organic compounds
5-{[(E)-2-(4-Iodophenyl)hydrazinylidene]methyl}thiophene-2-carbaldehyde
aCHEMSOL, 1 Harcourt Road, Aberdeen AB15 5NY, Scotland, bDepartamento de Quimica, ICEx, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil, cDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia, and dCentro 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
*Correspondence e-mail: edward.tiekink@gmail.com
The title compound, C12H9IN2OS, has an overall U-shape, with a dihedral angle of 21.4 (3)° between the thiophene and benzene rings. In the crystal, supramolecular chains mediated by N—H⋯O hydrogen bonds are formed along the b-axis direction.
Related literature
For background to 2-substituted thiophenes, see: Campaigne (1984); Kleemann et al. (2006). For the antimycobacterial activity of 2-substituted thiophenes, see: Lourenço et al. (2007). For a related structure, see: Ferreira et al. (2009). For background to the production of mono-hydrazones by the reaction of arylhydrazines with arenedicarbaldehydes, see: Reuch & Heflet (1956); Vaysse & Pastour (1964); Butler et al. (1990); Glidewell et al. (2005); Low et al. (2006); Wardell et al. (2006).
Experimental
Crystal data
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Refinement
|
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/S1600536809055172/hb5284sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536809055172/hb5284Isup2.hkl
A solution of p-iodophenylhydrazine (117 mg, 0.5 mmol) in MeOH (10 ml) was slowly added to a solution of 2,5-thiophenedicarbaldehyde (70 mg, 0.5 mmol) in MeOH (5 ml) at room temperature. The reaction mixture was maintained at room temperature and the crystals, which slowly formed, were collected and recrystallized from MeOH, m.pt. 464–467 K (dec.). IR(KBr, cm-1): 1675 (C═O), 1593(C═N).
The C-bound H atoms were geometrically placed (C–H = 0.95 Å) and refined as riding with Uiso(H) = 1.2Ueq(C). The N–H atom was located in a difference map and refined with the distance restraint N–H = 0.88±0.01 and with Uiso(H) = 1.2Ueq(N).
The various uses of 2-substituted thiophenes have been well documented (Campaigne, 1984; Kleemann et al., 2006). Amongst these appplications, are antimycobacterial activities, as found for a series of N-(aryl)-2-thiophen-2-ylacetamide derivatives (Lourenço et al., 2007), one structure of which, i.e. N-(2,6-dimethylphenyl)-2-(thiophen-2-yl)acetamide, was recently reported (Ferreira et al., 2009). Herein, we now report the structure of the title compound (I) prepared by the controlled reaction of p-iodophenylhydrazine with 2,5-thiophenedicarbaldehyde. As indicated in the literature, controlled reactions of arylhydrazines with arenedicarbaldehydes can successfully produce mono-hydrazones (Reuch & Heflet, 1956; Vaysse & Pastour, 1964; Butler et al., 1990; Glidewell, et al., 2005; Low et al., 2006; Wardell et al., 2006).
The overall molecule of (I), Fig. 1, is non-planar as evidenced by the dihedral angle of 21.4 (3)° formed between the thiophene and benzene rings. The twist in the molecule is most evident in the C4–N1–N2–C7 torsion angle of -172.2 (6) ° and. more particularly, in the adjacent N2–N1–C4–C3 torsion angle of -20.8 (9) °. The conformation about the C7═N2 bond [1.284 (8) Å] is E. The thiophene-S and aldehyde-O atoms are syn and are directed towards the benzene ring so that, overall, the molecule has a U-shape. The most prominent intermolecular interactions operating in the are N–H···O hydrogen bonds, Table 1. These lead to supramolecular chains along the b direction, Fig. 2. Chains are connected along the c direction by I···I contacts [I···Ii = 3.7630 (8) Å for i: -x, 1 - y, 1 - z] to form a 2-D array. Layers thus formed stack along the a direction, Fig. 3.
