1165 | 0.090* | |
C12 | 0.6600 (4) | 0.9418 (3) | 0.9208 (4) | 0.0796 (9) | |
H12A | 0.6245 | 1.0189 | 0.9515 | 0.096* | |
C13 | 0.5799 (4) | 0.8935 (3) | 0.7795 (4) | 0.0767 (8) | |
H13A | 0.4882 | 0.9370 | 0.7117 | 0.092* | |
C14 | 0.6317 (3) | 0.7811 (3) | 0.7341 (3) | 0.0628 (6) | |
H14A | 0.5745 | 0.7476 | 0.6357 | 0.075* | |
C15 | 0.9445 (2) | 0.62793 (18) | 0.7125 (2) | 0.0416 (4) | |
C16 | 1.0589 (3) | 0.5378 (2) | 0.7245 (3) | 0.0532 (5) | |
H16A | 1.0688 | 0.4600 | 0.7810 | 0.064* | |
C17 | 1.1594 (3) | 0.5589 (3) | 0.6554 (3) | 0.0649 (6) | |
H17A | 1.2372 | 0.4956 | 0.6645 | 0.078* | |
C18 | 1.1470 (3) | 0.6703 (3) | 0.5742 (3) | 0.0662 (7) | |
H18A | 1.2167 | 0.6854 | 0.5277 | 0.079* | |
C19 | 1.0328 (3) | 0.7606 (3) | 0.5601 (3) | 0.0662 (7) | |
H19A | 1.0229 | 0.8377 | 0.5024 | 0.079* | |
C20 | 0.9324 (3) | 0.7403 (2) | 0.6290 (3) | 0.0570 (6) | |
H20A | 0.8545 | 0.8038 | 0.6191 | 0.068* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cl1 | 0.0985 (5) | 0.0717 (4) | 0.0713 (4) | −0.0219 (4) | 0.0586 (4) | −0.0035 (3) |
F1 | 0.0645 (8) | 0.0659 (8) | 0.0738 (10) | −0.0204 (7) | 0.0356 (7) | −0.0198 (7) |
O1 | 0.0727 (10) | 0.0649 (9) | 0.0269 (7) | −0.0149 (8) | 0.0200 (7) | 0.0038 (6) |
N1 | 0.0602 (10) | 0.0470 (8) | 0.0244 (7) | −0.0089 (8) | 0.0197 (8) | −0.0019 (7) |
C1 | 0.0650 (12) | 0.0413 (9) | 0.0328 (10) | −0.0007 (9) | 0.0257 (9) | 0.0003 (7) |
C2 | 0.0594 (12) | 0.0392 (9) | 0.0494 (12) | 0.0018 (9) | 0.0342 (10) | 0.0011 (8) |
C3 | 0.0482 (11) | 0.0405 (9) | 0.0520 (13) | −0.0027 (8) | 0.0232 (10) | −0.0059 (9) |
C4 | 0.0603 (13) | 0.0646 (13) | 0.0345 (10) | −0.0093 (10) | 0.0161 (10) | −0.0079 (9) |
C5 | 0.0651 (13) | 0.0580 (11) | 0.0328 (10) | −0.0110 (10) | 0.0242 (10) | −0.0025 (9) |
C6 | 0.0514 (10) | 0.0391 (8) | 0.0298 (9) | 0.0015 (8) | 0.0208 (8) | 0.0004 (7) |
C7 | 0.0512 (10) | 0.0387 (9) | 0.0299 (9) | 0.0038 (7) | 0.0196 (8) | 0.0012 (7) |
C8 | 0.0477 (10) | 0.0413 (9) | 0.0305 (9) | 0.0021 (8) | 0.0177 (8) | 0.0030 (7) |
C9 | 0.0516 (10) | 0.0440 (9) | 0.0401 (10) | −0.0048 (9) | 0.0248 (9) | −0.0031 (8) |
C10 | 0.0589 (14) | 0.0617 (13) | 0.0506 (13) | −0.0039 (11) | 0.0193 (11) | −0.0142 (11) |
C11 | 0.0766 (17) | 0.0792 (17) | 0.0691 (19) | −0.0120 (15) | 0.0299 (15) | −0.0369 (14) |
C12 | 0.088 (2) | 0.0621 (14) | 0.101 (3) | 0.0039 (15) | 0.0507 (19) | −0.0263 (16) |
C13 | 0.0832 (18) | 0.0728 (17) | 0.076 (2) | 0.0251 (15) | 0.0355 (16) | −0.0065 (15) |
