organic compounds
(2E)-2-Benzylidene-N-phenylhydrazinecarboxamide
aDepartment of Chemistry, Mahatma Gandhi College, Thiruvananthapuram 695 004, Kerala, India, bDepartment of Chemistry, Faculty of Science, Eastern University, Sri Lanka, Chenkalady, Sri Lanka, cDepartment of Chemistry, All Saints College, Thiruvananthapuram 695 007, Kerala, India, and dDepartment of Chemistry, Sree Narayana College, Chempazhanthy, Thiruvananthapuram 695 587, Kerala, India
*Correspondence e-mail: eesans@yahoo.com
The molecule of the title compound, C14H13N3O, adopts an E conformation with respect to the azomethine C=N bond, and is roughly planar, with an r.m.s. deviation of the non-H atoms from the least-squares plane of 0.100 (2) Å and a dihedral angle between the terminal benzene rings of 5.74 (12)°. An intramolecular N—H⋯N hydrogen bond closes an S(6) ring. In the crystal, molecules are linked by the pairs of N—H⋯O hydrogen bonds into centrosymmetric dimers. Dimers related by translation along [010] form slanted stacks, the shortest C⋯C intermolecular distance within the stack being 3.283 (3) Å. Weak C—H⋯π interactions link the stacks into a three-dimensional structure.
CCDC reference: 997059
Related literature
For the synthesis of related compounds, see: Siji et al. (2010). For biological applications of hydrazinecarboxamide and its derivatives, see: Rivadeneira et al. (2009); Shalini et al. (2009). For related structures, see: Annie et al. (2012); Aravindakshan et al. (2013).
Experimental
Crystal data
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Data collection: APEX2 (Bruker, 2004); cell SAINT (Bruker, 2004); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012) and Mercury (Macrae et al., 2008); software used to prepare material for publication: SHELXL97 and publCIF (Westrip, 2010).
Supporting information
CCDC reference: 997059
10.1107/S1600536814008344/yk2104sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536814008344/yk2104Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536814008344/yk2104Isup3.cml
The title compound was prepared by adapting a reported procedure (Siji et al., 2010). Hot methanolic solutions (25 ml) of equimolar amounts of benzaldehyde (0.106 g, 1 mmol) and N-phenylhydrazinecarboxamide (0.151 g, 1 mmol) were mixed and refluxed for 3 h after adding a few drops of dilute acetic acid. The resulting solution was cooled to room temperature. The colourless block shaped crystals were collected, washed with few drops of methanol and dried over P4O10 in vacuo. Single crystals suitable for X-ray analysis were obtained by slow evaporation of solution in air for few days.
IR (KBr, υ in cm-1): 3356, 2959, 1684, 1540, 1024. 1H NMR (400 MHz, CDCl3, δ, p.p.m.): 9.51 (s, 1H), 8.13 (s, 1H), 7.85 (s, 1H), 7.09–7.58 (m, 5H), 7.09–7.67 (m, 10H). 13C NMR (400 MHz, CDCl3, δ, p.p.m.): 153.61, 141.78, 137.84, 133.66, 130.02, 129.02, 128.79, 126.94, 123.54, 119.68.
All H atoms on C were placed in calculated positions, guided by difference maps, with C—H bond distances of 0.93 Å. H atoms were assigned Uiso(H) values of 1.2Ueq(carrier). H atoms of N3—H3' and N2—H2' bonds were located from difference maps and the bond distances are restrained to 0.88±0.01 Å.
