organic compounds
N,N′-Bis(2-chlorophenyl)propanediamide
aDepartment of Chemistry, Mangalore University, Mangalagangotri 574 199, Mangalore, India, bFaculty of Chemical and Food Technology, Slovak Technical University, Radlinského 9, SK-812 37 Bratislava, Slovak Republic, and cInstitute of Materials Science, Darmstadt University of Technology, Petersenstrasse 23, D-64287 Darmstadt, Germany
*Correspondence e-mail: gowdabt@yahoo.com
The 15H12Cl2N2O2, contains three intramolecular hydrogen bonds; two C—H⋯O and a nonclassical N—H⋯Cl. The structure is further stabilized by intermolecular N—H⋯O hydrogen bonds and C—H⋯π interactions, resulting in a three-dimensional network. The two benzene rings make an interplanar angle of 58.0 (1)°.
of the title compound, CExperimental
Crystal data
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Refinement
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Data collection: CrysAlis PRO (Oxford Diffraction, 2009); cell CrysAlis PRO; data reduction: CrysAlis PRO; 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 DIAMOND (Brandenburg, 2002); software used to prepare material for publication: SHELXL97, PLATON (Spek, 2009) and WinGX (Farrugia, 1999).
Supporting information
https://doi.org/10.1107/S1600536810044090/bt5396sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810044090/bt5396Isup2.hkl
Malonic acid (0.3 mol) in dichloromethane (30 ml) was treated with 2-chloroaniline (0.6 mol) in dichloromethane (30 ml), dropwise with stirring. The resulting mixture was stirred for 3 hrs and kept aside for 12 hrs for the completion of reaction and evaporation of the solvent, dichloromethane. The product obtained was added to crushed ice to obtain the precipitate. The latter was thoroughly washed with water and then with saturated sodium bicarbonate solution and washed again with water. It was then given a wash with 2 N HCl. It was again washed with water, filtered, dried and recrystallized to the constant melting point from ethanol.
Block like colorless single crystals of the title compound used in X-ray diffraction studies were obtained by a slow evaporation of its ehanolic solution at room temperature.
All H atoms were positioned geometrically and refined using a riding model with C–H = 0.93 or 0.97 Å and N–H = 0.86 Å. The Uiso(H) values were set at 1.2Ueq(C, N).
The amide moiety is an important constituent of many biologically significant compounds. As a part of studying the effect of substitutions on the structures of this class of compounds (Gowda et al., 2007; 2009; 2010), the
of N,N-bis(2-chlorophenyl)-malonamide has been determined (I) (Fig. 1).The molecular structure of (I) includes three intermolecular hydrogen bonds (Table 1); two of them are C–H···O hydrogen bonds, the third is a non- classical N–H···Cl hydrogen bond. The two phenyl rings make an interplanar angle of 58.0 (1)°. The dihedral angle made by the two amido groups is 65.0 (2)°. The conformation of the ortho-chlorosubstituent is anti to the nearest carbonyl C=O bond, as indicated by the torsion angles, C2—C1—N1—C7 = -156.1 (2)° and C11—C10—N2—C9 = 137.2 (2)° in the first and the second phenyl rings, respectively. The chlorine Cl atom attached to the C1/C6 phenyl ring gives rise to a non conventional N–H···Cl hydrogen bond, with N–Cl distance of 2.9730 (18) Å and angle of 109°. The second chlorine atom, attached to the C10/C15 phenyl ring, makes a short intramolecular contact of 2.960 (2)Å with the nearest amide N atom, forming the N–H···Cl angle of 98°. In the crystal, the molecules are linked by intermolecular N–H···O hydrogen bonds into the chains running along the base vector [0 1 1] parallel to the bc-plane (Fig. 2). The chains are further stabilized by C–H···π interaction between the C3 atom of the C1/C6 ring and the centroid Cg2 of the phenyl ring C10/C15 at the position (-x, y + 1/2, -z + 1/2).
For literature on related compounds, see: Gowda et al. (2007, 2009, 2010).
