organic compounds
(Z)-4-(3-Fluorophenyl)-1-(5-nitro-2-oxoindolin-3-ylidene)thiosemicarbazide
aBahauddin Zakariya University, Department of Chemistry, Multan 60800, Pakistan, and bUniversity of Sargodha, Department of Physics, Sargodha, Pakistan
*Correspondence e-mail: dmntahir_uos@yahoo.com
In the title compound, C15H10FN5O3S, an intramolecular N—H⋯N hydrogen bond generates an S(5) ring, whereas N—H⋯O and C—H⋯S interactions complete S(6) ring motifs. The dihedral angle between the isatin ring system and the fluorobenzene ring is 5.96 (6)° and the complete molecule is close to planar (r.m.s. deviation for all the non-H atoms = 0.112 Å). In the crystal, molecules are linked by N—H⋯O hydrogen bonds to form C(8) chains along the [100] direction and C—H⋯O interactions are also observed.
Related literature
For background to isatin derivatives, see: Pervez et al. (2010); Pervez, Ramzan et al. (2011); Pervez, Saira et al. (2011). For related structures, see: Pervez et al. (2009); Ramzan et al. (2010). For graph-set notation, see: Bernstein et al. (1995).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2007); cell SAINT (Bruker, 2007); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997) and PLATON (Spek, 2009); software used to prepare material for publication: WinGX (Farrugia, 1999) and PLATON.
Supporting information
10.1107/S1600536812005053/hb6630sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536812005053/hb6630Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536812005053/hb6630Isup3.cml
To a hot solution of 5-nitroisatin (0.48 g, 2.5 mmol) in 50% aqueous ethanol (30 ml) containing a catalytic quantity (3–4 drops) of glacial acetic acid was added 3-fluorophenythiosemicarbazide (0.46 g, 2.5 mmol) dissolved in ethanol (10 ml) and the reaction mixture was refluxed for 2 h. The orange crystalline solid formed during refluxing was collected by suction filtration. Thorough washing with hot aqueous ethanol provided the title compound (I) in pure form (0.77 g, 86%), m.p. 511 K. Orange prisms were grown in ethyl acetate-petroleum ether by diffusion method.
The H-atoms were positioned geometrically (N–H = 0.86 Å, C–H = 0.93 Å) and refined as riding with Uiso(H) = xUeq(C, N), where x = 1.2 for all H-atoms.
Data collection: APEX2 (Bruker, 2007); cell
SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997) and PLATON (Spek, 2009); software used to prepare material for publication: WinGX (Farrugia, 1999) and PLATON (Spek, 2009).Fig. 1. View of the title compound with displacement ellipsoids drawn at the 50% probability level. The dotted lines indicate the intra-molecular H-bondings. | |
