organic compounds
(2E)-2-[(2-Hydroxy-4-methoxyphenyl)(phenyl)methylidene]-N-phenylhydrazinecarboxamide dimethylformamide monosolvate
aDepartment of Applied Chemistry, Cochin University of Science and Technology, Kochi 682 022, India, and bDepartment of Chemistry, Faculty of Science, Eastern University, Sri Lanka, Chenkalady, Sri Lanka
*Correspondence e-mail: eesans@yahoo.com
The title compound, C21H19N3O3·C3H7NO, adopts an E conformation with respect to the azomethine bond and crystallizes in the amide form. The dihedral angle between the rings lined to the C=N bond is 88.60 (12)°. The dimethylformamide solvent molecule is disordered over two orientations with site occupancies of 0.684 (3) and 0.316 (3). The two N atoms of the hydrazinecarboxamide group are involved in intermolecular N—H⋯O hydrogen bonds in which the dimethylformamide O atom acts as acceptor. The structure also features π–π interactions, with a centroid–centroid distance of 3.6561 (13) Å. Classical and non-classical intramolecular O—H⋯N and C—H⋯O hydrogen bonds are also present.
Related literature
For applications of hydrazinecarboxamide and its derivatives, see: Afrasiabi et al. (2005); Alam et al. (2010). For related structures, see: Siji et al. (2010); Reena & Kurup (2010); Sithambaresan & Kurup (2011). For standard bond-length data, see: March (1992); Kala et al. (2007). For the synthesis, see: Sreekanth et al. (2004).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2004); cell APEX2 and SAINT (Bruker, 2004); data reduction: SAINT and XPREP (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 2010); software used to prepare material for publication: SHELXL97 and publCIF (Westrip, 2010).
Supporting information
10.1107/S1600536812017382/bv2201sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536812017382/bv2201Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536812017382/bv2201Isup3.cml
The title compound was prepared by adapting a reported procedure (Sreekanth et al., 2004). To a warm methanolic solution of N-phenylsemicarbazide (0.302 g, 2 mmol), a methanolic solution of 2-hydroxy-4-methoxybenzophenone (0.456 g, 2 mmol) was added and the resulting solution was refluxed for 2 h after adding a drop of conc. HCl. On cooling the solution colorless crystals were separated out. Single crystals suitable for X-ray diffraction studies were obtained by slow evaporation of its solution in a 1:1 mixture of methanol and DMF.
All H atoms on C were placed in calculated positions, guided by difference maps, with C–H bond distances 0.93–0.97 Å. H atoms were assigned as Uiso=1.2Ueq (1.5 for Me). N2–H2', N3–H3' and O1–H1 H atoms were located from difference maps and restrained using DFIX instructions. All the C, N and O atoms of the dimethylformamide molecule are disordered over two sites A and B with relative occupancies of 0.637 (4) and 0.363 (4) respectively..