Data collection: CrysAlis PRO (Oxford Diffraction, 2009); cell
CrysAlis PRO (Oxford Diffraction, 2009); data reduction: CrysAlis PRO (Oxford Diffraction, 2009); 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 DIAMOND (Brandenburg, 2002); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008), PLATON (Spek, 2009) and WinGX (Farrugia, 1999).Fig. 1. Molecular structure of (I) showing the atom labelling scheme. Displacement ellipsoids are drawn at the 30% probability level. H atoms are represented as small spheres of arbitrary radii. Three intramolecular hydrogen bonds are shown as dashed lines. | |
Fig. 2. Packing diagram of (I) with hydrogen bonds indicated by dashed lines. The hydrogen atoms not participating in hydrogen bonding have been omitted. Cg2 is the centroid of the C10/C15 phenyl ring. |
C15H12Cl2N2O2 | F(000) = 664 |
Mr = 323.17 | Dx = 1.476 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 6793 reflections |
a = 13.8819 (9) Å | θ = 3.7–29.3° |
b = 15.3556 (10) Å | µ = 0.45 mm−1 |
c = 7.0316 (5) Å | T = 295 K |
β = 104.027 (7)° | Block, colorless |
V = 1454.19 (17) Å3 | 0.57 × 0.54 × 0.15 mm |
Z = 4 |
Oxford Diffraction Gemini R CCD diffractometer | 2687 independent reflections |
Graphite monochromator | 1930 reflections with I > 2σ(I) |
Detector resolution: 10.434 pixels mm-1 | Rint = 0.042 |
ω scans | θmax = 25.4°, θmin = 2.7° |
Absorption correction: analytical (CrysAlis PRO; Oxford Diffraction, 2009) | h = −15→16 |
Tmin = 0.743, Tmax = 0.938 | k = −15→18 |
13088 measured reflections | l = −8→8 |
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)] = 0.044 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.127 | H-atom parameters constrained |
S = 1.03 | w = 1/[σ2(Fo2) + (0.0805P)2] where P = (Fo2 + 2Fc2)/3 |
2687 reflections | (Δ/σ)max = 0.001 |
190 parameters | Δρmax = 0.19 e Å−3 |
0 restraints | Δρmin = −0.39 e Å−3 |
C15H12Cl2N2O2 | V = 1454.19 (17) Å3 |
Mr = 323.17 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 13.8819 (9) Å | µ = 0.45 mm−1 |
b = 15.3556 (10) Å | T = 295 K |
c = 7.0316 (5) Å | 0.57 × 0.54 × 0.15 mm |
β = 104.027 (7)° |
Oxford Diffraction Gemini R CCD diffractometer | 2687 independent reflections |
Absorption correction: analytical (CrysAlis PRO; Oxford Diffraction, 2009) | 1930 reflections with I > 2σ(I) |
Tmin = 0.743, Tmax = 0.938 | Rint = 0.042 |
13088 measured reflections |
R[F2 > 2σ(F2)] = 0.044 | 0 restraints |
wR(F2) = 0.127 | H-atom parameters constrained |
S = 1.03 | Δρmax = 0.19 e Å−3 |
2687 reflections | Δρmin = −0.39 e Å−3 |
190 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 | −0.19293 (15) | 0.77176 (14) | 0.5062 (3) | 0.0449 (5) | |
