organic compounds
3-Methyl-4-[2-(4-nitrophenyl)hydrazin-1-ylidene]-5-oxo-4,5-dihydro-1H-pyrazole-1-carbothioamide
aX-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia, and bDepartment of Studies in Chemistry, Mangalore University, Mangalagangotri, Mangalore 574 199, India
*Correspondence e-mail: hkfun@usm.my
The 11H10N6O3S, contains two independent molecules, each of which is stabilized by an intramolecular N—H⋯O hydrogen bond, forming an S(6) ring motif. In one molecule, the pyrazole ring forms a dihedral angle of 10.93 (14)° with the benzene ring. The corresponding dihedral angle in the other molecule is 7.03 (14)°. In the crystal, molecules are linked via pairs of (N,N)—H⋯O bifurcated acceptor bonds which, together with C—H⋯O hydrogen bonds, form sheets parallel to (001).
of the title compound, CRelated literature
For general background to and the pharmacological activity of pyrazole derivatives, see: Isloor et al. (2009); Rai et al. (2008); Bradbury & Pucci (2008); Girisha et al. (2010). For standard bond-length data, see: Allen et al. (1987). For the stability of the temperature controller used in the data collection, see Cosier & Glazer (1986). For hydrogen-bond motifs, see: Bernstein et al. (1995).
Experimental
Crystal data
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Refinement
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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/S1600536812027134/kj2205sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536812027134/kj2205Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536812027134/kj2205Isup3.cml
To a solution of ethyl-2-[(4-nitrophenyl)hydrazono]-3-oxobutanoate (0.01 mol) dissolved in glacial acetic acid (20 ml), a solution of thiosemicarbazide (0.02 mol) in glacial acetic acid (25 ml) was added and the mixture was refluxed for 4 h. This was cooled and allowed to stand overnight. The solid product which separated out was filtered and dried. It was then recrystallized from ethanol. Crystals suitable for X-ray analysis were obtained by slow evaporation of a solution of the title compound in a 1:2 mixture of DMF and ethanol.
N-bound H atoms were located in a difference Fourier map and refined freely [N–H = 0.84 (4)- 0.98 (4) Å]. The rest of hydrogen atoms were positioned geometrically and refined using a riding model with C–H = 0.95 or 0.98 Å and Uiso(H) = 1.2 or 1.5 Ueq(C). A rotating-group model was applied for the methyl groups.
The pyrazole ring is a prominent structural moiety found in numerous pharmaceutically active compounds. This is mainly due to the easy preparation and the important pharmacological activity. Therefore, the synthesis and selective functionalization of pyrazoles have been the focus of active research over the years (Isloor et al., 2009). Pyrazoles have been reported to possess antibacterial activity (Rai et al., 2008), and inhibitor activity against DNA gyrase and topoisomerase IV at their respective ATP-binding sites (Bradbury & Pucci, 2008). Moreover, pyrazole-containing compounds have received considerable attention owing to their diverse chemotherapeutic potentials including versatile anti-inflammatory and antimicrobial activities (Girisha et al., 2010). The synthetic route followed for obtaining the title compound involves the diazotization of substituted anilines to give the
followed by coupling with ethyl acetoacetate in the presence of sodium acetate to give the corresponding oxobutanoate which on further reaction with thiosemicarbazide in acetic acid gave the required thioamides.The
contains two independent molecules (Fig. 1), A and B. Each molecule is stabilized by an intramolecular N–H···O hydrogen bond (Table 1), forming a S(6) ring motif (Bernstein et al., 1995). In molecule A, the pyrazole ring (N2A/N3A/C2A-C4A) forms a dihedral angle of 10.93 (14)° with the benzene ring (C5A-C10A). The corresponding dihedral angle in the molecule B is 7.03 (14)°. Bond lengths (Allen et al., 1987) and angles are within normal ranges.In the crystal (Fig.2), molecules are linked via pairs of intermolecular N5B–H2N5···O3B, N1A–H1N1···O3B and N5A–H1N5···O3A, N1B–H3N1···O3A bifurcated acceptor bonds (Table 1) which together with C10B–H10B···O2A hydrogen bonds form two-dimensional sheets parallel to (001).
For general background to and the pharmacological activity of pyrazole derivatives, see: Isloor et al. (2009); Rai et al. (2008); Bradbury & Pucci (2008); Girisha et al. (2010). For standard bond-length data, see: Allen et al. (1987). For the stability of the temperature controller used in the data collection, see Cosier & Glazer (1986). For hydrogen-bond motifs, see: Bernstein et al. (1995).
