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Acta Crystallogr Sect E Struct Rep Online. 2011 January 1; 67(Pt 1): o117.
Published online 2010 December 11. doi:  10.1107/S1600536810051330
PMCID: PMC3050154

N,N′-Diphenyl­but-2-enediamide

Abstract

In the title compound, C16H14N2O2, the conformations of the N—H and C=O bonds in the C—NH—CO—CH =CH—CO—NH—C segment are anti to each other. The two C=O bonds are also anti to each other. The two phenyl rings make an inter­planar angle of 41.2 (1)°. An intra­molecular N—H(...)O hydrogen bond occurs. In the crystal, inter­molecular N—H(...)O hydrogen bonding links the mol­ecules into infinite chains along the a axis.

Related literature

For related structures, see: Gowda, Foro et al. (2010 [triangle]); Gowda, Tokarčík et al. (2010 [triangle]).

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Object name is e-67-0o117-scheme1.jpg

Experimental

Crystal data

  • C16H14N2O2
  • M r = 266.29
  • Orthorhombic, An external file that holds a picture, illustration, etc.
Object name is e-67-0o117-efi1.jpg
  • a = 6.604 (1) Å
  • b = 13.358 (2) Å
  • c = 15.474 (2) Å
  • V = 1365.1 (3) Å3
  • Z = 4
  • Cu Kα radiation
  • μ = 0.70 mm−1
  • T = 299 K
  • 0.35 × 0.30 × 0.25 mm

Data collection

  • Enraf–Nonius CAD-4 diffractometer
  • 3656 measured reflections
  • 1422 independent reflections
  • 1339 reflections with I > 2σ(I)
  • R int = 0.117
  • 3 standard reflections every 120 min intensity decay: 0.5%

Refinement

  • R[F 2 > 2σ(F 2)] = 0.043
  • wR(F 2) = 0.100
  • S = 1.06
  • 1422 reflections
  • 188 parameters
  • 2 restraints
  • H atoms treated by a mixture of independent and constrained refinement
  • Δρmax = 0.11 e Å−3
  • Δρmin = −0.13 e Å−3

Data collection: CAD-4-PC (Enraf–Nonius, 1996 [triangle]); cell refinement: CAD-4-PC; data reduction: REDU4 (Stoe & Cie, 1987 [triangle]); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 [triangle]); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 [triangle]); molecular graphics: PLATON (Spek, 2009 [triangle]); software used to prepare material for publication: SHELXL97.

Table 1
Hydrogen-bond geometry (Å, °)

Supplementary Material

Crystal structure: contains datablocks I, global. DOI: 10.1107/S1600536810051330/ng5082sup1.cif

Structure factors: contains datablocks I. DOI: 10.1107/S1600536810051330/ng5082Isup2.hkl

Additional supplementary materials: crystallographic information; 3D view; checkCIF report

Acknowledgments

KS thanks the University Grants Commission, Government of India, New Delhi, for the award of a research fellowship under its faculty improvement program.

supplementary crystallographic information

Comment

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, Foro et al., 2010; Gowda, Tokarčík et al., 2010), the crystal structure of N,N-bis(phenyl)-maleamide has been determined (I) (Fig. 1).

In the structure, the conformations of N—H and C=O bonds in both the amide groups of the C—NH—CO—CH ═CH—CO—NH—C segment are anti to each other. The two C=O bonds are also anti to each other, while one of them is syn to the adjacent C—H bond and the other is anti to its adjacent C—H bond. Further, C1—N1—C7—C8 and C11—N2—C10—C9 segments are nearly linear and so also the C1—N1—C7—O1 and C11—N2—C10—O2 segments. The torsion angles of C2—C1—N1—C7 and C6—C1—N1—C7 are 174.4 (3)° and -4.9 (4)°, respectively, while those of C12—C11—N2—C10 and C16—C11—N2—C10 are 40.4 (4)° and -143.9 (3)°.

The two phenyl rings in (I) make an interplanar angle of 41.2 (1)°. while the two benzene rings (C1 to C6 and C11 to C16) make the dihedral angles of 8.0 (1)° and 38.3 (1)°, respectively, with the central amide group (N1—C7—C8—C9—C10—N2).

The crystal structure (Fig. 2) exhibits both the intramolecular and intermolecular N–H···O hydrogen bonds (Table 1). The latter link the molecules into chains.