C2 | −0.19188 (15) | 0.86196 (14) | 0.4842 (3) | 0.0469 (5) | |
C3 | −0.27859 (19) | 0.90983 (16) | 0.4347 (3) | 0.0582 (6) | |
H3 | −0.2764 | 0.97 | 0.422 | 0.07* | |
C4 | −0.36823 (18) | 0.86717 (19) | 0.4044 (4) | 0.0666 (7) | |
H4 | −0.4272 | 0.8986 | 0.3704 | 0.08* | |
C5 | −0.37089 (17) | 0.77888 (18) | 0.4241 (4) | 0.0635 (7) | |
H5 | −0.4319 | 0.7508 | 0.4031 | 0.076* | |
C6 | −0.28444 (16) | 0.73034 (16) | 0.4747 (3) | 0.0543 (6) | |
H6 | −0.2876 | 0.6702 | 0.4875 | 0.065* | |
C7 | −0.08275 (16) | 0.64231 (14) | 0.5353 (3) | 0.0444 (5) | |
C8 | 0.02513 (16) | 0.61601 (14) | 0.6081 (3) | 0.0465 (5) | |
H8A | 0.0515 | 0.6411 | 0.7369 | 0.056* | |
H8B | 0.0292 | 0.5531 | 0.6211 | 0.056* | |
C9 | 0.08797 (15) | 0.64552 (15) | 0.4718 (3) | 0.0437 (5) | |
C10 | 0.23819 (17) | 0.60854 (14) | 0.3636 (3) | 0.0494 (5) | |
C11 | 0.33523 (18) | 0.58501 (16) | 0.4524 (3) | 0.0567 (6) | |
C12 | 0.4116 (2) | 0.60164 (18) | 0.3623 (4) | 0.0701 (7) | |
H12 | 0.4763 | 0.585 | 0.4224 | 0.084* | |
C13 | 0.3912 (2) | 0.6429 (2) | 0.1836 (4) | 0.0764 (8) | |
H13 | 0.4422 | 0.6547 | 0.1228 | 0.092* | |
C14 | 0.2958 (2) | 0.66657 (18) | 0.0949 (4) | 0.0710 (7) | |
H14 | 0.2825 | 0.6947 | −0.0258 | 0.085* | |
C15 | 0.21891 (19) | 0.64911 (16) | 0.1830 (4) | 0.0595 (6) | |
H15 | 0.1542 | 0.6647 | 0.1206 | 0.071* | |
N1 | −0.10196 (12) | 0.72631 (11) | 0.5652 (3) | 0.0479 (4) | |
H1N | −0.0523 | 0.7564 | 0.6287 | 0.057* | |
N2 | 0.16193 (13) | 0.59006 (12) | 0.4599 (3) | 0.0514 (5) | |
H2N | 0.1627 | 0.5399 | 0.5148 | 0.062* | |
O1 | −0.14642 (13) | 0.59039 (10) | 0.4540 (3) | 0.0607 (4) | |
O2 | 0.07446 (11) | 0.71541 (10) | 0.3868 (2) | 0.0543 (4) | |
Cl1 | −0.07891 (4) | 0.91714 (4) | 0.52012 (9) | 0.0599 (2) | |
Cl2 | 0.36153 (5) | 0.53220 (6) | 0.67829 (10) | 0.0792 (3) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0449 (12) | 0.0454 (14) | 0.0446 (11) | 0.0017 (9) | 0.0115 (9) | −0.0026 (9) |
C2 | 0.0521 (13) | 0.0417 (14) | 0.0490 (12) | 0.0019 (10) | 0.0164 (10) | −0.0002 (9) |
C3 | 0.0653 (16) | 0.0489 (15) | 0.0625 (15) | 0.0124 (12) | 0.0192 (12) | 0.0028 (11) |
C4 | 0.0545 (15) | 0.072 (2) | 0.0730 (17) | 0.0135 (13) | 0.0144 (12) | 0.0016 (13) |
C5 | 0.0466 (13) | 0.074 (2) | 0.0698 (16) | −0.0023 (12) | 0.0144 (11) | −0.0043 (13) |
C6 | 0.0515 (13) | 0.0530 (15) | 0.0605 (13) | −0.0026 (11) | 0.0173 (11) | −0.0016 (11) |
C7 | 0.0541 (13) | 0.0376 (13) | 0.0424 (11) | −0.0014 (10) | 0.0134 (10) | 0.0026 (9) |
C8 | 0.0534 (13) | 0.0413 (13) | 0.0449 (11) | 0.0057 (10) | 0.0121 (10) | 0.0009 (9) |
C9 | 0.0464 (12) | 0.0392 (13) | 0.0438 (11) | −0.0002 (10) | 0.0075 (9) | −0.0033 (9) |
C10 | 0.0526 (13) | 0.0401 (13) | 0.0584 (13) | 0.0017 (10) | 0.0189 (10) | −0.0028 (10) |