Fig. 2. Packing diagram of the title compound (PLATON: Spek, 2009) showing that molecules form one dimensional polymeric chains along [100] and are interlinked. |
C15H10FN5O3S | F(000) = 1472 |
Mr = 359.34 | Dx = 1.590 Mg m−3 |
Orthorhombic, Pbca | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ac 2ab | Cell parameters from 3101 reflections |
a = 18.2485 (5) Å | θ = 2.2–28.3° |
b = 8.8043 (2) Å | µ = 0.26 mm−1 |
c = 18.6913 (5) Å | T = 296 K |
V = 3003.04 (13) Å3 | Prism, orange |
Z = 8 | 0.30 × 0.25 × 0.20 mm |
Bruker Kappa APEXII CCD diffractometer | 3728 independent reflections |
Radiation source: fine-focus sealed tube | 3101 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.027 |
Detector resolution: 7.50 pixels mm-1 | θmax = 28.3°, θmin = 2.2° |
ω scans | h = −24→21 |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | k = −8→11 |
Tmin = 0.957, Tmax = 0.966 | l = −24→24 |
53231 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)] = 0.037 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.102 | H-atom parameters constrained |
S = 1.06 | w = 1/[σ2(Fo2) + (0.045P)2 + 1.1466P] where P = (Fo2 + 2Fc2)/3 |
3728 reflections | (Δ/σ)max < 0.001 |
226 parameters | Δρmax = 0.19 e Å−3 |
0 restraints | Δρmin = −0.28 e Å−3 |
C15H10FN5O3S | V = 3003.04 (13) Å3 |
Mr = 359.34 | Z = 8 |
Orthorhombic, Pbca | Mo Kα radiation |
a = 18.2485 (5) Å | µ = 0.26 mm−1 |
b = 8.8043 (2) Å | T = 296 K |
c = 18.6913 (5) Å | 0.30 × 0.25 × 0.20 mm |
Bruker Kappa APEXII CCD diffractometer | 3728 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | 3101 reflections with I > 2σ(I) |
Tmin = 0.957, Tmax = 0.966 | Rint = 0.027 |
53231 measured reflections |
R[F2 > 2σ(F2)] = 0.037 | 0 restraints |
wR(F2) = 0.102 | H-atom parameters constrained |
S = 1.06 | Δρmax = 0.19 e Å−3 |
3728 reflections | Δρmin = −0.28 e Å−3 |
226 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 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 | 0.23197 (2) | 0.67952 (5) | −0.04002 (2) | 0.0468 (1) | |
F1 | 0.41277 (8) | 1.02225 (17) | −0.14952 (9) | 0.1015 (6) | |
O1 | 0.14958 (6) | 0.37037 (13) | 0.13575 (6) | 0.0491 (4) | |
O2 | 0.50290 (8) | 0.02530 (18) | 0.34644 (8) | 0.0759 (5) | |
O3 | 0.53143 (7) | 0.1873 (2) | 0.26498 (9) | 0.0811 (6) | |
N1 | 0.36565 (7) | 0.62197 (15) | 0.01839 (7) | 0.0421 (4) | |
N2 | 0.26518 (6) | 0.51166 (14) | 0.06902 (6) | 0.0388 (3) | |
N3 | 0.31021 (6) | 0.43761 (13) | 0.11392 (6) | 0.0361 (3) | |
N4 | 0.19541 (6) | 0.21196 (13) | 0.22400 (7) | 0.0379 (3) | |
N5 | 0.48641 (8) | 0.11444 (18) | 0.29912 (8) | 0.0531 (4) | |
C1 | 0.41226 (8) | 0.72152 (17) | −0.01991 (8) | 0.0400 (4) | |
C2 | 0.38746 (9) | 0.8269 (2) | −0.06921 (10) | 0.0535 (5) | |
