organic compounds
1-(2,4-Difluorophenyl)thiourea
aX-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia, bDepartment of Studies in Chemistry, Mangalore University, Mangalagangotri 574 199, India, and cDepartment of Chemistry, P. A. College of Engineering, Nadupadavu, Mangalore 574 153, India
*Correspondence e-mail: hkfun@usm.my
The 7H6F2N2S, consists of two independent molecules, with comparable geometries. In one molecule, the thiourea moiety is essentially planar (r.m.s. deviation = 0.014 Å) and it forms a dihedral angle of 78.67 (9)° with the benzene ring. The corresponding r.m.s. deviation and dihedral angle for the other molecule are 0.011 Å and 81.71 (8)°, respectively. In both molecules, one of the F atoms is disordered over two positions with refined site occupancies of 0.572 (3):0.428 (3) and 0.909 (2):0.091 (2), respectively. In the crystal, molecules are linked via N—H⋯S and C—H⋯F hydrogen bonds into two-dimensional networks parallel to (010).
of the title compound, CRelated literature
For general background to and the related structures of the title compound, see: Fun et al. (2012a,b); Sarojini et al. (2007). For standard bond-length data, see: Allen et al. (1987). For the stability of the temperature controller used for the data collection, see: Cosier & Glazer (1986).
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/S1600536812031625/kj2208sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536812031625/kj2208Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536812031625/kj2208Isup3.cml
2,4-Difluoroaniline (0.84 mL, 0.0081 mol) was refluxed with potassium thiocyanate (1.4 g, 0.0142 mol) in 20 mL of water and 1.6 mL of concentrated HCl for 3 h. The reaction mixture was then cooled to room temperature and stirred overnight. The precipitated product was then filetred, washed with water, dried and recrystallised from acetone and toluene (1:1) mixture by slow evaporation method (m.p. 441-443K).
N-bound hydrogen atoms were located in a difference Fourier map and refined freely with N–H = 0.79 (2)–0.88 (2) Å. The remaining H atoms were positioned geometrically and refined using a riding model with C–H = 0.95 Å and Uiso(H) = 1.2 Ueq(C). The fluorine atoms (F1A/F1B) of both molecules are disordered over two positions with refined site-occupancies of 0.572 (3):0.428 (3) and 0.909 (2): 0.091 (2), respectively. The same Uij parameters were used for atom pair F1B/F1BX.
In continuation of our work on the synthesis of thiourea derivatives (Fun et al., 2012a, 2012b; Sarojini et al., 2007), the title compound is prepared and its
is reported here.The