C11 | 0.0546 (14) | 0.0564 (16) | 0.0598 (14) | −0.0020 (11) | 0.0151 (11) | −0.0047 (11) |
C12 | 0.0548 (15) | 0.077 (2) | 0.0827 (19) | −0.0055 (13) | 0.0240 (14) | −0.0054 (15) |
C13 | 0.0774 (19) | 0.077 (2) | 0.088 (2) | −0.0130 (16) | 0.0453 (16) | −0.0037 (16) |
C14 | 0.091 (2) | 0.0587 (17) | 0.0704 (16) | −0.0004 (14) | 0.0334 (15) | 0.0047 (13) |
C15 | 0.0691 (16) | 0.0501 (14) | 0.0620 (14) | 0.0044 (12) | 0.0210 (12) | 0.0043 (11) |
N1 | 0.0429 (10) | 0.0368 (11) | 0.0623 (11) | −0.0002 (8) | 0.0096 (8) | −0.0050 (8) |
N2 | 0.0529 (11) | 0.0420 (11) | 0.0614 (11) | 0.0048 (8) | 0.0178 (9) | 0.0070 (8) |
O1 | 0.0604 (10) | 0.0435 (10) | 0.0734 (11) | −0.0032 (8) | 0.0069 (8) | −0.0059 (8) |
O2 | 0.0569 (9) | 0.0424 (10) | 0.0649 (9) | 0.0056 (7) | 0.0172 (7) | 0.0097 (7) |
Cl1 | 0.0637 (4) | 0.0444 (4) | 0.0747 (4) | −0.0066 (3) | 0.0230 (3) | −0.0025 (3) |
Cl2 | 0.0572 (4) | 0.1069 (6) | 0.0703 (5) | 0.0077 (3) | 0.0092 (3) | 0.0168 (4) |
C1—C6 | 1.390 (3) | C8—H8B | 0.97 |
C1—C2 | 1.394 (3) | C9—O2 | 1.221 (3) |
C1—N1 | 1.414 (3) | C9—N2 | 1.352 (3) |
C2—C3 | 1.381 (3) | C10—C15 | 1.381 (3) |
C2—Cl1 | 1.746 (2) | C10—C11 | 1.388 (3) |
C3—C4 | 1.376 (3) | C10—N2 | 1.417 (3) |
C3—H3 | 0.93 | C11—C12 | 1.385 (3) |
C4—C5 | 1.364 (4) | C11—Cl2 | 1.742 (2) |
C4—H4 | 0.93 | C12—C13 | 1.374 (4) |
C5—C6 | 1.384 (3) | C12—H12 | 0.93 |
C5—H5 | 0.93 | C13—C14 | 1.370 (4) |
C6—H6 | 0.93 | C13—H13 | 0.93 |
C7—O1 | 1.224 (2) | C14—C15 | 1.384 (3) |
C7—N1 | 1.344 (3) | C14—H14 | 0.93 |
C7—C8 | 1.515 (3) | C15—H15 | 0.93 |
C8—C9 | 1.514 (3) | N1—H1N | 0.86 |
C8—H8A | 0.97 | N2—H2N | 0.86 |
C6—C1—C2 | 118.09 (19) | O2—C9—N2 | 123.54 (19) |
C6—C1—N1 | 122.5 (2) | O2—C9—C8 | 121.98 (18) |
C2—C1—N1 | 119.36 (18) | N2—C9—C8 | 114.42 (19) |
C3—C2—C1 | 121.7 (2) | C15—C10—C11 | 118.8 (2) |
C3—C2—Cl1 | 118.39 (18) | C15—C10—N2 | 121.9 (2) |
C1—C2—Cl1 | 119.95 (16) | C11—C10—N2 | 119.3 (2) |
C4—C3—C2 | 119.1 (2) | C12—C11—C10 | 120.9 (2) |
C4—C3—H3 | 120.5 | C12—C11—Cl2 | 119.2 (2) |
C2—C3—H3 | 120.5 | C10—C11—Cl2 | 119.83 (18) |
C5—C4—C3 | 120.2 (2) | C13—C12—C11 | 119.5 (3) |
C5—C4—H4 | 119.9 | C13—C12—H12 | 120.3 |
C3—C4—H4 | 119.9 | C11—C12—H12 | 120.3 |
C4—C5—C6 | 121.2 (2) | C14—C13—C12 | 120.1 (3) |
C4—C5—H5 | 119.4 | C14—C13—H13 | 119.9 |
C6—C5—H5 | 119.4 | C12—C13—H13 | 119.9 |
C5—C6—C1 | 119.8 (2) | C13—C14—C15 | 120.7 (3) |
C5—C6—H6 | 120.1 | C13—C14—H14 | 119.7 |
C1—C6—H6 | 120.1 | C15—C14—H14 | 119.7 |
O1—C7—N1 | 123.4 (2) | C10—C15—C14 | 120.0 (2) |
O1—C7—C8 | 121.79 (19) | C10—C15—H15 | 120 |
N1—C7—C8 | 114.84 (19) | C14—C15—H15 | 120 |
C9—C8—C7 | 112.33 (17) | C7—N1—C1 | 128.66 (18) |
C9—C8—H8A | 109.1 | C7—N1—H1N | 115.7 |
