organic compounds
3-(4-Methylphenyl)-4-[(thiosemicarbazono)methyl]-1,2,3-oxadiazol-3-ium-5-olate 1,4-dioxane hemisolvate
aDepartment of PG Studies in Chemistry, Government Science College, Hassan 573 201, India, and bX-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
*Correspondence e-mail: arazaki@usm.my
The 11H11N5O2S·0.5C4H8O2, contains one 3-(p-tolyl)sydnone 4-thiosemicarbazone molecule and a half molecule of 1,4-dioxane, which lies abount an inversion centre. The sydnone ring is almost planar, with a maximum deviation of 0.002 (1) Å, and forms a dihedral angle of 46.31 (5)° with the benzene ring. In the crystal, the two components are linked into a tape along [01-1] by N—H⋯O and N—H⋯S hydrogen bonds. The is further stabilized by C—H⋯O and C—H⋯π interactions, forming a three-dimensional network.
of the title compound, CRelated literature
For the biological acitivity of et al. (2008); Jyothi et al. (2008); Nithinchandra et al. (2012); Kalluraya et al. (2001). For a related structure, see: Fun et al. (2011). For the stability of the temperature controller used for the data collection, see: Cosier & Glazer (1986).
see: RaiExperimental
Crystal data
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Data collection: APEX2 (Bruker, 2009); cell SAINT (Bruker, 2009); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2009).
Supporting information
https://doi.org/10.1107/S1600536813008805/is5258sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536813008805/is5258Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536813008805/is5258Isup3.cml
To a mixture of 4-formyl-3-(p-tolyl)sydnone (0.01 mol) and thiosemicarbazide (0.01 mol) in ethanol, a catalytic amount of concentrated H2SO4 was added. The solution was stirred at room temperature for 23 h. The solid product that separated out was filtered and dried. The recrystallization of the sample was done using an ethanol-dioxane (1:1 v/v) mixture. The slow evaporation of the ethanol-dioxane mixture of the compound resulted in crystals suitable for X-ray analysis.
N-bound H atoms were located in a difference Fourier map and were refined freely [N—H = 0.868 (17) to 0.872 (18) Å]. The remaining H atoms were located geometrically and were refined using a riding model with Uiso(H) = 1.2 or 1.5Ueq(C) (C—H = 0.95 to 0.99 Å). A rotating group model was applied to the methyl group. In the final
two outliners (-3 6 14 and 1 8 14) were omitted.Sydnones are mesoionic heterocyclic aromatic compounds. The study of
still remains a field of interest because of their electronic structures and also because of the varied types of biological activities displayed by some of them (Rai et al., 2008). Recently sydnone derivatives were found to exhibit promising antimicrobial (Jyothi et al., 2008), anti-inflammatory (Nithinchandra et al., 2012) and CNS depressant properties (Kalluraya et al., 2001). Since their discovery, have shown diverse biological activities and it is thought that the meso-ionic nature of the sydnone ring promotes significant interactions with biological systems.The
of the title compound, Fig. 1, contains one 3-(p-tolyl)-sydnone-4-thiosemicarbazone molecule and half of a 1,4-dioxane molecule. The sydnone ring (N1/N2/O1/C7/C8) is almost planar with maximum deviation of 0.002 (1) Å at O1 and it forms dihedral angle of 46.31 (5)° with the benzene ring (C1–C6).The complete 1–4 dioxane molecule is generated by crystallograhic inversion symmetry [symmetry code = -x, -y, -z + 2]. Bond lengths and angles are almost comparable with the related structure (Fun et al., 2011).In the π interactions (Table 1), involving the centroid of the benzene ring (Cg1).
