supplementary materials


hb7085 scheme

Acta Cryst. (2013). E69, o1073    [ doi:10.1107/S1600536813015481 ]

4-Nitro-N^2^-(pyridin-4-ylmethylidene)benzene-1,2-diamine

G.-L. Liu, J. Sun, J.-C. Zhang, J. Mei and C. Guo

Abstract top

In the title compound, C12H10N4O2, the dihedral angle between the aromatic rings is 43.18 (16)°. The nitro group is rotated from its attached ring by 7.8 (2)° and a short intramolecular N-H...N contact occurs. In the crystal, the molecules are linked by N-H...N and C-H...O hydrogen bonds, generating a three-dimensional network.

Related literature top

For the synthesis, see: Luo et al. (2009).

Experimental top

The title compound, (I), which may have applications as a metal fluoresence probe, was prepared by the literature method (Luo et al., 2009). Yellow blocks were obtained by dissolving (I) (0.18 g, 1.0mmol) in ethanol (25 ml) and evaporating the solvent slowly at room temperature.

Refinement top

H atoms were positioned geometrically and refined as riding groups, with N—H = 0.86 and C—H = 0.93 Å for aromatic H, and constrained to ride on their parent atoms, with Uiso(H) = xUeq(C), where x = 1.2 for aromatic H, and x = 1.5 for other H.

Computing details top

Data collection: CAD-4 EXPRESS (Enraf–Nonius, 1994); cell refinement: CAD-4 EXPRESS (Enraf–Nonius, 1994); data reduction: XCAD4 (Harms & Wocadlo, 1995); 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: PLATON (Spek, 2009).

Figures top
[Figure 1] Fig. 1. The molecular structure of the title molecule, with displacement ellipsoids drawn at the 50% probability level.
[Figure 2] Fig. 2. A packing diagram of the title molecule.
4-Nitro-N2-(pyridin-4-ylmethylidene)benzene-1,2-diamine top
Crystal data top
C12H10N4O2Dx = 1.422 Mg m3
Mr = 242.24Melting point: 449.65 K
Monoclinic, C2/cMo Kα radiation, λ = 0.71073 Å
a = 21.324 (4) ÅCell parameters from 25 reflections
b = 9.1480 (18) Åθ = 10–13°
c = 12.950 (3) ŵ = 0.10 mm1
β = 116.36 (3)°T = 293 K
V = 2263.5 (8) Å3Block, yellow
Z = 80.30 × 0.20 × 0.10 mm
F(000) = 1008
Data collection top
Enraf–Nonius CAD-4
diffractometer
1247 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tubeRint = 0.038
Graphite monochromatorθmax = 25.4°, θmin = 2.1°
ω/2θ scansh = 025
Absorption correction: ψ scan
(North et al., 1968)
k = 011
Tmin = 0.970, Tmax = 0.990l = 1514
2128 measured reflections3 standard reflections every 200 reflections
2070 independent reflections intensity decay: 1%
Refinement top
Refinement on F2Secondary atom site location: difference Fourier map
Least-squares matrix: fullHydrogen site location: inferred from neighbouring sites
R[F2 > 2σ(F2)] = 0.058H-atom parameters constrained
wR(F2) = 0.175 w = 1/[σ2(Fo2) + (0.090P)2]
where P = (Fo2 + 2Fc2)/3
S = 1.01(Δ/σ)max < 0.001
2070 reflectionsΔρmax = 0.19 e Å3
164 parametersΔρmin = 0.18 e Å3
0 restraintsExtinction correction: SHELXL, Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4
Primary atom site location: structure-invariant direct methodsExtinction coefficient: 0.0052 (12)
Crystal data top
C12H10N4O2V = 2263.5 (8) Å3
Mr = 242.24Z = 8
Monoclinic, C2/cMo Kα radiation
a = 21.324 (4) ŵ = 0.10 mm1
b = 9.1480 (18) ÅT = 293 K
c = 12.950 (3) Å0.30 × 0.20 × 0.10 mm
β = 116.36 (3)°
Data collection top
Enraf–Nonius CAD-4
diffractometer
1247 reflections with I > 2σ(I)
Absorption correction: ψ scan
(North et al., 1968)
Rint = 0.038
Tmin = 0.970, Tmax = 0.990θmax = 25.4°
2128 measured reflections3 standard reflections every 200 reflections
2070 independent reflections intensity decay: 1%
Refinement top
R[F2 > 2σ(F2)] = 0.058H-atom parameters constrained
wR(F2) = 0.175Δρmax = 0.19 e Å3
S = 1.01Δρmin = 0.18 e Å3
2070 reflectionsAbsolute structure: ?
164 parametersAbsolute structure parameter: ?
0 restraintsRogers parameter: ?
Special details top