C3 | 0.43845 (11) | 0.9188 (2) | −0.10154 (11) | 0.0600 (6) | |
C4 | 0.51147 (11) | 0.9129 (2) | −0.08870 (11) | 0.0608 (6) | |
C5 | 0.53538 (10) | 0.8073 (2) | −0.03948 (10) | 0.0599 (6) | |
C6 | 0.48660 (9) | 0.7113 (2) | −0.00505 (9) | 0.0493 (5) | |
C7 | 0.29264 (8) | 0.60528 (15) | 0.01605 (7) | 0.0363 (4) | |
C8 | 0.28008 (7) | 0.34713 (15) | 0.15985 (7) | 0.0329 (3) | |
C9 | 0.20008 (7) | 0.31556 (15) | 0.16965 (8) | 0.0358 (4) | |
C10 | 0.26468 (7) | 0.17306 (15) | 0.24998 (7) | 0.0336 (3) | |
C11 | 0.31818 (7) | 0.25505 (15) | 0.21213 (7) | 0.0324 (3) | |
C12 | 0.39169 (7) | 0.23766 (16) | 0.22778 (7) | 0.0365 (4) | |
C13 | 0.40880 (8) | 0.13552 (17) | 0.28157 (8) | 0.0402 (4) | |
C14 | 0.35672 (9) | 0.05368 (18) | 0.31899 (8) | 0.0445 (5) | |
C15 | 0.28301 (8) | 0.07168 (17) | 0.30351 (8) | 0.0412 (4) | |
H1 | 0.38771 | 0.56263 | 0.04792 | 0.0505* | |
H2 | 0.33789 | 0.83526 | −0.08008 | 0.0643* | |
H2A | 0.21856 | 0.50064 | 0.07329 | 0.0466* | |
H4 | 0.54402 | 0.97735 | −0.11205 | 0.0730* | |
H4A | 0.15495 | 0.17542 | 0.24013 | 0.0455* | |
H5 | 0.58513 | 0.80035 | −0.02920 | 0.0719* | |
H6 | 0.50361 | 0.64038 | 0.02787 | 0.0592* | |
H12 | 0.42774 | 0.29165 | 0.20349 | 0.0438* | |
H14 | 0.37122 | −0.01361 | 0.35464 | 0.0534* | |
H15 | 0.24724 | 0.01765 | 0.32818 | 0.0494* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0420 (2) | 0.0503 (2) | 0.0480 (2) | −0.0007 (2) | −0.0056 (2) | 0.0107 (2) |
F1 | 0.0892 (9) | 0.0919 (9) | 0.1234 (12) | 0.0074 (8) | 0.0314 (9) | 0.0678 (9) |
O1 | 0.0316 (5) | 0.0552 (7) | 0.0604 (7) | 0.0046 (5) | −0.0063 (5) | 0.0088 (5) |
O2 | 0.0683 (9) | 0.0887 (10) | 0.0707 (9) | 0.0296 (8) | −0.0231 (7) | 0.0079 (8) |
O3 | 0.0348 (6) | 0.1214 (14) | 0.0871 (10) | 0.0002 (7) | −0.0130 (7) | 0.0148 (10) |
N1 | 0.0375 (6) | 0.0419 (7) | 0.0469 (7) | 0.0005 (5) | 0.0005 (5) | 0.0107 (5) |
N2 | 0.0337 (6) | 0.0396 (6) | 0.0432 (6) | −0.0012 (5) | −0.0009 (5) | 0.0070 (5) |
N3 | 0.0362 (6) | 0.0333 (6) | 0.0389 (6) | 0.0002 (5) | −0.0010 (5) | 0.0017 (5) |
N4 | 0.0283 (5) | 0.0390 (6) | 0.0464 (6) | −0.0019 (5) | 0.0049 (5) | 0.0012 (5) |
N5 | 0.0425 (7) | 0.0670 (9) | 0.0498 (7) | 0.0149 (7) | −0.0125 (6) | −0.0093 (7) |
C1 | 0.0388 (7) | 0.0389 (7) | 0.0424 (7) | −0.0022 (6) | 0.0064 (6) | −0.0028 (6) |
C2 | 0.0431 (8) | 0.0528 (10) | 0.0647 (10) | 0.0002 (7) | 0.0091 (8) | 0.0175 (8) |
C3 | 0.0615 (11) | 0.0509 (10) | 0.0677 (11) | −0.0007 (8) | 0.0196 (9) | 0.0155 (8) |
C4 | 0.0591 (10) | 0.0562 (10) | 0.0672 (11) | −0.0165 (9) | 0.0247 (9) | −0.0065 (9) |
C5 | 0.0416 (9) | 0.0712 (12) | 0.0670 (11) | −0.0132 (8) | 0.0075 (8) | −0.0133 (10) |
C6 | 0.0422 (8) | 0.0554 (10) | 0.0504 (8) | −0.0035 (7) | −0.0001 (7) | −0.0041 (7) |