Fig. 2, the molecules are linked into three dimensional network by intermolecular N4—H1N4···O3, N5—H1N5···S1, C5—H5A···O2, C9—H9A···O3 and C12—H12B···O2 hydrogen bonds (Table 1). The was further stabilized by C—H···For the biological acitivity of
see: Rai et al. (2008); Jyothi et al. (2008); Nithinchandra et al. (2012); Kalluraya et al. (2001). For a related structure, see: Fun et al. (2011). For the stability of the temperature controller used for the data collection, see: Cosier & Glazer (1986).Data collection: APEX2 (Bruker, 2009); cell
SAINT (Bruker, 2009); data reduction: SAINT (Bruker, 2009); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).Fig. 1. The molecular structure of the title compound, showing 50% probability displacement ellipsoids. | |
Fig. 2. The crystal packing of the title compound, viewed along the b axis. H atoms not involved in the intermolecular interactions (dashed lines) have been omitted for clarity. |
C11H11N5O2S·0.5C4H8O2 | Z = 2 |
Mr = 321.36 | F(000) = 336 |
Triclinic, P1 | Dx = 1.432 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 7.7463 (1) Å | Cell parameters from 9931 reflections |
b = 9.3776 (1) Å | θ = 2.2–32.7° |
c = 10.4449 (2) Å | µ = 0.24 mm−1 |
α = 79.689 (1)° | T = 100 K |
β = 87.168 (1)° | Block, yellow |
γ = 87.461 (1)° | 0.35 × 0.29 × 0.24 mm |
V = 745.09 (2) Å3 |
Bruker APEXII CCD area-detector diffractometer | 5407 independent reflections |
Radiation source: fine-focus sealed tube | 4782 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.021 |
φ and ω scans | θmax = 32.7°, θmin = 2.0° |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | h = −11→11 |
Tmin = 0.921, Tmax = 0.944 | k = −14→14 |
19865 measured reflections | l = −15→15 |
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)] = 0.035 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.090 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.08 | w = 1/[σ2(Fo2) + (0.0369P)2 + 0.310P] where P = (Fo2 + 2Fc2)/3 |
5407 reflections | (Δ/σ)max = 0.002 |
212 parameters | Δρmax = 0.43 e Å−3 |
0 restraints | Δρmin = −0.24 e Å−3 |
C11H11N5O2S·0.5C4H8O2 | γ = 87.461 (1)° |
Mr = 321.36 | V = 745.09 (2) Å3 |
Triclinic, P1 | Z = 2 |
a = 7.7463 (1) Å | Mo Kα radiation |
b = 9.3776 (1) Å | µ = 0.24 mm−1 |
c = 10.4449 (2) Å | T = 100 K |
α = 79.689 (1)° | 0.35 × 0.29 × 0.24 mm |
β = 87.168 (1)° |
Bruker APEXII CCD area-detector diffractometer | 5407 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | 4782 reflections with I > 2σ(I) |
Tmin = 0.921, Tmax = 0.944 | Rint = 0.021 |
19865 measured reflections |
R[F2 > 2σ(F2)] = 0.035 | 0 restraints |
wR(F2) = 0.090 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.08 | Δρmax = 0.43 e Å−3 |
5407 reflections | Δρmin = −0.24 e Å−3 |
212 parameters |
Experimental. The crystal was placed in the cold stream of an Oxford Cryosystems Cobra open-flow nitrogen cryostat (Cosier & Glazer, 1986) operating at 100.0 (1) K. |