Data collection: APEX2 (Bruker, 2004); cell
SAINT (Bruker, 2004); data reduction: SAINT (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012) and Mercury (Macrae et al., 2008); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008) and publCIF (Westrip, 2010).Fig. 1. ORTEP view of the compound, drawn with 50% probability displacement ellipsoids for the non-H atoms. | |
Fig. 2. Centrosymmetric dimer formed by pair of hydrogen bonds in the title compound. | |
Fig. 3. C—H···π interaction in the title compound. | |
Fig. 4. A view of the unit cell along b axis. |
C14H13N3O | F(000) = 504 |
Mr = 239.27 | Dx = 1.230 Mg m−3 |
Monoclinic, P2/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yc | Cell parameters from 3449 reflections |
a = 13.6308 (14) Å | θ = 2.7–25.1° |
b = 5.4023 (5) Å | µ = 0.08 mm−1 |
c = 17.5751 (19) Å | T = 296 K |
β = 93.065 (4)° | Block, colourless |
V = 1292.3 (2) Å3 | 0.29 × 0.24 × 0.21 mm |
Z = 4 |
Bruker APEXII CCD area-detector diffractometer | 2302 independent reflections |
Radiation source: fine-focus sealed tube | 1655 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.023 |
Detector resolution: 8.33 pixels mm-1 | θmax = 25.1°, θmin = 2.3° |
ϕ and ω scans | h = −16→16 |
Absorption correction: multi-scan (SADABS; Bruker, 2004) | k = −6→6 |
Tmin = 0.977, Tmax = 0.983 | l = −20→20 |
9857 measured 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)] = 0.044 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.146 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | w = 1/[σ2(Fo2) + (0.0686P)2 + 0.3096P] where P = (Fo2 + 2Fc2)/3 |
2300 reflections | (Δ/σ)max < 0.001 |
171 parameters | Δρmax = 0.19 e Å−3 |
2 restraints | Δρmin = −0.14 e Å−3 |
C14H13N3O | V = 1292.3 (2) Å3 |
Mr = 239.27 | Z = 4 |
Monoclinic, P2/c | Mo Kα radiation |
a = 13.6308 (14) Å | µ = 0.08 mm−1 |
b = 5.4023 (5) Å | T = 296 K |
c = 17.5751 (19) Å | 0.29 × 0.24 × 0.21 mm |
β = 93.065 (4)° |
Bruker APEXII CCD area-detector diffractometer | 2302 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2004) | 1655 reflections with I > 2σ(I) |
Tmin = 0.977, Tmax = 0.983 | Rint = 0.023 |
9857 measured reflections |
R[F2 > 2σ(F2)] = 0.044 | 2 restraints |
wR(F2) = 0.146 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | Δρmax = 0.19 e Å−3 |
2300 reflections | Δρmin = −0.14 e Å−3 |
171 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 | ||
O1 | 0.12555 (9) | −0.4737 (3) | 0.03527 (9) | 0.0743 (4) | |
N1 | −0.03540 (11) | −0.0322 (3) | 0.10278 (9) | 0.0613 (4) | |
N2 | −0.00160 (11) | −0.2374 (3) | 0.06671 (10) | 0.0678 (5) | |
N3 | 0.15497 (11) | −0.1014 (3) | 0.09396 (10) | 0.0642 (4) | |
C1 | −0.12124 (15) | 0.3641 (4) | 0.18518 (12) | 0.0718 (6) | |