For background to 2-substituted thiophenes, see: Campaigne (1984); Kleemann et al. (2006). For the antimycobacterial activity of 2-substituted thiophenes, see: Lourenço et al. (2007). For a related structure, see: Ferreira et al. (2009). For background to the production of mono-hydrazones by the reaction of arylhydrazines with arenedicarbaldehydes, see: Reuch & Heflet (1956); Vaysse & Pastour (1964); Butler et al. (1990); Glidewell et al. (2005); Low et al. (2006); Wardell et al. (2006).
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).C12H9IN2OS | F(000) = 1376 |
Mr = 356.17 | Dx = 1.876 Mg m−3 |
Orthorhombic, Pbca | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ac 2ab | Cell parameters from 16555 reflections |
a = 6.9291 (9) Å | θ = 2.9–27.5° |
b = 11.7602 (10) Å | µ = 2.69 mm−1 |
c = 30.958 (4) Å | T = 120 K |
V = 2522.7 (5) Å3 | Prism, colourless |
Z = 8 | 0.16 × 0.08 × 0.05 mm |
Nonius KappaCCD diffractometer | 2614 independent reflections |
Radiation source: Enraf Nonius FR591 rotating anode | 1674 reflections with I > 2σ(I) |
10 cm confocal mirrors monochromator | Rint = 0.095 |
Detector resolution: 9.091 pixels mm-1 | θmax = 26.5°, θmin = 3.2° |
φ and ω scans | h = −8→8 |
Absorption correction: multi-scan (SADABS; Sheldrick, 2007) | k = −14→14 |
Tmin = 0.616, Tmax = 0.746 | l = −38→37 |
15735 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)] = 0.058 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.113 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | w = 1/[σ2(Fo2) + (0.0257P)2 + 17.1487P] where P = (Fo2 + 2Fc2)/3 |
2614 reflections | (Δ/σ)max = 0.001 |
157 parameters | Δρmax = 1.08 e Å−3 |
1 restraint | Δρmin = −0.60 e Å−3 |
C12H9IN2OS | V = 2522.7 (5) Å3 |
Mr = 356.17 | Z = 8 |
Orthorhombic, Pbca | Mo Kα radiation |
a = 6.9291 (9) Å | µ = 2.69 mm−1 |
b = 11.7602 (10) Å | T = 120 K |
c = 30.958 (4) Å | 0.16 × 0.08 × 0.05 mm |
Nonius KappaCCD diffractometer | 2614 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 2007) | 1674 reflections with I > 2σ(I) |
Tmin = 0.616, Tmax = 0.746 | Rint = 0.095 |
15735 measured reflections |
R[F2 > 2σ(F2)] = 0.058 | 1 restraint |
wR(F2) = 0.113 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | w = 1/[σ2(Fo2) + (0.0257P)2 + 17.1487P] where P = (Fo2 + 2Fc2)/3 |
2614 reflections | Δρmax = 1.08 e Å−3 |
157 parameters | Δρmin = −0.60 e Å−3 |
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 | ||
I1 | −0.01127 (8) | 0.34335 (4) | 0.487908 (18) | 0.04277 (19) | |
S1 | 0.1013 (3) | 0.10271 (14) | 0.21597 (6) | 0.0261 (4) | |
N1 | 0.0936 (8) | −0.0324 (5) | 0.3466 (2) | 0.0282 (14) | |