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'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 > σ(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 | 1.09153 (3) | 0.32862 (3) | −0.33706 (2) | 0.01659 (6) | |
O1 | 0.47671 (10) | 0.67385 (8) | 0.20795 (7) | 0.01898 (15) | |
O2 | 0.57636 (11) | 0.75787 (8) | 0.00058 (8) | 0.02035 (15) | |
N1 | 0.59090 (11) | 0.46077 (9) | 0.24338 (8) | 0.01427 (15) | |
N2 | 0.48951 (12) | 0.54926 (10) | 0.29962 (9) | 0.01841 (17) | |
N3 | 0.79973 (11) | 0.49150 (9) | −0.07807 (8) | 0.01443 (15) | |
N4 | 0.91376 (11) | 0.40423 (9) | −0.13781 (8) | 0.01460 (15) | |
N5 | 0.90336 (13) | 0.57238 (10) | −0.32586 (9) | 0.01962 (17) | |
C1 | 0.68059 (14) | 0.31717 (11) | 0.44782 (10) | 0.01739 (18) | |
H1A | 0.6855 | 0.4040 | 0.4823 | 0.021* | |
C2 | 0.72069 (14) | 0.18334 (11) | 0.52322 (10) | 0.01834 (18) | |
H2A | 0.7512 | 0.1787 | 0.6109 | 0.022* | |
C3 | 0.71703 (13) | 0.05535 (11) | 0.47262 (10) | 0.01713 (18) | |
C4 | 0.66732 (14) | 0.06363 (11) | 0.34462 (10) | 0.01855 (18) | |
H4A | 0.6633 | −0.0228 | 0.3095 | 0.022* | |
C5 | 0.62369 (14) | 0.19592 (11) | 0.26773 (10) | 0.01751 (18) | |
H5A | 0.5883 | 0.2008 | 0.1812 | 0.021* | |
C6 | 0.63314 (13) | 0.32100 (10) | 0.32082 (9) | 0.01490 (17) | |
C7 | 0.57264 (13) | 0.65882 (11) | 0.09278 (10) | 0.01562 (17) | |
C8 | 0.64729 (12) | 0.51563 (10) | 0.11978 (9) | 0.01360 (16) | |
C9 | 0.76555 (12) | 0.44016 (10) | 0.04353 (9) | 0.01363 (16) | |
H9A | 0.8197 | 0.3512 | 0.0827 | 0.016* | |
C10 | 0.96088 (12) | 0.44310 (10) | −0.26539 (9) | 0.01415 (16) | |
C11 | 0.76728 (15) | −0.08866 (12) | 0.55341 (11) | 0.0222 (2) | |
H11A | 0.6967 | −0.1643 | 0.5313 | 0.033* | |
H11B | 0.7480 | −0.0838 | 0.6460 | 0.033* | |
H11C | 0.8898 | −0.1117 | 0.5356 | 0.033* | |
O3 | −0.07175 (11) | 0.12953 (8) | 1.03347 (8) | 0.02138 (16) | |
C12 | 0.07792 (15) | 0.05932 (12) | 1.09562 (11) | 0.0217 (2) | |
H12A | 0.0419 | −0.0077 | 1.1759 | 0.026* | |
H12B | 0.1517 | 0.1328 | 1.1203 | 0.026* | |
C13 | −0.17918 (15) | 0.02410 (13) | 0.99557 (12) | 0.0237 (2) | |
H13A | −0.2815 | 0.0737 | 0.9518 | 0.028* | |
H13B | −0.2203 | −0.0436 | 1.0739 | 0.028* | |
H1N4 | 0.947 (2) | 0.3189 (18) | −0.0967 (16) | 0.028 (4)* | |
H1N5 | 0.919 (2) | 0.5963 (19) | −0.4101 (18) | 0.036 (4)* | |
H2N5 | 0.826 (2) | 0.6209 (18) | −0.2864 (16) | 0.030 (4)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.02010 (12) | 0.01732 (11) | 0.01242 (10) | 0.00041 (8) | 0.00249 (8) | −0.00394 (8) |
O1 | 0.0199 (3) | 0.0181 (3) | 0.0193 (3) | 0.0032 (3) | 0.0007 (3) | −0.0054 (3) |
O2 | 0.0241 (4) | 0.0157 (3) | 0.0206 (4) | 0.0000 (3) | −0.0040 (3) | −0.0009 (3) |
N1 | 0.0148 (3) | 0.0160 (3) | 0.0123 (3) | −0.0012 (3) | 0.0019 (3) | −0.0038 (3) |
N2 | 0.0190 (4) | 0.0195 (4) | 0.0168 (4) | 0.0016 (3) | 0.0036 (3) | −0.0054 (3) |
