organic compounds
(2E)-N′-[(E)-4-Chlorobenzylidene]-3-phenylprop-2-enohydrazide monohydrate
aFioCruz-Fundação Oswaldo Cruz, Instituto de Tecnologia em Fármacos-Farmanguinhos, Rua Sizenando Nabuco, 100, Manguinhos, 21041-250 Rio de Janeiro, RJ, Brazil, bPrograma de Pós-Graduação em Química, Instituto de Química, Universidade Federal do Rio de Janeiro, 21949-900 Rio de Janeiro, RJ, Brazil, cLaboratório de Avaliação e Síntese de Substâncias Bioativas, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, PO Box 68023, 21941-902 Rio de Janeiro, RJ, Brazil, dCHEMSOL, 1 Harcourt Road, Aberdeen AB15 5NY, Scotland, eCentro de Desenvolvimento Tecnológico em Saúde (CDTS), Fundação Oswaldo Cruz (FIOCRUZ), Casa Amarela, Campus de Manguinhos, Av. Brasil 4365, 21040-900 Rio de Janeiro, RJ, Brazil, and fDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
*Correspondence e-mail: edward.tiekink@gmail.com
The conformation about each of the imine and ethene bonds in the title hydrazide hydrate, C16H13ClN2O·H2O, is E. The hydrazide molecule is approximately planar (r.m.s. deviation of the 20 non-H atoms = 0.172 Å). The most significant twist occurs about the ethene bond [C—C=C—C = 164.1 (5)°] and the dihedral angle formed between the benzene rings is 5.3 (2)°]. In the crystal, the presence of N—H⋯Ow and O—H⋯Oc (× 2; w = water and c = carbonyl) hydrogen bonds leads to a supramolecular array in the bc plane.
Related literature
For background to the resurgence of tuberculosis; see Bezerra et al. (2006); Chung & Shin (2007); Naz et al. (2006). For background to the biological activity of trans-cinnamic acid derivatives, see: Carvalho et al. (2008). For background to the development of hydrazide derivatives for biological evaluation, see: Carvalho et al. (2008, 2009).
Experimental
Crystal data
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Refinement
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Data collection: COLLECT (Hooft, 1998); cell DENZO (Otwinowski & Minor, 1997) and COLLECT; data reduction: DENZO and COLLECT; 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, 2006); software used to prepare material for publication: publCIF (Westrip, 2010).
Supporting information
https://doi.org/10.1107/S160053681003388X/hb5594sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S160053681003388X/hb5594Isup2.hkl
The title compound was obtained from the reaction between PhCH═CHC(═ O)NHNH2 and 4-chlorobenzaldehyde in ethanol. The mixture was stirred at room temperature for 30 min, when extensive precipitation was observed. The mixture was poured onto cold water and then neutralized with 10% aqueous sodium bicarbonate solution. The sample for X-ray was grown from its EtOH solution to yield colourless blocks of (I); yield 87%, m.pt. 484.3 K. 1H NMR (500.00 MHz, DMSO-d6) δ: 6.72 (1H, d, J = 16.0 Hz), 7.44 (3H, m), 7.53 (2H, d, J = 8.0 Hz), 7.65 (2H, m), 7.79 (3H, m), 8.06 and 8.25 (1H, s, syn / anti-E isomer), 11.61 and 11.77 (1H, s, syn / anti-E isomer) p.p.m.. 13C NMR (125 MHz, DMSO-d6) δ: 116.91, 120.04, 127.67, 128.16, 128.50, 128.64, 128.79, 128.85, 128.92, 129.82, 129.96, 133.04, 133.17, 134.09, 134.36, 134.52, 134.67, 140.65, 141.82, 142.19, 145.27, 161.38, 165.96 p.p.m.
The C-bound H atoms were geometrically placed (C–H = 0.95 Å) and refined as riding with Uiso(H) = 1.2Ueq(C). The O– and N-bound H atoms were located from a difference map and refined with the distance restraint O–H = 0.84 ± 0.01 and N–H = 0.86±0.01 Å, and with Uiso(H) = zUeq(carrier atom); z = 1.5 for O and z = 1.2 for N.
