organic compounds
Nicotinohydrazide
aChemistry Department, `Sapienza' University of Rome, P. le A. Moro, 5, I-00185 Rome, Italy
*Correspondence e-mail: g.portalone@caspur.it
In the title compound (alternative name: pyridine-3-carbohydrazide, C6H7N3O), the contains a single molecule. In contrast with nicotinic acid and nicotinamide, the C=O bond is found to be oriented cis with respect to the Cipso C N fragment in the pyridine ring. The pyridine ring and the hydrazide group make a dihedral angle of 34.0 (2)°. In the molecules are associated into a three-dimensional framework by a combination of N—H⋯N and three-centre N—H⋯O hydrogen bonds.
Related literature
The structure of the same compound has been determined independently and is reported in the preceding paper (Priebe et al., 2008). For related literature, see: Bhat et al. (1974); Kutoglu & Scheringer (1983); Miwa et al. (1999); Portalone (2007); Portalone & Colapietro (2007). For computation of ring patterns formed by hydrogen bonds in crystal structures, see: Etter et al. (1990); Bernstein et al. (1995); Motherwell et al. (1999).
Experimental
Crystal data
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Data collection
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Refinement
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Data collection: CrysAlis CCD (Oxford Diffraction, 2006); cell CrysAlis CCD; data reduction: CrysAlis RED (Oxford Diffraction, 2006); program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999).
Supporting information
https://doi.org/10.1107/S1600536807066561/bh2149sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536807066561/bh2149Isup2.hkl
1 mmol of the title compound (purchased from Sigma-Aldrich at 97% purity) was dissolved in a mixture benzene/ethanol (8:1, 50 ml) and refluxed for 1 h. After cooling the solution to ambient temperature, a colorless precipitate was formed, which was collected by filtration and washed with benzene/ethanol (8:1). Crystals suitable for single-crystal X-ray diffraction were grown from a benzene solution, by slow evaporation of the solvent.
Diffraction from the very small crystals was weak; nevertheless, these data gave good structural results, albeit with a lower data/parameter ratio than usual. All H atoms were detected in a difference map, after the first cycles of the isotropic
The final full-matrix least-squares was carried out on F2 with anisotropic non-H atoms and isotropic H atoms. C-bonded H atoms were positioned with idealized geometry and refined using a riding model, with C—H bond lengths fixed to 0.95 Å and Uiso(H) = 1.2Ueq(carrier C). H atoms bonded to N atoms were refined freely with Uiso(H) = 1.2Ueq(carrier N). In the absence of significant in this light-atom study, measured Friedel pairs were merged.As a part of a more general study of multiple-hydrogen-bonding N -heterocyclic systems as potential supramolecular reagents (Portalone, 2007; Portalone & Colapietro, 2007), we report here the structure of the title compound (I, Fig. 1). The