Data collection: APEX2 (Bruker, 2004); cell
APEX2 and SAINT (Bruker, 2004); data reduction: SAINT and XPREP (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 2010); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008) and publCIF (Westrip, 2010).Fig. 1. The molecular structure of the title compound, showing the disordered DMF solvent molecule. | |
Fig. 2. A view of the unit cell along c axis. |
C21H19N3O3·C3H7NO | F(000) = 920 |
Mr = 434.49 | Dx = 1.254 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 5896 reflections |
a = 13.1155 (7) Å | θ = 2.4–28.2° |
b = 16.9619 (11) Å | µ = 0.09 mm−1 |
c = 10.7399 (5) Å | T = 296 K |
β = 105.509 (3)° | Block, colourless |
V = 2302.2 (2) Å3 | 0.35 × 0.30 × 0.25 mm |
Z = 4 |
Bruker Kappa APEXII CCD diffractometer | 4061 independent reflections |
Radiation source: fine-focus sealed tube | 2875 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.069 |
ω and ϕ scan | θmax = 25.0°, θmin = 2.3° |
Absorption correction: multi-scan (SADABS; Bruker, 2004) | h = −15→15 |
Tmin = 0.970, Tmax = 0.978 | k = −19→20 |
17400 measured reflections | l = −12→12 |
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)] = 0.052 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.158 | H-atom parameters constrained |
S = 1.02 | w = 1/[σ2(Fo2) + (0.0824P)2 + 0.2581P] where P = (Fo2 + 2Fc2)/3 |
4061 reflections | (Δ/σ)max < 0.001 |
311 parameters | Δρmax = 0.18 e Å−3 |
10 restraints | Δρmin = −0.19 e Å−3 |
C21H19N3O3·C3H7NO | V = 2302.2 (2) Å3 |
Mr = 434.49 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 13.1155 (7) Å | µ = 0.09 mm−1 |
b = 16.9619 (11) Å | T = 296 K |
c = 10.7399 (5) Å | 0.35 × 0.30 × 0.25 mm |
β = 105.509 (3)° |
Bruker Kappa APEXII CCD diffractometer | 4061 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2004) | 2875 reflections with I > 2σ(I) |
Tmin = 0.970, Tmax = 0.978 | Rint = 0.069 |
17400 measured reflections |
R[F2 > 2σ(F2)] = 0.052 | 10 restraints |
wR(F2) = 0.158 | H-atom parameters constrained |
S = 1.02 | Δρmax = 0.18 e Å−3 |
4061 reflections | Δρmin = −0.19 e Å−3 |
311 parameters |
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. |
x | y | z | Uiso*/Ueq | Occ. (<1) | |
O1 | 0.84998 (10) | 0.61778 (8) | 1.04160 (12) | 0.0666 (4) | |
H1 | 0.7974 | 0.6191 | 0.9700 | 0.100* | |
O2 | 1.21655 (11) | 0.59166 (9) | 1.18461 (13) | 0.0740 (4) | |
O3 | 0.57307 (11) | 0.63119 (10) | 0.84928 (12) | 0.0826 (5) | |
N1 | 0.75944 (12) | 0.61397 (9) | 0.79832 (14) | 0.0588 (4) | |
N2 | 0.66741 (12) | 0.61639 (10) | 0.70205 (14) | 0.0655 (5) | |
H2' | 0.6700 | 0.6187 | 0.6222 | 0.079* | |