Tuberculosis (TB) remains among the world's great public health challenges. Worldwide resurgence of TB is due to two major problems: the AIDS epidemic, which started in the mid-1980's, and the outbreak of multi-drug resistant (MDR) TB (Bezerra et al., 2006; Chung & Shin 2007; Naz et al., 2006). In connection with on-going studies designed to generate novel therapeutic anti-malarial agents, we recently described a new class of isonicotinic and benzoic acid N'-(3-phenyl-acryloyl)hydrazide derivatives as attractive anti-tubercular agents (Carvalho et al., 2008). Allied with these investigations are structural studies: the structure of N'-[(2E)-3-phenylprop-2-enoyl]benzohydrazide was recently reported by us (Carvalho et al., 2009). We have synthesized for biological study a series of PhCH═CHCONHN═CHC6H4X compounds and now we report the crystal and molecular structure of one of these (1: X = Cl).
The ═C10 bond as seen in the value of the C9–C10–C11–C12 torsion angle of 164.1 (5) °. The conformation about the imine [N1═C7 = 1.283 (6) Å] and ethene [C9═C10 = 1.328 (7) Å] bonds is E in each case.
of (I) comprises the hydrazide molecule and a water molecule of crystallization. Despite there being twists in the molecule of (I), Fig. 1, the r.m.s. deviation of the 20 non-hydrogen atoms is 0.172 Å [max. and min. deviations = 0.284 (4) for atom N2 and -0.362 (1) Å for the Cl atom]. The dihedral angle formed between the peripheral benzene rings is 5.3 (2) °. The major twist in the molecule occurs about the C9The N2–H atom forms a hydrogen bond with the water molecule of crystallization and each O–H forms a hydrogen bond to a symmetry related amide-O, Table 1. The result of the hydrogen bonding is the formation of a supramolecular array in the bc plane, Fig. 2, and these stack along the a axis, Fig. 3.
For background to the resurgence of tuberculosis; see Bezerra et al. (2006); Chung & Shin (2007); Naz et al. (2006). For background to the biological activity of trans-cinnamic acid derivatives, see: Carvalho et al. (2008). For background to the development of hydrazide derivatives for biological evaluation, see: Carvalho et al. (2008, 2009).
Data collection: COLLECT (Hooft, 1998); cell
DENZO (Otwinowski & Minor, 1997) and COLLECT (Hooft, 1998); data reduction: DENZO (Otwinowski & Minor, 1997) and COLLECT (Hooft, 1998); 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, 2006); software used to prepare material for publication: publCIF (Westrip, 2010).C16H13ClN2O·H2O | F(000) = 632 |
Mr = 302.75 | Dx = 1.359 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 19841 reflections |
a = 34.078 (3) Å | θ = 2.9–27.5° |
b = 5.9824 (6) Å | µ = 0.26 mm−1 |
c = 7.2912 (6) Å | T = 120 K |
β = 95.674 (3)° | Block, colourless |
V = 1479.2 (2) Å3 | 0.10 × 0.08 × 0.03 mm |
Z = 4 |
Nonius KappaCCD diffractometer | 2572 independent reflections |
Radiation source: Enraf Nonius FR591 rotating anode | 2016 reflections with I > 2σ(I) |