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 for non-H atoms. Intramolecular bonds are shown as dashed lines. | |
Fig. 2. The crystal structure of the title compound, viewed along the b axis. H atoms not involved in hydrogen bonds (dashed lines) have been omitted for clarity. |
C11H10N6O3S | F(000) = 1264 |
Mr = 306.31 | Dx = 1.563 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 4616 reflections |
a = 11.5331 (4) Å | θ = 2.4–29.9° |
b = 17.2540 (6) Å | µ = 0.27 mm−1 |
c = 13.6025 (5) Å | T = 100 K |
β = 105.840 (2)° | Block, orange |
V = 2604.01 (16) Å3 | 0.23 × 0.19 × 0.13 mm |
Z = 8 |
Bruker SMART APEXII CCD area-detector diffractometer | 7706 independent reflections |
Radiation source: fine-focus sealed tube | 5153 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.086 |
φ and ω scans | θmax = 30.2°, θmin = 2.4° |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | h = −16→14 |
Tmin = 0.940, Tmax = 0.965 | k = −24→22 |
29927 measured reflections | l = −19→19 |
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)] = 0.074 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.187 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.05 | w = 1/[σ2(Fo2) + (0.0947P)2 + 0.6575P] where P = (Fo2 + 2Fc2)/3 |
7706 reflections | (Δ/σ)max = 0.001 |
405 parameters | Δρmax = 1.17 e Å−3 |
0 restraints | Δρmin = −0.45 e Å−3 |
C11H10N6O3S | V = 2604.01 (16) Å3 |
Mr = 306.31 | Z = 8 |
Monoclinic, P21/c | Mo Kα radiation |
a = 11.5331 (4) Å | µ = 0.27 mm−1 |
b = 17.2540 (6) Å | T = 100 K |
c = 13.6025 (5) Å | 0.23 × 0.19 × 0.13 mm |
β = 105.840 (2)° |
Bruker SMART APEXII CCD area-detector diffractometer | 7706 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | 5153 reflections with I > 2σ(I) |
Tmin = 0.940, Tmax = 0.965 | Rint = 0.086 |
29927 measured reflections |
R[F2 > 2σ(F2)] = 0.074 | 0 restraints |
wR(F2) = 0.187 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.05 | Δρmax = 1.17 e Å−3 |
7706 reflections | Δρmin = −0.45 e Å−3 |
405 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 esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds 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 > 2sigma(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 | ||
S1A | 0.49627 (7) | 0.07456 (4) | 0.34900 (6) | 0.02459 (18) | |
O1A | 1.23941 (18) | 0.56130 (12) | 0.40495 (19) | 0.0319 (5) | |
O2A | 1.10770 (18) | 0.65219 (11) | 0.39347 (18) | 0.0290 (5) | |
O3A | 0.67596 (17) | 0.21463 (11) | 0.36767 (15) | 0.0218 (4) | |
N1A | 0.2988 (2) | 0.15650 (15) | 0.3363 (2) | 0.0228 (5) | |
N2A | 0.46510 (19) | 0.22947 (12) | 0.34390 (17) | 0.0167 (4) | |
N3A | 0.38600 (19) | 0.29408 (12) | 0.33564 (18) | 0.0183 (5) | |
N4A | 0.65953 (19) | 0.38832 (13) | 0.35212 (16) | 0.0171 (4) | |
N5A | 0.77001 (19) | 0.36389 (13) | 0.36300 (17) | 0.0172 (4) | |
