organic compounds
(E)-1-(3-Nitrophenyl)-2-({5-[(1E)-2-(3-nitrophenyl)hydrazin-1-ylidenemethyl]-2-thienyl}methylidene)hydrazine
aDepartamento de Quimica, ICEx, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil, bDepartment of Chemistry, University of Aberdeen, Meston Walk, Old Aberdeen AB24 3UE, Scotland, cDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia, 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, and eCHEMSOL, 1 Harcourt Road, Aberdeen AB15 5NY, Scotland
*Correspondence e-mail: edward.tiekink@gmail.com
The title molecule, C18H14N6O4S, adopts a U-shape with the aromatic groups lying syn and oriented in the same direction as the thiophene S atom. Twists away from planarity are evident with the maximum deviation being found for a terminal nitro group: C/C/N/O = 19.0 (3)°. The conformation about each of the C=N bonds is E. In the crystal, centrosymmetrically related molecules are connected via N—H⋯Onitro hydrogen bonds, forming 14-membered {⋯HNC3NO}2 synthons. These are linked into layers via C—H⋯Onitro interactions with the primary interactions between layers being of the type C—H⋯π, where the π-system is the thiophene ring.
Related literature
For the preparation of et al. (2009); Wardell et al. (2007); Vaysse & Pastour (1964). For general uses of 2-substituted-thiophenes, see: Campaigne (1984). For their specific uses as materials, see: Michaleviciute et al. (2007, 2009); Kwon et al. (2009). For their specific uses as pharmacological agents, see: Kleemann et al. (2006); Sonar & Crooks (2009); Mellado et al. (2009); Satyanarayana et al. (2008); Lourenço et al. (2007). For related structures, see: Wardell et al. (2007, 2010); Ferreira et al. (2009); Nogueira et al. (2010).
of thiophenecarbaldehydes, see: KwonExperimental
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/S1600536810002771/hg2635sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810002771/hg2635Isup2.hkl
Solutions of 3-nitrophenylhydrazine.hydrochloride (0.38 g, 2 mmol) in EtOH (10 ml) and 2,5-thiophenedicarbaldehyde (0.14 g, 1 mmol) in EtOH (10 ml) were mixed. The reaction mixture was refluxed for 1 h, and rotary evaporated. The solid residue was recrystallised twice from aq. EtOH (v:v 1:2), m.p. 497-479 K. 1H NMR (400 MHz, DMSO-d6): δ 7.26 (s,2H), 7.41 (dd, 2H, J = 1 & 8.1 Hz), 7.51 (t,2H, J = 8.0 Hz), 7.59 (dd, 2H, J = 1.3 & 8.0 Hz), 7.79 (t, 2H, 2.0 Hz), 8.10 (s, 2H), 10.91(s, 2H) p.p.m. 13C (100 MHz, DMSO-d6): δ 105.7, 113.10, 118.2, 128.5, 130.5, 134.3, 140.1, 145.9, 148.8 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 N-bound H atoms were located from a difference map and refined with Uiso(H) = 1.5Ueq(N).
The preparation of hydrazonederivatives of thiophenecarbaldehydes is well documented (Kwon, et al. 2009; Wardell et al., 2007; Vaysse & Pastour, 1964). As a continuation of structural studies of this class of compound (Wardell et al., 2007; Ferreira et al., 2009; Nogueira et al., 2010; Wardell et al., 2010), the title compound (I) was synthesised and structurally investigated. 2-Substituted thiophenes in general have various uses, for example as dyestuffs, flavour agents, drugs, and inhibitors (Campaigne, 1984). Thiophenes are present in many natural and synthetic products with a wide range of pharmacological activities (Kleemann et al., 2006; Sonar & Crooks, 2009; Mellado et al., 2009; Satyanarayana et al., 2008; Lourenço et al., 2007). Specifically, hydrazone derivatives of thiophene have found uses in optoelectronic applications (Michaleviciute et al., 2007), as optical non-linear materials (Kwon et al., 2009), and as hole transporting materials (Michaleviciute et al., 2009).