Experimental

A mixture of maleic acid (0.2 mol) and phosphorous oxy chloride (0.3 mol) were refluxed for 3 hrs on a water bath at 95° C. The aniline was added dropwise with stirring and continuing heating for about 30 min. It was later kept aside for 12 hrs for completion of the reaction. The reaction mixture was then added to ice. The precipitated product was washed with water, dilute HCl, dilute NaOH and again with water. The product was filtered, dried and recrystallized from DMF.

Prism like orange single crystals of the title compound used in X-ray diffraction studies were obtained by a slow evaporation of its DMF solution at room temperature.

Refinement

The H atoms of the NH groups were located in a difference map and later restrained to the distance N—H = 0.86 (2) Å. The other H atoms were positioned with idealized geometry using a riding model with C—H = 0.93 Å A l l H atoms were refined with isotropic displacement parameters (set to 1.2 times of the Ueq of the parent atom).

In the absence of significant anomalous dispersion effects, Friedel pairs were merged and the Δf"term set to zero.

Figures

Fig. 1.
Molecular structure of (I), showing the atom labelling scheme and displacement ellipsoids are drawn at the 50% probability level.
Fig. 2.
Molecular packing of (I) with hydrogen bonding shown as dashed lines.

Crystal data

C16H14N2O2F(000) = 560
Mr = 266.29Dx = 1.296 Mg m3
Orthorhombic, P212121Cu Kα radiation, λ = 1.54180 Å
Hall symbol: P 2ac 2abCell parameters from 25 reflections
a = 6.604 (1) Åθ = 8.0–20.1°
b = 13.358 (2) ŵ = 0.70 mm1
c = 15.474 (2) ÅT = 299 K
V = 1365.1 (3) Å3Prism, orange
Z = 40.35 × 0.30 × 0.25 mm

Data collection

Enraf–Nonius CAD-4 diffractometerRint = 0.117
Radiation source: fine-focus sealed tubeθmax = 66.9°, θmin = 4.4°
graphiteh = 0→7
ω scansk = −15→15
3656 measured reflectionsl = −18→5
1422 independent reflections3 standard reflections every 120 min
1339 reflections with I > 2σ(I) intensity decay: 0.5%

Refinement

Refinement on F2Secondary atom site location: difference Fourier map
Least-squares matrix: fullHydrogen site location: inferred from neighbouring sites
R[F2 > 2σ(F2)] = 0.043H atoms treated by a mixture of independent and constrained refinement
wR(F2) = 0.100w = 1/[σ2(Fo2) + (0.0279P)2 + 0.0657P] where P = (Fo2 + 2Fc2)/3
S = 1.06(Δ/σ)max = 0.025
1422 reflectionsΔρmax = 0.11 e Å3
188 parametersΔρmin = −0.13 e Å3
2 restraintsExtinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4
Primary atom site location: structure-invariant direct methodsExtinction coefficient: 0.0140 (9)

Special details

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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2)

xyzUiso*/Ueq
C1−0.0250 (3)0.71987 (19)0.85351 (17)0.0547 (6)
C2−0.0384 (3)0.8224 (2)0.8469 (2)0.0678 (7)
H20.06530.85790.82020.081*
C3−0.2036 (4)0.8730 (2)0.8794 (2)0.0761 (8)
H3−0.21050.94240.87470.091*
C4−0.3580 (4)0.8212 (3)0.9186 (2)0.0760 (8)
H4−0.47020.85500.94020.091*
C5−0.3449 (3)0.7192 (3)0.9256 (2)0.0750 (9)
H5−0.44900.68410.95250.090*
C6−0.1793 (3)0.6671 (2)0.89343 (17)0.0630 (7)
H6−0.17220.59780.89860.076*
C70.2087 (3)0.57754 (19)0.82283 (19)0.0610 (7)
C80.4088 (3)0.5604 (2)0.78135 (18)0.0653 (7)
H80.46460.61630.75450.078*
C90.5210 (3)0.4774 (2)0.7765 (2)0.0683 (8)
H90.64170.48790.74690.082*
C100.4997 (3)0.3727 (2)0.80698 (18)0.0597 (6)
C110.2874 (3)0.2512 (2)0.88312 (16)0.0581 (6)
C120.4328 (4)0.1895 (2)0.92070 (19)0.0731 (8)
H120.56750.20980.92280.088*
C130.3764 (4)0.0982 (3)0.9549 (2)0.0839 (9)
H130.47400.05700.97960.101*
C140.1789 (4)0.0676 (3)0.9529 (2)0.0882 (9)
H140.14230.00590.97580.106*
C150.0352 (4)0.1288 (2)0.9168 (2)0.0856 (9)
H15−0.09940.10830.91580.103*
C160.0868 (3)0.2196 (2)0.8821 (2)0.0687 (7)
H16−0.01240.26030.85780.082*
N10.1514 (2)0.67393 (16)0.81901 (16)0.0596 (6)
H1N0.227 (3)0.7171 (19)0.7929 (15)0.071*
N20.3325 (2)0.34685 (16)0.85126 (16)0.0617 (6)
H2N0.241 (3)0.3975 (19)0.8579 (19)0.074*
O10.1061 (2)0.51235 (14)0.85749 (17)0.0956 (8)
O20.6377 (2)0.31390 (16)0.79069 (14)0.0769 (6)