N6A | 1.1355 (2) | 0.58362 (13) | 0.39233 (18) | 0.0193 (5) | |
C1A | 0.4155 (2) | 0.15527 (14) | 0.3430 (2) | 0.0182 (5) | |
C2A | 0.5845 (2) | 0.25291 (14) | 0.35571 (19) | 0.0154 (5) | |
C3A | 0.5750 (2) | 0.33756 (14) | 0.35069 (19) | 0.0157 (5) | |
C4A | 0.4505 (2) | 0.35624 (14) | 0.3387 (2) | 0.0176 (5) | |
C5A | 0.8602 (2) | 0.41880 (14) | 0.36467 (19) | 0.0163 (5) | |
C6A | 0.9803 (2) | 0.39484 (15) | 0.3935 (2) | 0.0179 (5) | |
H6AA | 0.9996 | 0.3418 | 0.4083 | 0.021* | |
C7A | 1.0711 (2) | 0.44859 (15) | 0.4003 (2) | 0.0182 (5) | |
H7AA | 1.1532 | 0.4331 | 0.4194 | 0.022* | |
C8A | 1.0399 (2) | 0.52539 (15) | 0.37867 (19) | 0.0165 (5) | |
C9A | 0.9203 (2) | 0.55040 (15) | 0.3490 (2) | 0.0182 (5) | |
H9AA | 0.9015 | 0.6036 | 0.3349 | 0.022* | |
C10A | 0.8299 (2) | 0.49643 (15) | 0.3407 (2) | 0.0182 (5) | |
H10A | 0.7478 | 0.5118 | 0.3189 | 0.022* | |
C11A | 0.3981 (3) | 0.43569 (15) | 0.3332 (2) | 0.0253 (6) | |
H11A | 0.3103 | 0.4327 | 0.3057 | 0.038* | |
H11B | 0.4315 | 0.4681 | 0.2883 | 0.038* | |
H11C | 0.4181 | 0.4584 | 0.4017 | 0.038* | |
S1B | 0.01234 (7) | 1.16479 (4) | 0.38971 (6) | 0.02669 (19) | |
O1B | 0.77974 (19) | 0.69756 (14) | 0.4551 (2) | 0.0433 (7) | |
O2B | 0.65439 (19) | 0.60220 (12) | 0.43636 (18) | 0.0322 (5) | |
O3B | 0.19810 (17) | 1.02711 (11) | 0.41542 (15) | 0.0217 (4) | |
N1B | −0.1838 (2) | 1.07880 (16) | 0.3673 (2) | 0.0268 (6) | |
N2B | −0.0135 (2) | 1.00943 (12) | 0.37488 (17) | 0.0173 (4) | |
N3B | −0.0931 (2) | 0.94476 (12) | 0.35002 (17) | 0.0180 (5) | |
N4B | 0.1857 (2) | 0.85527 (12) | 0.37418 (16) | 0.0170 (4) | |
N5B | 0.2965 (2) | 0.88122 (13) | 0.39365 (18) | 0.0187 (5) | |
N6B | 0.6769 (2) | 0.67177 (14) | 0.43667 (19) | 0.0240 (5) | |
C1B | −0.0669 (3) | 1.08329 (14) | 0.3765 (2) | 0.0202 (5) | |
C2B | 0.1063 (2) | 0.98794 (14) | 0.39107 (19) | 0.0161 (5) | |
C3B | 0.0986 (2) | 0.90382 (14) | 0.3735 (2) | 0.0163 (5) | |
C4B | −0.0271 (2) | 0.88367 (14) | 0.3494 (2) | 0.0164 (5) | |
C5B | 0.3899 (2) | 0.82832 (15) | 0.39719 (19) | 0.0166 (5) | |
C6B | 0.5065 (2) | 0.85661 (15) | 0.4119 (2) | 0.0198 (5) | |
H6BA | 0.5207 | 0.9109 | 0.4151 | 0.024* | |
C7B | 0.6014 (2) | 0.80571 (16) | 0.4220 (2) | 0.0204 (5) | |
H7BA | 0.6814 | 0.8242 | 0.4319 | 0.024* | |
C8B | 0.5766 (2) | 0.72671 (15) | 0.4171 (2) | 0.0195 (5) | |
C9B | 0.4603 (2) | 0.69750 (15) | 0.3996 (2) | 0.0206 (5) | |
H9BA | 0.4462 | 0.6432 | 0.3947 | 0.025* | |
C10B | 0.3651 (2) | 0.74874 (14) | 0.3893 (2) | 0.0184 (5) | |
H10B | 0.2849 | 0.7303 | 0.3772 | 0.022* | |
C11B | −0.0786 (2) | 0.80485 (15) | 0.3263 (2) | 0.0227 (6) | |
H11D | −0.1666 | 0.8083 | 0.3017 | 0.034* | |
H11E | −0.0561 | 0.7731 | 0.3884 | 0.034* | |
H11F | −0.0470 | 0.7810 | 0.2735 | 0.034* | |
H2N1 | 0.263 (3) | 0.200 (2) | 0.335 (3) | 0.044 (11)* | |
H2N5 | 0.313 (3) | 0.936 (2) | 0.407 (2) | 0.032 (9)* | |