C14 | 0.0691 (15) | 0.0664 (13) | 0.0487 (13) | 0.0169 (12) | 0.0202 (12) | −0.0032 (11) |
C15 | 0.0491 (10) | 0.0435 (10) | 0.0333 (10) | −0.0019 (8) | 0.0181 (8) | 0.0004 (7) |
C16 | 0.0645 (13) | 0.0484 (11) | 0.0518 (13) | 0.0084 (10) | 0.0293 (11) | 0.0037 (9) |
C17 | 0.0640 (14) | 0.0715 (15) | 0.0666 (17) | 0.0085 (12) | 0.0344 (13) | −0.0051 (13) |
C18 | 0.0688 (15) | 0.0879 (18) | 0.0563 (16) | −0.0157 (14) | 0.0403 (14) | −0.0130 (13) |
C19 | 0.0809 (17) | 0.0669 (14) | 0.0597 (16) | −0.0054 (13) | 0.0381 (14) | 0.0155 (12) |
C20 | 0.0653 (14) | 0.0548 (12) | 0.0586 (15) | 0.0061 (11) | 0.0332 (12) | 0.0135 (10) |
Cl1—C2 | 1.723 (2) | C10—C11 | 1.385 (4) |
F1—C3 | 1.353 (3) | C10—H10A | 0.9500 |
O1—C7 | 1.221 (2) | C11—C12 | 1.360 (5) |
N1—C7 | 1.346 (3) | C11—H11A | 0.9500 |
N1—C6 | 1.414 (3) | C12—C13 | 1.363 (5) |
N1—H1N | 0.847 (17) | C12—H12A | 0.9500 |
C1—C2 | 1.367 (3) | C13—C14 | 1.388 (4) |
C1—C6 | 1.396 (3) | C13—H13A | 0.9500 |
C1—H1A | 0.9500 | C14—H14A | 0.9500 |
C2—C3 | 1.379 (3) | C15—C16 | 1.380 (3) |
C3—C4 | 1.363 (3) | C15—C20 | 1.385 (3) |
C4—C5 | 1.374 (3) | C16—C17 | 1.384 (4) |
C4—H4A | 0.9500 | C16—H16A | 0.9500 |
C5—C6 | 1.389 (3) | C17—C18 | 1.364 (4) |
C5—H5A | 0.9500 | C17—H17A | 0.9500 |
C7—C8 | 1.528 (3) | C18—C19 | 1.375 (4) |
C8—C9 | 1.519 (3) | C18—H18A | 0.9500 |
C8—C15 | 1.526 (3) | C19—C20 | 1.380 (4) |
C8—H8A | 1.0000 | C19—H19A | 0.9500 |
C9—C10 | 1.380 (3) | C20—H20A | 0.9500 |
C9—C14 | 1.387 (3) | ||
C7—N1—C6 | 128.12 (17) | C9—C10—C11 | 120.4 (3) |
C7—N1—H1N | 118.9 (18) | C9—C10—H10A | 119.8 |
C6—N1—H1N | 112.4 (18) | C11—C10—H10A | 119.8 |
C2—C1—C6 | 120.06 (19) | C12—C11—C10 | 120.8 (3) |
C2—C1—H1A | 120.0 | C12—C11—H11A | 119.6 |
C6—C1—H1A | 120.0 | C10—C11—H11A | 119.6 |
C1—C2—C3 | 119.92 (19) | C11—C12—C13 | 119.7 (3) |
C1—C2—Cl1 | 120.96 (17) | C11—C12—H12A | 120.1 |
C3—C2—Cl1 | 119.12 (17) | C13—C12—H12A | 120.1 |
F1—C3—C4 | 119.8 (2) | C12—C13—C14 | 120.3 (3) |
F1—C3—C2 | 119.5 (2) | C12—C13—H13A | 119.9 |
C4—C3—C2 | 120.61 (19) | C14—C13—H13A | 119.9 |
C3—C4—C5 | 120.3 (2) | C9—C14—C13 | 120.6 (3) |
C3—C4—H4A | 119.8 | C9—C14—H14A | 119.7 |
C5—C4—H4A | 119.8 | C13—C14—H14A | 119.7 |
C4—C5—C6 | 119.8 (2) | C16—C15—C20 | 118.3 (2) |
C4—C5—H5A | 120.1 | C16—C15—C8 | 119.25 (18) |
C6—C5—H5A | 120.1 | C20—C15—C8 | 122.37 (19) |
C5—C6—C1 | 119.23 (19) | C15—C16—C17 | 121.1 (2) |
C5—C6—N1 | 123.94 (18) | C15—C16—H16A | 119.5 |
