organic compounds
E)-({2-[3-(2-{(1E)-[(carbamothioylamino)imino]methyl}phenoxy)propoxy]phenyl}methylidene)amino]thiourea with an unknown solvate
of [(aDepartment of Chemistry, Tulane University, New Orleans, LA 70118, USA, bFaculty of Science & Engineering, School of Healthcare Science, Manchester Metropolitan University, Manchester M1 5GD, England, cChemistry Department, Faculty of Science, Minia University, 61519 El-Minia, Egypt, dDepartment of Physics, Faculty of Sciences, Erciyes University, 38039 Kayseri, Turkey, eChemistry Department, Faculty of Science, Sohag University, 82524 Sohag, Egypt, and fKirkuk University, College of Education, Department of Chemistry, Kirkuk, Iraq
*Correspondence e-mail: shaabankamel@yahoo.com
The title molecule, C19H22N6O2S2, has crystallographically imposed C2 symmetry, with the central C atom lying on the rotation axis. The O—C—C—C torsion angle for the central chain is −59.22 (16)° and the dihedral angle between the planes of the benzene rings is 75.20 (7)°. In the crystal, N—H⋯O and N—H⋯S interactions link the molecules, forming a three-dimensional network encompassing channels running parallel to the c axis, which account for about 20% of the unit-cell volume. The contribution to the scattering from the highly disordered solvent molecules in these channels was removed with the SQUEEZE routine [Spek (2015). Acta Cryst. C71, 9–18] in PLATON. The stated crystal data for Mr, μ etc. do not take these into account.
Keywords: crystal structure; bis-thiosemicarbazones; biological activity; SQUEEZE.
CCDC reference: 1408451
1. Related literature
For the various biological activities of bis-thiosemicarbazones, see: Singh et al. (2001); Offiong & Martelli (1997). For general synthesis and assessment of the pharmaceutical properties of thiosemicarbazone scaffold compounds, see: Greenbaum et al. (2004); Finch et al. (1999); Wilson et al. (1974); Du et al. (2002); Desai et al. (1984); Shucla et al. (1984); Vrdoljak et al. (2010); Belicchi-Ferrari et al. (2010); Marzano et al. (2009). For use of the SQUEEZE routine in PLATON to remove the contribution of disordered solvents, see: Spek (2009, 2015).
2. Experimental
2.1. Crystal data
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2.3. Refinement
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Data collection: APEX2 (Bruker, 2014); cell SAINT (Bruker, 2014); data reduction: SAINT; program(s) used to solve structure: SHELXT (Sheldrick, 2015a); program(s) used to refine structure: SHELXL2014 (Sheldrick, 2015b); molecular graphics: DIAMOND (Brandenburg & Putz, 2012) and ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: SHELXTL (Sheldrick, 2008) and WinGX (Farrugia, 2012).
Supporting information
CCDC reference: 1408451
10.1107/S2056989015012074/hb7453sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S2056989015012074/hb7453Isup2.hkl
Supporting information file. DOI: 10.1107/S2056989015012074/hb7453Isup3.cml
A mixture of 0.5 mmol (142 mg) of 2,2'-[ethane-1,2-diylbis(oxy)]dibenzaldehyde and 1 mmol (91 mg) of thiosemicarbazide in ethanol (10 ml) was heated under reflux for 4 h in the presence of a catalytic amount of acetic acid. After cooling, the reaction mixture was poured into an ice-water. The resulting solid product was then filtered off, washed with water, dried and crystallized from dimethylformamide to afford the title compound. Mp 488 K.
The H-atom (H10A) attached to C10 was located from a difference Fourier map and refined with restraint C—–H = 0.99 (2) Å using a riding model, with Uiso(H) = 1.2 Ueq(C). The other H-atoms attached to carbon were placed in calculated positions (C—H = 0.95 - 0.99 Å) while those attached to nitrogen were placed in locations derived from a difference map and their parameters adjusted to give N—H = 0.91 Å. All were included as riding contributions with isotropic displacement parameters 1.2 times those of the attached atoms. A region of density amounting to the scattering from approximately 1.5 carbon atoms, apparently disordered about the twofold axis and well removed from the main molecule was removed with PLATON SQUEEZE (Spek, 2009) after it proved impossible to identify it with any reasonable solvent or byproduct molecule.