of (I) comprises one independent molecule, and the angle between the mean planes of the acid hydrazine group and the pyridine ring is 34.0 (2)°. Noteworthy, in contrast to nicotinic acid (Kutoglu & Scheringer, 1983) and nicotinamide (Miwa et al., 1999), the C?O bond is oriented cis with respect to the C2—C3 bond.Analysis of the crystal packing of (I) shows that, at variance with isonicotinohydrazide (Bhat et al., 1974), for which the
is stabilized by a network of N—H···N hydrogen bonds, in compound (I) two of the three independent N—H bonds act as donor in three-centre N—H···O systems (Table 1, entries 2 and 3), and the third is involved in a N—H···N interaction (Table 1, entry 1). These hydrogen bonds delineate patterns in which rings are the most prominent features (Fig. 2). Two small rings with descriptor R22(10) (Etter et al., 1990; Bernstein et al., 1995; Motherwell et al., 1999) are then formed by NH2 functionalities and two symmetry-related carbonyl O atoms [O1ii and O1iii, symmetry codes: (ii) x + 1/2, -y + 1/2, -z; (iii) x - 1/2, -y + 1/2, -z]. The formation of the N—H···N hydrogen bonds between the N—H groups and the pyridyl N atoms [N1i, symmetry code: (i) -x + 1, y + 1/2, -z + 1/2] leads to the formation of larger R66(30) rings.The structure of the same compound has been determined independently and is reported in the preceding paper (Priebe al., 2008). For related literature, see: Bhat et al. (1974); Kutoglu & Scheringer (1983); Miwa et al. (1999); Portalone (2007); Portalone & Colapietro (2007). For computation of ring patterns formed by hydrogen bonds in the
see: Etter et al. (1990); Bernstein et al. (1995); Motherwell et al. (1999).Data collection: CrysAlis CCD (Oxford Diffraction, 2006); cell
CrysAlis CCD (Oxford Diffraction, 2006); data reduction: CrysAlis RED (Oxford Diffraction, 2006); program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: WinGX (Farrugia, 1999); software used to prepare material for publication: WinGX (Farrugia, 1999).C6H7N3O | F(000) = 288 |
Mr = 137.15 | Dx = 1.415 Mg m−3 |
Orthorhombic, P212121 | Mo Kα radiation, λ = 0.71069 Å |
Hall symbol: P 2ac 2ab | Cell parameters from 6060 reflections |
a = 3.8727 (10) Å | θ = 2.3–30.0° |
b = 10.481 (2) Å | µ = 0.10 mm−1 |
c = 15.855 (2) Å | T = 298 K |
V = 643.6 (2) Å3 | Plate, colourless |
Z = 4 | 0.15 × 0.05 × 0.05 mm |
Oxford Diffraction Xcalibur S CCD diffractometer | 695 reflections with I > 2σ(I) |
Radiation source: Enhance (Mo) X-ray source | Rint = 0.019 |
Graphite monochromator | θmax = 30.0°, θmin = 2.3° |
Detector resolution: 16.0696 pixels mm-1 | h = −5→5 |
ω and φ scans | k = −14→14 |
3076 measured reflections | l = −22→22 |
1139 independent reflections |
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)] = 0.042 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.131 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.19 | w = 1/[σ2(Fo2) + (0.022P)2 + 0.3733P] where P = (Fo2 + 2Fc2)/3 |
1139 reflections | (Δ/σ)max < 0.001 |
93 parameters | Δρmax = 0.22 e Å−3 |
0 restraints | Δρmin = −0.22 e Å−3 |
C6H7N3O | V = 643.6 (2) Å3 |
Mr = 137.15 | Z = 4 |
Orthorhombic, P212121 | Mo Kα radiation |
a = 3.8727 (10) Å | µ = 0.10 mm−1 |
b = 10.481 (2) Å | T = 298 K |
c = 15.855 (2) Å | 0.15 × 0.05 × 0.05 mm |
Oxford Diffraction Xcalibur S CCD diffractometer | 695 reflections with I > 2σ(I) |
3076 measured reflections | Rint = 0.019 |
1139 independent reflections |
R[F2 > 2σ(F2)] = 0.042 | 0 restraints |