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 > 2sigma(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) top
xyzUiso*/Ueq
C10.32477 (14)0.2795 (3)0.0542 (3)0.0521 (8)
H1A0.32290.21450.11080.062*
N10.23039 (15)0.4169 (4)0.2041 (3)0.0792 (10)
O10.18599 (16)0.5126 (4)0.2272 (3)0.1194 (12)
N20.42131 (15)0.3378 (3)0.2557 (2)0.0666 (8)
H2A0.42190.39800.30720.080*
H2B0.44990.26520.27540.080*
C20.27963 (16)0.3970 (4)0.0840 (3)0.0596 (9)
O20.23537 (15)0.3379 (4)0.2766 (3)0.0991 (10)
N30.42154 (12)0.1420 (2)0.09465 (19)0.0461 (6)
C30.28139 (17)0.4952 (4)0.0015 (4)0.0714 (11)
H3B0.25060.57400.02230.086*
C40.32854 (17)0.4753 (3)0.1102 (4)0.0664 (10)
H4A0.32970.54140.16560.080*
N40.53086 (14)0.3605 (2)0.1282 (2)0.0546 (7)
C50.37562 (15)0.3574 (3)0.1443 (3)0.0526 (8)
C60.37257 (14)0.2579 (3)0.0586 (2)0.0455 (7)
C70.40423 (15)0.0216 (3)0.0405 (2)0.0472 (7)
H7A0.35970.01410.02050.057*
C80.45009 (14)0.1054 (3)0.0682 (2)0.0440 (7)
C90.52046 (15)0.1025 (3)0.1456 (2)0.0475 (8)
H9A0.54200.01480.17890.057*
C100.55786 (15)0.2301 (3)0.1725 (2)0.0501 (7)
H10A0.60500.22580.22470.060*
C110.46362 (17)0.3624 (3)0.0523 (3)0.0578 (9)
H11A0.44350.45130.01940.069*
C120.42246 (16)0.2395 (3)0.0201 (3)0.0541 (8)
H12A0.37590.24640.03410.065*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
C10.0439 (16)0.0497 (17)0.0602 (19)0.0008 (14)0.0209 (15)0.0038 (15)
N10.0479 (17)0.081 (2)0.093 (3)0.0097 (17)0.0174 (18)0.035 (2)
O10.0750 (18)0.108 (2)0.143 (3)0.0420 (18)0.0195 (18)0.053 (2)
N20.0734 (19)0.0603 (17)0.0600 (18)0.0034 (15)0.0241 (15)0.0172 (14)
C20.0397 (16)0.056 (2)0.075 (2)0.0068 (15)0.0181 (16)0.0182 (17)
O20.0711 (19)0.129 (3)0.072 (2)0.0121 (17)0.0095 (15)0.0210 (18)
N30.0456 (14)0.0417 (14)0.0456 (14)0.0029 (11)0.0154 (11)0.0011 (11)
C30.0437 (18)0.047 (2)0.118 (3)0.0074 (15)0.031 (2)0.014 (2)
C40.057 (2)0.0462 (19)0.102 (3)0.0031 (16)0.041 (2)0.0124 (19)
N40.0548 (16)0.0442 (15)0.0627 (17)0.0053 (12)0.0242 (14)0.0004 (12)
C50.0489 (17)0.0417 (17)0.070 (2)0.0083 (14)0.0285 (17)0.0072 (15)
C60.0416 (15)0.0404 (15)0.0510 (17)0.0003 (13)0.0174 (14)0.0020 (13)
C70.0415 (15)0.0455 (17)0.0451 (16)0.0009 (13)0.0106 (13)0.0002 (13)
C80.0461 (16)0.0438 (17)0.0389 (15)0.0014 (13)0.0160 (13)0.0006 (12)
C90.0471 (17)0.0437 (17)0.0465 (17)0.0015 (13)0.0159 (14)0.0017 (13)
C100.0442 (16)0.0512 (18)0.0503 (17)0.0023 (14)0.0170 (13)0.0015 (14)
C110.064 (2)0.0414 (18)0.063 (2)0.0051 (16)0.0235 (17)0.0064 (15)
C120.0486 (17)0.0504 (19)0.0527 (17)0.0013 (15)0.0129 (14)0.0052 (15)
Geometric parameters (Å, º) top
C1—C61.375 (4)C4—H4A0.9300
C1—C21.379 (4)N4—C111.331 (4)
C1—H1A0.9300N4—C101.338 (3)
N1—O11.225 (4)C5—C61.414 (4)
N1—O21.226 (4)C7—C81.457 (4)
N1—C21.450 (5)C7—H7A0.9300
N2—C51.347 (4)C8—C121.383 (4)
N2—H2A0.8600C8—C91.386 (4)
N2—H2B0.8600C9—C101.368 (4)
C2—C31.384 (5)C9—H9A0.9300
N3—C71.269 (3)C10—H10A0.9300
N3—C61.414 (3)C11—C121.372 (4)
C3—C41.359 (5)C11—H11A0.9300
C3—H3B0.9300C12—H12A0.9300
C4—C51.405 (4)
C6—C1—C2120.4 (3)C4—C5—C6118.1 (3)
C6—C1—H1A119.8C1—C6—C5119.7 (3)
C2—C1—H1A119.8C1—C6—N3123.3 (3)
O1—N1—O2123.7 (4)C5—C6—N3117.0 (2)
O1—N1—C2117.7 (4)N3—C7—C8123.8 (3)
O2—N1—C2118.6 (3)N3—C7—H7A118.1
C5—N2—H2A120.0C8—C7—H7A118.1
C5—N2—H2B120.0C12—C8—C9116.8 (3)
H2A—N2—H2B120.0C12—C8—C7119.4 (2)
C1—C2—C3120.9 (3)C9—C8—C7123.7 (3)
C1—C2—N1118.7 (4)C10—C9—C8119.3 (3)
C3—C2—N1120.3 (3)C10—C9—H9A120.4
C7—N3—C6118.5 (2)C8—C9—H9A120.4
C4—C3—C2119.3 (3)N4—C10—C9124.1 (3)
C4—C3—H3B120.4N4—C10—H10A118.0
C2—C3—H3B120.4C9—C10—H10A118.0
C3—C4—C5121.7 (3)N4—C11—C12123.2 (3)
C3—C4—H4A119.2N4—C11—H11A118.4
C5—C4—H4A119.2C12—C11—H11A118.4
C11—N4—C10116.5 (2)C11—C12—C8120.2 (3)
N2—C5—C4120.9 (3)C11—C12—H12A119.9
N2—C5—C6121.0 (3)C8—C12—H12A119.9
C6—C1—C2—C30.0 (5)N2—C5—C6—N32.8 (4)
C6—C1—C2—N1179.5 (3)C4—C5—C6—N3178.6 (2)
O1—N1—C2—C1172.5 (3)C7—N3—C6—C132.3 (4)
O2—N1—C2—C17.6 (5)C7—N3—C6—C5149.7 (3)
O1—N1—C2—C38.0 (5)C6—N3—C7—C8179.3 (2)
O2—N1—C2—C3171.9 (3)N3—C7—C8—C12167.2 (3)
C1—C2—C3—C40.3 (5)N3—C7—C8—C99.4 (4)
N1—C2—C3—C4179.2 (3)C12—C8—C9—C101.7 (4)
C2—C3—C4—C50.0 (5)C7—C8—C9—C10175.0 (3)
C3—C4—C5—N2178.9 (3)C11—N4—C10—C91.1 (4)
C3—C4—C5—C60.4 (4)C8—C9—C10—N40.2 (4)
C2—C1—C6—C50.4 (4)C10—N4—C11—C120.7 (5)
C2—C1—C6—N3178.3 (3)N4—C11—C12—C80.9 (5)
N2—C5—C6—C1179.1 (3)C9—C8—C12—C112.0 (4)
C4—C5—C6—C10.6 (4)C7—C8—C12—C11174.8 (3)
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
N2—H2A···N4i0.862.423.091 (3)135
N2—H2B···N30.862.422.751 (3)103
C10—H10A···O1ii0.932.493.156 (5)128
Symmetry codes: (i) x+1, y+1, z+1/2; (ii) x+1/2, y+1/2, z+1/2.