Data collection: APEX2 (Bruker, 2014); cell
SAINT (Bruker, 2014); data reduction: SAINT (Bruker, 2014); program(s) used to solve structure: SHELXT (Sheldrick, 2015a); program(s) used to refine structure: SHELXL2014 (Sheldrick, 2015b); molecular graphics: DIAMOND (Brandenburg & Putz, 2012) and ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: SHELXTL (Sheldrick, 2008) and WinGX (Farrugia, 2012).Fig. 1. The title molecule with labeling scheme and 50% probability ellipsoids. Atoms with the suffix a are related to their counterparts by the crystallographic twofold axis passing through C10. | |
Fig. 2. Packing viewed down the b axis. N—H···O and N—H···S hydrogen bonds are shown, respectively, as blue and purple dotted lines. | |
Fig. 3. Packing viewed down the the c axis showing the one-dimensonal channels. |
C19H22N6O2S2 | F(000) = 904 |
Mr = 430.55 | Dx = 1.175 Mg m−3 |
Monoclinic, C2/c | Cu Kα radiation, λ = 1.54178 Å |
Hall symbol: -C 2yc | Cell parameters from 5935 reflections |
a = 19.3941 (5) Å | θ = 4.2–72.3° |
b = 12.7110 (3) Å | µ = 2.19 mm−1 |
c = 10.1450 (3) Å | T = 150 K |
β = 103.306 (2)° | Plate, colourless |
V = 2433.79 (11) Å3 | 0.44 × 0.23 × 0.05 mm |
Z = 4 |
Bruker D8 VENTURE PHOTON 100 CMOS diffractometer | 2365 independent reflections |
Radiation source: INCOATEC IµS micro–focus source | 1886 reflections with I > 2σ(I) |
Mirror monochromator | Rint = 0.042 |
Detector resolution: 10.4167 pixels mm-1 | θmax = 72.4°, θmin = 4.7° |
ω scans | h = −23→21 |
Absorption correction: multi-scan (SADABS; Bruker, 2014) | k = −15→15 |
Tmin = 0.71, Tmax = 0.91 | l = −12→11 |
8997 measured reflections |
Refinement on F2 | 1 restraint |
Least-squares matrix: full | Hydrogen site location: mixed |
R[F2 > 2σ(F2)] = 0.040 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.112 | w = 1/[σ2(Fo2) + (0.0642P)2 + 0.5713P] where P = (Fo2 + 2Fc2)/3 |
S = 1.06 | (Δ/σ)max = 0.001 |
2365 reflections | Δρmax = 0.24 e Å−3 |
135 parameters | Δρmin = −0.22 e Å−3 |
C19H22N6O2S2 | V = 2433.79 (11) Å3 |
Mr = 430.55 | Z = 4 |
Monoclinic, C2/c | Cu Kα radiation |
a = 19.3941 (5) Å | µ = 2.19 mm−1 |
b = 12.7110 (3) Å | T = 150 K |
c = 10.1450 (3) Å | 0.44 × 0.23 × 0.05 mm |
β = 103.306 (2)° |
Bruker D8 VENTURE PHOTON 100 CMOS diffractometer | 2365 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2014) | 1886 reflections with I > 2σ(I) |
Tmin = 0.71, Tmax = 0.91 | Rint = 0.042 |
8997 measured reflections |
R[F2 > 2σ(F2)] = 0.040 | 1 restraint |
wR(F2) = 0.112 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.06 | Δρmax = 0.24 e Å−3 |
2365 reflections | Δρmin = −0.22 e Å−3 |
135 parameters |