C7 | 0.0403 (7) | 0.0310 (6) | 0.0376 (7) | −0.0005 (5) | 0.0017 (5) | −0.0013 (5) |
C8 | 0.0294 (6) | 0.0326 (6) | 0.0368 (6) | 0.0004 (5) | −0.0009 (5) | −0.0013 (5) |
C9 | 0.0299 (6) | 0.0342 (7) | 0.0432 (7) | 0.0005 (5) | 0.0003 (5) | −0.0024 (6) |
C10 | 0.0320 (6) | 0.0326 (6) | 0.0362 (6) | 0.0011 (5) | 0.0026 (5) | −0.0045 (5) |
C11 | 0.0309 (6) | 0.0316 (6) | 0.0347 (6) | 0.0008 (5) | 0.0007 (5) | −0.0020 (5) |
C12 | 0.0308 (6) | 0.0401 (7) | 0.0387 (7) | −0.0002 (5) | −0.0007 (5) | −0.0031 (6) |
C13 | 0.0365 (7) | 0.0454 (8) | 0.0388 (7) | 0.0080 (6) | −0.0069 (6) | −0.0068 (6) |
C14 | 0.0532 (9) | 0.0428 (8) | 0.0375 (7) | 0.0086 (7) | −0.0030 (6) | 0.0023 (6) |
C15 | 0.0457 (8) | 0.0391 (7) | 0.0389 (7) | 0.0001 (6) | 0.0053 (6) | 0.0023 (6) |
S1—C7 | 1.6587 (14) | C3—C4 | 1.355 (3) |
F1—C3 | 1.361 (2) | C4—C5 | 1.379 (3) |
O1—C9 | 1.2180 (17) | C5—C6 | 1.386 (2) |
O2—N5 | 1.220 (2) | C8—C9 | 1.4974 (18) |
O3—N5 | 1.222 (2) | C8—C11 | 1.4476 (18) |
N1—C1 | 1.416 (2) | C10—C15 | 1.382 (2) |
N1—C7 | 1.3411 (19) | C10—C11 | 1.4053 (18) |
N2—N3 | 1.3434 (16) | C11—C12 | 1.3815 (18) |
N2—C7 | 1.3823 (18) | C12—C13 | 1.385 (2) |
N3—C8 | 1.2938 (17) | C13—C14 | 1.383 (2) |
N4—C9 | 1.3679 (19) | C14—C15 | 1.385 (2) |
N4—C10 | 1.3968 (17) | C2—H2 | 0.9300 |
N5—C13 | 1.466 (2) | C4—H4 | 0.9300 |
N1—H1 | 0.8600 | C5—H5 | 0.9300 |
N2—H2A | 0.8600 | C6—H6 | 0.9300 |
N4—H4A | 0.8600 | C12—H12 | 0.9300 |
C1—C6 | 1.388 (2) | C14—H14 | 0.9300 |
C1—C2 | 1.384 (2) | C15—H15 | 0.9300 |
C2—C3 | 1.373 (3) | ||
C1—N1—C7 | 130.41 (13) | O1—C9—C8 | 126.90 (13) |
N3—N2—C7 | 121.01 (11) | N4—C9—C8 | 105.98 (11) |
N2—N3—C8 | 116.96 (11) | O1—C9—N4 | 127.11 (12) |
C9—N4—C10 | 111.43 (11) | C11—C10—C15 | 121.88 (12) |
O2—N5—O3 | 123.39 (16) | N4—C10—C11 | 109.13 (11) |
O2—N5—C13 | 118.82 (14) | N4—C10—C15 | 128.99 (12) |
O3—N5—C13 | 117.79 (14) | C8—C11—C12 | 132.17 (12) |
C1—N1—H1 | 115.00 | C8—C11—C10 | 107.09 (11) |
C7—N1—H1 | 115.00 | C10—C11—C12 | 120.74 (12) |
N3—N2—H2A | 119.00 | C11—C12—C13 | 116.41 (12) |
C7—N2—H2A | 119.00 | N5—C13—C12 | 117.56 (13) |
C9—N4—H4A | 124.00 | N5—C13—C14 | 119.02 (14) |
C10—N4—H4A | 124.00 | C12—C13—C14 | 123.42 (14) |
N1—C1—C2 | 123.74 (14) | C13—C14—C15 | 120.15 (14) |
N1—C1—C6 | 116.49 (14) | C10—C15—C14 | 117.40 (13) |
C2—C1—C6 | 119.77 (14) | C1—C2—H2 | 121.00 |
C1—C2—C3 | 117.81 (16) | C3—C2—H2 | 121.00 |
F1—C3—C4 | 118.74 (17) | C3—C4—H4 | 121.00 |
C2—C3—C4 | 124.46 (18) | C5—C4—H4 | 121.00 |
F1—C3—C2 | 116.80 (17) | C4—C5—H5 | 119.00 |
C3—C4—C5 | 117.08 (18) | C6—C5—H5 | 119.00 |
C4—C5—C6 | 121.18 (17) | C1—C6—H6 | 120.00 |
C1—C6—C5 | 119.70 (16) | C5—C6—H6 | 120.00 |