H1N | 0.039 (9) | −0.099 (3) | 0.350 (2) | 0.034* | |
N2 | 0.1043 (8) | 0.0033 (5) | 0.3048 (2) | 0.0266 (13) | |
O1 | 0.1012 (7) | 0.2541 (4) | 0.13359 (16) | 0.0336 (12) | |
C1 | 0.0410 (10) | 0.2143 (6) | 0.4423 (2) | 0.0323 (18) | |
C2 | 0.1194 (10) | 0.2425 (6) | 0.4030 (2) | 0.0322 (18) | |
H2 | 0.1610 | 0.3182 | 0.3976 | 0.039* | |
C3 | 0.1374 (9) | 0.1609 (6) | 0.3714 (2) | 0.0278 (16) | |
H3 | 0.1900 | 0.1808 | 0.3441 | 0.033* | |
C4 | 0.0794 (9) | 0.0499 (6) | 0.3792 (2) | 0.0231 (15) | |
C5 | 0.0110 (10) | 0.0198 (5) | 0.4197 (2) | 0.0284 (16) | |
H5 | −0.0202 | −0.0573 | 0.4257 | 0.034* | |
C6 | −0.0121 (10) | 0.1017 (6) | 0.4514 (2) | 0.0332 (17) | |
H6 | −0.0631 | 0.0820 | 0.4789 | 0.040* | |
C7 | 0.0949 (10) | −0.0729 (6) | 0.2752 (2) | 0.0275 (17) | |
H7 | 0.0837 | −0.1509 | 0.2827 | 0.033* | |
C8 | 0.1016 (9) | −0.0394 (5) | 0.2306 (2) | 0.0249 (16) | |
C9 | 0.1085 (9) | 0.0672 (6) | 0.1616 (2) | 0.0239 (15) | |
C10 | 0.1118 (10) | −0.0491 (6) | 0.1562 (2) | 0.0291 (17) | |
H10 | 0.1177 | −0.0849 | 0.1288 | 0.035* | |
C11 | 0.1057 (10) | −0.1090 (6) | 0.1951 (2) | 0.0292 (16) | |
H11 | 0.1046 | −0.1897 | 0.1968 | 0.035* | |
C12 | 0.1088 (9) | 0.1509 (6) | 0.1282 (2) | 0.0288 (16) | |
H12 | 0.1156 | 0.1243 | 0.0993 | 0.035* |
U11 | U22 | U33 | U12 | U13 | U23 | |
I1 | 0.0425 (3) | 0.0365 (3) | 0.0493 (3) | −0.0005 (3) | 0.0024 (3) | −0.0128 (3) |
S1 | 0.0228 (9) | 0.0219 (8) | 0.0336 (10) | −0.0006 (8) | 0.0004 (8) | −0.0049 (8) |
N1 | 0.023 (3) | 0.020 (3) | 0.042 (4) | −0.002 (3) | 0.004 (3) | 0.001 (3) |
N2 | 0.020 (3) | 0.030 (3) | 0.030 (4) | 0.001 (3) | 0.005 (3) | 0.003 (3) |
O1 | 0.027 (3) | 0.025 (3) | 0.049 (3) | −0.003 (2) | −0.004 (3) | −0.001 (2) |
C1 | 0.029 (4) | 0.033 (4) | 0.035 (4) | 0.001 (3) | −0.007 (3) | −0.003 (3) |
C2 | 0.025 (4) | 0.027 (4) | 0.045 (5) | −0.005 (3) | −0.005 (4) | −0.002 (3) |
C3 | 0.018 (3) | 0.026 (4) | 0.039 (4) | −0.002 (3) | −0.002 (3) | −0.001 (3) |
C4 | 0.018 (3) | 0.024 (4) | 0.027 (4) | 0.001 (3) | −0.002 (3) | −0.001 (3) |
C5 | 0.027 (4) | 0.020 (3) | 0.038 (4) | 0.001 (3) | −0.003 (4) | 0.003 (3) |
C6 | 0.034 (4) | 0.032 (4) | 0.034 (4) | 0.002 (4) | 0.001 (4) | −0.001 (3) |
C7 | 0.021 (4) | 0.022 (4) | 0.040 (5) | 0.000 (3) | 0.000 (4) | 0.001 (3) |
C8 | 0.017 (3) | 0.018 (3) | 0.039 (4) | −0.002 (3) | 0.001 (3) | −0.005 (3) |
C9 | 0.012 (3) | 0.031 (4) | 0.029 (4) | 0.002 (3) | 0.001 (3) | −0.006 (3) |
C10 | 0.023 (4) | 0.025 (4) | 0.039 (5) | 0.001 (3) | −0.002 (3) | −0.011 (3) |
C11 | 0.026 (4) | 0.018 (3) | 0.044 (5) | 0.000 (3) | 0.010 (4) | −0.006 (3) |