H1 | −0.0535 | 0.3456 | 0.1924 | 0.086* | |
C2 | −0.1678 (2) | 0.5526 (4) | 0.22135 (14) | 0.0879 (7) | |
H2 | −0.1315 | 0.6601 | 0.2532 | 0.105* | |
C3 | −0.2675 (2) | 0.5831 (5) | 0.21077 (16) | 0.0924 (8) | |
H3 | −0.2989 | 0.7108 | 0.2353 | 0.111* | |
C4 | −0.32004 (18) | 0.4260 (5) | 0.16432 (16) | 0.0885 (7) | |
H4 | −0.3875 | 0.4474 | 0.1567 | 0.106* | |
C5 | −0.27437 (14) | 0.2354 (4) | 0.12843 (12) | 0.0735 (6) | |
H5 | −0.3114 | 0.1278 | 0.0972 | 0.088* | |
C6 | −0.17410 (13) | 0.2018 (3) | 0.13822 (10) | 0.0585 (5) | |
C7 | −0.12822 (13) | −0.0028 (4) | 0.09942 (11) | 0.0605 (5) | |
H7 | −0.1677 | −0.1145 | 0.0715 | 0.073* | |
C8 | 0.09629 (13) | −0.2821 (4) | 0.06361 (11) | 0.0596 (5) | |
C9 | 0.25809 (13) | −0.0996 (3) | 0.10287 (11) | 0.0593 (5) | |
C10 | 0.29986 (15) | 0.0908 (4) | 0.14580 (15) | 0.0811 (7) | |
H10 | 0.2601 | 0.2115 | 0.1659 | 0.097* | |
C11 | 0.40000 (17) | 0.1028 (5) | 0.15888 (18) | 0.0985 (8) | |
H11 | 0.4275 | 0.2300 | 0.1886 | 0.118* | |
C12 | 0.45930 (17) | −0.0700 (5) | 0.12867 (19) | 0.1017 (9) | |
H12 | 0.5271 | −0.0598 | 0.1370 | 0.122* | |
C13 | 0.41822 (16) | −0.2588 (5) | 0.08601 (17) | 0.0977 (8) | |
H13 | 0.4587 | −0.3768 | 0.0653 | 0.117* | |
C14 | 0.31741 (14) | −0.2772 (4) | 0.07315 (13) | 0.0773 (6) | |
H14 | 0.2901 | −0.4079 | 0.0448 | 0.093* | |
H2' | −0.0434 (12) | −0.336 (3) | 0.0420 (11) | 0.075 (6)* | |
H3' | 0.1243 (14) | 0.026 (3) | 0.1121 (12) | 0.078 (7)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0593 (8) | 0.0682 (9) | 0.0949 (11) | 0.0025 (6) | −0.0021 (7) | −0.0228 (7) |
N1 | 0.0535 (9) | 0.0662 (10) | 0.0646 (10) | −0.0012 (7) | 0.0064 (7) | −0.0066 (7) |
N2 | 0.0501 (9) | 0.0714 (11) | 0.0820 (11) | −0.0038 (8) | 0.0036 (8) | −0.0216 (9) |
N3 | 0.0520 (9) | 0.0623 (10) | 0.0776 (11) | 0.0030 (7) | −0.0022 (7) | −0.0141 (8) |
C1 | 0.0687 (12) | 0.0747 (14) | 0.0718 (13) | 0.0010 (10) | 0.0009 (10) | −0.0056 (10) |
C2 | 0.112 (2) | 0.0756 (15) | 0.0759 (15) | −0.0007 (13) | 0.0062 (13) | −0.0110 (12) |
C3 | 0.112 (2) | 0.0763 (15) | 0.0919 (18) | 0.0256 (14) | 0.0291 (15) | 0.0068 (13) |
C4 | 0.0737 (14) | 0.0932 (17) | 0.0995 (18) | 0.0234 (13) | 0.0137 (13) | 0.0107 (14) |
C5 | 0.0582 (11) | 0.0841 (15) | 0.0783 (14) | 0.0038 (10) | 0.0046 (10) | 0.0023 (11) |
C6 | 0.0564 (10) | 0.0630 (11) | 0.0566 (11) | −0.0001 (8) | 0.0072 (8) | 0.0048 (9) |
C7 | 0.0528 (10) | 0.0684 (12) | 0.0603 (11) | −0.0057 (8) | 0.0018 (8) | −0.0053 (9) |
C8 | 0.0532 (10) | 0.0630 (11) | 0.0623 (11) | −0.0005 (9) | 0.0009 (8) | −0.0040 (9) |
C9 | 0.0517 (10) | 0.0605 (11) | 0.0651 (11) | 0.0007 (8) | −0.0017 (8) | 0.0039 (9) |
C10 | 0.0625 (12) | 0.0685 (13) | 0.1114 (18) | −0.0038 (10) | −0.0036 (11) | −0.0131 (12) |