N3 | 0.0155 (3) | 0.0152 (3) | 0.0129 (3) | −0.0005 (3) | 0.0013 (3) | −0.0036 (3) |
N4 | 0.0182 (4) | 0.0145 (3) | 0.0107 (3) | 0.0008 (3) | 0.0022 (3) | −0.0021 (3) |
N5 | 0.0247 (4) | 0.0181 (4) | 0.0139 (4) | 0.0032 (3) | 0.0046 (3) | 0.0006 (3) |
C1 | 0.0214 (4) | 0.0179 (4) | 0.0133 (4) | −0.0031 (4) | 0.0020 (3) | −0.0042 (3) |
C2 | 0.0215 (5) | 0.0214 (4) | 0.0123 (4) | −0.0021 (4) | −0.0009 (3) | −0.0031 (3) |
C3 | 0.0170 (4) | 0.0184 (4) | 0.0149 (4) | −0.0002 (3) | 0.0018 (3) | −0.0007 (3) |
C4 | 0.0240 (5) | 0.0168 (4) | 0.0153 (4) | −0.0014 (4) | 0.0013 (3) | −0.0042 (3) |
C5 | 0.0224 (5) | 0.0180 (4) | 0.0125 (4) | −0.0027 (4) | 0.0012 (3) | −0.0037 (3) |
C6 | 0.0166 (4) | 0.0155 (4) | 0.0121 (4) | −0.0018 (3) | 0.0025 (3) | −0.0015 (3) |
C7 | 0.0158 (4) | 0.0161 (4) | 0.0160 (4) | −0.0012 (3) | −0.0012 (3) | −0.0056 (3) |
C8 | 0.0149 (4) | 0.0138 (4) | 0.0120 (4) | −0.0007 (3) | 0.0013 (3) | −0.0026 (3) |
C9 | 0.0148 (4) | 0.0139 (4) | 0.0124 (4) | −0.0012 (3) | 0.0007 (3) | −0.0032 (3) |
C10 | 0.0149 (4) | 0.0155 (4) | 0.0122 (4) | −0.0027 (3) | 0.0012 (3) | −0.0026 (3) |
C11 | 0.0242 (5) | 0.0199 (5) | 0.0206 (5) | 0.0029 (4) | −0.0003 (4) | 0.0004 (4) |
O3 | 0.0263 (4) | 0.0143 (3) | 0.0233 (4) | 0.0020 (3) | 0.0021 (3) | −0.0041 (3) |
C12 | 0.0271 (5) | 0.0205 (5) | 0.0178 (5) | −0.0019 (4) | −0.0015 (4) | −0.0036 (4) |
C13 | 0.0207 (5) | 0.0227 (5) | 0.0281 (5) | 0.0016 (4) | −0.0007 (4) | −0.0060 (4) |
S1—C10 | 1.6893 (10) | C3—C11 | 1.5051 (14) |
O1—N2 | 1.3749 (12) | C4—C5 | 1.3897 (14) |
O1—C7 | 1.4079 (12) | C4—H4A | 0.9500 |
O2—C7 | 1.2126 (12) | C5—C6 | 1.3903 (14) |
N1—N2 | 1.3122 (11) | C5—H5A | 0.9500 |
N1—C8 | 1.3597 (12) | C7—C8 | 1.4244 (13) |
N1—C6 | 1.4449 (13) | C8—C9 | 1.4306 (13) |
N3—C9 | 1.2939 (12) | C9—H9A | 0.9500 |
N3—N4 | 1.3797 (11) | C11—H11A | 0.9800 |
N4—C10 | 1.3534 (12) | C11—H11B | 0.9800 |
N4—H1N4 | 0.871 (16) | C11—H11C | 0.9800 |
N5—C10 | 1.3316 (13) | O3—C12 | 1.4329 (14) |
N5—H1N5 | 0.872 (18) | O3—C13 | 1.4395 (14) |
N5—H2N5 | 0.868 (17) | C12—C13i | 1.5076 (16) |
C1—C6 | 1.3878 (14) | C12—H12A | 0.9900 |
C1—C2 | 1.3884 (14) | C12—H12B | 0.9900 |
C1—H1A | 0.9500 | C13—C12i | 1.5076 (16) |
C2—C3 | 1.3972 (14) | C13—H13A | 0.9900 |
C2—H2A | 0.9500 | C13—H13B | 0.9900 |
C3—C4 | 1.3974 (14) | ||
N2—O1—C7 | 111.07 (7) | O2—C7—C8 | 135.35 (10) |
N2—N1—C8 | 114.90 (8) | O1—C7—C8 | 104.14 (8) |
N2—N1—C6 | 116.69 (8) | N1—C8—C7 | 105.26 (8) |
C8—N1—C6 | 128.37 (8) | N1—C8—C9 | 123.94 (9) |
N1—N2—O1 | 104.63 (7) | C7—C8—C9 | 130.70 (9) |
C9—N3—N4 | 113.44 (8) | N3—C9—C8 | 120.84 (9) |
C10—N4—N3 | 120.28 (8) | N3—C9—H9A | 119.6 |
C10—N4—H1N4 | 118.9 (11) | C8—C9—H9A | 119.6 |
N3—N4—H1N4 | 120.4 (11) | N5—C10—N4 | 117.10 (9) |
C10—N5—H1N5 | 119.6 (12) | N5—C10—S1 | 124.08 (7) |
C10—N5—H2N5 | 119.2 (11) | N4—C10—S1 | 118.81 (7) |
H1N5—N5—H2N5 | 118.8 (15) | C3—C11—H11A | 109.5 |
C6—C1—C2 | 118.34 (9) | C3—C11—H11B | 109.5 |