C12 | 0.020 (3) | 0.027 (4) | 0.040 (5) | 0.005 (4) | −0.002 (3) | −0.007 (3) |
I1—C1 | 2.103 (7) | C4—C5 | 1.387 (9) |
S1—C8 | 1.732 (7) | C5—C6 | 1.386 (9) |
S1—C9 | 1.734 (7) | C5—H5 | 0.9500 |
N1—N2 | 1.362 (8) | C6—H6 | 0.9500 |
N1—C4 | 1.402 (8) | C7—C8 | 1.436 (9) |
N1—H1N | 0.876 (10) | C7—H7 | 0.9500 |
N2—C7 | 1.284 (8) | C8—C11 | 1.371 (9) |
O1—C12 | 1.227 (8) | C9—C10 | 1.378 (9) |
C1—C2 | 1.374 (10) | C9—C12 | 1.429 (9) |
C1—C6 | 1.403 (10) | C10—C11 | 1.395 (10) |
C2—C3 | 1.376 (9) | C10—H10 | 0.9500 |
C2—H2 | 0.9500 | C11—H11 | 0.9500 |
C3—C4 | 1.388 (9) | C12—H12 | 0.9500 |
C3—H3 | 0.9500 | ||
C8—S1—C9 | 91.2 (3) | C5—C6—H6 | 120.5 |
N2—N1—C4 | 118.3 (6) | C1—C6—H6 | 120.5 |
N2—N1—H1N | 114 (5) | N2—C7—C8 | 119.6 (6) |
C4—N1—H1N | 120 (5) | N2—C7—H7 | 120.2 |
C7—N2—N1 | 117.4 (6) | C8—C7—H7 | 120.2 |
C2—C1—C6 | 120.6 (7) | C11—C8—C7 | 127.4 (6) |
C2—C1—I1 | 119.2 (5) | C11—C8—S1 | 111.5 (5) |
C6—C1—I1 | 120.1 (5) | C7—C8—S1 | 121.1 (5) |
C1—C2—C3 | 119.8 (7) | C10—C9—C12 | 126.6 (6) |
C1—C2—H2 | 120.1 | C10—C9—S1 | 110.9 (5) |
C3—C2—H2 | 120.1 | C12—C9—S1 | 122.5 (5) |
C2—C3—C4 | 120.5 (7) | C9—C10—C11 | 113.3 (6) |
C2—C3—H3 | 119.8 | C9—C10—H10 | 123.3 |
C4—C3—H3 | 119.8 | C11—C10—H10 | 123.3 |
C3—C4—C5 | 119.7 (6) | C8—C11—C10 | 113.0 (6) |
C3—C4—N1 | 120.4 (6) | C8—C11—H11 | 123.5 |
C5—C4—N1 | 119.9 (6) | C10—C11—H11 | 123.5 |
C6—C5—C4 | 120.2 (6) | O1—C12—C9 | 125.7 (7) |
C6—C5—H5 | 119.9 | O1—C12—H12 | 117.2 |
C4—C5—H5 | 119.9 | C9—C12—H12 | 117.2 |
C5—C6—C1 | 118.9 (7) | ||
C4—N1—N2—C7 | −172.2 (6) | N2—C7—C8—C11 | 175.5 (7) |
C6—C1—C2—C3 | 3.2 (11) | N2—C7—C8—S1 | −5.6 (9) |
I1—C1—C2—C3 | −173.9 (5) | C9—S1—C8—C11 | −0.4 (5) |
C1—C2—C3—C4 | −0.9 (10) | C9—S1—C8—C7 | −179.4 (6) |
C2—C3—C4—C5 | −3.0 (10) | C8—S1—C9—C10 | −0.3 (5) |
C2—C3—C4—N1 | 178.4 (6) | C8—S1—C9—C12 | 179.2 (6) |
N2—N1—C4—C3 | −20.8 (9) | C12—C9—C10—C11 | −178.5 (6) |
N2—N1—C4—C5 | 160.6 (6) | S1—C9—C10—C11 | 0.9 (8) |
C3—C4—C5—C6 | 4.5 (10) | C7—C8—C11—C10 | 180.0 (7) |
N1—C4—C5—C6 | −176.9 (6) | S1—C8—C11—C10 | 1.0 (8) |
C4—C5—C6—C1 | −2.1 (11) | C9—C10—C11—C8 | −1.2 (9) |
C2—C1—C6—C5 | −1.7 (11) | C10—C9—C12—O1 | 178.2 (7) |
I1—C1—C6—C5 | 175.4 (5) | S1—C9—C12—O1 | −1.2 (10) |
N1—N2—C7—C8 | 178.7 (6) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1n···O1i | 0.88 (4) | 2.05 (5) | 2.916 (8) | 172 (5) |
Symmetry code: (i) −x, y−1/2, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C12H9IN2OS |
Mr | 356.17 |
Crystal system, space group | Orthorhombic, Pbca |
Temperature (K) | 120 |
a, b, c (Å) | 6.9291 (9), 11.7602 (10), 30.958 (4) |
V (Å3) | 2522.7 (5) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 2.69 |
