supplementary materials


cv5395 scheme

Acta Cryst. (2013). E69, o643    [ doi:10.1107/S1600536813008337 ]

rac-5-(1-Methylethyl)-2-sulfanylideneimidazolidin-4-one

R. de P. Castro, F. C. Macedo Jr, T. O. Brito, A. de Fátima and J. R. Sabino

Abstract top

In the title compound, C6H10N2OS, the 2-sulfanylideneimidazolidin-4-one fragment is essentially planar (r.m.s. deviation = 0.0033 Å). In the crystal, one amino group is involved in N-H...O hydrogen bonding, which links pairs of molecules into inversion dimers, while the other amino group generates weak N-H...S hydrogen bonds, which link these dimers into chains in [10-1]. The chains are further aggregated into layers parallel to the ac plane through weak C-H...O interactions.

Comment top

2-Thiohydantoin derivatives demonstrate biological activities when used as drugs, fungicides and herbicides (Ghoneim et al., 1987; Marton et al., 1993). Herewith we present the title compound, (I), which is a new 2-thiohydantoin derivative.

In (I) (Fig. 1), the thiohydantoin ring is essentially planar [r.m.s = 0.0033 Å and largest deviation of 0.008 (2) Å for O1]. The orientation of the isopropyl group, defined by the atoms C4, C5 and C6, relative to this plane is given by the torsion angles N1—C3—C4—C5 and N1—C3—C4—C6 of 169.42 (9) and 65.8 (1)°, respectively. The C1—S1 bond, 1.6621 (9), has double-bond character. The N2—C1 bond distance is longer than N1—C1 bond distance by 0.047 Å. The N1—C1—S1 bond angle is greater than N2—C1—S1 bond angle by 3.84°. These differences are also observed in two similar compounds: 5-phenyl-2-sulfanylidene-4-imidazolidinone [CSD refcode: YINGIM (Ogawa et al., 2007)] and rac-5-benzyl-2-thiohydantoin [CSD refcode: KUGDUM (Kunimoto et al., 2009)]. Besides, the molecular geometry of the title compound is comparable to these reference molecules within the standard uncertainties.

Intermolecular N—H···O hydrogen bonds (Table 1) lead to centrosymmetric dimers formation. Weak interactions of type N—H···S (Table 1) mediate the formation of the chains along [101], which are further linked into layers parallel to ac plane through the weak C—H···O interactions (Table 1).

Related literature top

For the biological activity of 2-thiohydantoin derivatives, see: Ghoneim et al. (1987); Marton et al. (1993). For the crystal structures of related compounds, see: Kunimoto et al. (2009); Ogawa et al. (2007). For details of the synthesis, see: Wang et al. (2006).

Experimental top

The procedure employed for synthesis of compound (I) was described by Wang et al. (2006). A mixture of D-valine (2.34 g, 0.2 mol) and thiourea (4.57 g, 0.6 mol) was added in a flask and heated under stirring. The reaction was remained in the oil bath at temperature of 190°C for 30 minutes, after this period, the flask was allowed to cool down and water (20 ml) was added while the flask was still warm. The solution was reheated to dissolve all the solids and allowed to cool to room temperature, then placed in a refrigerator for 3 h. The solid were removed by vacuum filtration and storage. Recrystallization from chloroform yielded single crystals suitable for X-ray analysis.

Refinement top

All H atoms were placed in calculated positions (N—H = 0.86 Å; C—H = 0.96–0.98 Å) and treated as riding atoms, with Uiso(H) = 1.2–1.5 Ueq of the parent atom.

Computing details top

Data collection: APEX2 (Bruker, 2010); cell refinement: SAINT (Bruker, 2010); data reduction: SAINT (Bruker, 2010); 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, 2012); software used to prepare material for publication: WinGX (Farrugia, 2012).