Geometry. Bond distances, angles etc. have been calculated using the rounded fractional coordinates. All su's are estimated from the variances of the (full) variance-covariance matrix. The cell e.s.d.'s are taken into account in the estimation of distances, angles and torsion angles |
Refinement. Refinement on F2 for ALL reflections except those flagged by the user for potential systematic errors. Weighted R-factors wR and all goodnesses of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The observed criterion of F2 > σ(F2) is used only for calculating -R-factor-obs 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 | 0.16947 (3) | 0.37583 (4) | 1.00065 (5) | 0.0410 (2) | |
O1 | 0.41803 (6) | 0.15260 (9) | 0.63827 (14) | 0.0374 (4) | |
N1 | 0.18026 (8) | 0.48300 (11) | 0.78226 (16) | 0.0378 (5) | |
N2 | 0.24940 (8) | 0.33630 (12) | 0.82840 (15) | 0.0362 (5) | |
N3 | 0.27239 (8) | 0.35523 (11) | 0.71219 (16) | 0.0355 (4) | |
C1 | 0.20151 (9) | 0.40093 (13) | 0.86192 (18) | 0.0338 (5) | |
C2 | 0.31703 (9) | 0.28864 (13) | 0.68644 (18) | 0.0343 (5) | |
C3 | 0.34370 (10) | 0.29762 (13) | 0.56355 (19) | 0.0356 (5) | |
C4 | 0.31914 (10) | 0.37535 (16) | 0.4677 (2) | 0.0437 (6) | |
C5 | 0.34321 (11) | 0.38278 (17) | 0.3499 (2) | 0.0493 (7) | |
C6 | 0.39290 (12) | 0.31119 (18) | 0.3267 (2) | 0.0499 (7) | |
C7 | 0.41864 (11) | 0.23341 (16) | 0.4199 (2) | 0.0443 (6) | |
C8 | 0.39431 (10) | 0.22645 (13) | 0.53912 (19) | 0.0358 (5) | |
C9 | 0.47639 (10) | 0.08725 (14) | 0.6228 (2) | 0.0421 (6) | |
C10 | 0.50000 | 0.0236 (2) | 0.75000 | 0.0468 (9) | |
H1A | 0.19900 | 0.49480 | 0.70920 | 0.0450* | |
H1B | 0.15310 | 0.53380 | 0.80830 | 0.0450* | |
H2 | 0.33300 | 0.23270 | 0.74800 | 0.0410* | |
H2A | 0.26650 | 0.27530 | 0.87040 | 0.0430* | |
H4 | 0.28500 | 0.42450 | 0.48350 | 0.0520* | |
H5 | 0.32590 | 0.43640 | 0.28560 | 0.0590* | |
H6 | 0.40940 | 0.31570 | 0.24570 | 0.0600* | |
H7 | 0.45280 | 0.18470 | 0.40310 | 0.0530* | |
H9A | 0.51590 | 0.13150 | 0.60780 | 0.0500* | |
H9B | 0.46130 | 0.04000 | 0.54380 | 0.0500* | |
H10A | 0.4614 (9) | −0.0236 (16) | 0.755 (2) | 0.0560* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0497 (3) | 0.0379 (3) | 0.0406 (3) | 0.0112 (2) | 0.0209 (2) | 0.0037 (2) |
O1 | 0.0372 (7) | 0.0318 (6) | 0.0488 (8) | 0.0044 (5) | 0.0212 (6) | −0.0030 (5) |
N1 | 0.0403 (9) | 0.0350 (8) | 0.0413 (9) | 0.0098 (6) | 0.0161 (7) | 0.0036 (6) |
N2 | 0.0410 (9) | 0.0330 (7) | 0.0378 (9) | 0.0080 (6) | 0.0158 (7) | 0.0024 (6) |
N3 | 0.0367 (8) | 0.0332 (7) | 0.0393 (8) | 0.0023 (6) | 0.0146 (7) | −0.0007 (6) |
C1 | 0.0325 (9) | 0.0315 (8) | 0.0385 (10) | 0.0019 (7) | 0.0107 (7) | −0.0044 (7) |