Atomic displacement parameters (Å2)

U11U22U33U12U13U23
C10.0536 (9)0.0455 (12)0.0648 (13)0.0038 (9)0.0018 (10)0.0006 (15)
C20.0679 (10)0.0500 (13)0.0856 (18)0.0021 (11)0.0090 (13)0.0060 (19)
C30.0837 (14)0.0501 (14)0.0944 (18)0.0131 (12)−0.0005 (16)0.003 (2)
C40.0719 (12)0.0706 (18)0.0856 (19)0.0169 (14)0.0090 (14)0.003 (2)
C50.0609 (11)0.0733 (19)0.091 (2)0.0053 (11)0.0134 (13)0.009 (2)
C60.0547 (9)0.0530 (14)0.0812 (16)0.0001 (10)0.0045 (11)0.0110 (18)
C70.0570 (9)0.0424 (12)0.0836 (17)0.0014 (9)0.0108 (12)0.0025 (17)
C80.0576 (10)0.0479 (12)0.0903 (17)−0.0045 (10)0.0169 (12)0.0066 (18)
C90.0561 (9)0.0573 (15)0.091 (2)0.0007 (10)0.0161 (13)0.0009 (19)
C100.0553 (10)0.0499 (13)0.0740 (15)0.0027 (9)0.0055 (11)−0.0068 (17)
C110.0680 (10)0.0448 (12)0.0616 (13)0.0093 (10)0.0031 (11)−0.0048 (16)
C120.0715 (12)0.0619 (15)0.0860 (18)0.0168 (13)−0.0039 (13)0.004 (2)
C130.0977 (17)0.0612 (17)0.093 (2)0.0209 (16)−0.0119 (17)0.009 (2)
C140.1098 (18)0.0530 (15)0.102 (2)−0.0005 (16)0.0011 (18)0.017 (2)
C150.0820 (14)0.0579 (16)0.117 (3)−0.0023 (13)−0.0005 (16)0.003 (2)
C160.0657 (12)0.0547 (14)0.0856 (18)0.0070 (11)−0.0023 (13)0.0048 (19)
N10.0511 (8)0.0435 (10)0.0841 (14)−0.0005 (8)0.0082 (9)0.0044 (14)
N20.0568 (8)0.0468 (11)0.0816 (14)0.0093 (8)0.0079 (10)0.0028 (14)
O10.0772 (9)0.0461 (9)0.164 (2)0.0100 (8)0.0493 (12)0.0271 (16)
O20.0675 (8)0.0636 (12)0.0995 (13)0.0182 (9)0.0157 (9)−0.0071 (14)

Geometric parameters (Å, °)