C1—C6—N1 | 116.83 (17) | C17—C16—H16A | 119.5 |
O1—C7—N1 | 122.95 (18) | C18—C17—C16 | 120.2 (2) |
O1—C7—C8 | 122.26 (17) | C18—C17—H17A | 119.9 |
N1—C7—C8 | 114.79 (17) | C16—C17—H17A | 119.9 |
C9—C8—C15 | 114.64 (16) | C17—C18—C19 | 119.5 (3) |
C9—C8—C7 | 110.86 (16) | C17—C18—H18A | 120.2 |
C15—C8—C7 | 108.75 (16) | C19—C18—H18A | 120.2 |
C9—C8—H8A | 107.4 | C18—C19—C20 | 120.6 (2) |
C15—C8—H8A | 107.4 | C18—C19—H19A | 119.7 |
C7—C8—H8A | 107.4 | C20—C19—H19A | 119.7 |
C10—C9—C14 | 118.2 (2) | C19—C20—C15 | 120.4 (2) |
C10—C9—C8 | 119.4 (2) | C19—C20—H20A | 119.8 |
C14—C9—C8 | 122.4 (2) | C15—C20—H20A | 119.8 |
C6—C1—C2—C3 | −0.1 (3) | C15—C8—C9—C14 | 88.2 (3) |
C6—C1—C2—Cl1 | 179.12 (15) | C7—C8—C9—C14 | −35.4 (3) |
C1—C2—C3—F1 | 179.20 (19) | C14—C9—C10—C11 | −0.9 (4) |
Cl1—C2—C3—F1 | −0.1 (3) | C8—C9—C10—C11 | 177.7 (3) |
C1—C2—C3—C4 | −0.2 (3) | C9—C10—C11—C12 | 0.0 (5) |
Cl1—C2—C3—C4 | −179.44 (18) | C10—C11—C12—C13 | 0.6 (5) |
F1—C3—C4—C5 | −179.4 (2) | C11—C12—C13—C14 | −0.2 (6) |
C2—C3—C4—C5 | −0.1 (3) | C10—C9—C14—C13 | 1.2 (4) |
C3—C4—C5—C6 | 0.6 (4) | C8—C9—C14—C13 | −177.3 (3) |
C4—C5—C6—C1 | −0.9 (3) | C12—C13—C14—C9 | −0.7 (5) |
C4—C5—C6—N1 | 178.7 (2) | C9—C8—C15—C16 | 152.1 (2) |
C2—C1—C6—C5 | 0.7 (3) | C7—C8—C15—C16 | −83.2 (2) |
C2—C1—C6—N1 | −178.94 (18) | C9—C8—C15—C20 | −31.1 (3) |
C7—N1—C6—C5 | 12.1 (3) | C7—C8—C15—C20 | 93.6 (2) |
C7—N1—C6—C1 | −168.3 (2) | C20—C15—C16—C17 | 0.2 (3) |
C6—N1—C7—O1 | −1.1 (3) | C8—C15—C16—C17 | 177.0 (2) |
C6—N1—C7—C8 | 177.97 (18) | C15—C16—C17—C18 | 0.2 (4) |
O1—C7—C8—C9 | 95.3 (2) | C16—C17—C18—C19 | −0.8 (4) |
N1—C7—C8—C9 | −83.8 (2) | C17—C18—C19—C20 | 0.9 (4) |
O1—C7—C8—C15 | −31.6 (2) | C18—C19—C20—C15 | −0.5 (4) |
N1—C7—C8—C15 | 149.28 (17) | C16—C15—C20—C19 | 0.0 (4) |
C15—C8—C9—C10 | −90.3 (3) | C8—C15—C20—C19 | −176.8 (2) |
C7—C8—C9—C10 | 146.1 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
C1—H1A···O1i | 0.95 | 2.49 | 3.256 (3) | 138 |
N1—H1N···O1i | 0.85 (2) | 2.09 (2) | 2.895 (2) | 158 (2) |
Symmetry code: (i) x, −y+1, z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C20H15ClFNO |
Mr | 339.78 |
Crystal system, space group | Monoclinic, Pc |
Temperature (K) | 173 |
a, b, c (Å) | 9.3665 (17), 10.2069 (12), 9.7774 (16) |
β (°) | 114.42 (2) |
V (Å3) | 851.1 (2) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.24 |
Crystal size (mm) | 0.35 × 0.12 × 0.12 |
Data collection | |
Diffractometer | Oxford Diffractio Xcalibur Eos Gemini |