N3 | 0.48988 (12) | 0.63420 (11) | 0.63350 (14) | 0.0663 (5) | |
H3' | 0.5040 | 0.6304 | 0.5610 | 0.080* | |
C1 | 0.94202 (14) | 0.60977 (10) | 1.00767 (16) | 0.0520 (4) | |
C2 | 1.03416 (15) | 0.60499 (11) | 1.10594 (16) | 0.0581 (5) | |
H2 | 1.0311 | 0.6074 | 1.1914 | 0.070* | |
C3 | 1.13084 (14) | 0.59664 (11) | 1.07944 (17) | 0.0559 (4) | |
C4 | 1.13607 (15) | 0.59357 (12) | 0.95264 (17) | 0.0609 (5) | |
H4 | 1.2009 | 0.5881 | 0.9338 | 0.073* | |
C5 | 1.04372 (14) | 0.59881 (11) | 0.85454 (17) | 0.0575 (5) | |
H5 | 1.0479 | 0.5971 | 0.7695 | 0.069* | |
C6 | 0.94474 (13) | 0.60652 (10) | 0.87711 (15) | 0.0496 (4) | |
C7 | 0.84867 (14) | 0.60951 (10) | 0.76958 (16) | 0.0509 (4) | |
C8 | 0.57499 (15) | 0.62767 (12) | 0.73737 (17) | 0.0590 (5) | |
C9 | 0.38600 (14) | 0.65561 (11) | 0.63201 (16) | 0.0561 (5) | |
C10 | 0.35631 (16) | 0.68054 (13) | 0.73941 (19) | 0.0705 (6) | |
H10 | 0.4059 | 0.6834 | 0.8194 | 0.085* | |
C11 | 0.25230 (18) | 0.70127 (14) | 0.7270 (2) | 0.0804 (6) | |
H11 | 0.2324 | 0.7176 | 0.7998 | 0.097* | |
C12 | 0.17775 (17) | 0.69846 (14) | 0.6102 (2) | 0.0794 (6) | |
H12 | 0.1080 | 0.7128 | 0.6036 | 0.095* | |
C13 | 0.20729 (17) | 0.67438 (15) | 0.5040 (2) | 0.0811 (6) | |
H13 | 0.1576 | 0.6724 | 0.4240 | 0.097* | |
C14 | 0.31036 (16) | 0.65306 (14) | 0.51496 (19) | 0.0722 (6) | |
H14 | 0.3295 | 0.6365 | 0.4418 | 0.087* | |
C15 | 0.85612 (14) | 0.60722 (11) | 0.63283 (16) | 0.0527 (4) | |
C16 | 0.85331 (16) | 0.53656 (13) | 0.57021 (17) | 0.0710 (6) | |
H16 | 0.8457 | 0.4899 | 0.6124 | 0.085* | |
C17 | 0.86165 (18) | 0.53419 (16) | 0.4453 (2) | 0.0847 (7) | |
H17 | 0.8602 | 0.4861 | 0.4033 | 0.102* | |
C18 | 0.87206 (17) | 0.60280 (18) | 0.3829 (2) | 0.0831 (7) | |
H18 | 0.8780 | 0.6014 | 0.2986 | 0.100* | |
C19 | 0.87374 (19) | 0.67305 (17) | 0.4443 (2) | 0.0896 (7) | |
H19 | 0.8803 | 0.7196 | 0.4012 | 0.108* | |
C20 | 0.86589 (17) | 0.67617 (14) | 0.56947 (19) | 0.0748 (6) | |
H20 | 0.8672 | 0.7245 | 0.6109 | 0.090* | |
C21 | 1.31791 (17) | 0.58519 (18) | 1.1620 (2) | 0.0898 (7) | |
H21A | 1.3203 | 0.5388 | 1.1116 | 0.135* | |
H21B | 1.3708 | 0.5815 | 1.2431 | 0.135* | |
H21C | 1.3312 | 0.6309 | 1.1160 | 0.135* | |
O4A | 0.5772 (14) | 0.6210 (6) | 0.4203 (10) | 0.100 (2) | 0.684 (3) |
N4A | 0.6036 (4) | 0.59304 (18) | 0.2263 (4) | 0.0615 (10) | 0.684 (3) |
C22A | 0.5958 (2) | 0.5725 (2) | 0.3396 (3) | 0.0780 (9) | 0.684 (3) |
H22A | 0.6043 | 0.5196 | 0.3627 | 0.094* | 0.684 (3) |
C23A | 0.6011 (5) | 0.6733 (3) | 0.1866 (5) | 0.1115 (15) | 0.684 (3) |
H23A | 0.5797 | 0.7059 | 0.2481 | 0.167* | 0.684 (3) |
H23B | 0.5517 | 0.6791 | 0.1032 | 0.167* | 0.684 (3) |
H23C | 0.6703 | 0.6888 | 0.1818 | 0.167* | 0.684 (3) |