10 cm confocal mirrors monochromator | Rint = 0.066 |
Detector resolution: 9.091 pixels mm-1 | θmax = 25.0°, θmin = 3.0° |
φ and ω scans | h = −40→39 |
Absorption correction: multi-scan (SADABS; Sheldrick, 2007) | k = −7→7 |
Tmin = 0.492, Tmax = 1.000 | l = −8→8 |
8532 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)] = 0.084 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.196 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.05 | w = 1/[σ2(Fo2) + (0.0421P)2 + 8.0472P] where P = (Fo2 + 2Fc2)/3 |
2572 reflections | (Δ/σ)max = 0.001 |
199 parameters | Δρmax = 0.36 e Å−3 |
4 restraints | Δρmin = −0.37 e Å−3 |
C16H13ClN2O·H2O | V = 1479.2 (2) Å3 |
Mr = 302.75 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 34.078 (3) Å | µ = 0.26 mm−1 |
b = 5.9824 (6) Å | T = 120 K |
c = 7.2912 (6) Å | 0.10 × 0.08 × 0.03 mm |
β = 95.674 (3)° |
Nonius KappaCCD diffractometer | 2572 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 2007) | 2016 reflections with I > 2σ(I) |
Tmin = 0.492, Tmax = 1.000 | Rint = 0.066 |
8532 measured reflections |
R[F2 > 2σ(F2)] = 0.084 | 4 restraints |
wR(F2) = 0.196 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.05 | Δρmax = 0.36 e Å−3 |
2572 reflections | Δρmin = −0.37 e Å−3 |
199 parameters |
Geometry. All s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in distances, angles and torsion angles; correlations between s.u.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell s.u.'s is used for estimating s.u.'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 > 2σ(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 | ||
Cl | 0.02800 (3) | −0.2977 (2) | 0.18849 (16) | 0.0315 (4) | |
O1 | 0.28173 (10) | −0.0171 (6) | 0.2229 (5) | 0.0330 (9) | |
N1 | 0.20834 (11) | 0.1523 (7) | 0.1857 (5) | 0.0280 (10) | |
N2 | 0.24086 (12) | 0.2830 (8) | 0.1657 (6) | 0.0299 (10) | |
H2N | 0.2398 (16) | 0.420 (3) | 0.129 (7) | 0.036* | |
C1 | 0.07011 (13) | −0.1339 (9) | 0.1827 (6) | 0.0240 (11) | |
C2 | 0.10625 (13) | −0.2220 (9) | 0.2528 (6) | 0.0238 (10) | |
H2 | 0.1074 | −0.3662 | 0.3077 | 0.029* | |
C3 | 0.14047 (13) | −0.1007 (8) | 0.2430 (6) | 0.0235 (11) | |
H3 | 0.1652 | −0.1615 | 0.2906 | 0.028* | |
C4 | 0.13869 (13) | 0.1134 (8) | 0.1623 (6) | 0.0221 (10) | |
C5 | 0.10192 (13) | 0.2008 (9) | 0.0959 (6) | 0.0239 (10) | |
H5 | 0.1004 | 0.3458 | 0.0425 | 0.029* | |
C6 | 0.06758 (13) | 0.0787 (9) | 0.1071 (6) | 0.0267 (11) | |
H6 | 0.0427 | 0.1401 | 0.0635 | 0.032* | |
C7 | 0.17447 (14) | 0.2426 (9) | 0.1444 (6) | 0.0260 (11) | |
H7 | 0.1727 | 0.3929 | 0.1023 | 0.031* | |
C8 | 0.27682 (14) | 0.1859 (9) | 0.1837 (6) | 0.0282 (11) | |
C9 | 0.30969 (14) | 0.3385 (9) | 0.1550 (6) | 0.0290 (11) | |
H9 | 0.3046 | 0.4928 | 0.1329 | 0.035* | |
C10 | 0.34638 (14) | 0.2621 (10) | 0.1598 (6) | 0.0296 (12) | |
H10 | 0.3503 | 0.1079 | 0.1869 | 0.036* | |
C11 | 0.38178 (14) | 0.3936 (9) | 0.1270 (6) | 0.0295 (12) | |