C11 | 0.0678 (14) | 0.0837 (16) | 0.142 (2) | −0.0114 (12) | −0.0128 (14) | −0.0153 (15) |
C12 | 0.0534 (12) | 0.0997 (19) | 0.151 (3) | −0.0060 (13) | −0.0056 (14) | −0.0021 (17) |
C13 | 0.0603 (13) | 0.1020 (19) | 0.131 (2) | 0.0146 (13) | 0.0054 (13) | −0.0146 (16) |
C14 | 0.0589 (11) | 0.0817 (14) | 0.0909 (15) | 0.0045 (10) | 0.0001 (10) | −0.0161 (12) |
O1—C8 | 1.225 (2) | C4—H4 | 0.9300 |
N1—C7 | 1.273 (2) | C5—C6 | 1.380 (3) |
N1—N2 | 1.369 (2) | C5—H5 | 0.9300 |
N2—C8 | 1.360 (2) | C6—C7 | 1.457 (3) |
N2—H2' | 0.877 (9) | C7—H7 | 0.9300 |
N3—C8 | 1.353 (2) | C9—C14 | 1.376 (3) |
N3—C9 | 1.406 (2) | C9—C10 | 1.380 (3) |
N3—H3' | 0.876 (9) | C10—C11 | 1.373 (3) |
C1—C2 | 1.374 (3) | C10—H10 | 0.9300 |
C1—C6 | 1.380 (3) | C11—C12 | 1.361 (4) |
C1—H1 | 0.9300 | C11—H11 | 0.9300 |
C2—C3 | 1.373 (4) | C12—C13 | 1.368 (4) |
C2—H2 | 0.9300 | C12—H12 | 0.9300 |
C3—C4 | 1.355 (4) | C13—C14 | 1.384 (3) |
C3—H3 | 0.9300 | C13—H13 | 0.9300 |
C4—C5 | 1.374 (3) | C14—H14 | 0.9300 |
C7—N1—N2 | 115.97 (15) | N1—C7—C6 | 121.55 (17) |
C8—N2—N1 | 121.18 (15) | N1—C7—H7 | 119.2 |
C8—N2—H2' | 119.0 (13) | C6—C7—H7 | 119.2 |
N1—N2—H2' | 119.7 (13) | O1—C8—N3 | 124.84 (16) |
C8—N3—C9 | 127.98 (16) | O1—C8—N2 | 120.54 (16) |
C8—N3—H3' | 115.4 (14) | N3—C8—N2 | 114.62 (17) |
C9—N3—H3' | 116.6 (14) | C14—C9—C10 | 119.58 (18) |
C2—C1—C6 | 120.6 (2) | C14—C9—N3 | 123.85 (17) |
C2—C1—H1 | 119.7 | C10—C9—N3 | 116.54 (17) |
C6—C1—H1 | 119.7 | C11—C10—C9 | 120.2 (2) |
C3—C2—C1 | 120.3 (2) | C11—C10—H10 | 119.9 |
C3—C2—H2 | 119.8 | C9—C10—H10 | 119.9 |
C1—C2—H2 | 119.8 | C12—C11—C10 | 120.5 (2) |
C4—C3—C2 | 119.6 (2) | C12—C11—H11 | 119.7 |
C4—C3—H3 | 120.2 | C10—C11—H11 | 119.7 |
C2—C3—H3 | 120.2 | C11—C12—C13 | 119.4 (2) |
C3—C4—C5 | 120.6 (2) | C11—C12—H12 | 120.3 |
C3—C4—H4 | 119.7 | C13—C12—H12 | 120.3 |
C5—C4—H4 | 119.7 | C12—C13—C14 | 121.1 (2) |
C4—C5—C6 | 120.7 (2) | C12—C13—H13 | 119.4 |
C4—C5—H5 | 119.6 | C14—C13—H13 | 119.4 |
C6—C5—H5 | 119.6 | C9—C14—C13 | 119.1 (2) |
C1—C6—C5 | 118.23 (19) | C9—C14—H14 | 120.4 |
C1—C6—C7 | 122.55 (17) | C13—C14—H14 | 120.4 |
C5—C6—C7 | 119.22 (18) | ||
C7—N1—N2—C8 | 177.05 (17) | C9—N3—C8—N2 | 176.29 (18) |
C6—C1—C2—C3 | −0.5 (3) | N1—N2—C8—O1 | 175.52 (17) |
C1—C2—C3—C4 | −0.1 (4) | N1—N2—C8—N3 | −4.3 (3) |
C2—C3—C4—C5 | 0.7 (4) | C8—N3—C9—C14 | 7.8 (3) |
C3—C4—C5—C6 | −0.8 (3) | C8—N3—C9—C10 | −170.6 (2) |
C2—C1—C6—C5 | 0.4 (3) | C14—C9—C10—C11 | −0.1 (4) |
C2—C1—C6—C7 | −179.21 (19) | N3—C9—C10—C11 | 178.4 (2) |
C4—C5—C6—C1 | 0.2 (3) | C9—C10—C11—C12 | 1.2 (4) |
C4—C5—C6—C7 | 179.83 (18) | C10—C11—C12—C13 | −1.1 (5) |
N2—N1—C7—C6 | 177.24 (16) | C11—C12—C13—C14 | −0.1 (4) |
C1—C6—C7—N1 | −4.9 (3) | C10—C9—C14—C13 | −1.0 (3) |