The overall ═N1 [1.288 (3) Å] and C12═N4 [1.285 (3) Å] double bonds is E.
in (I) is U-shaped as the two aromatic residues lie to the same side of the molecule and are syn, being orientated in the same direction as the thiophene-S atom, Fig. 1. Twists from planarity in the molecule are evident in each of the side-arms, i.e. about the N2–C6 and N4–N5 bonds; the N1/N2/C6/C7 and C12/N4/N5/C13 torsion angles are 168.57 (18) and -170.79 (19) °, respectively. In addition, the values of the C7/C8/N3/O1 and C14/C14/N6/O3 torsion angles of -161.0 (2) and 164.4 (2) °, respectively, indicate each of the nitro groups is twisted out of the plane of the benzene ring to which it is bonded. The conformation about each of the C5In the crystal packing, centrosymmetrically related molecules associate via N–H···Onitro hydrogen bonds to result in the formation of a 14-membered {···HNC3NO}2 synthon, Table 1. The dimeric aggregates are linked into a supramolecular chain along the c axis via C–H···Onitro interactions, Table 1 and Fig. 2. The chains in turn are linked into layers in the ac plane via further C–H···Onitro interactions, Table 1. The layers thus formed stack along the b axis with the primary interactions between them being of the type C–H···π where the π-system is the thiophene ring [C12–H···ring centroid(S1,C1–C4)i = 2.58 Å, C12···ring centroidi = 3.323 (2) Å with an angle subtended at H = 135 ° for i: x, 3/2-y, -1/2+z]. The second N5-amine H does not participate in a formal hydrogen bond. It is noted that the N4–N5—H residues lie in the interlayer region and are in relative close proximity [e.g. N5–H···N4ii = 2.87 Å] but steric constraints preclude a closer approach of these groups to allow a hydrogen bonding interaction.
For the preparation of
of thiophenecarbaldehydes, see: Kwon et al. (2009); Wardell et al. (2007); Vaysse & Pastour (1964). For general uses of 2-substituted-thiophenes, see: Campaigne (1984). For their specific uses as materials, see: Michaleviciute et al. (2007, 2009); Kwon et al. (2009). For specific their uses as pharmacological agents, see: Kleemann et al. (2006); Sonar & Crooks (2009); Mellado et al. (2009); Satyanarayana et al. (2008); Lourenço et al. (2007). For related structures, see: Wardell et al. (2007, 2010); Ferreira et al. (2009); Nogueira et al. (2010)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).C18H14N6O4S | F(000) = 848 |
Mr = 410.41 | Dx = 1.492 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 13699 reflections |
a = 11.1790 (5) Å | θ = 2.9–27.5° |
b = 20.6993 (9) Å | µ = 0.22 mm−1 |
c = 8.0334 (2) Å | T = 120 K |
β = 100.513 (2)° | Rod, red |
V = 1827.70 (12) Å3 | 0.62 × 0.10 × 0.06 mm |
Z = 4 |
KappaCCD area-detector diffractometer | 4183 independent reflections |
Radiation source: Enraf Nonius FR591 rotating anode | 3001 reflections with I > 2σ(I) |
