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Acta Cryst. (2009). E65, o2526    [ doi:10.1107/S1600536809037842 ]

N,N'-Bis(2-quinolylcarbonyl)hydrazine

H.-M. Cheng, L. Chen, W. Lu, X. Shen and D.-R. Zhu

Abstract top

The title compound, C20H14N4O2, crystallizes in the orthorhombic system with a crystallographic twofold axis through the N-N bond. The molecule is non-planar and the dihedral angle between two amide groups is 74.9 (2)°. An intramolecular N-H...N hydrogen bond is present. In the crystal, the molecules are packed in chains running along the c axis through intermolecular N-H...O hydrogen bonds. These chains are further stabilized by intermolecular C-H...O hydrogen bonds and C-H...[pi] interactions leading to the formation of a three-dimensional network.

Comment top

(Un)symmetrical N,N'-diacylhydrazines are of interest because they are the basic structural components in heterocyclic chemistry and may be used as bridging ligands in coordination chemistry (Zhao & Bruke, 1997; Knödler et al., 2004; Bernhardt et al., 2005). We have reported the structure of N,N'-bis(2-picolinoyl)hydrazine (Shao et al., 1999). As a continuation of our investigations of the structure of N,N'-diacylhydrazines and their derivatives, herein, we report the crystal structure of the title compound. It was first prepared by aroylation of 2-quinolylcarbonylhydrazine with 2-quinolinecarbonyl chloride in dry pyridine (Jasinskas et al., 1975).

The X-ray analysis of the title compound (Fig. 1) indicates that the molecule is non-planar. The dihedral angle between the quinolyl ring and the amide group is 15.3 (2)° and that between the amide groups is 74.9 (2)°. Similarly to N,N'-bis(2-picolinoyl)hydrazine, the asymmetric unit contains half the molecule and the other half is related by a crystallographic twofold axis passing through the N2—N2i bond [symmetry code: (i) 3/2 - x, 1/2 - y, z]. The bond lengths and angles (Table 1) in the structure are in the normal ranges (Xu et al., 2006; Zheng et al., 2007). The C10—N2—N2i—C10i torsion angle is -87.7 (2)°. The two carbonyl groups and the H atoms of the N—N bond are in a trans orientation with respect to each other. This conformation is due mainly to the intramolecular N—H···N hydrogen bonds.

In the crystal (Fig. 2), each molecule is connected to another by a pair of intermolecular N—H···O hydrogen bonds (Table 2) between the amide H atoms and the O atoms of neighbouring carbonyl groups to form a ten-membered ring with the graph-set motif C4R22(10) (Bernstein et al., 1995). The same feature is also found in N,N'-bis(2-picolinoyl)hydrazine and 1,2-dibenzoylhydrazine (Shanmuga Sundara Raj et al., 2000). Due to presence of these intermolecular N—H···O hydrogen bonds, the molecules are packed into chains running along the c axis. These chains are further stabilized by intermolecular C—H···O hydrogen bonds and C—H···π interactions (Table 2) leading to the formation of a three-dimensional network.

Related literature top

For general background to the chemistry of N,N'-diacylhydrazines, see: Zhao & Bruke (1997); Knödler et al. (2004); Bernhardt et al. (2005). For the syntheses and structures of related compounds, see: Jasinskas et al. (1975); Shao et al. (1999); Xu et al. (2006); Zheng et al. (2007); Shanmuga Sundara Raj et al. (2000). For the synthesis of the title compound, see: Xie et al. (2009). For hydrogen-bond motifs, see: Bernstein et al. (1995);

Experimental top

The title compound was obtained unexpectedly in the synthesis of 3-methyl-4-(p-methylphenyl)-5-(2-quinolyl)-1,2,4-triazole by the reaction of N-formyl-N'-(2-quinolylcarbonyl)hydrazine (1 mmol) with 4,4'-dimethylphenylphosphazoanilide (1 mmol) in N,N-dimethylaniline (20 ml) at 463–473 K (Xie et al., 2009). It also can be prepared by literature method (Jasinskas et al., 1975). Diffraction quality crystals were obtained by recrystallization from ethanol (yield 31%).

Refinement top

All H atoms were located in a difference Fourier map and allowed to ride on their parent atoms at distances of 0.96Å (aromatic), 0.93Å (pyridyl), and with Uiso(H) values of 1.2 or 1.5 times of Ueq(C).

Computing details top

Data collection: APEX2 (Bruker, 2005); cell refinement: SAINT (Bruker, 2005); data reduction: SAINT (Bruker, 2005); 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).