C24A | 0.6284 (3) | 0.5357 (2) | 0.1380 (4) | 0.0957 (11) | 0.684 (3) |
H24A | 0.6188 | 0.4834 | 0.1672 | 0.144* | 0.684 (3) |
H24B | 0.7005 | 0.5423 | 0.1356 | 0.144* | 0.684 (3) |
H24C | 0.5822 | 0.5435 | 0.0530 | 0.144* | 0.684 (3) |
O4B | 0.576 (3) | 0.5968 (15) | 0.421 (2) | 0.100 (2) | 0.316 (3) |
N4B | 0.6081 (12) | 0.6247 (6) | 0.2322 (10) | 0.0615 (10) | 0.316 (3) |
C22B | 0.5949 (5) | 0.6475 (5) | 0.3420 (6) | 0.0780 (9) | 0.316 (3) |
H22B | 0.5990 | 0.7008 | 0.3633 | 0.094* | 0.316 (3) |
C23B | 0.6333 (13) | 0.6804 (8) | 0.1434 (12) | 0.1115 (15) | 0.316 (3) |
H23D | 0.6241 | 0.7331 | 0.1712 | 0.167* | 0.316 (3) |
H23E | 0.5872 | 0.6720 | 0.0586 | 0.167* | 0.316 (3) |
H23F | 0.7054 | 0.6731 | 0.1413 | 0.167* | 0.316 (3) |
C24B | 0.5982 (9) | 0.5433 (6) | 0.1957 (9) | 0.0957 (11) | 0.316 (3) |
H24D | 0.5607 | 0.5157 | 0.2478 | 0.144* | 0.316 (3) |
H24E | 0.6673 | 0.5207 | 0.2085 | 0.144* | 0.316 (3) |
H24F | 0.5599 | 0.5390 | 0.1062 | 0.144* | 0.316 (3) |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0586 (8) | 0.0987 (11) | 0.0499 (7) | 0.0052 (6) | 0.0275 (6) | −0.0003 (6) |
O2 | 0.0609 (8) | 0.1036 (11) | 0.0558 (8) | 0.0070 (7) | 0.0124 (6) | 0.0008 (7) |
O3 | 0.0688 (9) | 0.1380 (14) | 0.0465 (8) | 0.0131 (8) | 0.0250 (6) | 0.0061 (7) |
N1 | 0.0527 (9) | 0.0780 (11) | 0.0483 (8) | 0.0002 (7) | 0.0181 (7) | −0.0024 (7) |
N2 | 0.0509 (9) | 0.1028 (13) | 0.0464 (8) | 0.0032 (8) | 0.0191 (7) | −0.0020 (7) |
N3 | 0.0544 (9) | 0.1032 (13) | 0.0464 (8) | 0.0042 (8) | 0.0224 (7) | −0.0056 (8) |
C1 | 0.0570 (10) | 0.0564 (11) | 0.0489 (9) | −0.0002 (8) | 0.0249 (8) | −0.0001 (7) |
C2 | 0.0648 (12) | 0.0707 (12) | 0.0426 (9) | 0.0019 (9) | 0.0208 (8) | 0.0010 (8) |
C3 | 0.0565 (11) | 0.0599 (11) | 0.0506 (10) | 0.0009 (8) | 0.0132 (8) | 0.0013 (8) |
C4 | 0.0533 (11) | 0.0763 (13) | 0.0577 (11) | 0.0004 (9) | 0.0230 (9) | −0.0020 (9) |
C5 | 0.0578 (11) | 0.0731 (13) | 0.0466 (9) | −0.0014 (9) | 0.0224 (8) | −0.0018 (8) |
C6 | 0.0557 (10) | 0.0525 (10) | 0.0446 (9) | −0.0014 (8) | 0.0204 (8) | −0.0013 (7) |
C7 | 0.0552 (10) | 0.0554 (10) | 0.0468 (9) | 0.0004 (8) | 0.0216 (8) | −0.0019 (7) |
C8 | 0.0562 (11) | 0.0774 (13) | 0.0483 (10) | 0.0011 (9) | 0.0224 (8) | 0.0005 (8) |
C9 | 0.0541 (10) | 0.0655 (12) | 0.0545 (10) | −0.0016 (8) | 0.0245 (8) | −0.0001 (8) |
C10 | 0.0660 (12) | 0.0894 (15) | 0.0636 (12) | 0.0022 (10) | 0.0301 (10) | −0.0071 (10) |
C11 | 0.0787 (15) | 0.0872 (16) | 0.0902 (15) | 0.0045 (12) | 0.0481 (13) | −0.0083 (12) |
C12 | 0.0601 (13) | 0.0776 (15) | 0.1070 (18) | 0.0068 (11) | 0.0335 (13) | 0.0089 (12) |
C13 | 0.0610 (13) | 0.0981 (18) | 0.0811 (14) | 0.0040 (11) | 0.0138 (11) | 0.0091 (12) |
C14 | 0.0657 (13) | 0.0950 (16) | 0.0576 (11) | 0.0047 (11) | 0.0197 (10) | 0.0009 (10) |