10 cm confocal mirrors monochromator | Rint = 0.071 |
Detector resolution: 9.091 pixels mm-1 | θmax = 27.5°, θmin = 3.1° |
φ and ω scans | h = −14→14 |
Absorption correction: multi-scan (SADABS; Sheldrick, 2007) | k = −26→26 |
Tmin = 0.668, Tmax = 0.746 | l = −10→9 |
21780 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)] = 0.046 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.133 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.08 | w = 1/[σ2(Fo2) + (0.0678P)2 + 0.3581P] where P = (Fo2 + 2Fc2)/3 |
4183 reflections | (Δ/σ)max = 0.001 |
268 parameters | Δρmax = 0.27 e Å−3 |
0 restraints | Δρmin = −0.34 e Å−3 |
C18H14N6O4S | V = 1827.70 (12) Å3 |
Mr = 410.41 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 11.1790 (5) Å | µ = 0.22 mm−1 |
b = 20.6993 (9) Å | T = 120 K |
c = 8.0334 (2) Å | 0.62 × 0.10 × 0.06 mm |
β = 100.513 (2)° |
KappaCCD area-detector diffractometer | 4183 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 2007) | 3001 reflections with I > 2σ(I) |
Tmin = 0.668, Tmax = 0.746 | Rint = 0.071 |
21780 measured reflections |
R[F2 > 2σ(F2)] = 0.046 | 0 restraints |
wR(F2) = 0.133 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.08 | Δρmax = 0.27 e Å−3 |
4183 reflections | Δρmin = −0.34 e Å−3 |
268 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 | ||
S1 | 0.51694 (5) | 0.64771 (3) | 0.10731 (6) | 0.01767 (15) | |
O1 | 0.86026 (16) | 0.47833 (10) | 1.1894 (2) | 0.0440 (5) | |
O2 | 0.66466 (16) | 0.47631 (9) | 1.16581 (19) | 0.0344 (4) | |
O3 | 1.09960 (18) | 0.66615 (11) | −0.6358 (3) | 0.0553 (6) | |
O4 | 0.91528 (19) | 0.66409 (11) | −0.7736 (2) | 0.0519 (6) | |
N1 | 0.50139 (16) | 0.59578 (9) | 0.4425 (2) | 0.0182 (4) | |
N2 | 0.50940 (17) | 0.56838 (9) | 0.5969 (2) | 0.0191 (4) | |
H2N | 0.446 (2) | 0.5655 (12) | 0.649 (3) | 0.029* | |
N3 | 0.75746 (18) | 0.48377 (10) | 1.1061 (2) | 0.0267 (5) | |
N4 | 0.60955 (16) | 0.69295 (9) | −0.1986 (2) | 0.0181 (4) | |
N5 | 0.65934 (16) | 0.70405 (9) | −0.3383 (2) | 0.0184 (4) | |
H5N | 0.611 (2) | 0.7106 (11) | −0.442 (3) | 0.028* | |
N6 | 0.9889 (2) | 0.66605 (11) | −0.6418 (3) | 0.0340 (5) | |
C1 | 0.38972 (19) | 0.64722 (10) | 0.2032 (2) | 0.0171 (4) | |
C2 | 0.29149 (19) | 0.67487 (10) | 0.1014 (3) | 0.0194 (5) | |
H2 | 0.2137 | 0.6787 | 0.1322 | 0.023* | |
C3 | 0.31778 (19) | 0.69709 (10) | −0.0543 (2) | 0.0186 (4) | |
H3 | 0.2596 | 0.7175 | −0.1389 | 0.022* | |
C4 | 0.43575 (19) | 0.68609 (10) | −0.0706 (2) | 0.0173 (4) | |
C5 | 0.3983 (2) | 0.61919 (10) | 0.3698 (2) | 0.0189 (5) | |
H5 | 0.3297 | 0.6181 | 0.4242 | 0.023* | |
C6 | 0.6201 (2) | 0.54271 (10) | 0.6765 (3) | 0.0184 (5) | |
C7 | 0.6332 (2) | 0.52533 (10) | 0.8470 (3) | 0.0189 (5) | |
H7 | 0.5680 | 0.5303 | 0.9069 | 0.023* | |
C8 | 0.7441 (2) | 0.50061 (11) | 0.9255 (2) | 0.0208 (5) | |
C9 | 0.8416 (2) | 0.49104 (11) | 0.8444 (3) | 0.0245 (5) | |
H9 | 0.9165 | 0.4740 | 0.9028 | 0.029* | |