wR(F2) = 0.131 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.19 | Δρmax = 0.22 e Å−3 |
1139 reflections | Δρmin = −0.22 e Å−3 |
93 parameters |
x | y | z | Uiso*/Ueq | ||
O1 | 1.0228 (9) | 0.1920 (2) | 0.10123 (15) | 0.0690 (8) | |
N1 | 0.4952 (10) | 0.1249 (3) | 0.32513 (17) | 0.0622 (8) | |
N2 | 0.8838 (10) | 0.4009 (3) | 0.10818 (16) | 0.0613 (9) | |
H21 | 0.777 (5) | 0.464 (3) | 0.1359 (12) | 0.074* | |
N3 | 0.9984 (11) | 0.4321 (3) | 0.02617 (17) | 0.0670 (9) | |
H31 | 1.210 (6) | 0.4151 (6) | 0.0228 (2) | 0.080* | |
H32 | 0.889 (3) | 0.3722 (18) | −0.0149 (13) | 0.080* | |
C2 | 0.6160 (10) | 0.1529 (3) | 0.2485 (2) | 0.0565 (9) | |
H2 | 0.5944 | 0.0902 | 0.2056 | 0.068* | |
C3 | 0.7709 (10) | 0.2678 (3) | 0.22785 (19) | 0.0517 (8) | |
C4 | 0.7961 (10) | 0.3597 (3) | 0.2905 (2) | 0.0574 (9) | |
H4 | 0.8954 | 0.4406 | 0.2786 | 0.069* | |
C5 | 0.6755 (12) | 0.3321 (3) | 0.3700 (2) | 0.0648 (11) | |
H5 | 0.6931 | 0.3932 | 0.4140 | 0.078* | |
C6 | 0.5291 (13) | 0.2149 (4) | 0.3845 (2) | 0.0673 (10) | |
H6 | 0.4474 | 0.1966 | 0.4397 | 0.081* | |
C7 | 0.9030 (11) | 0.2833 (3) | 0.14019 (19) | 0.0545 (8) |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.089 (2) | 0.0590 (14) | 0.0593 (13) | 0.0139 (16) | 0.0077 (16) | −0.0061 (11) |
N1 | 0.075 (2) | 0.0528 (15) | 0.0586 (15) | −0.0012 (19) | 0.0015 (17) | 0.0083 (13) |
N2 | 0.083 (2) | 0.0536 (15) | 0.0468 (13) | 0.0037 (17) | 0.0062 (16) | 0.0023 (12) |
N3 | 0.083 (2) | 0.0649 (17) | 0.0526 (14) | −0.004 (2) | 0.0038 (18) | 0.0066 (13) |
C2 | 0.071 (2) | 0.0457 (15) | 0.0528 (16) | 0.0009 (18) | −0.0027 (18) | 0.0009 (13) |
C3 | 0.062 (2) | 0.0440 (14) | 0.0496 (15) | 0.0019 (17) | −0.0038 (16) | −0.0007 (13) |
C4 | 0.071 (2) | 0.0475 (16) | 0.0535 (16) | 0.0034 (19) | −0.0040 (18) | −0.0040 (14) |
C5 | 0.089 (3) | 0.0574 (18) | 0.0480 (16) | 0.004 (2) | −0.004 (2) | −0.0041 (14) |
C6 | 0.083 (3) | 0.066 (2) | 0.0526 (17) | 0.005 (2) | 0.002 (2) | 0.0060 (16) |
C7 | 0.063 (2) | 0.0497 (15) | 0.0505 (15) | 0.0023 (18) | −0.0032 (17) | −0.0014 (14) |
O1—C7 | 1.230 (4) | C2—H2 | 0.9500 |
N1—C2 | 1.334 (4) | C3—C4 | 1.387 (4) |
N1—C6 | 1.340 (4) | C3—C7 | 1.490 (4) |
N2—C7 | 1.335 (4) | C4—C5 | 1.375 (4) |
N2—N3 | 1.412 (4) | C4—H4 | 0.9500 |
N2—H21 | 0.89 (4) | C5—C6 | 1.373 (5) |
N3—H31 | 0.84 (5) | C5—H5 | 0.9500 |
N3—H32 | 1.00 (5) | C6—H6 | 0.9500 |
C2—C3 | 1.385 (4) | ||
C2—N1—C6 | 116.8 (3) | C5—C4—C3 | 119.1 (3) |
C7—N2—N3 | 123.1 (3) | C5—C4—H4 | 120.5 |
C7—N2—H21 | 121.2 | C3—C4—H4 | 120.5 |
N3—N2—H21 | 115.4 | C6—C5—C4 | 118.9 (3) |
N2—N3—H31 | 108.4 | C6—C5—H5 | 120.6 |
N2—N3—H32 | 108.7 | C4—C5—H5 | 120.6 |
H31—N3—H32 | 103.9 | N1—C6—C5 | 123.5 (3) |
N1—C2—C3 | 124.0 (3) | N1—C6—H6 | 118.2 |
N1—C2—H2 | 118.0 | C5—C6—H6 | 118.2 |
C3—C2—H2 | 118.0 | O1—C7—N2 | 123.2 (3) |
C2—C3—C4 | 117.7 (3) | O1—C7—C3 | 120.9 (3) |
C2—C3—C7 | 117.6 (3) | N2—C7—C3 | 115.8 (3) |
C4—C3—C7 | 124.6 (3) | ||
C6—N1—C2—C3 | 0.0 (6) | C4—C5—C6—N1 | −0.3 (7) |
N1—C2—C3—C4 | −1.1 (6) | N3—N2—C7—O1 | 0.2 (7) |
N1—C2—C3—C7 | 178.1 (4) | N3—N2—C7—C3 | 179.8 (4) |
C2—C3—C4—C5 | 1.5 (6) | C2—C3—C7—O1 | −33.7 (6) |
C7—C3—C4—C5 | −177.6 (4) | C4—C3—C7—O1 | 145.5 (4) |
C3—C4—C5—C6 | −0.9 (6) | C2—C3—C7—N2 | 146.7 (4) |