H1N1 | 0.261 (3) | 0.115 (2) | 0.349 (3) | 0.042 (11)* | |
H4N1 | −0.215 (4) | 1.035 (3) | 0.359 (3) | 0.049 (12)* | |
H1N5 | 0.788 (3) | 0.312 (2) | 0.370 (3) | 0.033 (9)* | |
H3N1 | −0.223 (3) | 1.122 (2) | 0.362 (3) | 0.038 (10)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1A | 0.0290 (4) | 0.0084 (3) | 0.0381 (4) | −0.0001 (3) | 0.0121 (3) | −0.0029 (3) |
O1A | 0.0179 (10) | 0.0187 (11) | 0.0617 (15) | −0.0028 (8) | 0.0156 (10) | −0.0040 (10) |
O2A | 0.0235 (10) | 0.0090 (9) | 0.0543 (14) | −0.0009 (8) | 0.0102 (10) | 0.0037 (8) |
O3A | 0.0193 (9) | 0.0125 (9) | 0.0339 (11) | 0.0033 (7) | 0.0080 (8) | −0.0001 (7) |
N1A | 0.0193 (12) | 0.0125 (11) | 0.0360 (14) | −0.0033 (9) | 0.0063 (10) | 0.0034 (10) |
N2A | 0.0182 (10) | 0.0062 (9) | 0.0275 (12) | 0.0016 (8) | 0.0091 (9) | 0.0004 (8) |
N3A | 0.0162 (10) | 0.0107 (10) | 0.0285 (12) | 0.0029 (8) | 0.0069 (9) | 0.0023 (8) |
N4A | 0.0166 (10) | 0.0135 (10) | 0.0218 (11) | −0.0006 (8) | 0.0061 (8) | −0.0002 (8) |
N5A | 0.0146 (10) | 0.0117 (10) | 0.0259 (12) | 0.0006 (8) | 0.0063 (9) | 0.0000 (8) |
N6A | 0.0181 (11) | 0.0132 (10) | 0.0281 (12) | −0.0011 (8) | 0.0089 (9) | 0.0009 (8) |
C1A | 0.0228 (13) | 0.0106 (11) | 0.0207 (13) | −0.0027 (10) | 0.0050 (10) | −0.0018 (9) |
C2A | 0.0168 (12) | 0.0111 (11) | 0.0203 (12) | −0.0003 (9) | 0.0081 (9) | 0.0003 (9) |
C3A | 0.0170 (12) | 0.0106 (11) | 0.0204 (12) | −0.0004 (9) | 0.0068 (9) | 0.0009 (9) |
C4A | 0.0186 (12) | 0.0114 (12) | 0.0244 (13) | −0.0001 (9) | 0.0088 (10) | 0.0009 (9) |
C5A | 0.0179 (12) | 0.0126 (12) | 0.0203 (13) | −0.0018 (9) | 0.0083 (10) | −0.0014 (9) |
C6A | 0.0187 (12) | 0.0127 (12) | 0.0224 (13) | 0.0014 (10) | 0.0060 (10) | 0.0014 (9) |
C7A | 0.0147 (12) | 0.0146 (12) | 0.0259 (14) | 0.0022 (9) | 0.0065 (10) | −0.0006 (10) |
C8A | 0.0166 (12) | 0.0130 (12) | 0.0211 (13) | −0.0029 (9) | 0.0074 (10) | −0.0022 (9) |
C9A | 0.0204 (12) | 0.0110 (11) | 0.0235 (13) | 0.0023 (9) | 0.0066 (10) | 0.0004 (9) |
C10A | 0.0183 (12) | 0.0135 (12) | 0.0239 (13) | 0.0027 (9) | 0.0076 (10) | 0.0012 (9) |
C11A | 0.0252 (14) | 0.0117 (12) | 0.0409 (17) | 0.0033 (11) | 0.0124 (12) | 0.0063 (11) |
S1B | 0.0341 (4) | 0.0078 (3) | 0.0424 (4) | 0.0005 (3) | 0.0175 (3) | 0.0010 (3) |
O1B | 0.0184 (10) | 0.0305 (13) | 0.084 (2) | 0.0083 (9) | 0.0201 (11) | 0.0189 (12) |
O2B | 0.0283 (11) | 0.0157 (10) | 0.0526 (14) | 0.0077 (9) | 0.0109 (10) | −0.0033 (9) |
O3B | 0.0201 (9) | 0.0125 (9) | 0.0339 (11) | −0.0004 (7) | 0.0098 (8) | 0.0006 (7) |
N1B | 0.0234 (12) | 0.0125 (12) | 0.0452 (16) | 0.0068 (10) | 0.0108 (11) | −0.0016 (10) |
N2B | 0.0198 (11) | 0.0070 (9) | 0.0268 (12) | −0.0001 (8) | 0.0095 (9) | 0.0000 (8) |
N3B | 0.0179 (10) | 0.0099 (10) | 0.0269 (12) | −0.0006 (8) | 0.0074 (9) | 0.0000 (8) |
N4B | 0.0198 (11) | 0.0116 (10) | 0.0204 (11) | 0.0015 (8) | 0.0067 (9) | 0.0020 (8) |