Absorption correction | Multi-scan (CrysAlis RED; Oxford Diffraction, 2010) |
Tmin, Tmax | 0.921, 0.972 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 7456, 3794, 3265 |
Rint | 0.031 |
(sin θ/λ)max (Å−1) | 0.667 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.042, 0.109, 1.01 |
No. of reflections | 3794 |
No. of parameters | 220 |
No. of restraints | 3 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.17, −0.17 |
Absolute structure | Flack (1983), 1668 Friedel pairs |
Absolute structure parameter | −0.06 (6) |
Computer programs: CrysAlis PRO (Oxford Diffraction, 2010), CrysAlis RED (Oxford Diffraction, 2010), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
C1—H1A···O1i | 0.95 | 2.49 | 3.256 (3) | 138.0 |
N1—H1N···O1i | 0.847 (17) | 2.092 (19) | 2.895 (2) | 158 (2) |
Symmetry code: (i) x, −y+1, z+1/2. |
Acknowledgements
ASP thanks the UOM for research facilities. JPJ acknowledges the NSF–MRI program (grant No. CHE1039027) for funds to purchase the X-ray diffractometer.
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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.
Amides are extensively used as ligands due to their excellent coordination abilities (Wu et al., 2008; 2010). N-Substituted 2-arylacetamides are especially remarkable due to their structural similarity to the lateral chain of natural benzylpenicillin (Mijin & Marinkovic, 2006; Mijin et al., 2008). Crystal structures of some acetamide derivatives, viz., 2-(4-bromophenyl)-N-(2-methoxyphenyl)acetamide (Xiao et al., 2010), N-benzyl-2-(3-chloro-4-hydroxyphenyl)acetamide (Davis & Healy, 2010), 2-(2,2-dimethyl-2,3-dihydro-1-benzofuran-7-yloxy)-N- (o-tolyl)acetamide (Li et al., 2010), N-benzyl-2-(2-bromophenyl)-2- (2-nitrophenoxy)acetamide (Li & Wu, 2010) and N-(4-chlorophenyl)-2-(8-quinolyloxy)acetamide monohydrate (Wang et al., 2010) have been reported. In view of the importance of amides, we report herein the crystal structure of the title compound, C20H15ClFNO.
In the title compound, the dihedral angles between the mean planes of the acetamide group 01/N1/C6/C7/C8 and the chloro, fluoro substituted benzene ring C1-C6 and two phenyl rings C9-C14 and C15-C20 are 10.8 (8)°, 81.9 (7)° and 85.8 (5)°, respectively (Fig. 2). Crystal packing is stabilized by N1—H1N···O1i hydrogen bonds and weak C1—H1A···O1i (symmetry code i: x, 1-y, z+1/2) intermolecular interactions forming infinite one-dimensional chains along the c axis (Fig. 3, Table 1).