C7—C8—H8A | 109.1 | C1—N1—H1N | 115.7 |
C9—C8—H8B | 109.1 | C9—N2—C10 | 124.75 (19) |
C7—C8—H8B | 109.1 | C9—N2—H2N | 117.6 |
H8A—C8—H8B | 107.9 | C10—N2—H2N | 117.6 |
C6—C1—C2—C3 | 0.7 (3) | C15—C10—C11—Cl2 | −178.97 (18) |
N1—C1—C2—C3 | −177.32 (19) | N2—C10—C11—Cl2 | 0.8 (3) |
C6—C1—C2—Cl1 | −179.48 (15) | C10—C11—C12—C13 | 0.7 (4) |
N1—C1—C2—Cl1 | 2.5 (3) | Cl2—C11—C12—C13 | 179.7 (2) |
C1—C2—C3—C4 | −0.7 (3) | C11—C12—C13—C14 | −0.5 (4) |
Cl1—C2—C3—C4 | 179.50 (18) | C12—C13—C14—C15 | −0.3 (4) |
C2—C3—C4—C5 | 0.3 (4) | C11—C10—C15—C14 | −0.8 (4) |
C3—C4—C5—C6 | 0.0 (4) | N2—C10—C15—C14 | 179.5 (2) |
C4—C5—C6—C1 | 0.0 (4) | C13—C14—C15—C10 | 1.0 (4) |
C2—C1—C6—C5 | −0.4 (3) | O1—C7—N1—C1 | −2.9 (3) |
N1—C1—C6—C5 | 177.61 (19) | C8—C7—N1—C1 | 176.46 (18) |
O1—C7—C8—C9 | 101.8 (2) | C6—C1—N1—C7 | 26.0 (3) |
N1—C7—C8—C9 | −77.5 (2) | C2—C1—N1—C7 | −156.1 (2) |
C7—C8—C9—O2 | 37.4 (3) | O2—C9—N2—C10 | 6.1 (3) |
C7—C8—C9—N2 | −145.36 (18) | C8—C9—N2—C10 | −171.12 (19) |
C15—C10—C11—C12 | 0.0 (4) | C15—C10—N2—C9 | −43.0 (3) |
N2—C10—C11—C12 | 179.7 (2) | C11—C10—N2—C9 | 137.2 (2) |
Cg2 is the centroid of the C10/C15 phenyl ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1N···O2i | 0.86 | 2.24 | 3.038 (2) | 154 |
N2—H2N···O1ii | 0.86 | 2.03 | 2.856 (2) | 160 |
C8—H8A···O2i | 0.97 | 2.43 | 3.219 (3) | 138 |
C15—H15···O2iii | 0.93 | 2.54 | 3.265 (3) | 135 |
C3—H3···Cg2iv | 0.93 | 2.74 | 3.608 (2) | 155 |
C6—H6···O1 | 0.93 | 2.37 | 2.906 (3) | 116 |
C15—H15···O2 | 0.93 | 2.52 | 2.916 (3) | 106 |
N1—H1N···Cl1 | 0.86 | 2.58 | 2.9730 (18) | 109 |
Symmetry codes: (i) x, −y+3/2, z+1/2; (ii) −x, −y+1, −z+1; (iii) x, −y+3/2, z−1/2; (iv) −x, y+1/2, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C15H12Cl2N2O2 |
Mr | 323.17 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 295 |
a, b, c (Å) | 13.8819 (9), 15.3556 (10), 7.0316 (5) |
β (°) | 104.027 (7) |
V (Å3) | 1454.19 (17) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.45 |
Crystal size (mm) | 0.57 × 0.54 × 0.15 |
Data collection | |
Diffractometer | Oxford Diffraction Gemini R CCD |
Absorption correction | Analytical (CrysAlis PRO; Oxford Diffraction, 2009) |
Tmin, Tmax | 0.743, 0.938 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 13088, 2687, 1930 |
Rint | 0.042 |
(sin θ/λ)max (Å−1) | 0.604 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.044, 0.127, 1.03 |
No. of reflections | 2687 |
No. of parameters | 190 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.19, −0.39 |
Computer programs: CrysAlis PRO (Oxford Diffraction, 2009), SHELXS97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 2002), SHELXL97 (Sheldrick, 2008), PLATON (Spek, 2009) and WinGX (Farrugia, 1999).