C12 | 0.41917 (14) | 0.3067 (10) | 0.1809 (7) | 0.0339 (12) | |
H12 | 0.4215 | 0.1632 | 0.2367 | 0.041* | |
C13 | 0.45299 (15) | 0.4277 (11) | 0.1540 (7) | 0.0388 (14) | |
H13 | 0.4783 | 0.3688 | 0.1935 | 0.047* | |
C14 | 0.44946 (15) | 0.6344 (11) | 0.0691 (7) | 0.0372 (14) | |
H14 | 0.4725 | 0.7163 | 0.0482 | 0.045* | |
C15 | 0.41234 (15) | 0.7235 (10) | 0.0140 (7) | 0.0342 (13) | |
H15 | 0.4102 | 0.8662 | −0.0433 | 0.041* | |
C16 | 0.37871 (14) | 0.6055 (9) | 0.0424 (6) | 0.0305 (12) | |
H16 | 0.3535 | 0.6670 | 0.0049 | 0.037* | |
O1W | 0.23087 (11) | 0.6983 (6) | −0.0131 (5) | 0.0349 (9) | |
H1W | 0.2424 (14) | 0.797 (8) | 0.055 (6) | 0.052* | |
H2W | 0.2444 (13) | 0.668 (9) | −0.101 (5) | 0.052* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cl | 0.0216 (6) | 0.0401 (8) | 0.0329 (6) | −0.0052 (6) | 0.0028 (5) | 0.0042 (6) |
O1 | 0.0311 (19) | 0.031 (2) | 0.037 (2) | −0.0030 (17) | 0.0035 (15) | 0.0053 (17) |
N1 | 0.025 (2) | 0.036 (3) | 0.023 (2) | −0.0076 (19) | 0.0022 (16) | 0.0007 (19) |
N2 | 0.025 (2) | 0.033 (3) | 0.032 (2) | −0.006 (2) | 0.0062 (17) | 0.002 (2) |
C1 | 0.019 (2) | 0.033 (3) | 0.021 (2) | −0.004 (2) | 0.0050 (18) | 0.001 (2) |
C2 | 0.025 (2) | 0.030 (3) | 0.016 (2) | −0.002 (2) | 0.0004 (18) | −0.001 (2) |
C3 | 0.022 (2) | 0.024 (3) | 0.024 (2) | 0.002 (2) | 0.0024 (19) | −0.004 (2) |
C4 | 0.022 (2) | 0.026 (3) | 0.019 (2) | 0.000 (2) | 0.0047 (18) | 0.001 (2) |
C5 | 0.028 (2) | 0.024 (3) | 0.020 (2) | 0.003 (2) | 0.0014 (18) | −0.004 (2) |
C6 | 0.021 (2) | 0.032 (3) | 0.028 (3) | 0.005 (2) | 0.0063 (19) | −0.001 (2) |
C7 | 0.027 (3) | 0.025 (3) | 0.027 (2) | −0.001 (2) | 0.006 (2) | 0.001 (2) |
C8 | 0.028 (3) | 0.034 (3) | 0.022 (2) | −0.005 (2) | 0.0005 (19) | −0.004 (2) |
C9 | 0.027 (3) | 0.030 (3) | 0.029 (2) | −0.008 (2) | 0.003 (2) | 0.002 (2) |
C10 | 0.029 (3) | 0.040 (3) | 0.019 (2) | 0.000 (2) | −0.0007 (19) | 0.001 (2) |
C11 | 0.022 (2) | 0.041 (3) | 0.025 (2) | 0.001 (2) | 0.0002 (19) | −0.001 (2) |
C12 | 0.030 (3) | 0.043 (3) | 0.029 (3) | −0.004 (3) | 0.004 (2) | 0.000 (3) |
C13 | 0.027 (3) | 0.062 (4) | 0.027 (3) | 0.003 (3) | 0.001 (2) | −0.006 (3) |
C14 | 0.027 (3) | 0.059 (4) | 0.027 (3) | −0.012 (3) | 0.006 (2) | −0.002 (3) |
C15 | 0.038 (3) | 0.039 (3) | 0.027 (3) | −0.008 (3) | 0.008 (2) | −0.004 (2) |
C16 | 0.025 (3) | 0.043 (3) | 0.022 (2) | −0.005 (2) | −0.0036 (19) | 0.000 (2) |
O1W | 0.040 (2) | 0.031 (2) | 0.034 (2) | −0.0018 (18) | 0.0060 (16) | −0.0059 (17) |
Cl—C1 | 1.742 (5) | C8—C9 | 1.476 (7) |
O1—C8 | 1.256 (6) | C9—C10 | 1.328 (7) |
N1—C7 | 1.283 (6) | C9—H9 | 0.9500 |
N1—N2 | 1.376 (6) | C10—C11 | 1.479 (7) |
N2—C8 | 1.351 (6) | C10—H10 | 0.9500 |
N2—H2N | 0.86 (2) | C11—C12 | 1.396 (7) |
C1—C6 | 1.385 (7) | C11—C16 | 1.409 (8) |
C1—C2 | 1.390 (6) | C12—C13 | 1.392 (7) |
C2—C3 | 1.381 (6) | C12—H12 | 0.9500 |
C2—H2 | 0.9500 | C13—C14 | 1.382 (8) |
C3—C4 | 1.408 (7) | C13—H13 | 0.9500 |
C3—H3 | 0.9500 | C14—C15 | 1.395 (7) |
C4—C5 | 1.399 (6) | C14—H14 | 0.9500 |