(Fig. 1) of the title compound consists of two independent molecules (A and B), with comparable geometries. In molecule A, thiourea moiety (S1A/N1A/N2A/C7A) is essentially planar (r.m.s. deviation = 0.014 Å) and it forms a dihedral angle of 78.67 (9)° with the benzene ring (C1A-C6A). The corresponding r.m.s. deviation and dihedral angle for molecule B are 0.011 Å and 81.71 (8)°, respectively. Bond lengths (Allen et al., 1987) and angles are within normal ranges and are comparable to related structures (Fun et al., 2012a, 2012b). The fluorine atoms (F1A/F1B) of both molecules are disordered over two positions with refined site-occupancies of 0.572 (3):0.428 (3) and 0.909 (2): 0.091 (2), respectively.In the
Fig. 2, molecules are linked via intermolecular N—H···S and C—H···F hydrogen bonds (Table 1) into two-dimensional networks parallel to (010).For general background to and the related structures of the title compound, see: Fun et al. (2012a,b); Sarojini et al. (2007). For standard bond-length data, see: Allen et al. (1987). 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 asymmetric unit of the title compound showing 50% probability displacement ellipsoids for non-H atoms. Both major and minor disorder component are shown. | |
Fig. 2. The crystal structure of the title compound, viewed along the a axis. H atoms not involved in hydrogen bonds (dashed lines) have been omitted for clarity. Only major component of disorder is shown. |
C7H6F2N2S | F(000) = 768 |
Mr = 188.20 | Dx = 1.604 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 5197 reflections |
a = 6.4260 (7) Å | θ = 3.2–32.0° |
b = 36.908 (4) Å | µ = 0.39 mm−1 |
c = 6.6821 (7) Å | T = 100 K |
β = 100.464 (2)° | Plate, colourless |
V = 1558.4 (3) Å3 | 0.36 × 0.14 × 0.09 mm |
Z = 8 |
Bruker SMART APEXII DUO CCD area-detector diffractometer | 3553 independent reflections |
Radiation source: fine-focus sealed tube | 3082 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.031 |
φ and ω scans | θmax = 27.5°, θmin = 1.1° |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | h = −8→8 |
Tmin = 0.874, Tmax = 0.967 | k = −47→47 |
13654 measured reflections | l = −8→8 |
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)] = 0.033 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.077 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.06 | w = 1/[σ2(Fo2) + (0.0271P)2 + 1.0603P] where P = (Fo2 + 2Fc2)/3 |
3553 reflections | (Δ/σ)max = 0.001 |
255 parameters | Δρmax = 0.55 e Å−3 |
4 restraints | Δρmin = −0.36 e Å−3 |
C7H6F2N2S | V = 1558.4 (3) Å3 |
Mr = 188.20 | Z = 8 |
Monoclinic, P21/c | Mo Kα radiation |
a = 6.4260 (7) Å | µ = 0.39 mm−1 |
b = 36.908 (4) Å | T = 100 K |
c = 6.6821 (7) Å | 0.36 × 0.14 × 0.09 mm |
β = 100.464 (2)° |
Bruker SMART APEXII DUO CCD area-detector diffractometer | 3553 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | 3082 reflections with I > 2σ(I) |
Tmin = 0.874, Tmax = 0.967 | Rint = 0.031 |
13654 measured reflections |
R[F2 > 2σ(F2)] = 0.033 | 4 restraints |
wR(F2) = 0.077 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.06 | Δρmax = 0.55 e Å−3 |
3553 reflections | Δρmin = −0.36 e Å−3 |
255 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 | Occ. (<1) | |
F1A | 0.9955 (3) | 0.14057 (5) | 0.6462 (3) | 0.0235 (5) | 0.572 (3) |