N5B | 0.0173 (10) | 0.0124 (10) | 0.0266 (12) | 0.0007 (8) | 0.0061 (9) | −0.0008 (8) |
N6B | 0.0201 (11) | 0.0223 (13) | 0.0327 (13) | 0.0078 (10) | 0.0123 (10) | 0.0054 (10) |
C1B | 0.0275 (14) | 0.0096 (11) | 0.0245 (14) | 0.0057 (10) | 0.0087 (11) | 0.0021 (9) |
C2B | 0.0197 (12) | 0.0091 (11) | 0.0211 (13) | 0.0008 (9) | 0.0081 (10) | 0.0035 (9) |
C3B | 0.0168 (12) | 0.0098 (11) | 0.0235 (13) | 0.0019 (9) | 0.0074 (10) | 0.0010 (9) |
C4B | 0.0192 (12) | 0.0093 (11) | 0.0214 (12) | 0.0007 (9) | 0.0069 (10) | 0.0001 (9) |
C5B | 0.0173 (12) | 0.0143 (12) | 0.0186 (12) | 0.0024 (9) | 0.0057 (9) | 0.0006 (9) |
C6B | 0.0210 (13) | 0.0135 (12) | 0.0250 (13) | −0.0005 (10) | 0.0061 (10) | 0.0034 (10) |
C7B | 0.0177 (12) | 0.0206 (13) | 0.0238 (13) | −0.0009 (10) | 0.0075 (10) | 0.0050 (10) |
C8B | 0.0216 (13) | 0.0163 (13) | 0.0226 (13) | 0.0070 (10) | 0.0095 (10) | 0.0022 (10) |
C9B | 0.0243 (13) | 0.0130 (12) | 0.0257 (14) | 0.0021 (10) | 0.0088 (11) | −0.0008 (10) |
C10B | 0.0177 (12) | 0.0139 (12) | 0.0244 (13) | 0.0010 (10) | 0.0074 (10) | 0.0015 (10) |
C11B | 0.0202 (13) | 0.0116 (12) | 0.0366 (16) | −0.0009 (10) | 0.0083 (11) | −0.0023 (10) |
S1A—C1A | 1.665 (3) | S1B—C1B | 1.660 (3) |
O1A—N6A | 1.226 (3) | O1B—N6B | 1.227 (3) |
O2A—N6A | 1.227 (3) | O2B—N6B | 1.228 (3) |
O3A—C2A | 1.218 (3) | O3B—C2B | 1.223 (3) |
N1A—C1A | 1.324 (4) | N1B—C1B | 1.322 (4) |
N1A—H2N1 | 0.85 (4) | N1B—H4N1 | 0.84 (4) |
N1A—H1N1 | 0.88 (4) | N1B—H3N1 | 0.86 (4) |
N2A—C1A | 1.401 (3) | N2B—C2B | 1.389 (3) |
N2A—C2A | 1.401 (3) | N2B—C1B | 1.418 (3) |
N2A—N3A | 1.425 (3) | N2B—N3B | 1.426 (3) |
N3A—C4A | 1.299 (3) | N3B—C4B | 1.302 (3) |
N4A—C3A | 1.306 (3) | N4B—C3B | 1.305 (3) |
N4A—N5A | 1.312 (3) | N4B—N5B | 1.312 (3) |
N5A—C5A | 1.403 (3) | N5B—C5B | 1.403 (3) |
N5A—H1N5 | 0.92 (4) | N5B—H2N5 | 0.98 (4) |
N6A—C8A | 1.465 (3) | N6B—C8B | 1.463 (3) |
C2A—C3A | 1.465 (3) | C2B—C3B | 1.470 (3) |
C3A—C4A | 1.438 (4) | C3B—C4B | 1.439 (3) |
C4A—C11A | 1.492 (4) | C4B—C11B | 1.483 (3) |
C5A—C6A | 1.395 (4) | C5B—C6B | 1.392 (4) |
C5A—C10A | 1.400 (4) | C5B—C10B | 1.401 (4) |
C6A—C7A | 1.383 (4) | C6B—C7B | 1.381 (4) |
C6A—H6AA | 0.9500 | C6B—H6BA | 0.9500 |
C7A—C8A | 1.383 (4) | C7B—C8B | 1.391 (4) |
C7A—H7AA | 0.9500 | C7B—H7BA | 0.9500 |
C8A—C9A | 1.396 (4) | C8B—C9B | 1.392 (4) |
C9A—C10A | 1.379 (4) | C9B—C10B | 1.386 (4) |
C9A—H9AA | 0.9500 | C9B—H9BA | 0.9500 |
C10A—H10A | 0.9500 | C10B—H10B | 0.9500 |
C11A—H11A | 0.9800 | C11B—H11D | 0.9800 |
C11A—H11B | 0.9800 | C11B—H11E | 0.9800 |
C11A—H11C | 0.9800 | C11B—H11F | 0.9800 |
C1A—N1A—H2N1 | 119 (3) | C1B—N1B—H4N1 | 117 (3) |
C1A—N1A—H1N1 | 122 (3) | C1B—N1B—H3N1 | 117 (2) |
H2N1—N1A—H1N1 | 117 (4) | H4N1—N1B—H3N1 | 125 (4) |
C1A—N2A—C2A | 130.6 (2) | C2B—N2B—C1B | 130.9 (2) |