C2 | 0.0339 (9) | 0.0283 (8) | 0.0418 (10) | 0.0015 (7) | 0.0110 (8) | −0.0017 (7) |
C3 | 0.0353 (9) | 0.0333 (9) | 0.0399 (10) | −0.0033 (7) | 0.0121 (7) | −0.0043 (7) |
C4 | 0.0433 (11) | 0.0426 (11) | 0.0467 (11) | 0.0020 (8) | 0.0134 (9) | 0.0004 (8) |
C5 | 0.0510 (12) | 0.0548 (12) | 0.0437 (11) | −0.0029 (9) | 0.0143 (9) | 0.0068 (9) |
C6 | 0.0555 (13) | 0.0580 (13) | 0.0411 (11) | −0.0120 (10) | 0.0215 (9) | −0.0062 (9) |
C7 | 0.0452 (11) | 0.0439 (10) | 0.0493 (12) | −0.0058 (8) | 0.0224 (9) | −0.0119 (9) |
C8 | 0.0361 (9) | 0.0316 (9) | 0.0415 (10) | −0.0068 (7) | 0.0128 (8) | −0.0078 (7) |
C9 | 0.0348 (10) | 0.0339 (9) | 0.0626 (13) | 0.0007 (7) | 0.0217 (9) | −0.0127 (8) |
C10 | 0.0335 (14) | 0.0252 (12) | 0.086 (2) | 0.0000 | 0.0227 (14) | 0.0000 |
S1—C1 | 1.6945 (19) | C5—C6 | 1.384 (3) |
O1—C8 | 1.375 (2) | C6—C7 | 1.380 (3) |
O1—C9 | 1.441 (2) | C7—C8 | 1.399 (3) |
N1—C1 | 1.326 (2) | C9—C10 | 1.503 (2) |
N2—N3 | 1.374 (2) | C2—H2 | 0.9500 |
N2—C1 | 1.341 (2) | C4—H4 | 0.9500 |
N3—C2 | 1.280 (2) | C5—H5 | 0.9500 |
N1—H1A | 0.9100 | C6—H6 | 0.9500 |
N1—H1B | 0.9100 | C7—H7 | 0.9500 |
C2—C3 | 1.460 (3) | C9—H9A | 0.9900 |
N2—H2A | 0.9100 | C9—H9B | 0.9900 |
C3—C4 | 1.391 (3) | C10—H10A | 0.970 (19) |
C3—C8 | 1.398 (3) | C10—H10Ai | 0.970 (19) |
C4—C5 | 1.383 (3) | ||
C8—O1—C9 | 116.91 (14) | O1—C9—C10 | 107.97 (14) |
N3—N2—C1 | 119.38 (15) | C9—C10—C9i | 114.84 (19) |
N2—N3—C2 | 115.31 (15) | N3—C2—H2 | 120.00 |
S1—C1—N1 | 122.17 (14) | C3—C2—H2 | 120.00 |
S1—C1—N2 | 120.20 (13) | C3—C4—H4 | 119.00 |
N1—C1—N2 | 117.62 (16) | C5—C4—H4 | 119.00 |
H1A—N1—H1B | 119.00 | C4—C5—H5 | 120.00 |
C1—N1—H1B | 120.00 | C6—C5—H5 | 120.00 |
C1—N1—H1A | 120.00 | C5—C6—H6 | 120.00 |
C1—N2—H2A | 127.00 | C7—C6—H6 | 120.00 |
N3—N2—H2A | 113.00 | C6—C7—H7 | 120.00 |
N3—C2—C3 | 120.78 (16) | C8—C7—H7 | 120.00 |
C4—C3—C8 | 118.49 (17) | O1—C9—H9A | 110.00 |
C2—C3—C8 | 120.12 (16) | O1—C9—H9B | 110.00 |
C2—C3—C4 | 121.38 (17) | C10—C9—H9A | 110.00 |
C3—C4—C5 | 121.55 (19) | C10—C9—H9B | 110.00 |
C4—C5—C6 | 119.26 (19) | H9A—C9—H9B | 108.00 |
C5—C6—C7 | 120.71 (19) | C9—C10—H10A | 107.0 (12) |
C6—C7—C8 | 119.81 (19) | C9—C10—H10Ai | 112.0 (12) |
O1—C8—C3 | 116.25 (16) | C9i—C10—H10A | 112.0 (12) |
C3—C8—C7 | 120.18 (17) | H10A—C10—H10Ai | 103.6 (17) |
O1—C8—C7 | 123.57 (17) | C9i—C10—H10Ai | 107.0 (12) |
C9—O1—C8—C3 | −172.46 (16) | C2—C3—C8—O1 | −2.2 (3) |
C9—O1—C8—C7 | 6.8 (3) | C2—C3—C8—C7 | 178.46 (18) |
C8—O1—C9—C10 | 172.29 (14) | C4—C3—C8—O1 | 178.61 (16) |
C1—N2—N3—C2 | −178.70 (16) | C4—C3—C8—C7 | −0.7 (3) |
N3—N2—C1—S1 | 177.07 (13) | C3—C4—C5—C6 | 0.0 (3) |
N3—N2—C1—N1 | −2.2 (2) | C4—C5—C6—C7 | −0.3 (3) |
N2—N3—C2—C3 | 177.81 (16) | C5—C6—C7—C8 | 0.1 (3) |