C15 | 0.0483 (9) | 0.0676 (12) | 0.0453 (9) | 0.0019 (8) | 0.0180 (7) | −0.0003 (8) |
C16 | 0.0888 (15) | 0.0769 (14) | 0.0508 (10) | 0.0136 (11) | 0.0248 (10) | 0.0000 (9) |
C17 | 0.0972 (17) | 0.1058 (19) | 0.0559 (12) | 0.0201 (14) | 0.0286 (11) | −0.0127 (12) |
C18 | 0.0656 (13) | 0.142 (2) | 0.0486 (11) | −0.0003 (13) | 0.0267 (10) | 0.0035 (13) |
C19 | 0.0954 (17) | 0.113 (2) | 0.0636 (13) | −0.0207 (14) | 0.0274 (12) | 0.0217 (13) |
C20 | 0.0877 (15) | 0.0799 (15) | 0.0613 (12) | −0.0139 (11) | 0.0276 (10) | 0.0036 (10) |
C21 | 0.0567 (13) | 0.134 (2) | 0.0743 (14) | 0.0100 (13) | 0.0106 (10) | −0.0093 (13) |
O4A | 0.0932 (13) | 0.156 (7) | 0.0592 (9) | 0.019 (6) | 0.0347 (9) | −0.010 (3) |
N4A | 0.0719 (13) | 0.064 (3) | 0.0525 (11) | −0.004 (3) | 0.0242 (10) | −0.004 (2) |
C22A | 0.0719 (17) | 0.115 (3) | 0.0520 (14) | 0.0056 (19) | 0.0260 (13) | 0.0029 (17) |
C23A | 0.146 (5) | 0.099 (3) | 0.099 (4) | 0.018 (3) | 0.048 (3) | 0.018 (3) |
C24A | 0.122 (3) | 0.103 (3) | 0.073 (2) | −0.008 (2) | 0.045 (2) | −0.022 (2) |
O4B | 0.0932 (13) | 0.156 (7) | 0.0592 (9) | 0.019 (6) | 0.0347 (9) | −0.010 (3) |
N4B | 0.0719 (13) | 0.064 (3) | 0.0525 (11) | −0.004 (3) | 0.0242 (10) | −0.004 (2) |
C22B | 0.0719 (17) | 0.115 (3) | 0.0520 (14) | 0.0056 (19) | 0.0260 (13) | 0.0029 (17) |
C23B | 0.146 (5) | 0.099 (3) | 0.099 (4) | 0.018 (3) | 0.048 (3) | 0.018 (3) |
C24B | 0.122 (3) | 0.103 (3) | 0.073 (2) | −0.008 (2) | 0.045 (2) | −0.022 (2) |
O1—C1 | 1.3579 (19) | C15—C20 | 1.376 (3) |
O1—H1 | 0.8851 | C16—C17 | 1.376 (3) |
O2—C3 | 1.367 (2) | C16—H16 | 0.9300 |
O2—C21 | 1.418 (2) | C17—C18 | 1.368 (3) |
O3—C8 | 1.210 (2) | C17—H17 | 0.9300 |
N1—C7 | 1.290 (2) | C18—C19 | 1.359 (4) |
N1—N2 | 1.364 (2) | C18—H18 | 0.9300 |
N2—C8 | 1.377 (2) | C19—C20 | 1.376 (3) |
N2—H2' | 0.8683 | C19—H19 | 0.9300 |
N3—C8 | 1.355 (2) | C20—H20 | 0.9300 |
N3—C9 | 1.406 (2) | C21—H21A | 0.9600 |
N3—H3' | 0.8495 | C21—H21B | 0.9600 |
C1—C2 | 1.378 (3) | C21—H21C | 0.9600 |
C1—C6 | 1.413 (2) | O4A—C22A | 1.265 (10) |
C2—C3 | 1.379 (2) | N4A—C22A | 1.295 (4) |
C2—H2 | 0.9300 | N4A—C23A | 1.424 (6) |
C3—C4 | 1.383 (2) | N4A—C24A | 1.455 (5) |
C4—C5 | 1.379 (3) | C22A—H22A | 0.9300 |
C4—H4 | 0.9300 | C23A—H23A | 0.9600 |
C5—C6 | 1.389 (2) | C23A—H23B | 0.9600 |
C5—H5 | 0.9300 | C23A—H23C | 0.9600 |
C6—C7 | 1.465 (2) | C24A—H24A | 0.9600 |
C7—C15 | 1.498 (2) | C24A—H24B | 0.9600 |
C9—C14 | 1.378 (3) | C24A—H24C | 0.9600 |
C9—C10 | 1.379 (2) | O4B—C22B | 1.274 (11) |
C10—C11 | 1.380 (3) | N4B—C22B | 1.295 (10) |
C10—H10 | 0.9300 | N4B—C24B | 1.432 (10) |
C11—C12 | 1.369 (3) | N4B—C23B | 1.442 (11) |
C11—H11 | 0.9300 | C22B—H22B | 0.9300 |
C12—C13 | 1.362 (3) | C23B—H23D | 0.9600 |
C12—H12 | 0.9300 | C23B—H23E | 0.9600 |