C1A—N2A—N3A | 117.6 (2) | C2B—N2B—N3B | 112.16 (19) |
C2A—N2A—N3A | 111.77 (19) | C1B—N2B—N3B | 116.9 (2) |
C4A—N3A—N2A | 107.1 (2) | C4B—N3B—N2B | 107.2 (2) |
C3A—N4A—N5A | 118.9 (2) | C3B—N4B—N5B | 119.2 (2) |
N4A—N5A—C5A | 118.6 (2) | N4B—N5B—C5B | 118.8 (2) |
N4A—N5A—H1N5 | 121 (2) | N4B—N5B—H2N5 | 120 (2) |
C5A—N5A—H1N5 | 121 (2) | C5B—N5B—H2N5 | 121 (2) |
O1A—N6A—O2A | 123.4 (2) | O1B—N6B—O2B | 123.2 (2) |
O1A—N6A—C8A | 118.4 (2) | O1B—N6B—C8B | 118.3 (2) |
O2A—N6A—C8A | 118.2 (2) | O2B—N6B—C8B | 118.5 (2) |
N1A—C1A—N2A | 113.0 (2) | N1B—C1B—N2B | 112.5 (2) |
N1A—C1A—S1A | 124.1 (2) | N1B—C1B—S1B | 125.2 (2) |
N2A—C1A—S1A | 122.8 (2) | N2B—C1B—S1B | 122.3 (2) |
O3A—C2A—N2A | 130.3 (2) | O3B—C2B—N2B | 130.2 (2) |
O3A—C2A—C3A | 126.7 (2) | O3B—C2B—C3B | 126.8 (2) |
N2A—C2A—C3A | 103.0 (2) | N2B—C2B—C3B | 103.0 (2) |
N4A—C3A—C4A | 124.7 (2) | N4B—C3B—C4B | 124.9 (2) |
N4A—C3A—C2A | 128.5 (2) | N4B—C3B—C2B | 128.3 (2) |
C4A—C3A—C2A | 106.7 (2) | C4B—C3B—C2B | 106.7 (2) |
N3A—C4A—C3A | 111.3 (2) | N3B—C4B—C3B | 111.0 (2) |
N3A—C4A—C11A | 122.5 (2) | N3B—C4B—C11B | 122.9 (2) |
C3A—C4A—C11A | 126.2 (2) | C3B—C4B—C11B | 126.1 (2) |
C6A—C5A—C10A | 121.0 (2) | C6B—C5B—C10B | 121.6 (2) |
C6A—C5A—N5A | 118.6 (2) | C6B—C5B—N5B | 118.6 (2) |
C10A—C5A—N5A | 120.4 (2) | C10B—C5B—N5B | 119.8 (2) |
C7A—C6A—C5A | 119.7 (2) | C7B—C6B—C5B | 120.0 (2) |
C7A—C6A—H6AA | 120.1 | C7B—C6B—H6BA | 120.0 |
C5A—C6A—H6AA | 120.1 | C5B—C6B—H6BA | 120.0 |
C6A—C7A—C8A | 118.7 (2) | C6B—C7B—C8B | 118.1 (2) |
C6A—C7A—H7AA | 120.7 | C6B—C7B—H7BA | 121.0 |
C8A—C7A—H7AA | 120.7 | C8B—C7B—H7BA | 121.0 |
C7A—C8A—C9A | 122.5 (2) | C7B—C8B—C9B | 122.6 (2) |
C7A—C8A—N6A | 119.1 (2) | C7B—C8B—N6B | 119.0 (2) |
C9A—C8A—N6A | 118.3 (2) | C9B—C8B—N6B | 118.3 (2) |
C10A—C9A—C8A | 118.7 (2) | C10B—C9B—C8B | 119.1 (2) |
C10A—C9A—H9AA | 120.7 | C10B—C9B—H9BA | 120.5 |
C8A—C9A—H9AA | 120.7 | C8B—C9B—H9BA | 120.5 |
C9A—C10A—C5A | 119.5 (2) | C9B—C10B—C5B | 118.6 (2) |
C9A—C10A—H10A | 120.3 | C9B—C10B—H10B | 120.7 |
C5A—C10A—H10A | 120.3 | C5B—C10B—H10B | 120.7 |
C4A—C11A—H11A | 109.5 | C4B—C11B—H11D | 109.5 |
C4A—C11A—H11B | 109.5 | C4B—C11B—H11E | 109.5 |
H11A—C11A—H11B | 109.5 | H11D—C11B—H11E | 109.5 |
C4A—C11A—H11C | 109.5 | C4B—C11B—H11F | 109.5 |
H11A—C11A—H11C | 109.5 | H11D—C11B—H11F | 109.5 |
H11B—C11A—H11C | 109.5 | H11E—C11B—H11F | 109.5 |
C1A—N2A—N3A—C4A | 179.6 (2) | C2B—N2B—N3B—C4B | −0.5 (3) |
C2A—N2A—N3A—C4A | 1.9 (3) | C1B—N2B—N3B—C4B | 177.9 (2) |
C3A—N4A—N5A—C5A | −179.9 (2) | C3B—N4B—N5B—C5B | 178.2 (2) |
C2A—N2A—C1A—N1A | 176.0 (3) | C2B—N2B—C1B—N1B | −173.6 (3) |
N3A—N2A—C1A—N1A | −1.2 (3) | N3B—N2B—C1B—N1B | 8.4 (3) |
C2A—N2A—C1A—S1A | −4.4 (4) | C2B—N2B—C1B—S1B | 5.8 (4) |
N3A—N2A—C1A—S1A | 178.36 (18) | N3B—N2B—C1B—S1B | −172.19 (18) |
C1A—N2A—C2A—O3A | 0.5 (5) | C1B—N2B—C2B—O3B | 3.6 (5) |