C10 | 0.8256 (2) | 0.50743 (11) | 0.6740 (3) | 0.0240 (5) | |
H10 | 0.8903 | 0.5008 | 0.6140 | 0.029* | |
C11 | 0.7166 (2) | 0.53338 (10) | 0.5900 (3) | 0.0216 (5) | |
H11 | 0.7076 | 0.5448 | 0.4738 | 0.026* | |
C12 | 0.49410 (19) | 0.70092 (10) | −0.2128 (2) | 0.0174 (4) | |
H12 | 0.4474 | 0.7164 | −0.3159 | 0.021* | |
C13 | 0.77989 (19) | 0.68714 (10) | −0.3355 (2) | 0.0162 (4) | |
C14 | 0.8226 (2) | 0.68469 (10) | −0.4875 (3) | 0.0193 (5) | |
H14 | 0.7703 | 0.6936 | −0.5921 | 0.023* | |
C15 | 0.9433 (2) | 0.66899 (11) | −0.4818 (3) | 0.0223 (5) | |
C16 | 1.0241 (2) | 0.65534 (12) | −0.3337 (3) | 0.0264 (5) | |
H16 | 1.1069 | 0.6452 | −0.3345 | 0.032* | |
C17 | 0.9786 (2) | 0.65709 (11) | −0.1840 (3) | 0.0253 (5) | |
H17 | 1.0311 | 0.6473 | −0.0802 | 0.030* | |
C18 | 0.8583 (2) | 0.67280 (10) | −0.1833 (3) | 0.0200 (5) | |
H18 | 0.8289 | 0.6738 | −0.0796 | 0.024* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0173 (3) | 0.0206 (3) | 0.0161 (3) | 0.0015 (2) | 0.00585 (19) | 0.0015 (2) |
O1 | 0.0278 (11) | 0.0719 (15) | 0.0297 (10) | 0.0132 (10) | −0.0019 (8) | 0.0147 (9) |
O2 | 0.0306 (10) | 0.0526 (12) | 0.0217 (8) | 0.0002 (8) | 0.0090 (7) | 0.0075 (7) |
O3 | 0.0333 (12) | 0.0913 (18) | 0.0497 (12) | 0.0191 (11) | 0.0300 (10) | 0.0196 (11) |
O4 | 0.0481 (13) | 0.0905 (17) | 0.0198 (10) | 0.0207 (11) | 0.0136 (9) | 0.0044 (9) |
N1 | 0.0241 (10) | 0.0195 (10) | 0.0122 (8) | −0.0030 (8) | 0.0065 (7) | −0.0013 (7) |
N2 | 0.0215 (10) | 0.0240 (10) | 0.0132 (8) | −0.0002 (8) | 0.0069 (7) | 0.0020 (7) |
N3 | 0.0290 (12) | 0.0286 (11) | 0.0230 (10) | 0.0034 (9) | 0.0061 (9) | 0.0030 (8) |
N4 | 0.0212 (10) | 0.0197 (10) | 0.0152 (9) | −0.0012 (8) | 0.0080 (7) | −0.0006 (7) |
N5 | 0.0165 (9) | 0.0272 (10) | 0.0126 (9) | 0.0029 (8) | 0.0052 (7) | 0.0040 (7) |
N6 | 0.0326 (13) | 0.0449 (14) | 0.0297 (12) | 0.0129 (10) | 0.0192 (10) | 0.0116 (9) |
C1 | 0.0188 (11) | 0.0167 (11) | 0.0171 (10) | −0.0050 (9) | 0.0070 (8) | −0.0024 (8) |
C2 | 0.0161 (11) | 0.0241 (12) | 0.0186 (11) | −0.0013 (9) | 0.0051 (8) | −0.0013 (8) |
C3 | 0.0172 (11) | 0.0227 (11) | 0.0154 (10) | −0.0010 (9) | 0.0020 (8) | 0.0006 (8) |
C4 | 0.0204 (11) | 0.0164 (11) | 0.0148 (10) | −0.0018 (9) | 0.0025 (8) | −0.0001 (8) |
C5 | 0.0208 (11) | 0.0198 (11) | 0.0174 (10) | −0.0039 (9) | 0.0068 (8) | −0.0021 (8) |
C6 | 0.0212 (12) | 0.0151 (11) | 0.0190 (10) | −0.0044 (9) | 0.0042 (8) | −0.0020 (8) |
C7 | 0.0219 (12) | 0.0176 (11) | 0.0181 (10) | −0.0018 (9) | 0.0063 (8) | −0.0009 (8) |
C8 | 0.0258 (13) | 0.0207 (12) | 0.0156 (10) | −0.0034 (9) | 0.0032 (9) | 0.0009 (8) |
C9 | 0.0202 (12) | 0.0260 (13) | 0.0274 (12) | 0.0003 (10) | 0.0049 (9) | 0.0012 (9) |
C10 | 0.0211 (12) | 0.0261 (13) | 0.0274 (12) | −0.0029 (10) | 0.0112 (9) | 0.0001 (9) |
C11 | 0.0245 (12) | 0.0225 (12) | 0.0186 (11) | −0.0053 (9) | 0.0059 (9) | 0.0009 (8) |