S1—C7—N2 | 116.46 (11) | C11—C12—H12 | 122.00 |
S1—C7—N1 | 129.83 (11) | C13—C12—H12 | 122.00 |
N1—C7—N2 | 113.71 (12) | C13—C14—H14 | 120.00 |
C9—C8—C11 | 106.36 (11) | C15—C14—H14 | 120.00 |
N3—C8—C9 | 127.58 (12) | C10—C15—H15 | 121.00 |
N3—C8—C11 | 126.06 (12) | C14—C15—H15 | 121.00 |
C7—N1—C1—C2 | 0.8 (3) | C2—C3—C4—C5 | −0.3 (3) |
C7—N1—C1—C6 | 179.82 (15) | C3—C4—C5—C6 | 0.3 (3) |
C1—N1—C7—S1 | 8.9 (2) | C4—C5—C6—C1 | −0.3 (3) |
C1—N1—C7—N2 | −170.96 (14) | N3—C8—C9—O1 | −0.1 (2) |
C7—N2—N3—C8 | −177.01 (12) | N3—C8—C9—N4 | 179.51 (13) |
N3—N2—C7—S1 | 175.28 (10) | C11—C8—C9—O1 | −179.74 (14) |
N3—N2—C7—N1 | −4.80 (18) | C11—C8—C9—N4 | −0.17 (15) |
N2—N3—C8—C9 | −0.6 (2) | N3—C8—C11—C10 | −179.13 (13) |
N2—N3—C8—C11 | 179.00 (12) | N3—C8—C11—C12 | 0.3 (2) |
C10—N4—C9—O1 | 179.28 (14) | C9—C8—C11—C10 | 0.57 (14) |
C10—N4—C9—C8 | −0.30 (15) | C9—C8—C11—C12 | 179.97 (16) |
C9—N4—C10—C11 | 0.67 (16) | N4—C10—C11—C8 | −0.76 (15) |
C9—N4—C10—C15 | −179.04 (14) | N4—C10—C11—C12 | 179.74 (12) |
O2—N5—C13—C12 | 179.84 (15) | C15—C10—C11—C8 | 178.98 (13) |
O2—N5—C13—C14 | −0.1 (2) | C15—C10—C11—C12 | −0.5 (2) |
O3—N5—C13—C12 | −0.5 (2) | N4—C10—C15—C14 | 179.89 (14) |
O3—N5—C13—C14 | 179.53 (16) | C11—C10—C15—C14 | 0.2 (2) |
N1—C1—C2—C3 | 178.66 (16) | C8—C11—C12—C13 | −178.85 (14) |
C6—C1—C2—C3 | −0.3 (3) | C10—C11—C12—C13 | 0.5 (2) |
N1—C1—C6—C5 | −178.74 (15) | C11—C12—C13—N5 | 179.80 (13) |
C2—C1—C6—C5 | 0.3 (2) | C11—C12—C13—C14 | −0.2 (2) |
C1—C2—C3—F1 | −179.61 (16) | N5—C13—C14—C15 | 179.91 (14) |
C1—C2—C3—C4 | 0.3 (3) | C12—C13—C14—C15 | −0.1 (2) |
F1—C3—C4—C5 | 179.64 (17) | C13—C14—C15—C10 | 0.1 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···N3 | 0.86 | 2.18 | 2.6166 (17) | 112 |
N2—H2A···O1 | 0.86 | 2.06 | 2.7483 (16) | 136 |
N4—H4A···O3i | 0.86 | 2.26 | 3.0073 (17) | 146 |
C2—H2···S1 | 0.93 | 2.49 | 3.1674 (17) | 130 |
C4—H4···O1ii | 0.93 | 2.39 | 3.281 (2) | 161 |
C6—H6···O2iii | 0.93 | 2.56 | 3.392 (2) | 149 |
C12—H12···O2iii | 0.93 | 2.59 | 3.470 (2) | 158 |
Symmetry codes: (i) x−1/2, y, −z+1/2; (ii) x+1/2, −y+3/2, −z; (iii) −x+1, y+1/2, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C15H10FN5O3S |
Mr | 359.34 |
Crystal system, space group | Orthorhombic, Pbca |
Temperature (K) | 296 |
a, b, c (Å) | 18.2485 (5), 8.8043 (2), 18.6913 (5) |
V (Å3) | 3003.04 (13) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.26 |
Crystal size (mm) | 0.30 × 0.25 × 0.20 |
Data collection | |
Diffractometer | Bruker Kappa APEXII CCD diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2005) |
Tmin, Tmax | 0.957, 0.966 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 53231, 3728, 3101 |
Rint | 0.027 |