N3A—N2A—C2A—O3A | 177.8 (3) | N3B—N2B—C2B—O3B | −178.3 (3) |
C1A—N2A—C2A—C3A | −179.3 (3) | C1B—N2B—C2B—C3B | −177.4 (3) |
N3A—N2A—C2A—C3A | −2.0 (3) | N3B—N2B—C2B—C3B | 0.7 (3) |
N5A—N4A—C3A—C4A | −179.6 (2) | N5B—N4B—C3B—C4B | 177.4 (2) |
N5A—N4A—C3A—C2A | −2.7 (4) | N5B—N4B—C3B—C2B | 0.7 (4) |
O3A—C2A—C3A—N4A | 4.2 (5) | O3B—C2B—C3B—N4B | −4.4 (5) |
N2A—C2A—C3A—N4A | −176.0 (3) | N2B—C2B—C3B—N4B | 176.5 (3) |
O3A—C2A—C3A—C4A | −178.5 (3) | O3B—C2B—C3B—C4B | 178.4 (3) |
N2A—C2A—C3A—C4A | 1.3 (3) | N2B—C2B—C3B—C4B | −0.7 (3) |
N2A—N3A—C4A—C3A | −0.9 (3) | N2B—N3B—C4B—C3B | 0.0 (3) |
N2A—N3A—C4A—C11A | −179.3 (2) | N2B—N3B—C4B—C11B | −179.9 (2) |
N4A—C3A—C4A—N3A | 177.2 (2) | N4B—C3B—C4B—N3B | −176.9 (3) |
C2A—C3A—C4A—N3A | −0.2 (3) | C2B—C3B—C4B—N3B | 0.4 (3) |
N4A—C3A—C4A—C11A | −4.5 (4) | N4B—C3B—C4B—C11B | 3.0 (4) |
C2A—C3A—C4A—C11A | 178.1 (3) | C2B—C3B—C4B—C11B | −179.7 (3) |
N4A—N5A—C5A—C6A | 169.2 (2) | N4B—N5B—C5B—C6B | 176.3 (2) |
N4A—N5A—C5A—C10A | −9.0 (4) | N4B—N5B—C5B—C10B | −5.8 (4) |
C10A—C5A—C6A—C7A | 1.1 (4) | C10B—C5B—C6B—C7B | −1.8 (4) |
N5A—C5A—C6A—C7A | −177.0 (2) | N5B—C5B—C6B—C7B | 176.1 (2) |
C5A—C6A—C7A—C8A | 0.4 (4) | C5B—C6B—C7B—C8B | −0.1 (4) |
C6A—C7A—C8A—C9A | −0.8 (4) | C6B—C7B—C8B—C9B | 2.0 (4) |
C6A—C7A—C8A—N6A | 175.9 (2) | C6B—C7B—C8B—N6B | −174.6 (2) |
O1A—N6A—C8A—C7A | 12.7 (4) | O1B—N6B—C8B—C7B | −1.2 (4) |
O2A—N6A—C8A—C7A | −165.3 (3) | O2B—N6B—C8B—C7B | 177.0 (3) |
O1A—N6A—C8A—C9A | −170.4 (3) | O1B—N6B—C8B—C9B | −177.9 (3) |
O2A—N6A—C8A—C9A | 11.6 (4) | O2B—N6B—C8B—C9B | 0.3 (4) |
C7A—C8A—C9A—C10A | −0.2 (4) | C7B—C8B—C9B—C10B | −1.9 (4) |
N6A—C8A—C9A—C10A | −177.0 (2) | N6B—C8B—C9B—C10B | 174.7 (2) |
C8A—C9A—C10A—C5A | 1.7 (4) | C8B—C9B—C10B—C5B | −0.1 (4) |
C6A—C5A—C10A—C9A | −2.2 (4) | C6B—C5B—C10B—C9B | 1.9 (4) |
N5A—C5A—C10A—C9A | 175.9 (2) | N5B—C5B—C10B—C9B | −175.9 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
N5B—H2N5···O3B | 0.97 (3) | 2.08 (3) | 2.810 (3) | 131 (3) |
N1A—H1N1···O3Bi | 0.88 (4) | 2.00 (4) | 2.859 (3) | 165 (4) |
N5A—H1N5···O3A | 0.92 (3) | 2.11 (4) | 2.802 (3) | 131 (3) |
N1B—H3N1···O3Aii | 0.87 (3) | 1.99 (4) | 2.848 (3) | 171 (3) |
C10B—H10B···O2Aiii | 0.95 | 2.51 | 3.418 (3) | 161 |
Symmetry codes: (i) x, y−1, z; (ii) x−1, y+1, z; (iii) x−1, y, z. |
Experimental details
Crystal data | |
Chemical formula | C11H10N6O3S |
Mr | 306.31 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 100 |
a, b, c (Å) | 11.5331 (4), 17.2540 (6), 13.6025 (5) |
β (°) | 105.840 (2) |
V (Å3) | 2604.01 (16) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.27 |
Crystal size (mm) | 0.23 × 0.19 × 0.13 |
Data collection | |
Diffractometer | Bruker SMART APEXII CCD area-detector |
Absorption correction | Multi-scan (SADABS; Bruker, 2009) |
Tmin, Tmax | 0.940, 0.965 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 29927, 7706, 5153 |