C4—C7 | 1.461 (6) | C15—C16 | 1.379 (7) |
C5—C6 | 1.389 (7) | C15—H15 | 0.9500 |
C5—H5 | 0.9500 | C16—H16 | 0.9500 |
C6—H6 | 0.9500 | O1W—H1W | 0.84 (5) |
C7—H7 | 0.9500 | O1W—H2W | 0.85 (4) |
C7—N1—N2 | 116.8 (4) | N2—C8—C9 | 114.5 (5) |
C8—N2—N1 | 118.5 (4) | C10—C9—C8 | 120.6 (5) |
C8—N2—H2N | 117 (4) | C10—C9—H9 | 119.7 |
N1—N2—H2N | 124 (4) | C8—C9—H9 | 119.7 |
C6—C1—C2 | 120.8 (4) | C9—C10—C11 | 126.4 (5) |
C6—C1—Cl | 120.5 (4) | C9—C10—H10 | 116.8 |
C2—C1—Cl | 118.7 (4) | C11—C10—H10 | 116.8 |
C3—C2—C1 | 120.2 (5) | C12—C11—C16 | 119.0 (5) |
C3—C2—H2 | 119.9 | C12—C11—C10 | 119.5 (5) |
C1—C2—H2 | 119.9 | C16—C11—C10 | 121.5 (4) |
C2—C3—C4 | 119.8 (4) | C13—C12—C11 | 120.8 (6) |
C2—C3—H3 | 120.1 | C13—C12—H12 | 119.6 |
C4—C3—H3 | 120.1 | C11—C12—H12 | 119.6 |
C5—C4—C3 | 119.0 (4) | C14—C13—C12 | 119.5 (5) |
C5—C4—C7 | 119.9 (4) | C14—C13—H13 | 120.3 |
C3—C4—C7 | 121.1 (4) | C12—C13—H13 | 120.3 |
C6—C5—C4 | 120.9 (5) | C13—C14—C15 | 120.5 (5) |
C6—C5—H5 | 119.5 | C13—C14—H14 | 119.8 |
C4—C5—H5 | 119.5 | C15—C14—H14 | 119.8 |
C1—C6—C5 | 119.1 (4) | C16—C15—C14 | 120.3 (5) |
C1—C6—H6 | 120.4 | C16—C15—H15 | 119.9 |
C5—C6—H6 | 120.4 | C14—C15—H15 | 119.9 |
N1—C7—C4 | 119.7 (5) | C15—C16—C11 | 120.0 (5) |
N1—C7—H7 | 120.1 | C15—C16—H16 | 120.0 |
C4—C7—H7 | 120.1 | C11—C16—H16 | 120.0 |
O1—C8—N2 | 122.5 (5) | H1W—O1W—H2W | 110 (3) |
O1—C8—C9 | 123.0 (5) | ||
C7—N1—N2—C8 | −171.2 (4) | N1—N2—C8—C9 | 178.4 (4) |
C6—C1—C2—C3 | −1.9 (7) | O1—C8—C9—C10 | 3.8 (7) |
Cl—C1—C2—C3 | 177.1 (3) | N2—C8—C9—C10 | −176.7 (4) |
C1—C2—C3—C4 | 0.2 (7) | C8—C9—C10—C11 | 177.7 (4) |
C2—C3—C4—C5 | 1.0 (6) | C9—C10—C11—C12 | 164.1 (5) |
C2—C3—C4—C7 | −177.9 (4) | C9—C10—C11—C16 | −15.9 (8) |
C3—C4—C5—C6 | −0.7 (6) | C16—C11—C12—C13 | 0.8 (7) |
C7—C4—C5—C6 | 178.3 (4) | C10—C11—C12—C13 | −179.2 (4) |
C2—C1—C6—C5 | 2.3 (7) | C11—C12—C13—C14 | −1.4 (8) |
Cl—C1—C6—C5 | −176.7 (3) | C12—C13—C14—C15 | 1.3 (8) |
C4—C5—C6—C1 | −1.0 (7) | C13—C14—C15—C16 | −0.5 (8) |
N2—N1—C7—C4 | 180.0 (4) | C14—C15—C16—C11 | −0.1 (7) |
C5—C4—C7—N1 | −172.0 (4) | C12—C11—C16—C15 | 0.0 (7) |
C3—C4—C7—N1 | 7.0 (7) | C10—C11—C16—C15 | 180.0 (4) |
N1—N2—C8—O1 | −2.0 (7) |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2n···O1w | 0.86 (2) | 1.97 (3) | 2.811 (6) | 165 (5) |
O1w—H1w···O1i | 0.84 (5) | 2.05 (5) | 2.877 (5) | 166 (4) |
O1w—H2w···O1ii | 0.85 (4) | 2.10 (4) | 2.923 (5) | 165 (5) |
Symmetry codes: (i) x, y+1, z; (ii) x, −y+1/2, z−1/2. |
Experimental details
Crystal data | |
Chemical formula | C16H13ClN2O·H2O |
Mr | 302.75 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 120 |
a, b, c (Å) | 34.078 (3), 5.9824 (6), 7.2912 (6) |
β (°) | 95.674 (3) |
V (Å3) | 1479.2 (2) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.26 |
Crystal size (mm) | 0.10 × 0.08 × 0.03 |
Data collection | |
Diffractometer | Nonius KappaCCD |
Absorption correction | Multi-scan (SADABS; Sheldrick, 2007) |