C13—C14 | 1.374 (3) | C23B—H23F | 0.9600 |
C13—H13 | 0.9300 | C24B—H24D | 0.9600 |
C14—H14 | 0.9300 | C24B—H24E | 0.9600 |
C15—C16 | 1.370 (3) | C24B—H24F | 0.9600 |
C1—O1—H1 | 108.1 | C9—C14—H14 | 119.3 |
C3—O2—C21 | 117.70 (15) | C16—C15—C20 | 119.64 (17) |
C7—N1—N2 | 119.74 (14) | C16—C15—C7 | 120.25 (16) |
N1—N2—C8 | 117.46 (14) | C20—C15—C7 | 120.11 (17) |
N1—N2—H2' | 119.3 | C15—C16—C17 | 120.4 (2) |
C8—N2—H2' | 122.4 | C15—C16—H16 | 119.8 |
C8—N3—C9 | 127.79 (14) | C17—C16—H16 | 119.8 |
C8—N3—H3' | 114.5 | C18—C17—C16 | 119.8 (2) |
C9—N3—H3' | 117.2 | C18—C17—H17 | 120.1 |
O1—C1—C2 | 117.44 (14) | C16—C17—H17 | 120.1 |
O1—C1—C6 | 122.02 (16) | C19—C18—C17 | 119.97 (19) |
C2—C1—C6 | 120.54 (15) | C19—C18—H18 | 120.0 |
C1—C2—C3 | 120.95 (15) | C17—C18—H18 | 120.0 |
C1—C2—H2 | 119.5 | C18—C19—C20 | 120.8 (2) |
C3—C2—H2 | 119.5 | C18—C19—H19 | 119.6 |
O2—C3—C2 | 115.74 (15) | C20—C19—H19 | 119.6 |
O2—C3—C4 | 124.42 (16) | C15—C20—C19 | 119.4 (2) |
C2—C3—C4 | 119.85 (17) | C15—C20—H20 | 120.3 |
C5—C4—C3 | 119.02 (16) | C19—C20—H20 | 120.3 |
C5—C4—H4 | 120.5 | O2—C21—H21A | 109.5 |
C3—C4—H4 | 120.5 | O2—C21—H21B | 109.5 |
C4—C5—C6 | 122.93 (15) | H21A—C21—H21B | 109.5 |
C4—C5—H5 | 118.5 | O2—C21—H21C | 109.5 |
C6—C5—H5 | 118.5 | H21A—C21—H21C | 109.5 |
C5—C6—C1 | 116.71 (16) | H21B—C21—H21C | 109.5 |
C5—C6—C7 | 120.84 (14) | C22A—N4A—C23A | 122.5 (4) |
C1—C6—C7 | 122.44 (15) | C22A—N4A—C24A | 121.3 (3) |
N1—C7—C6 | 117.22 (14) | C23A—N4A—C24A | 115.8 (4) |
N1—C7—C15 | 122.50 (15) | O4A—C22A—N4A | 123.1 (5) |
C6—C7—C15 | 120.28 (14) | O4A—C22A—H22A | 118.4 |
O3—C8—N3 | 125.60 (16) | N4A—C22A—H22A | 118.4 |
O3—C8—N2 | 122.28 (17) | C22B—N4B—C24B | 120.9 (10) |
N3—C8—N2 | 112.12 (14) | C22B—N4B—C23B | 121.1 (9) |
C14—C9—C10 | 118.51 (17) | C24B—N4B—C23B | 118.0 (9) |
C14—C9—N3 | 117.47 (15) | O4B—C22B—N4B | 119.8 (14) |
C10—C9—N3 | 124.01 (17) | O4B—C22B—H22B | 120.1 |
C9—C10—C11 | 119.4 (2) | N4B—C22B—H22B | 120.1 |
C9—C10—H10 | 120.3 | N4B—C23B—H23D | 109.5 |
C11—C10—H10 | 120.3 | N4B—C23B—H23E | 109.5 |
C12—C11—C10 | 121.66 (19) | H23D—C23B—H23E | 109.5 |
C12—C11—H11 | 119.2 | N4B—C23B—H23F | 109.5 |
C10—C11—H11 | 119.2 | H23D—C23B—H23F | 109.5 |
C13—C12—C11 | 118.96 (19) | H23E—C23B—H23F | 109.5 |
C13—C12—H12 | 120.5 | N4B—C24B—H24D | 109.5 |
C11—C12—H12 | 120.5 | N4B—C24B—H24E | 109.5 |
C12—C13—C14 | 120.1 (2) | H24D—C24B—H24E | 109.5 |
C12—C13—H13 | 120.0 | N4B—C24B—H24F | 109.5 |
C14—C13—H13 | 120.0 | H24D—C24B—H24F | 109.5 |
C13—C14—C9 | 121.45 (18) | H24E—C24B—H24F | 109.5 |
C13—C14—H14 | 119.3 | ||
C7—N1—N2—C8 | −174.78 (16) | C8—N3—C9—C14 | −175.6 (2) |
O1—C1—C2—C3 | 179.87 (16) | C8—N3—C9—C10 | 5.9 (3) |
C6—C1—C2—C3 | −0.3 (3) | C14—C9—C10—C11 | 0.7 (3) |