C2—N1—C6—C5 | 0.7 (7) | C4—C3—C7—N2 | −34.2 (6) |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H21···N1i | 0.89 (4) | 2.09 (4) | 2.964 (4) | 168 (4) |
N3—H31···O1ii | 0.84 (5) | 2.57 (5) | 3.146 (4) | 127 (4) |
N3—H32···O1iii | 1.00 (5) | 2.08 (5) | 3.027 (4) | 157 (4) |
Symmetry codes: (i) −x+1, y+1/2, −z+1/2; (ii) x+1/2, −y+1/2, −z; (iii) x−1/2, −y+1/2, −z. |
Experimental details
Crystal data | |
Chemical formula | C6H7N3O |
Mr | 137.15 |
Crystal system, space group | Orthorhombic, P212121 |
Temperature (K) | 298 |
a, b, c (Å) | 3.8727 (10), 10.481 (2), 15.855 (2) |
V (Å3) | 643.6 (2) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.10 |
Crystal size (mm) | 0.15 × 0.05 × 0.05 |
Data collection | |
Diffractometer | Oxford Diffraction Xcalibur S CCD |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 3076, 1139, 695 |
Rint | 0.019 |
(sin θ/λ)max (Å−1) | 0.704 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.042, 0.131, 1.19 |
No. of reflections | 1139 |
No. of parameters | 93 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.22, −0.22 |
Computer programs: CrysAlis CCD (Oxford Diffraction, 2006), CrysAlis RED (Oxford Diffraction, 2006), SIR97 (Altomare et al., 1999), SHELXL97 (Sheldrick, 1997), WinGX (Farrugia, 1999).
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H21···N1i | 0.89 (4) | 2.09 (4) | 2.964 (4) | 168 (4) |
N3—H31···O1ii | 0.84 (5) | 2.57 (5) | 3.146 (4) | 127 (4) |
N3—H32···O1iii | 1.00 (5) | 2.08 (5) | 3.027 (4) | 157 (4) |
Symmetry codes: (i) −x+1, y+1/2, −z+1/2; (ii) x+1/2, −y+1/2, −z; (iii) x−1/2, −y+1/2, −z. |
Acknowledgements
We thank MIUR (Rome) for 2006 financial support of the project `X-ray diffractometry and spectrometry'.
References
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As a part of a more general study of multiple-hydrogen-bonding N -heterocyclic systems as potential supramolecular reagents (Portalone, 2007; Portalone & Colapietro, 2007), we report here the structure of the title compound (I, Fig. 1). The asymmetric unit of (I) comprises one independent molecule, and the angle between the mean planes of the acid hydrazine group and the pyridine ring is 34.0 (2)°. Noteworthy, in contrast to nicotinic acid (Kutoglu & Scheringer, 1983) and nicotinamide (Miwa et al., 1999), the C?O bond is oriented cis with respect to the C2—C3 bond.
Analysis of the crystal packing of (I) shows that, at variance with isonicotinohydrazide (Bhat et al., 1974), for which the crystal structure is stabilized by a network of N—H···N hydrogen bonds, in compound (I) two of the three independent N—H bonds act as donor in three-centre N—H···O systems (Table 1, entries 2 and 3), and the third is involved in a N—H···N interaction (Table 1, entry 1). These hydrogen bonds delineate patterns in which rings are the most prominent features (Fig. 2). Two small rings with descriptor R22(10) (Etter et al., 1990; Bernstein et al., 1995; Motherwell et al., 1999) are then formed by NH2 functionalities and two symmetry-related carbonyl O atoms [O1ii and O1iii, symmetry codes: (ii) x + 1/2, -y + 1/2, -z; (iii) x - 1/2, -y + 1/2, -z]. The formation of the N—H···N hydrogen bonds between the N—H groups and the pyridyl N atoms [N1i, symmetry code: (i) -x + 1, y + 1/2, -z + 1/2] leads to the formation of larger R66(30) rings.