C12 | 0.0190 (11) | 0.0183 (11) | 0.0150 (10) | 0.0006 (9) | 0.0033 (8) | −0.0009 (8) |
C13 | 0.0173 (11) | 0.0163 (11) | 0.0162 (10) | −0.0012 (8) | 0.0061 (8) | 0.0001 (8) |
C14 | 0.0200 (12) | 0.0201 (11) | 0.0186 (10) | 0.0004 (9) | 0.0060 (8) | 0.0031 (8) |
C15 | 0.0237 (12) | 0.0255 (12) | 0.0207 (11) | 0.0030 (9) | 0.0116 (9) | 0.0019 (8) |
C16 | 0.0149 (11) | 0.0340 (14) | 0.0313 (12) | 0.0040 (10) | 0.0070 (9) | 0.0018 (10) |
C17 | 0.0193 (12) | 0.0349 (14) | 0.0196 (11) | 0.0007 (10) | −0.0016 (9) | −0.0011 (9) |
C18 | 0.0234 (12) | 0.0236 (12) | 0.0137 (10) | −0.0002 (9) | 0.0050 (8) | −0.0002 (8) |
S1—C1 | 1.737 (2) | C5—H5 | 0.9500 |
S1—C4 | 1.739 (2) | C6—C11 | 1.399 (3) |
O1—N3 | 1.225 (3) | C6—C7 | 1.398 (3) |
O2—N3 | 1.229 (2) | C7—C8 | 1.382 (3) |
O3—N6 | 1.230 (3) | C7—H7 | 0.9500 |
O4—N6 | 1.217 (3) | C8—C9 | 1.382 (3) |
N1—C5 | 1.288 (3) | C9—C10 | 1.390 (3) |
N1—N2 | 1.352 (2) | C9—H9 | 0.9500 |
N2—C6 | 1.391 (3) | C10—C11 | 1.389 (3) |
N2—H2N | 0.89 (3) | C10—H10 | 0.9500 |
N3—C8 | 1.473 (3) | C11—H11 | 0.9500 |
N4—C12 | 1.285 (3) | C12—H12 | 0.9500 |
N4—N5 | 1.360 (2) | C13—C14 | 1.391 (3) |
N5—C13 | 1.389 (3) | C13—C18 | 1.400 (3) |
N5—H5N | 0.92 (2) | C14—C15 | 1.380 (3) |
N6—C15 | 1.468 (3) | C14—H14 | 0.9500 |
C1—C2 | 1.369 (3) | C15—C16 | 1.385 (3) |
C1—C5 | 1.445 (3) | C16—C17 | 1.388 (3) |
C2—C3 | 1.413 (3) | C16—H16 | 0.9500 |
C2—H2 | 0.9500 | C17—C18 | 1.385 (3) |
C3—C4 | 1.368 (3) | C17—H17 | 0.9500 |
C3—H3 | 0.9500 | C18—H18 | 0.9500 |
C4—C12 | 1.449 (3) | ||
C1—S1—C4 | 91.17 (10) | C6—C7—H7 | 121.1 |
C5—N1—N2 | 118.56 (18) | C9—C8—C7 | 123.82 (19) |
N1—N2—C6 | 119.09 (18) | C9—C8—N3 | 118.9 (2) |
N1—N2—H2N | 122.5 (16) | C7—C8—N3 | 117.29 (19) |
C6—N2—H2N | 118.4 (16) | C8—C9—C10 | 117.3 (2) |
O1—N3—O2 | 123.37 (19) | C8—C9—H9 | 121.4 |
O1—N3—C8 | 118.43 (19) | C10—C9—H9 | 121.4 |
O2—N3—C8 | 118.20 (19) | C9—C10—C11 | 121.2 (2) |
C12—N4—N5 | 117.41 (17) | C9—C10—H10 | 119.4 |
N4—N5—C13 | 119.06 (17) | C11—C10—H10 | 119.4 |
N4—N5—H5N | 121.3 (16) | C10—C11—C6 | 119.9 (2) |
C13—N5—H5N | 117.1 (16) | C10—C11—H11 | 120.0 |
O4—N6—O3 | 123.4 (2) | C6—C11—H11 | 120.0 |
O4—N6—C15 | 118.4 (2) | N4—C12—C4 | 119.47 (18) |
O3—N6—C15 | 118.2 (2) | N4—C12—H12 | 120.3 |
C2—C1—C5 | 129.17 (19) | C4—C12—H12 | 120.3 |
C2—C1—S1 | 111.39 (15) | N5—C13—C14 | 118.84 (18) |
C5—C1—S1 | 119.43 (16) | N5—C13—C18 | 121.25 (18) |
C1—C2—C3 | 113.04 (19) | C14—C13—C18 | 119.9 (2) |
C1—C2—H2 | 123.5 | C15—C14—C13 | 118.01 (19) |
C3—C2—H2 | 123.5 | C15—C14—H14 | 121.0 |
C4—C3—C2 | 112.95 (19) | C13—C14—H14 | 121.0 |
C4—C3—H3 | 123.5 | C14—C15—C16 | 123.8 (2) |
C2—C3—H3 | 123.5 | C14—C15—N6 | 118.30 (19) |
C3—C4—C12 | 128.36 (19) | C16—C15—N6 | 117.9 (2) |
C3—C4—S1 | 111.45 (15) | C15—C16—C17 | 117.0 (2) |
C12—C4—S1 | 120.17 (16) | C15—C16—H16 | 121.5 |
N1—C5—C1 | 118.30 (19) | C17—C16—H16 | 121.5 |
N1—C5—H5 | 120.9 | C18—C17—C16 | 121.3 (2) |