Crystal size (mm) | 0.16 × 0.08 × 0.05 |
Data collection | |
Diffractometer | Nonius KappaCCD |
Absorption correction | Multi-scan (SADABS; Sheldrick, 2007) |
Tmin, Tmax | 0.616, 0.746 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 15735, 2614, 1674 |
Rint | 0.095 |
(sin θ/λ)max (Å−1) | 0.628 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.058, 0.113, 1.04 |
No. of reflections | 2614 |
No. of parameters | 157 |
No. of restraints | 1 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
w = 1/[σ2(Fo2) + (0.0257P)2 + 17.1487P] where P = (Fo2 + 2Fc2)/3 | |
Δρmax, Δρmin (e Å−3) | 1.08, −0.60 |
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 |
N1—H1n···O1i | 0.88 (4) | 2.05 (5) | 2.916 (8) | 172 (5) |
Symmetry code: (i) −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 and FAPEMIG (Brazil).
References
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The various uses of 2-substituted thiophenes have been well documented (Campaigne, 1984; Kleemann et al., 2006). Amongst these appplications, are antimycobacterial activities, as found for a series of N-(aryl)-2-thiophen-2-ylacetamide derivatives (Lourenço et al., 2007), one structure of which, i.e. N-(2,6-dimethylphenyl)-2-(thiophen-2-yl)acetamide, was recently reported (Ferreira et al., 2009). Herein, we now report the structure of the title compound (I) prepared by the controlled reaction of p-iodophenylhydrazine with 2,5-thiophenedicarbaldehyde. As indicated in the literature, controlled reactions of arylhydrazines with arenedicarbaldehydes can successfully produce mono-hydrazones (Reuch & Heflet, 1956; Vaysse & Pastour, 1964; Butler et al., 1990; Glidewell, et al., 2005; Low et al., 2006; Wardell et al., 2006).
The overall molecule of (I), Fig. 1, is non-planar as evidenced by the dihedral angle of 21.4 (3)° formed between the thiophene and benzene rings. The twist in the molecule is most evident in the C4–N1–N2–C7 torsion angle of -172.2 (6) ° and. more particularly, in the adjacent N2–N1–C4–C3 torsion angle of -20.8 (9) °. The conformation about the C7═N2 bond [1.284 (8) Å] is E. The thiophene-S and aldehyde-O atoms are syn and are directed towards the benzene ring so that, overall, the molecule has a U-shape. The most prominent intermolecular interactions operating in the crystal structure are N–H···O hydrogen bonds, Table 1. These lead to supramolecular chains along the b direction, Fig. 2. Chains are connected along the c direction by I···I contacts [I···Ii = 3.7630 (8) Å for i: -x, 1 - y, 1 - z] to form a 2-D array. Layers thus formed stack along the a direction, Fig. 3.