Tmin, Tmax | 0.492, 1.000 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 8532, 2572, 2016 |
Rint | 0.066 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.084, 0.196, 1.05 |
No. of reflections | 2572 |
No. of parameters | 199 |
No. of restraints | 4 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.36, −0.37 |
Computer programs: DENZO (Otwinowski & Minor, 1997) and COLLECT (Hooft, 1998), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 2006), publCIF (Westrip, 2010).
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2n···O1w | 0.86 (2) | 1.97 (3) | 2.811 (6) | 165 (5) |
O1w—H1w···O1i | 0.84 (5) | 2.05 (5) | 2.877 (5) | 166 (4) |
O1w—H2w···O1ii | 0.85 (4) | 2.10 (4) | 2.923 (5) | 165 (5) |
Symmetry codes: (i) x, y+1, z; (ii) x, −y+1/2, z−1/2. |
Footnotes
‡Additional correspondence author, e-mail: j.wardell@abdn.ac.uk.
Acknowledgements
The use of the EPSRC X-ray crystallographic service at the University of Southampton, England, and the valuable assistance of the staff there is gratefully acknowledged. JLW acknowledges support from CAPES (Brazil).
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Tuberculosis (TB) remains among the world's great public health challenges. Worldwide resurgence of TB is due to two major problems: the AIDS epidemic, which started in the mid-1980's, and the outbreak of multi-drug resistant (MDR) TB (Bezerra et al., 2006; Chung & Shin 2007; Naz et al., 2006). In connection with on-going studies designed to generate novel therapeutic anti-malarial agents, we recently described a new class of isonicotinic and benzoic acid N'-(3-phenyl-acryloyl)hydrazide derivatives as attractive anti-tubercular agents (Carvalho et al., 2008). Allied with these investigations are structural studies: the structure of N'-[(2E)-3-phenylprop-2-enoyl]benzohydrazide was recently reported by us (Carvalho et al., 2009). We have synthesized for biological study a series of PhCH═CHCONHN═CHC6H4X compounds and now we report the crystal and molecular structure of one of these (1: X = Cl).
The asymmetric unit of (I) comprises the hydrazide molecule and a water molecule of crystallization. Despite there being twists in the molecule of (I), Fig. 1, the r.m.s. deviation of the 20 non-hydrogen atoms is 0.172 Å [max. and min. deviations = 0.284 (4) for atom N2 and -0.362 (1) Å for the Cl atom]. The dihedral angle formed between the peripheral benzene rings is 5.3 (2) °. The major twist in the molecule occurs about the C9═C10 bond as seen in the value of the C9–C10–C11–C12 torsion angle of 164.1 (5) °. The conformation about the imine [N1═C7 = 1.283 (6) Å] and ethene [C9═C10 = 1.328 (7) Å] bonds is E in each case.
The N2–H atom forms a hydrogen bond with the water molecule of crystallization and each O–H forms a hydrogen bond to a symmetry related amide-O, Table 1. The result of the hydrogen bonding is the formation of a supramolecular array in the bc plane, Fig. 2, and these stack along the a axis, Fig. 3.