C6—C1—H1A | 120.8 | H11A—C11—H11B | 109.5 |
C2—C1—H1A | 120.8 | C3—C11—H11C | 109.5 |
C1—C2—C3 | 121.26 (9) | H11A—C11—H11C | 109.5 |
C1—C2—H2A | 119.4 | H11B—C11—H11C | 109.5 |
C3—C2—H2A | 119.4 | C12—O3—C13 | 110.28 (8) |
C2—C3—C4 | 118.66 (9) | O3—C12—C13i | 109.89 (9) |
C2—C3—C11 | 120.90 (9) | O3—C12—H12A | 109.7 |
C4—C3—C11 | 120.44 (9) | C13i—C12—H12A | 109.7 |
C5—C4—C3 | 121.25 (9) | O3—C12—H12B | 109.7 |
C5—C4—H4A | 119.4 | C13i—C12—H12B | 109.7 |
C3—C4—H4A | 119.4 | H12A—C12—H12B | 108.2 |
C4—C5—C6 | 118.22 (9) | O3—C13—C12i | 109.94 (9) |
C4—C5—H5A | 120.9 | O3—C13—H13A | 109.7 |
C6—C5—H5A | 120.9 | C12i—C13—H13A | 109.7 |
C1—C6—C5 | 122.23 (9) | O3—C13—H13B | 109.7 |
C1—C6—N1 | 117.89 (9) | C12i—C13—H13B | 109.7 |
C5—C6—N1 | 119.87 (9) | H13A—C13—H13B | 108.2 |
O2—C7—O1 | 120.50 (9) | ||
C8—N1—N2—O1 | −0.38 (11) | N2—O1—C7—O2 | 179.80 (9) |
C6—N1—N2—O1 | 177.55 (8) | N2—O1—C7—C8 | −0.36 (10) |
C7—O1—N2—N1 | 0.46 (10) | N2—N1—C8—C7 | 0.17 (11) |
C9—N3—N4—C10 | 179.48 (9) | C6—N1—C8—C7 | −177.48 (9) |
C6—C1—C2—C3 | 1.24 (16) | N2—N1—C8—C9 | 176.73 (9) |
C1—C2—C3—C4 | −1.73 (16) | C6—N1—C8—C9 | −0.92 (16) |
C1—C2—C3—C11 | 177.64 (10) | O2—C7—C8—N1 | 179.92 (12) |
C2—C3—C4—C5 | 0.61 (16) | O1—C7—C8—N1 | 0.12 (10) |
C11—C3—C4—C5 | −178.75 (10) | O2—C7—C8—C9 | 3.7 (2) |
C3—C4—C5—C6 | 0.93 (16) | O1—C7—C8—C9 | −176.11 (10) |
C2—C1—C6—C5 | 0.39 (15) | N4—N3—C9—C8 | −178.91 (8) |
C2—C1—C6—N1 | 179.72 (9) | N1—C8—C9—N3 | 172.48 (9) |
C4—C5—C6—C1 | −1.46 (15) | C7—C8—C9—N3 | −11.90 (16) |
C4—C5—C6—N1 | 179.22 (9) | N3—N4—C10—N5 | 5.06 (14) |
N2—N1—C6—C1 | −45.36 (13) | N3—N4—C10—S1 | −176.46 (7) |
C8—N1—C6—C1 | 132.25 (11) | C13—O3—C12—C13i | 58.64 (12) |
N2—N1—C6—C5 | 133.99 (10) | C12—O3—C13—C12i | −58.67 (12) |
C8—N1—C6—C5 | −48.40 (14) |
Symmetry code: (i) −x, −y, −z+2. |
Cg1 is the centroid of the C1–C6 benzene ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
N4—H1N4···O3ii | 0.872 (17) | 2.040 (17) | 2.8624 (12) | 156.8 (14) |
N5—H1N5···S1iii | 0.872 (18) | 2.613 (18) | 3.4754 (9) | 170.2 (14) |
C5—H5A···O2iv | 0.95 | 2.31 | 3.2215 (13) | 162 |
C9—H9A···O3ii | 0.95 | 2.34 | 3.1394 (12) | 141 |
C12—H12B···O2v | 0.99 | 2.56 | 3.2626 (14) | 128 |
C11—H11A···Cg1vi | 0.98 | 2.94 | 3.5736 (12) | 123 |
Symmetry codes: (ii) x+1, y, z−1; (iii) −x+2, −y+1, −z−1; (iv) −x+1, −y+1, −z; (v) −x+1, −y+1, −z+1; (vi) −x+1, −y, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C11H11N5O2S·0.5C4H8O2 |
Mr | 321.36 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 100 |
a, b, c (Å) | 7.7463 (1), 9.3776 (1), 10.4449 (2) |
α, β, γ (°) | 79.689 (1), 87.168 (1), 87.461 (1) |
V (Å3) | 745.09 (2) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.24 |
Crystal size (mm) | 0.35 × 0.29 × 0.24 |
Data collection | |
Diffractometer | Bruker APEXII CCD area-detector |
Absorption correction | Multi-scan (SADABS; Bruker, 2009) |