(sin θ/λ)max (Å−1) | 0.667 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.037, 0.102, 1.06 |
No. of reflections | 3728 |
No. of parameters | 226 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.19, −0.28 |
Computer programs: APEX2 (Bruker, 2007), SAINT (Bruker, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 1997) and PLATON (Spek, 2009), WinGX (Farrugia, 1999) and PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···N3 | 0.86 | 2.18 | 2.6166 (17) | 112 |
N2—H2A···O1 | 0.86 | 2.06 | 2.7483 (16) | 136 |
N4—H4A···O3i | 0.86 | 2.26 | 3.0073 (17) | 146 |
C2—H2···S1 | 0.93 | 2.49 | 3.1674 (17) | 130 |
C4—H4···O1ii | 0.93 | 2.39 | 3.281 (2) | 161 |
C6—H6···O2iii | 0.93 | 2.56 | 3.392 (2) | 149 |
C12—H12···O2iii | 0.93 | 2.59 | 3.470 (2) | 158 |
Symmetry codes: (i) x−1/2, y, −z+1/2; (ii) x+1/2, −y+3/2, −z; (iii) −x+1, y+1/2, −z+1/2. |
Acknowledgements
We acknowledge partial funding of this research work and the award of an Indigenous PhD scholarship to NM by the Higher Education Commission, Islamabad, Pakistan.
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.
In continuation of our earlier studies on some isatins-thiosemicarbazones (Pervez et al. 2010; Pervez, Ramzan et al., 2011; Pervez, Saira et al., 2011), we report herein the structure and synthesis of the title compound (I), (Fig. 1). When compared with the crystal structures of 1-(5-nitro-2-oxoindolin-3-ylidene)-4-o-tolylthiosemi carbazide (II) (Pervez et al., 2009) and 4-(3-fluorophenyl)-1-(2-oxoindolin-3-yl-idene)thiosemicarbazides (III) (Ramzan et al., 2010), it can be noticed that it differs from (II) by the presence of fluoro function at position-3 instead of methyl at position-2 of the phenyl ring attached to N of the thiosemicarbazone moiety and from (III) by the presence of nitro substituent at position-5 of the isatin scaffold.
In (I) the fluoro-phenyl group A (C1–C6/F1), thiosemicarbazone moiety B (N1/C7/S1/N2/N3) and 5-nitro-1,3-dihydro-2H-indol-2-one group C (C8–C15/N3–N5/O1–O3) are planar with r. m. s. deviations of 0.0019, 0.0245 and 0.0071 Å, respectively. The dihedral angle between A/B, A/C and B/C is 8.67 (7)°, 5.96 (6)° and 4.35 (5)°, respectively. Due to intramolecular H-bondings of N—H···O, N—H···N and C—H···S types (Table 1, Fig. 1), S(6), S(5) and S(6) ring motifs (Bernstein et al., 1995), respectively are formed. The molecules form C(8) chains (Bernstein et al., 1995) due to intermolecular H-bondings of N—H···O type (Table 1, Fig. 2) along [100] direction, where O-atom is of nitro and N–H is of 5-nitro-1,3-dihydro-2H -indol-2-one. The polymeric chains are connected throuh C—H···O bonds to form three-dimensional network (Table 1, Fig. 2).