F1AX | 0.4561 (4) | 0.21131 (7) | 0.3297 (4) | 0.0259 (7) | 0.428 (3) |
F2A | 1.13116 (19) | 0.26104 (3) | 0.46796 (18) | 0.0356 (3) | |
S1A | 0.59786 (6) | 0.167502 (10) | 0.91274 (6) | 0.01619 (10) | |
N1A | 0.5812 (2) | 0.14793 (4) | 0.5240 (2) | 0.0209 (3) | |
N2A | 0.4287 (3) | 0.10890 (4) | 0.7173 (3) | 0.0227 (3) | |
C1A | 0.9376 (3) | 0.17296 (5) | 0.5676 (3) | 0.0223 (4) | |
H1AA | 0.9899 | 0.1505 | 0.6251 | 0.027* | 0.428 (3) |
C2A | 1.0788 (3) | 0.20077 (5) | 0.5578 (3) | 0.0240 (4) | |
H2AA | 1.2258 | 0.1980 | 0.6090 | 0.029* | |
C3A | 0.9968 (3) | 0.23273 (5) | 0.4704 (3) | 0.0227 (4) | |
C4A | 0.7859 (3) | 0.23758 (5) | 0.3885 (3) | 0.0221 (4) | |
H4AA | 0.7357 | 0.2597 | 0.3246 | 0.027* | |
C5A | 0.6497 (3) | 0.20898 (5) | 0.4030 (3) | 0.0207 (4) | |
H5AA | 0.5035 | 0.2116 | 0.3475 | 0.025* | 0.572 (3) |
C6A | 0.7219 (3) | 0.17666 (4) | 0.4967 (3) | 0.0193 (3) | |
C7A | 0.5343 (2) | 0.13960 (4) | 0.7068 (3) | 0.0167 (3) | |
F1B | −0.1368 (2) | 0.05450 (3) | −0.13223 (17) | 0.0289 (3) | 0.909 (2) |
F1BX | −0.1259 (12) | 0.0838 (3) | 0.5203 (17) | 0.0289 (3) | 0.091 (2) |
F2B | −0.33235 (18) | −0.03440 (3) | 0.29943 (18) | 0.0313 (3) | |
S1B | 0.32399 (6) | 0.086866 (11) | 0.19944 (6) | 0.01690 (10) | |
N1B | −0.0833 (2) | 0.10552 (4) | 0.1680 (2) | 0.0178 (3) | |
N2B | 0.1372 (3) | 0.15004 (4) | 0.0948 (2) | 0.0204 (3) | |
C1B | −0.1715 (2) | 0.04402 (5) | 0.0510 (3) | 0.0195 (3) | |
H1BA | −0.1484 | 0.0513 | −0.0796 | 0.023* | 0.091 (2) |
C2B | −0.2367 (2) | 0.00890 (5) | 0.0765 (3) | 0.0207 (3) | |
H2BA | −0.2598 | −0.0080 | −0.0327 | 0.025* | |
C3B | −0.2663 (2) | −0.00024 (4) | 0.2694 (3) | 0.0201 (3) | |
C4B | −0.2367 (3) | 0.02342 (5) | 0.4308 (3) | 0.0226 (4) | |
H4BA | −0.2606 | 0.0161 | 0.5610 | 0.027* | |
C5B | −0.1706 (3) | 0.05838 (5) | 0.3979 (3) | 0.0205 (3) | |
H5BA | −0.1474 | 0.0752 | 0.5074 | 0.025* | 0.909 (2) |
C6B | −0.1382 (2) | 0.06909 (4) | 0.2074 (3) | 0.0163 (3) | |
C7B | 0.1138 (3) | 0.11572 (4) | 0.1495 (2) | 0.0157 (3) | |
H1NA | 0.538 (3) | 0.1354 (5) | 0.429 (3) | 0.018 (5)* | |
H2NA | 0.390 (3) | 0.0967 (6) | 0.617 (4) | 0.026 (6)* | |
H3NA | 0.396 (3) | 0.1029 (5) | 0.831 (3) | 0.020 (5)* | |
H1NB | −0.190 (3) | 0.1202 (6) | 0.124 (3) | 0.024 (5)* | |
H2NB | 0.028 (3) | 0.1640 (6) | 0.052 (3) | 0.026 (5)* | |
H3NB | 0.249 (4) | 0.1570 (6) | 0.067 (3) | 0.025 (6)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
F1A | 0.0242 (9) | 0.0180 (9) | 0.0258 (10) | 0.0068 (7) | −0.0019 (7) | 0.0057 (7) |
F1AX | 0.0195 (12) | 0.0277 (14) | 0.0287 (14) | 0.0035 (9) | 0.0000 (10) | 0.0036 (11) |
F2A | 0.0395 (6) | 0.0311 (6) | 0.0365 (7) | −0.0152 (5) | 0.0080 (5) | 0.0054 (5) |
S1A | 0.01840 (19) | 0.01375 (19) | 0.0162 (2) | −0.00093 (14) | 0.00254 (15) | −0.00129 (15) |
N1A | 0.0306 (8) | 0.0157 (7) | 0.0157 (7) | −0.0058 (6) | 0.0022 (6) | −0.0030 (6) |
N2A | 0.0322 (8) | 0.0169 (7) | 0.0195 (8) | −0.0079 (6) | 0.0057 (7) | −0.0034 (6) |