Figures top
[Figure 1] Fig. 1. The structure of the title compound showing 50% probability displacement ellipsoids and atom-numbering scheme [symmetry code: (i) 3/2 - x, 1/2 - y, z].
[Figure 2] Fig. 2. The three-dimensional network formed via hydrogen bonds (dashed lines) and C—H···π interactions [symmetry code: (i) 1 - x, 1/2 + y, 1/2 - z].
N,N'-Bis(2-quinolylcarbonyl)hydrazine top
Crystal data top
C20H14N4O2F(000) = 712
Mr = 342.35Dx = 1.374 Mg m−3
Orthorhombic, PccnMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ab 2acCell parameters from 28 reflections
a = 11.649 (4) Åθ = 2.1–26.6°
b = 17.023 (6) ŵ = 0.09 mm−1
c = 8.349 (3) ÅT = 296 K
V = 1655.6 (10) Å3Block, colourless
Z = 40.26 × 0.12 × 0.08 mm
Data collection top
Bruker APEXII CCD
diffractometer		1629 independent reflections
Radiation source: fine-focus sealed tube816 reflections with I > 2σ(I)
graphiteRint = 0.082
ω scansθmax = 26.0°, θmin = 2.1°
Absorption correction: multi-scan
(SADABS; Bruker, 2005)		h = −14→14
Tmin = 0.976, Tmax = 0.993k = −21→18
10346 measured reflectionsl = −9→10
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)] = 0.046H-atom parameters constrained
wR(F2) = 0.115 w = 1/[σ2(Fo2) + (0.0525P)2]
where P = (Fo2 + 2Fc2)/3
S = 0.95(Δ/σ)max < 0.001
1629 reflectionsΔρmax = 0.17 e Å−3
119 parametersΔρmin = −0.19 e Å−3
0 restraintsExtinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4
Primary atom site location: structure-invariant direct methodsExtinction coefficient: 0.011 (2)
Crystal data top
C20H14N4O2V = 1655.6 (10) Å3
Mr = 342.35Z = 4
Orthorhombic, PccnMo Kα radiation
a = 11.649 (4) ŵ = 0.09 mm−1
b = 17.023 (6) ÅT = 296 K
c = 8.349 (3) Å0.26 × 0.12 × 0.08 mm
Data collection top
Bruker APEXII CCD
diffractometer		1629 independent reflections
Absorption correction: multi-scan
(SADABS; Bruker, 2005)		816 reflections with I > 2σ(I)
Tmin = 0.976, Tmax = 0.993Rint = 0.082
10346 measured reflectionsθmax = 26.0°
Refinement top
R[F2 > 2σ(F2)] = 0.046H-atom parameters constrained
wR(F2) = 0.115Δρmax = 0.17 e Å−3
S = 0.95Δρmin = −0.19 e Å−3
1629 reflectionsAbsolute structure: ?
119 parametersFlack parameter: ?
0 restraintsRogers parameter: ?
Special details top