C1—C5—H5 | 120.9 | C18—C17—H17 | 119.4 |
N2—C6—C11 | 121.80 (19) | C16—C17—H17 | 119.4 |
N2—C6—C7 | 118.27 (19) | C17—C18—C13 | 119.98 (19) |
C11—C6—C7 | 119.9 (2) | C17—C18—H18 | 120.0 |
C8—C7—C6 | 117.9 (2) | C13—C18—H18 | 120.0 |
C8—C7—H7 | 121.1 | ||
C5—N1—N2—C6 | 179.76 (19) | N3—C8—C9—C10 | 179.9 (2) |
C12—N4—N5—C13 | −170.79 (19) | C8—C9—C10—C11 | 1.1 (3) |
C4—S1—C1—C2 | 0.37 (17) | C9—C10—C11—C6 | −0.8 (3) |
C4—S1—C1—C5 | 179.95 (17) | N2—C6—C11—C10 | −179.8 (2) |
C5—C1—C2—C3 | −179.9 (2) | C7—C6—C11—C10 | −0.6 (3) |
S1—C1—C2—C3 | −0.4 (2) | N5—N4—C12—C4 | 176.44 (18) |
C1—C2—C3—C4 | 0.2 (3) | C3—C4—C12—N4 | 173.0 (2) |
C2—C3—C4—C12 | 178.6 (2) | S1—C4—C12—N4 | −8.6 (3) |
C2—C3—C4—S1 | 0.1 (2) | N4—N5—C13—C14 | 165.61 (18) |
C1—S1—C4—C3 | −0.26 (17) | N4—N5—C13—C18 | −14.5 (3) |
C1—S1—C4—C12 | −178.90 (17) | N5—C13—C14—C15 | 178.8 (2) |
N2—N1—C5—C1 | −178.75 (17) | C18—C13—C14—C15 | −1.1 (3) |
C2—C1—C5—N1 | −180.0 (2) | C13—C14—C15—C16 | 0.2 (3) |
S1—C1—C5—N1 | 0.5 (3) | C13—C14—C15—N6 | 179.7 (2) |
N1—N2—C6—C11 | −12.2 (3) | O4—N6—C15—C14 | −15.1 (3) |
N1—N2—C6—C7 | 168.57 (18) | O3—N6—C15—C14 | 164.4 (2) |
N2—C6—C7—C8 | −179.20 (19) | O4—N6—C15—C16 | 164.5 (2) |
C11—C6—C7—C8 | 1.5 (3) | O3—N6—C15—C16 | −16.0 (3) |
C6—C7—C8—C9 | −1.2 (3) | C14—C15—C16—C17 | 0.8 (4) |
C6—C7—C8—N3 | 178.75 (18) | N6—C15—C16—C17 | −178.7 (2) |
O1—N3—C8—C9 | 19.0 (3) | C15—C16—C17—C18 | −1.0 (4) |
O2—N3—C8—C9 | −161.5 (2) | C16—C17—C18—C13 | 0.1 (3) |
O1—N3—C8—C7 | −161.0 (2) | N5—C13—C18—C17 | −178.9 (2) |
O2—N3—C8—C7 | 18.6 (3) | C14—C13—C18—C17 | 0.9 (3) |
C7—C8—C9—C10 | −0.1 (3) |
Cg1 is the centroid of the S1,C1–C4 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2n···O2i | 0.89 (2) | 2.27 (2) | 3.103 (2) | 156 (2) |
C2—H2···O3ii | 0.95 | 2.46 | 3.278 (3) | 145 |
C18—H18···O4iii | 0.95 | 2.48 | 3.241 (3) | 137 |
C12—H12···Cg1iv | 0.95 | 2.58 | 3.323 (2) | 135 |
Symmetry codes: (i) −x+1, −y+1, −z+2; (ii) x−1, y, z+1; (iii) x, y, z+1; (iv) x, −y+3/2, z−1/2. |
Experimental details
Crystal data | |
Chemical formula | C18H14N6O4S |
Mr | 410.41 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 120 |
a, b, c (Å) | 11.1790 (5), 20.6993 (9), 8.0334 (2) |
β (°) | 100.513 (2) |
V (Å3) | 1827.70 (12) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.22 |
Crystal size (mm) | 0.62 × 0.10 × 0.06 |
Data collection | |
Diffractometer | KappaCCD area-detector |
Absorption correction | Multi-scan (SADABS; Sheldrick, 2007) |
Tmin, Tmax | 0.668, 0.746 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 21780, 4183, 3001 |
Rint | 0.071 |
(sin θ/λ)max (Å−1) | 0.650 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.046, 0.133, 1.08 |
No. of reflections | 4183 |
No. of parameters | 268 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.27, −0.34 |
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).