Rint | 0.086 |
(sin θ/λ)max (Å−1) | 0.708 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.074, 0.187, 1.05 |
No. of reflections | 7706 |
No. of parameters | 405 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 1.17, −0.45 |
Computer programs: APEX2 (Bruker, 2009), SAINT (Bruker, 2009), SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
N5B—H2N5···O3B | 0.97 (3) | 2.08 (3) | 2.810 (3) | 131 (3) |
N1A—H1N1···O3Bi | 0.88 (4) | 2.00 (4) | 2.859 (3) | 165 (4) |
N5A—H1N5···O3A | 0.92 (3) | 2.11 (4) | 2.802 (3) | 131 (3) |
N1B—H3N1···O3Aii | 0.87 (3) | 1.99 (4) | 2.848 (3) | 171 (3) |
C10B—H10B···O2Aiii | 0.9500 | 2.5100 | 3.418 (3) | 161.00 |
Symmetry codes: (i) x, y−1, z; (ii) x−1, y+1, z; (iii) x−1, y, z. |
Acknowledgements
The authors thank Universiti Sains Malaysia (USM) for the Research University Grant (No. 1001/PFIZIK/811160). CKQ also thanks USM for an Incentive Grant.
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 pyrazole ring is a prominent structural moiety found in numerous pharmaceutically active compounds. This is mainly due to the easy preparation and the important pharmacological activity. Therefore, the synthesis and selective functionalization of pyrazoles have been the focus of active research over the years (Isloor et al., 2009). Pyrazoles have been reported to possess antibacterial activity (Rai et al., 2008), and inhibitor activity against DNA gyrase and topoisomerase IV at their respective ATP-binding sites (Bradbury & Pucci, 2008). Moreover, pyrazole-containing compounds have received considerable attention owing to their diverse chemotherapeutic potentials including versatile anti-inflammatory and antimicrobial activities (Girisha et al., 2010). The synthetic route followed for obtaining the title compound involves the diazotization of substituted anilines to give the diazonium salts followed by coupling with ethyl acetoacetate in the presence of sodium acetate to give the corresponding oxobutanoate which on further reaction with thiosemicarbazide in acetic acid gave the required thioamides.
The asymmetric unit contains two independent molecules (Fig. 1), A and B. Each molecule is stabilized by an intramolecular N–H···O hydrogen bond (Table 1), forming a S(6) ring motif (Bernstein et al., 1995). In molecule A, the pyrazole ring (N2A/N3A/C2A-C4A) forms a dihedral angle of 10.93 (14)° with the benzene ring (C5A-C10A). The corresponding dihedral angle in the molecule B is 7.03 (14)°. Bond lengths (Allen et al., 1987) and angles are within normal ranges.
In the crystal (Fig.2), molecules are linked via pairs of intermolecular N5B–H2N5···O3B, N1A–H1N1···O3B and N5A–H1N5···O3A, N1B–H3N1···O3A bifurcated acceptor bonds (Table 1) which together with C10B–H10B···O2A hydrogen bonds form two-dimensional sheets parallel to (001).