Cg2 is the centroid of the C10/C15 phenyl ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1N···O2i | 0.86 | 2.24 | 3.038 (2) | 154 |
N2—H2N···O1ii | 0.86 | 2.03 | 2.856 (2) | 160 |
C8—H8A···O2i | 0.97 | 2.43 | 3.219 (3) | 138 |
C15—H15···O2iii | 0.93 | 2.54 | 3.265 (3) | 135 |
C3—H3···Cg2iv | 0.93 | 2.74 | 3.608 (2) | 155 |
C6—H6···O1 | 0.93 | 2.37 | 2.906 (3) | 116 |
C15—H15···O2 | 0.93 | 2.52 | 2.916 (3) | 106 |
N1—H1N···Cl1 | 0.86 | 2.58 | 2.9730 (18) | 109 |
Symmetry codes: (i) x, −y+3/2, z+1/2; (ii) −x, −y+1, −z+1; (iii) x, −y+3/2, z−1/2; (iv) −x, y+1/2, −z+1/2. |
Acknowledgements
MT and JK thank the Grant Agency of the Slovak Republic (VEGA 1/0817/08) and Structural Funds, Interreg IIIA, for financial support in purchasing the diffractometer. VZR thanks the University Grants Commission, Government of India, New Delhi for the award of a research fellowship.
References
Brandenburg, K. (2002). DIAMOND. Crystal Impact GbR, Bonn, Germany. Google Scholar
Farrugia, L. J. (1997). J. Appl. Cryst. 30, 565. CrossRef IUCr Journals Google Scholar
Farrugia, L. J. (1999). J. Appl. Cryst. 32, 837–838. CrossRef CAS IUCr Journals Google Scholar
Gowda, B. T., Foro, S., Suchetan, P. A. & Fuess, H. (2009). Acta Cryst. E65, o2516. Web of Science CSD CrossRef IUCr Journals Google Scholar
Gowda, B. T., Kozisek, J., Svoboda, I. & Fuess, H. (2007). Z. Naturforsch. Teil A, 62, 91–100. CAS Google Scholar
Gowda, B. T., Tokarčík, M., Rodrigues, V. Z., Kožíšek, J. & Fuess, H. (2010). Acta Cryst. E66, o1363. Web of Science CSD CrossRef IUCr Journals Google Scholar
Oxford Diffraction (2009). CrysAlis PRO. Oxford Diffraction Ltd, Yarnton, Oxfordshire, England. Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Spek, A. L. (2009). Acta Cryst. D65, 148–155. Web of Science CrossRef CAS IUCr Journals Google Scholar
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The amide moiety is an important constituent of many biologically significant compounds. As a part of studying the effect of substitutions on the structures of this class of compounds (Gowda et al., 2007; 2009; 2010), the crystal structure of N,N-bis(2-chlorophenyl)-malonamide has been determined (I) (Fig. 1).
The molecular structure of (I) includes three intermolecular hydrogen bonds (Table 1); two of them are C–H···O hydrogen bonds, the third is a non- classical N–H···Cl hydrogen bond. The two phenyl rings make an interplanar angle of 58.0 (1)°. The dihedral angle made by the two amido groups is 65.0 (2)°. The conformation of the ortho-chlorosubstituent is anti to the nearest carbonyl C=O bond, as indicated by the torsion angles, C2—C1—N1—C7 = -156.1 (2)° and C11—C10—N2—C9 = 137.2 (2)° in the first and the second phenyl rings, respectively. The chlorine Cl atom attached to the C1/C6 phenyl ring gives rise to a non conventional N–H···Cl hydrogen bond, with N–Cl distance of 2.9730 (18) Å and angle of 109°. The second chlorine atom, attached to the C10/C15 phenyl ring, makes a short intramolecular contact of 2.960 (2)Å with the nearest amide N atom, forming the N–H···Cl angle of 98°. In the crystal, the molecules are linked by intermolecular N–H···O hydrogen bonds into the chains running along the base vector [0 1 1] parallel to the bc-plane (Fig. 2). The chains are further stabilized by C–H···π interaction between the C3 atom of the C1/C6 ring and the centroid Cg2 of the phenyl ring C10/C15 at the position (-x, y + 1/2, -z + 1/2).