Cg1 is the centroid of the S1,C1–C4 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2n···O2i | 0.89 (2) | 2.27 (2) | 3.103 (2) | 156 (2) |
C2—H2···O3ii | 0.95 | 2.46 | 3.278 (3) | 145 |
C18—H18···O4iii | 0.95 | 2.48 | 3.241 (3) | 137 |
C12—H12···Cg1iv | 0.95 | 2.58 | 3.323 (2) | 135 |
Symmetry codes: (i) −x+1, −y+1, −z+2; (ii) x−1, y, z+1; (iii) x, y, z+1; (iv) x, −y+3/2, 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).
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.
The preparation of hydrazonederivatives of thiophenecarbaldehydes is well documented (Kwon, et al. 2009; Wardell et al., 2007; Vaysse & Pastour, 1964). As a continuation of structural studies of this class of compound (Wardell et al., 2007; Ferreira et al., 2009; Nogueira et al., 2010; Wardell et al., 2010), the title compound (I) was synthesised and structurally investigated. 2-Substituted thiophenes in general have various uses, for example as dyestuffs, flavour agents, drugs, and inhibitors (Campaigne, 1984). Thiophenes are present in many natural and synthetic products with a wide range of pharmacological activities (Kleemann et al., 2006; Sonar & Crooks, 2009; Mellado et al., 2009; Satyanarayana et al., 2008; Lourenço et al., 2007). Specifically, hydrazone derivatives of thiophene have found uses in optoelectronic applications (Michaleviciute et al., 2007), as optical non-linear materials (Kwon et al., 2009), and as hole transporting materials (Michaleviciute et al., 2009).
The overall molecular conformation in (I) is U-shaped as the two aromatic residues lie to the same side of the molecule and are syn, being orientated in the same direction as the thiophene-S atom, Fig. 1. Twists from planarity in the molecule are evident in each of the side-arms, i.e. about the N2–C6 and N4–N5 bonds; the N1/N2/C6/C7 and C12/N4/N5/C13 torsion angles are 168.57 (18) and -170.79 (19) °, respectively. In addition, the values of the C7/C8/N3/O1 and C14/C14/N6/O3 torsion angles of -161.0 (2) and 164.4 (2) °, respectively, indicate each of the nitro groups is twisted out of the plane of the benzene ring to which it is bonded. The conformation about each of the C5═N1 [1.288 (3) Å] and C12═N4 [1.285 (3) Å] double bonds is E.
In the crystal packing, centrosymmetrically related molecules associate via N–H···Onitro hydrogen bonds to result in the formation of a 14-membered {···HNC3NO}2 synthon, Table 1. The dimeric aggregates are linked into a supramolecular chain along the c axis via C–H···Onitro interactions, Table 1 and Fig. 2. The chains in turn are linked into layers in the ac plane via further C–H···Onitro interactions, Table 1. The layers thus formed stack along the b axis with the primary interactions between them being of the type C–H···π where the π-system is the thiophene ring [C12–H···ring centroid(S1,C1–C4)i = 2.58 Å, C12···ring centroidi = 3.323 (2) Å with an angle subtended at H = 135 ° for symmetry operation i: x, 3/2-y, -1/2+z]. The second N5-amine H does not participate in a formal hydrogen bond. It is noted that the N4–N5—H residues lie in the interlayer region and are in relative close proximity [e.g. N5–H···N4ii = 2.87 Å] but steric constraints preclude a closer approach of these groups to allow a hydrogen bonding interaction.