C1A | 0.0331 (9) | 0.0172 (8) | 0.0179 (8) | 0.0043 (7) | 0.0081 (7) | 0.0019 (7) |
C2A | 0.0246 (9) | 0.0289 (9) | 0.0195 (9) | 0.0003 (7) | 0.0072 (7) | 0.0013 (7) |
C3A | 0.0323 (9) | 0.0200 (8) | 0.0180 (8) | −0.0069 (7) | 0.0101 (7) | −0.0009 (7) |
C4A | 0.0350 (9) | 0.0161 (8) | 0.0162 (8) | 0.0014 (7) | 0.0070 (7) | 0.0025 (7) |
C5A | 0.0277 (9) | 0.0205 (8) | 0.0136 (8) | 0.0010 (7) | 0.0025 (7) | −0.0015 (7) |
C6A | 0.0297 (9) | 0.0151 (8) | 0.0137 (8) | −0.0027 (6) | 0.0060 (7) | −0.0024 (6) |
C7A | 0.0167 (7) | 0.0144 (7) | 0.0180 (8) | 0.0028 (6) | 0.0006 (6) | −0.0005 (6) |
F1B | 0.0454 (7) | 0.0278 (6) | 0.0145 (6) | −0.0080 (5) | 0.0084 (5) | −0.0017 (5) |
F1BX | 0.0454 (7) | 0.0278 (6) | 0.0145 (6) | −0.0080 (5) | 0.0084 (5) | −0.0017 (5) |
F2B | 0.0443 (7) | 0.0172 (5) | 0.0334 (6) | −0.0111 (5) | 0.0098 (5) | 0.0002 (5) |
S1B | 0.01641 (18) | 0.01577 (19) | 0.0178 (2) | 0.00075 (14) | 0.00125 (15) | −0.00053 (16) |
N1B | 0.0161 (7) | 0.0138 (7) | 0.0231 (7) | 0.0012 (5) | 0.0029 (6) | 0.0021 (6) |
N2B | 0.0190 (7) | 0.0161 (7) | 0.0265 (8) | 0.0003 (6) | 0.0053 (6) | 0.0039 (6) |
C1B | 0.0200 (8) | 0.0221 (8) | 0.0171 (8) | −0.0005 (6) | 0.0050 (6) | 0.0015 (7) |
C2B | 0.0230 (8) | 0.0189 (8) | 0.0205 (8) | −0.0031 (6) | 0.0044 (7) | −0.0052 (7) |
C3B | 0.0203 (8) | 0.0143 (8) | 0.0255 (9) | −0.0026 (6) | 0.0034 (7) | 0.0014 (7) |
C4B | 0.0285 (9) | 0.0215 (9) | 0.0176 (8) | −0.0020 (7) | 0.0034 (7) | 0.0022 (7) |
C5B | 0.0236 (8) | 0.0185 (8) | 0.0181 (8) | 0.0002 (6) | 0.0003 (7) | −0.0028 (7) |
C6B | 0.0125 (7) | 0.0137 (7) | 0.0224 (9) | 0.0004 (6) | 0.0020 (6) | 0.0002 (6) |
C7B | 0.0197 (8) | 0.0166 (8) | 0.0104 (7) | −0.0011 (6) | 0.0020 (6) | −0.0022 (6) |
F1A—C1A | 1.331 (2) | F1B—C1B | 1.341 (2) |
F1AX—C5A | 1.254 (3) | F1BX—C5B | 1.242 (12) |
F2A—C3A | 1.3572 (19) | F2B—C3B | 1.3567 (19) |
S1A—C7A | 1.7079 (17) | S1B—C7B | 1.7049 (16) |
N1A—C7A | 1.346 (2) | N1B—C7B | 1.348 (2) |
N1A—C6A | 1.427 (2) | N1B—C6B | 1.427 (2) |
N1A—H1NA | 0.79 (2) | N1B—H1NB | 0.88 (2) |
N2A—C7A | 1.329 (2) | N2B—C7B | 1.334 (2) |
N2A—H2NA | 0.81 (2) | N2B—H2NB | 0.88 (2) |
N2A—H3NA | 0.85 (2) | N2B—H3NB | 0.82 (2) |
C1A—C2A | 1.379 (3) | C1B—C2B | 1.382 (2) |
C1A—C6A | 1.387 (3) | C1B—C6B | 1.383 (2) |
C1A—H1AA | 0.9500 | C1B—H1BA | 0.9500 |
C2A—C3A | 1.377 (3) | C2B—C3B | 1.378 (3) |
C2A—H2AA | 0.9500 | C2B—H2BA | 0.9500 |
C3A—C4A | 1.379 (3) | C3B—C4B | 1.374 (2) |
C4A—C5A | 1.386 (2) | C4B—C5B | 1.389 (2) |
C4A—H4AA | 0.9500 | C4B—H4BA | 0.9500 |
C5A—C6A | 1.387 (2) | C5B—C6B | 1.384 (2) |
C5A—H5AA | 0.9500 | C5B—H5BA | 0.9500 |
C7A—N1A—C6A | 122.52 (15) | C7B—N1B—C6B | 123.25 (14) |
C7A—N1A—H1NA | 119.4 (15) | C7B—N1B—H1NB | 118.8 (14) |
C6A—N1A—H1NA | 117.9 (15) | C6B—N1B—H1NB | 116.1 (13) |
C7A—N2A—H2NA | 121.1 (16) | C7B—N2B—H2NB | 121.6 (14) |
C7A—N2A—H3NA | 118.6 (14) | C7B—N2B—H3NB | 120.5 (15) |
H2NA—N2A—H3NA | 120 (2) | H2NB—N2B—H3NB | 115 (2) |
F1A—C1A—C2A | 123.22 (18) | F1B—C1B—C2B | 119.17 (15) |