C21—O2—C3—C2 | −178.32 (18) | N3—C9—C10—C11 | 179.1 (2) |
C21—O2—C3—C4 | 1.9 (3) | C9—C10—C11—C12 | −0.6 (3) |
C1—C2—C3—O2 | −179.31 (16) | C10—C11—C12—C13 | 0.2 (4) |
C1—C2—C3—C4 | 0.5 (3) | C11—C12—C13—C14 | 0.3 (4) |
O2—C3—C4—C5 | 179.65 (17) | C12—C13—C14—C9 | −0.2 (4) |
C2—C3—C4—C5 | −0.1 (3) | C10—C9—C14—C13 | −0.3 (3) |
C3—C4—C5—C6 | −0.5 (3) | N3—C9—C14—C13 | −178.8 (2) |
C4—C5—C6—C1 | 0.7 (3) | N1—C7—C15—C16 | −89.3 (2) |
C4—C5—C6—C7 | −178.17 (17) | C6—C7—C15—C16 | 90.6 (2) |
O1—C1—C6—C5 | 179.55 (16) | N1—C7—C15—C20 | 90.7 (2) |
C2—C1—C6—C5 | −0.3 (2) | C6—C7—C15—C20 | −89.4 (2) |
O1—C1—C6—C7 | −1.6 (3) | C20—C15—C16—C17 | 0.9 (3) |
C2—C1—C6—C7 | 178.53 (17) | C7—C15—C16—C17 | −179.07 (18) |
N2—N1—C7—C6 | −179.56 (15) | C15—C16—C17—C18 | −0.5 (3) |
N2—N1—C7—C15 | 0.3 (3) | C16—C17—C18—C19 | −0.2 (4) |
C5—C6—C7—N1 | 177.65 (16) | C17—C18—C19—C20 | 0.5 (4) |
C1—C6—C7—N1 | −1.2 (2) | C16—C15—C20—C19 | −0.6 (3) |
C5—C6—C7—C15 | −2.2 (3) | C7—C15—C20—C19 | 179.34 (19) |
C1—C6—C7—C15 | 178.97 (15) | C18—C19—C20—C15 | −0.1 (3) |
C9—N3—C8—O3 | 8.5 (3) | C23A—N4A—C22A—O4A | 5.7 (12) |
C9—N3—C8—N2 | −171.40 (18) | C24A—N4A—C22A—O4A | 178.0 (10) |
N1—N2—C8—O3 | −3.9 (3) | C24B—N4B—C22B—O4B | 2 (3) |
N1—N2—C8—N3 | 175.94 (16) | C23B—N4B—C22B—O4B | −178 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···N1 | 0.89 | 1.78 | 2.5655 (18) | 147 |
N2—H2′···O4A | 0.87 | 2.19 | 2.941 (12) | 145 |
N2—H2′···O4B | 0.87 | 2.22 | 2.96 (3) | 143 |
N3—H3′···O4A | 0.85 | 2.00 | 2.830 (7) | 165 |
N3—H3′···O4B | 0.85 | 2.07 | 2.882 (18) | 161 |
C24A—H24C···O3i | 0.96 | 2.62 | 3.400 (4) | 139 |
C23B—H23E···O3i | 0.96 | 2.31 | 3.157 (13) | 147 |
C23B—H23F···O1i | 0.96 | 2.59 | 3.473 (13) | 153 |
Symmetry code: (i) x, y, z−1. |
Experimental details
Crystal data | |
Chemical formula | C21H19N3O3·C3H7NO |
Mr | 434.49 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 296 |
a, b, c (Å) | 13.1155 (7), 16.9619 (11), 10.7399 (5) |
β (°) | 105.509 (3) |
V (Å3) | 2302.2 (2) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.35 × 0.30 × 0.25 |
Data collection | |
Diffractometer | Bruker Kappa APEXII CCD diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2004) |
Tmin, Tmax | 0.970, 0.978 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 17400, 4061, 2875 |
Rint | 0.069 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.052, 0.158, 1.02 |
No. of reflections | 4061 |
No. of parameters | 311 |
No. of restraints | 10 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.18, −0.19 |
Computer programs: APEX2 (Bruker, 2004), APEX2 and SAINT (Bruker, 2004), SAINT and XPREP (Bruker, 2004), SHELXS97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 2010), SHELXL97 (Sheldrick, 2008) and publCIF (Westrip, 2010).