Tmin, Tmax | 0.921, 0.944 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 19865, 5407, 4782 |
Rint | 0.021 |
(sin θ/λ)max (Å−1) | 0.759 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.035, 0.090, 1.08 |
No. of reflections | 5407 |
No. of parameters | 212 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.43, −0.24 |
Computer programs: APEX2 (Bruker, 2009), SAINT (Bruker, 2009), SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).
Cg1 is the centroid of the C1–C6 benzene ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
N4—H1N4···O3i | 0.872 (17) | 2.040 (17) | 2.8624 (12) | 156.8 (14) |
N5—H1N5···S1ii | 0.872 (18) | 2.613 (18) | 3.4754 (9) | 170.2 (14) |
C5—H5A···O2iii | 0.95 | 2.31 | 3.2215 (13) | 162 |
C9—H9A···O3i | 0.95 | 2.34 | 3.1394 (12) | 141 |
C12—H12B···O2iv | 0.99 | 2.56 | 3.2626 (14) | 128 |
C11—H11A···Cg1v | 0.98 | 2.94 | 3.5736 (12) | 123 |
Symmetry codes: (i) x+1, y, z−1; (ii) −x+2, −y+1, −z−1; (iii) −x+1, −y+1, −z; (iv) −x+1, −y+1, −z+1; (v) −x+1, −y, −z+1. |
Acknowledgements
The authors thank Universiti Sains Malaysia (USM) for the Research University Grant (1001/PFIZIK/811160). WSL also thanks the Malaysian Government and USM for the award of the post of Research Officer under the Research University Grant (1001/PFIZIK/811160).
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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.
Sydnones are mesoionic heterocyclic aromatic compounds. The study of sydnones still remains a field of interest because of their electronic structures and also because of the varied types of biological activities displayed by some of them (Rai et al., 2008). Recently sydnone derivatives were found to exhibit promising antimicrobial (Jyothi et al., 2008), anti-inflammatory (Nithinchandra et al., 2012) and CNS depressant properties (Kalluraya et al., 2001). Since their discovery, sydnones have shown diverse biological activities and it is thought that the meso-ionic nature of the sydnone ring promotes significant interactions with biological systems.
The asymmetric unit of the title compound, Fig. 1, contains one 3-(p-tolyl)-sydnone-4-thiosemicarbazone molecule and half of a 1,4-dioxane molecule. The sydnone ring (N1/N2/O1/C7/C8) is almost planar with maximum deviation of 0.002 (1) Å at O1 and it forms dihedral angle of 46.31 (5)° with the benzene ring (C1–C6).The complete 1–4 dioxane molecule is generated by crystallograhic inversion symmetry [symmetry code = -x, -y, -z + 2]. Bond lengths and angles are almost comparable with the related structure (Fun et al., 2011).
In the crystal structure, Fig. 2, the molecules are linked into three dimensional network by intermolecular N4—H1N4···O3, N5—H1N5···S1, C5—H5A···O2, C9—H9A···O3 and C12—H12B···O2 hydrogen bonds (Table 1). The crystal structure was further stabilized by C—H···π interactions (Table 1), involving the centroid of the benzene ring (Cg1).