F1A—C1A—C6A | 114.43 (17) | F1B—C1B—C6B | 117.95 (15) |
C2A—C1A—C6A | 122.35 (16) | C2B—C1B—C6B | 122.88 (16) |
C2A—C1A—H1AA | 118.8 | C2B—C1B—H1BA | 118.6 |
C6A—C1A—H1AA | 118.8 | C6B—C1B—H1BA | 118.6 |
C3A—C2A—C1A | 116.96 (17) | C3B—C2B—C1B | 116.17 (16) |
C3A—C2A—H2AA | 121.5 | C3B—C2B—H2BA | 121.9 |
C1A—C2A—H2AA | 121.5 | C1B—C2B—H2BA | 121.9 |
F2A—C3A—C2A | 117.99 (16) | F2B—C3B—C4B | 118.46 (16) |
F2A—C3A—C4A | 118.49 (16) | F2B—C3B—C2B | 117.77 (15) |
C2A—C3A—C4A | 123.51 (17) | C4B—C3B—C2B | 123.76 (16) |
C3A—C4A—C5A | 117.47 (16) | C3B—C4B—C5B | 117.95 (16) |
C3A—C4A—H4AA | 121.3 | C3B—C4B—H4BA | 121.0 |
C5A—C4A—H4AA | 121.3 | C5B—C4B—H4BA | 121.0 |
F1AX—C5A—C4A | 120.96 (19) | F1BX—C5B—C6B | 109.6 (6) |
F1AX—C5A—C6A | 117.52 (19) | F1BX—C5B—C4B | 129.6 (6) |
C4A—C5A—C6A | 121.52 (17) | C6B—C5B—C4B | 120.84 (16) |
C4A—C5A—H5AA | 119.2 | C6B—C5B—H5BA | 119.6 |
C6A—C5A—H5AA | 119.2 | C4B—C5B—H5BA | 119.6 |
C5A—C6A—C1A | 118.07 (16) | C1B—C6B—C5B | 118.40 (15) |
C5A—C6A—N1A | 121.93 (16) | C1B—C6B—N1B | 120.01 (15) |
C1A—C6A—N1A | 120.00 (15) | C5B—C6B—N1B | 121.51 (15) |
N2A—C7A—N1A | 116.32 (16) | N2B—C7B—N1B | 116.42 (15) |
N2A—C7A—S1A | 121.39 (14) | N2B—C7B—S1B | 121.45 (13) |
N1A—C7A—S1A | 122.25 (13) | N1B—C7B—S1B | 122.11 (12) |
F1A—C1A—C2A—C3A | 179.30 (18) | F1B—C1B—C2B—C3B | 179.05 (14) |
C6A—C1A—C2A—C3A | −1.0 (3) | C6B—C1B—C2B—C3B | −0.44 (14) |
C1A—C2A—C3A—F2A | 176.87 (16) | C1B—C2B—C3B—F2B | 179.36 (14) |
C1A—C2A—C3A—C4A | −2.1 (3) | C1B—C2B—C3B—C4B | 0.66 (15) |
F2A—C3A—C4A—C5A | −176.43 (15) | F2B—C3B—C4B—C5B | −179.51 (14) |
C2A—C3A—C4A—C5A | 2.5 (3) | C2B—C3B—C4B—C5B | −0.8 (2) |
C3A—C4A—C5A—F1AX | −179.1 (2) | C3B—C4B—C5B—F1BX | −176.9 (4) |
C3A—C4A—C5A—C6A | 0.2 (3) | C3B—C4B—C5B—C6B | 0.7 (2) |
F1AX—C5A—C6A—C1A | 176.2 (2) | F1B—C1B—C6B—C5B | −179.09 (14) |
C4A—C5A—C6A—C1A | −3.1 (3) | C2B—C1B—C6B—C5B | 0.4 (2) |
F1AX—C5A—C6A—N1A | −4.8 (3) | F1B—C1B—C6B—N1B | 4.3 (2) |
C4A—C5A—C6A—N1A | 175.88 (16) | C2B—C1B—C6B—N1B | −176.21 (13) |
F1A—C1A—C6A—C5A | −176.79 (16) | F1BX—C5B—C6B—C1B | 177.5 (4) |
C2A—C1A—C6A—C5A | 3.5 (3) | C4B—C5B—C6B—C1B | −0.6 (2) |
F1A—C1A—C6A—N1A | 4.3 (2) | F1BX—C5B—C6B—N1B | −5.9 (4) |
C2A—C1A—C6A—N1A | −175.43 (16) | C4B—C5B—C6B—N1B | 176.01 (15) |
C7A—N1A—C6A—C5A | −107.0 (2) | C7B—N1B—C6B—C1B | −79.0 (2) |
C7A—N1A—C6A—C1A | 71.9 (2) | C7B—N1B—C6B—C5B | 104.47 (19) |
C6A—N1A—C7A—N2A | −169.70 (16) | C6B—N1B—C7B—N2B | 174.25 (15) |
C6A—N1A—C7A—S1A | 12.6 (2) | C6B—N1B—C7B—S1B | −7.4 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1A—H1NA···S1B | 0.794 (19) | 2.586 (19) | 3.3485 (15) | 161.7 (19) |
N2A—H2NA···S1B | 0.81 (2) | 2.77 (3) | 3.499 (2) | 151 (2) |
N2A—H3NA···S1Bi | 0.85 (2) | 2.65 (2) | 3.504 (2) | 175.2 (16) |
N1B—H1NB···S1Aii | 0.88 (2) | 2.49 (2) | 3.3273 (15) | 158.9 (17) |
N2B—H2NB···S1Aii | 0.88 (2) | 2.76 (2) | 3.5179 (19) | 146.4 (18) |
N2B—H3NB···S1Aiii | 0.82 (3) | 2.66 (3) | 3.4592 (19) | 167 (2) |
C4B—H4BA···F1Bi | 0.95 | 2.50 | 3.094 (2) | 121 |