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···N1 | 0.89 | 1.78 | 2.5655 (18) | 146.8 |
N2—H2'···O4A | 0.87 | 2.19 | 2.941 (12) | 145.4 |
N2—H2'···O4B | 0.87 | 2.22 | 2.96 (3) | 143.1 |
N3—H3'···O4A | 0.85 | 2.00 | 2.830 (7) | 164.6 |
N3—H3'···O4B | 0.85 | 2.07 | 2.882 (18) | 161.0 |
C24A—H24C···O3i | 0.96 | 2.62 | 3.400 (4) | 138.5 |
C23B—H23E···O3i | 0.96 | 2.31 | 3.157 (13) | 146.5 |
C23B—H23F···O1i | 0.96 | 2.59 | 3.473 (13) | 153.0 |
Symmetry code: (i) x, y, z−1. |
Acknowledgements
CFA is grateful to the University Grants Commission, New Delhi, India, for the award of Teacher Fellowship. JMJ thanks the Council of Scientific and Industrial Research, New Delhi, India, for financial support in the form of a Senior Research Fellowship. The authors are grateful to the Sophisticated Analytical Instruments Facility, Cochin University of Science and Technology, Kochi-22, India, for providing the single-crystal X-ray diffraction data.
References
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
Semicarbazones are compounds with versatile structural features (Siji et al., 2010) and exhibit a wide range of bioactivities including anticancer (Afrasiabi et al., 2005) and antiviral properties. Some of them are found to exhibit anticonvulsant activity with less neurotoxicity (Alam et al., 2010).
The compound crystallizes in monoclinic P21/c space group. The molecule exists in the E configuration with respect to C7=N1 bond (Sithambaresan and Kurup, 2011) which is confirmed by the torsion angle of -179.56 (15)° of N2—N1—C7—C6 moiety (Fig. 1). The torsion angle value of -3.9 (3)° corresponding to N1—N2—C8—O3 moiety supports the cis configuration of the O3 atom with respect to the nitrogen atom N1. Also the torsion angles of -1.6 (3)° and -1.2 (3)° for O1—C1—C6—C7 and C1—C6—C7—N1 moieties respectively confirm the cis configuration of phenolic oxygen O1 and azomethine nitrogen N1 and it favors intramolecular hydrogen bonding between N1 and H attached to O1.
The C7–N1 bond distance [1.290 (2) Å] is in conformity with a formal C=N bond [1.28 Å] (March, 1992) confirming the azomethine bond formation. The existence of semicarbazone in the amido form in the solid state is confirmed by the observed bond length of 1.210 (2) Å for C8–O3 bond which is identical to a formal C=O bond length [1.21 Å] (Kala et al., 2007). The N1–N2 and N2–C8 bond distances of 1.364 (2) Å and 1.377 (2) Å respectively are greater than that for a double bond and less than that for a single bond which indicate appreciable delocalization of π-electron density over the semicarbazone chain (Reena & Kurup, 2010). Rings Cg1ii (comprising atoms C1—C6) and Cg2iii (comprising atoms C9—C14) make a dihedral angle of 14.43 (12)° with each other while rings Cg1ii and Cg3iv (comprising atoms C15—C20) are twisted away from each other by a dihedral angle of 88.60 (12)° [symmetry codes: (ii)1 - x,1 - y,1 - z; (iii)1 + x,3/2 - y,1/2 + z; (iv)x,3/2 - y,1/2 + z]. The dimethylformamide solvent molecule is disordered with site occupancies of 0.684 (3) and 0.316 (3).
Fig. 2 shows the packing diagram of the title compound along c axis. The nitrogen atoms, N2 and N3 of the hydrazine carboxamide moiety form classical intermolecular hydrogen bonds N2–H2'···O4i and N3–H3'···O4i respectively in which oxygen atom of the solvent dimethylformamide functions as acceptor and two non classical intramolecular hydrogen bonding interactions also found in the molecule and the DMFsolvent (Table 1). A prominent π···π interaction is observed with a centroid-centroid distance of 3.6561 (13) Å between the Cg1ii rings of two molecules. Other short ring interactions are weak as they correspond to a distance greater than 4 Å. Two types of C–H···π interactions with H···π distances of 3.3114 and 3.3197 Å are also present in the crystal system.