N3—C2—C3—C4 | −3.1 (3) | C6—C7—C8—O1 | −178.85 (18) |
N3—C2—C3—C8 | 177.76 (17) | C6—C7—C8—C3 | 0.4 (3) |
C2—C3—C4—C5 | −178.67 (18) | O1—C9—C10—C9i | −59.22 (16) |
C8—C3—C4—C5 | 0.5 (3) |
Symmetry code: (i) −x+1, y, −z+3/2. |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···N3 | 0.91 | 2.27 | 2.631 (2) | 103 |
N1—H1A···S1ii | 0.91 | 2.64 | 3.3393 (16) | 135 |
N1—H1B···O1iii | 0.91 | 2.20 | 3.1046 (19) | 176 |
N2—H2A···S1iv | 0.91 | 2.49 | 3.3909 (16) | 171 |
Symmetry codes: (ii) x, −y+1, z−1/2; (iii) −x+1/2, y+1/2, −z+3/2; (iv) −x+1/2, −y+1/2, −z+2. |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···N3 | 0.9100 | 2.2700 | 2.631 (2) | 103 |
N1—H1A···S1i | 0.9100 | 2.6400 | 3.3393 (16) | 135 |
N1—H1B···O1ii | 0.9100 | 2.2000 | 3.1046 (19) | 176 |
N2—H2A···S1iii | 0.9100 | 2.4900 | 3.3909 (16) | 171 |
Symmetry codes: (i) x, −y+1, z−1/2; (ii) −x+1/2, y+1/2, −z+3/2; (iii) −x+1/2, −y+1/2, −z+2. |
Acknowledgements
The support of NSF–MRI (grant No. 1228232) for the purchase of the diffractometer and Tulane University for support of the Tulane Crystallography Laboratory are gratefully acknowledged.
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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.
Currently, bis-thiosemicarbazones is considerable interest in their biological activity (Singh et al., 2001; Offiong & Martelli, 1997) and have been known for over 50 years. Thiosemicarbazones have been reported to exhibit antivirals and as anticancer therapeutics, as well as for their parasiticidal action against Plasmodium falciparum and Trypanasoma cruzi which are the causative agents of malarya and Chagas' disease, respectively (Greenbaum et al., 2004; Finch et al., 1999; Wilson et al., 1974; Du et al., 2002). In addition, in the last few years there has been a growing attention towards thiosemicarbazones related to their range of biological properties, as antituberculosis activity (Desai et al., 1984; Shucla et al., 1984), antitumor (Vrdoljak et al., 2010), antiproliferative (Belicchi-Ferrari et al., 2010), and anticancer agents (Marzano et al., 2009). Such facts inspired us to synthesis and study the crystal structure determination of the title compound.
The title molecule has crystallographically imposed C2 symmetry (Fig. 1). The dihedral angle between the planes of the benzene rings is 75.20 (7)°. Significant N1—H1B···O1i (i: 1.5 - x, -1/2 + y, 1/2 - z) hydrogen bonds are formed in the crystal as well as weaker N2—H2A···S1ii (ii: 1.5 - x, 1.5 - y, -z) and N1—H1A···S1iii (iii: x 1 - y, 1/2 + z) interactions (Fig. 2). These lead to the formation of channels running parallel to the c axis (Fig. 3).