C1—C21.376 (4)C9—H90.9300
C1—C61.385 (3)C10—O21.230 (3)
C1—N11.421 (3)C10—N21.345 (3)
C2—C31.379 (4)C11—C161.390 (3)
C2—H20.9300C11—C121.392 (3)
C3—C41.374 (4)C11—N21.402 (3)
C3—H30.9300C12—C131.381 (5)
C4—C51.370 (5)C12—H120.9300
C4—H40.9300C13—C141.367 (4)
C5—C61.388 (3)C13—H130.9300
C5—H50.9300C14—C151.372 (4)
C6—H60.9300C14—H140.9300
C7—O11.227 (3)C15—C161.370 (4)
C7—N11.344 (3)C15—H150.9300
C7—C81.487 (3)C16—H160.9300
C8—C91.335 (4)N1—H1N0.862 (18)
C8—H80.9300N2—H2N0.912 (18)
C9—C101.482 (4)
C2—C1—C6119.5 (2)O2—C10—N2123.3 (3)
C2—C1—N1117.0 (2)O2—C10—C9117.9 (2)
C6—C1—N1123.4 (2)N2—C10—C9118.8 (2)
C1—C2—C3120.8 (3)C16—C11—C12118.9 (3)
C1—C2—H2119.6C16—C11—N2118.3 (2)
C3—C2—H2119.6C12—C11—N2122.7 (2)
C4—C3—C2120.1 (3)C13—C12—C11119.8 (2)
C4—C3—H3120.0C13—C12—H12120.1
C2—C3—H3120.0C11—C12—H12120.1
C5—C4—C3119.3 (3)C14—C13—C12120.8 (3)
C5—C4—H4120.3C14—C13—H13119.6
C3—C4—H4120.3C12—C13—H13119.6
C4—C5—C6121.3 (3)C13—C14—C15119.4 (3)
C4—C5—H5119.3C13—C14—H14120.3
C6—C5—H5119.3C15—C14—H14120.3
C1—C6—C5119.0 (3)C16—C15—C14121.0 (3)
C1—C6—H6120.5C16—C15—H15119.5
C5—C6—H6120.5C14—C15—H15119.5
O1—C7—N1122.9 (2)C15—C16—C11120.1 (3)
O1—C7—C8124.8 (2)C15—C16—H16120.0
N1—C7—C8112.3 (2)C11—C16—H16120.0
C9—C8—C7130.1 (3)C7—N1—C1129.0 (2)
C9—C8—H8114.9C7—N1—H1N119.9 (18)
C7—C8—H8114.9C1—N1—H1N111.1 (18)
C8—C9—C10135.5 (2)C10—N2—C11126.0 (2)
C8—C9—H9112.3C10—N2—H2N114.2 (19)
C10—C9—H9112.3C11—N2—H2N119.8 (18)
C6—C1—C2—C3−0.1 (5)C11—C12—C13—C14−0.5 (5)
N1—C1—C2—C3−179.4 (2)C12—C13—C14—C15−0.3 (5)
C1—C2—C3—C4−0.3 (5)C13—C14—C15—C160.5 (5)
C2—C3—C4—C50.5 (5)C14—C15—C16—C110.0 (5)
C3—C4—C5—C6−0.4 (6)C12—C11—C16—C15−0.7 (4)
C2—C1—C6—C50.2 (4)N2—C11—C16—C15−176.6 (3)
N1—C1—C6—C5179.5 (2)O1—C7—N1—C11.8 (5)
C4—C5—C6—C10.0 (5)C8—C7—N1—C1−177.7 (2)
O1—C7—C8—C9−3.9 (5)C2—C1—N1—C7174.4 (3)
N1—C7—C8—C9175.6 (3)C6—C1—N1—C7−4.9 (4)
C7—C8—C9—C100.5 (6)O2—C10—N2—C11−1.7 (4)
C8—C9—C10—O2−179.8 (3)C9—C10—N2—C11178.8 (3)
C8—C9—C10—N2−0.3 (6)C16—C11—N2—C10−143.9 (3)
C16—C11—C12—C131.0 (4)C12—C11—N2—C1040.4 (4)
N2—C11—C12—C13176.6 (3)

Hydrogen-bond geometry (Å, °)

D—H···AD—HH···AD···AD—H···A
N1—H1N···O2i0.86 (2)2.04 (2)2.884 (3)167 (2)
N2—H2N···O10.91 (2)1.77 (2)2.671 (3)167 (3)

Symmetry codes: (i) −x+1, y+1/2, −z+3/2.

Footnotes

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: NG5082).

References

  • Enraf–Nonius (1996). CAD-4-PC Enraf–Nonius, Delft, The Netherlands.
  • Gowda, B. T., Foro, S., Suchetan, P. A. & Fuess, H. (2010). Acta Cryst. E66, o187. [PMC free article] [PubMed]
  • Gowda, B. T., Tokarčík, M., Rodrigues, V. Z., Kožíšek, J. & Fuess, H. (2010). Acta Cryst. E66, o1363. [PMC free article] [PubMed]
  • Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. [PubMed]
  • Spek, A. L. (2009). Acta Cryst. D65, 148–155. [PMC free article] [PubMed]
  • Stoe & Cie (1987). REDU4 Stoe & Cie GmbH, Darmstadt, Germany.

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