C5B—H5BA···F1Bi | 0.95 | 2.52 | 3.111 (2) | 121 |
Symmetry codes: (i) x, y, z+1; (ii) x−1, y, z−1; (iii) x, y, z−1. |
Experimental details
Crystal data | |
Chemical formula | C7H6F2N2S |
Mr | 188.20 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 100 |
a, b, c (Å) | 6.4260 (7), 36.908 (4), 6.6821 (7) |
β (°) | 100.464 (2) |
V (Å3) | 1558.4 (3) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.39 |
Crystal size (mm) | 0.36 × 0.14 × 0.09 |
Data collection | |
Diffractometer | Bruker SMART APEXII DUO CCD area-detector |
Absorption correction | Multi-scan (SADABS; Bruker, 2009) |
Tmin, Tmax | 0.874, 0.967 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 13654, 3553, 3082 |
Rint | 0.031 |
(sin θ/λ)max (Å−1) | 0.650 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.033, 0.077, 1.06 |
No. of reflections | 3553 |
No. of parameters | 255 |
No. of restraints | 4 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.55, −0.36 |
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 |
N1A—H1NA···S1B | 0.794 (19) | 2.586 (19) | 3.3485 (15) | 161.7 (19) |
N2A—H2NA···S1B | 0.81 (2) | 2.77 (3) | 3.499 (2) | 151 (2) |
N2A—H3NA···S1Bi | 0.85 (2) | 2.65 (2) | 3.504 (2) | 175.2 (16) |
N1B—H1NB···S1Aii | 0.88 (2) | 2.49 (2) | 3.3273 (15) | 158.9 (17) |
N2B—H2NB···S1Aii | 0.88 (2) | 2.76 (2) | 3.5179 (19) | 146.4 (18) |
N2B—H3NB···S1Aiii | 0.82 (3) | 2.66 (3) | 3.4592 (19) | 167 (2) |
C4B—H4BA···F1Bi | 0.9500 | 2.5000 | 3.094 (2) | 121.00 |
C5B—H5BA···F1Bi | 0.9500 | 2.5200 | 3.111 (2) | 121.00 |
Symmetry codes: (i) x, y, z+1; (ii) x−1, y, z−1; (iii) x, y, z−1. |
Acknowledgements
The authors would like to thank Universiti Sains Malaysia for a Research University Grant (No. 1001/PFIZIK/811160). BN thanks the UGC for financial assistance through SAP and a BSR one-time grant for the purchase of chemicals.
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 work on the synthesis of thiourea derivatives (Fun et al., 2012a, 2012b; Sarojini et al., 2007), the title compound is prepared and its crystal structure is reported here.
The asymmetric unit (Fig. 1) of the title compound consists of two independent molecules (A and B), with comparable geometries. In molecule A, thiourea moiety (S1A/N1A/N2A/C7A) is essentially planar (r.m.s. deviation = 0.014 Å) and it forms a dihedral angle of 78.67 (9)° with the benzene ring (C1A-C6A). The corresponding r.m.s. deviation and dihedral angle for molecule B are 0.011 Å and 81.71 (8)°, respectively. Bond lengths (Allen et al., 1987) and angles are within normal ranges and are comparable to related structures (Fun et al., 2012a, 2012b). The fluorine atoms (F1A/F1B) of both molecules are disordered over two positions with refined site-occupancies of 0.572 (3):0.428 (3) and 0.909 (2): 0.091 (2), respectively.
In the crystal structure, Fig. 2, molecules are linked via intermolecular N—H···S and C—H···F hydrogen bonds (Table 1) into two-dimensional networks parallel to (010).