C5—C6—C7—N1 | 175.51 (18) | N3—C9—C14—C13 | −179.4 (2) |
C9—N3—C8—O1 | −3.5 (3) | C12—C13—C14—C9 | 1.1 (4) |
Cg1 is the centroid of the C9–C14 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3′···N1 | 0.88 (1) | 2.20 (2) | 2.634 (2) | 110 (2) |
N2—H2′···O1i | 0.88 (1) | 2.00 (1) | 2.860 (2) | 167 (2) |
C3—H3···Cg1ii | 0.93 | 2.99 | 3.800 (3) | 146 |
Symmetry codes: (i) −x, −y−1, −z; (ii) −x, y+1, −z+1/2. |
Cg1 is the centroid of the C9–C14 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3'···N1 | 0.876 (9) | 2.20 (2) | 2.634 (2) | 110.4 (16) |
N2—H2'···O1i | 0.877 (9) | 1.999 (11) | 2.860 (2) | 167.0 (19) |
C3—H3···Cg1ii | 0.93 | 2.99 | 3.800 (3) | 146 |
Symmetry codes: (i) −x, −y−1, −z; (ii) −x, y+1, −z+1/2. |
Acknowledgements
We thank the Indian Institute for Science Education and Research (IISER), Thiruvananthapuram, for the diffraction measurements. LSR thanks the CSIR, New Delhi, for the award of a Junior Research Fellowship.
References
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Hydrazinecarboxamides with versatile structural features are good ligands for both the neutral and anionic complexes (Rivadeneira et al., 2009). The aryl hydrazinecarboxamides were found to be devoid of sedative hypnotic activity and exhibited anticonvulsant activity with less neurotoxicity (Shalini et al., 2009).
The title compound (Scheme 1, Fig. 1) crystallizes in the monoclinic space group P2/c. The molecule adopts an E configuration with respect to C7═N1 bond and the N3–C8–N2–N1 torsion angle of 4.3 (3)° reveals that N1 and N3 atoms are cis to each other with respect to C8—N2 bond. The central fragment N3–C8(O1)–N2–N1 is almost planar and forms diherdal angles with two benzene rings of 13.24 (11)° (C1—C6) and of 7.60 (12)° (C9—C14).
The C7—N1 (1.273 (2) Å) and C8—O1 (1.225 (2) Å) bond distances are very close to the reported bond lengths of azomethine and keto groups, respectively, in similar structures (Annie et al., 2012), confirming the azomethine bond formation and existence of semicarbazone in amido form. A five-membered ring is formed by N1/N2/C8/N3 and H3' through an intramolecular H-bonding interaction with a D···A distance of 2.634 Å. In the crystal, a centrosymmetric dimer (Aravindakshan et al., 2013) is formed by means of a classical intermolecular N—H···O hydrogen bond (Fig. 2) with a D···A distance of 2.860 (2) Å. A C—H···π interaction (Fig. 3) is present in the crystal between the hydrogen attached to the carbon C3 and the C9—C14 benzene ring with H···π distance of 2.99 Å, interconnects the adjacent centrosymmetric dimers to build a three-dimensional supramolecular architecture in the system. Fig. 4 shows the packing diagram of the title compound along b axis.