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) top
xyzUiso*/Ueq
O10.61559 (14)0.28662 (9)0.3812 (2)0.0651 (5)
N10.69622 (14)0.44375 (10)0.1318 (2)0.0424 (5)
N20.73777 (18)0.28973 (9)0.1733 (2)0.0605 (6)
H2A0.77450.31970.10800.073*
C10.62868 (17)0.40522 (13)0.2314 (3)0.0432 (6)
C20.52811 (18)0.43630 (14)0.2994 (3)0.0520 (7)
H2B0.48410.40630.36940.062*
C30.49611 (18)0.51056 (15)0.2615 (3)0.0549 (7)
H3A0.42900.53170.30370.066*
C40.56521 (18)0.55552 (12)0.1576 (3)0.0450 (6)
C50.5394 (2)0.63312 (13)0.1127 (3)0.0599 (7)
H5A0.47390.65730.15300.072*
C60.6091 (2)0.67300 (14)0.0114 (3)0.0663 (8)
H6A0.59080.7243−0.01720.080*
C70.7083 (2)0.63781 (14)−0.0508 (3)0.0615 (7)
H7A0.75520.6658−0.12050.074*
C80.73620 (19)0.56297 (13)−0.0097 (3)0.0498 (6)
H8A0.80250.5401−0.05090.060*
C90.66544 (17)0.51985 (12)0.0947 (3)0.0401 (6)
C100.65956 (19)0.32223 (14)0.2702 (3)0.0471 (6)
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
O10.0692 (11)0.0517 (10)0.0743 (13)−0.0141 (9)0.0059 (10)0.0116 (10)
N10.0396 (11)0.0382 (11)0.0495 (12)−0.0009 (8)−0.0004 (9)−0.0006 (9)
N20.0861 (15)0.0349 (10)0.0605 (14)0.0080 (12)0.0094 (12)0.0031 (10)
C10.0407 (13)0.0388 (13)0.0501 (15)−0.0023 (11)−0.0059 (11)−0.0051 (11)
C20.0404 (14)0.0547 (17)0.0610 (17)−0.0066 (12)0.0063 (12)−0.0029 (13)
C30.0387 (13)0.0605 (18)0.0657 (17)0.0031 (12)0.0043 (12)−0.0063 (14)
C40.0379 (13)0.0428 (14)0.0543 (16)0.0046 (10)−0.0049 (11)−0.0065 (12)
C50.0508 (15)0.0484 (16)0.080 (2)0.0138 (13)−0.0026 (14)−0.0058 (15)
C60.0691 (18)0.0403 (15)0.089 (2)0.0079 (13)−0.0075 (16)0.0060 (15)
C70.0599 (16)0.0489 (16)0.076 (2)−0.0021 (13)0.0032 (14)0.0091 (14)
C80.0459 (14)0.0458 (15)0.0577 (16)0.0004 (11)0.0014 (11)0.0027 (12)
C90.0362 (12)0.0358 (12)0.0483 (14)0.0012 (10)−0.0064 (11)−0.0033 (11)
C100.0489 (14)0.0433 (15)0.0491 (15)−0.0100 (12)−0.0030 (12)−0.0013 (12)
Geometric parameters (Å, °) top
O1—C101.220 (3)C3—H3A0.9300
N1—C11.319 (3)C4—C51.406 (3)
N1—C91.379 (2)C4—C91.417 (3)
N2—C101.338 (3)C5—C61.354 (3)
N2—N2i1.382 (3)C5—H5A0.9300
N2—H2A0.8600C6—C71.401 (3)
C1—C21.405 (3)C6—H6A0.9300
C1—C101.493 (3)C7—C81.359 (3)
C2—C31.355 (3)C7—H7A0.9300
C2—H2B0.9300C8—C91.406 (3)
C3—C41.409 (3)C8—H8A0.9300
C1—N1—C9116.98 (18)C6—C5—H5A119.7
C10—N2—N2i123.0 (2)C4—C5—H5A119.7
C10—N2—H2A118.5C5—C6—C7120.7 (2)
N2i—N2—H2A118.5C5—C6—H6A119.6
N1—C1—C2124.4 (2)C7—C6—H6A119.6
N1—C1—C10117.6 (2)C8—C7—C6120.3 (2)
C2—C1—C10118.0 (2)C8—C7—H7A119.8
C3—C2—C1119.1 (2)C6—C7—H7A119.8
C3—C2—H2B120.5C7—C8—C9120.3 (2)
C1—C2—H2B120.5C7—C8—H8A119.8
C2—C3—C4119.5 (2)C9—C8—H8A119.8
C2—C3—H3A120.2N1—C9—C8118.5 (2)
C4—C3—H3A120.2N1—C9—C4122.2 (2)
C5—C4—C3123.5 (2)C8—C9—C4119.3 (2)
C5—C4—C9118.7 (2)O1—C10—N2122.7 (2)
C3—C4—C9117.8 (2)O1—C10—C1122.3 (2)
C6—C5—C4120.6 (2)N2—C10—C1115.1 (2)
Symmetry codes: (i) −x+3/2, −y+1/2, z.
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
N2—H2A···N10.862.312.689 (2)107
N2—H2A···O1ii0.862.352.978 (3)130
C5—H5A···O1iii0.932.453.177 (3)135
C8—H8A···Cg1iv0.932.643.449146
Symmetry codes: (ii) −x+3/2, y, z−1/2; (iii) −x+1, y+1/2, −z+1/2; (iv) −x−1/2, y, z−3/2.
Table 1
Selected geometric parameters (Å, °) top
O1—C101.220 (3)N2—C101.338 (3)
N1—C11.319 (3)N2—N2i1.382 (3)
N1—C91.379 (2)
C10—N2—N2i123.0 (2)O1—C10—C1122.3 (2)
O1—C10—N2122.7 (2)N2—C10—C1115.1 (2)
Symmetry codes: (i) −x+3/2, −y+1/2, z.
Table 2
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
N2—H2A···N10.862.312.689 (2)107
N2—H2A···O1ii0.862.352.978 (3)130
C5—H5A···O1iii0.932.453.177 (3)135
C8—H8A···Cg1iv0.932.643.449146
Symmetry codes: (ii) −x+3/2, y, z−1/2; (iii) −x+1, y+1/2, −z+1/2; (iv) −x−1/2, y, z−3/2.
Acknowledgements top

This work was funded by the National Natural Science Foundation of China (No. 20771059) and the Natural Science Foundation of Jiangsu Province (BK2008371).

references
References top

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