Experimental details

Crystal data
Chemical formulaC12H10N4O2
Mr242.24
Crystal system, space groupMonoclinic, C2/c
Temperature (K)293
a, b, c (Å)21.324 (4), 9.1480 (18), 12.950 (3)
β (°) 116.36 (3)
V3)2263.5 (8)
Z8
Radiation typeMo Kα
µ (mm1)0.10
Crystal size (mm)0.30 × 0.20 × 0.10
Data collection
DiffractometerEnraf–Nonius CAD-4
diffractometer
Absorption correctionψ scan
(North et al., 1968)
Tmin, Tmax0.970, 0.990
No. of measured, independent and
observed [I > 2σ(I)] reflections
2128, 2070, 1247
Rint0.038
(sin θ/λ)max1)0.603
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.058, 0.175, 1.01
No. of reflections2070
No. of parameters164
No. of restraints0
H-atom treatmentH-atom parameters constrained
Δρmax, Δρmin (e Å3)0.19, 0.18

Computer programs: CAD-4 EXPRESS (Enraf–Nonius, 1994), XCAD4 (Harms & Wocadlo, 1995), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008), PLATON (Spek, 2009).

Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
N2—H2A···N4i0.862.423.091 (3)135
N2—H2B···N30.862.422.751 (3)103
C10—H10A···O1ii0.932.493.156 (5)128
Symmetry codes: (i) x+1, y+1, z+1/2; (ii) x+1/2, y+1/2, z+1/2.
references
References top

Enraf–Nonius (1994). CAD-4 EXPRESS. Enraf–Nonius, Delft, The Netherlands.

Harms, K. & Wocadlo, S. (1995). XCAD4. University of Marburg, Germany.

Luo, T. T., Wu, H. C. & Jao, Y. C. (2009). Angew. Chem. 48, 9461–9464.

North, A. C. T., Phillips, D. C. & Mathews, F. S. (1968). Acta Cryst. A24, 351–359.

Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122.

Spek, A. L. (2009). Acta Cryst. D65, 148–155.