Figures top
[Figure 1] Fig. 1. The structure structure of (I) showing the atom-numbering scheme. Displacement ellipsoids are drawn at the 50% probability level
[Figure 2] Fig. 2. A portion of the crystal packing, showing intermolecular hydrogen bonds as dashed lines [symmetry codes: (i) -x, -y + 1, -z + 1; (ii) -x + 1, -y + 1, -z].
rac-5-(1-Methylethyl)-2-sulfanylideneimidazolidin-4-one top
Crystal data top
C6H10N2OSF(000) = 336
Mr = 158.23Dx = 1.316 Mg m3
Monoclinic, P21/cMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ybcCell parameters from 637 reflections
a = 5.7161 (1) Åθ = 7.0–60.8°
b = 17.4091 (4) ŵ = 0.34 mm1
c = 8.2505 (2) ÅT = 308 K
β = 103.513 (1)°Prism, colourless
V = 798.30 (3) Å30.93 × 0.4 × 0.3 mm
Z = 4
Data collection top
Bruker APEXII CCD
diffractometer
2544 reflections with I > 2σ(I)
Multilayer optics monochromatorRint = 0.020
φ and ω scansθmax = 34.3°, θmin = 2.3°
Absorption correction: multi-scan
(SADABS; Bruker, 2010)
h = 98
Tmin = 0.936, Tmax = 0.979k = 2627
18741 measured reflectionsl = 1213
3064 independent reflections
Refinement top
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.037Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.114H-atom parameters constrained
S = 1.02 w = 1/[σ2(Fo2) + (0.0671P)2 + 0.0869P]
where P = (Fo2 + 2Fc2)/3
3064 reflections(Δ/σ)max = 0.002
93 parametersΔρmax = 0.33 e Å3
0 restraintsΔρmin = 0.20 e Å3
Crystal data top
C6H10N2OSV = 798.30 (3) Å3
Mr = 158.23Z = 4
Monoclinic, P21/cMo Kα radiation
a = 5.7161 (1) ŵ = 0.34 mm1
b = 17.4091 (4) ÅT = 308 K
c = 8.2505 (2) Å0.93 × 0.4 × 0.3 mm
β = 103.513 (1)°
Data collection top
Bruker APEXII CCD
diffractometer
3064 independent reflections
Absorption correction: multi-scan
(SADABS; Bruker, 2010)
2544 reflections with I > 2σ(I)
Tmin = 0.936, Tmax = 0.979Rint = 0.020
18741 measured reflectionsθmax = 34.3°
Refinement top
R[F2 > 2σ(F2)] = 0.037H-atom parameters constrained
wR(F2) = 0.114Δρmax = 0.33 e Å3
S = 1.02Δρmin = 0.20 e Å3
3064 reflectionsAbsolute structure: ?
93 parametersFlack parameter: ?
0 restraintsRogers parameter: ?
Special details top

Geometry. All s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in distances, angles and torsion angles; correlations between s.u.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell s.u.'s is used for estimating s.u.'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 > 2σ(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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
S10.50440 (6)0.579973 (16)0.22144 (4)0.04944 (11)
C10.31293 (17)0.50804 (5)0.22060 (11)0.03529 (18)
N10.25674 (18)0.45108 (5)0.11098 (10)0.0431 (2)
H10.31880.4460.02620.052*
C30.07920 (18)0.39803 (6)0.14899 (11)0.03667 (18)
H30.06820.40050.06020.044*
C40.16814 (19)0.31474 (5)0.16973 (13)0.0415 (2)
H40.22760.30150.07110.05*
C50.0352 (2)0.25955 (7)0.17693 (18)0.0568 (3)
H5A0.09050.26890.27640.085*
H5B0.02190.20770.17780.085*
H5C0.16550.26720.08110.085*
C60.3773 (2)0.30522 (7)0.3219 (2)0.0595 (3)
H6C0.50110.34170.31630.089*
H6B0.44080.25410.32360.089*
H6A0.32150.31390.42140.089*
C20.03374 (17)0.43453 (5)0.30588 (12)0.03636 (18)
O10.10205 (16)0.41213 (5)0.38922 (12)0.0516 (2)
N20.17754 (15)0.49851 (5)0.33699 (11)0.03987 (18)
H20.18250.52910.41960.048*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
S10.0669 (2)0.04239 (16)0.04620 (17)0.02026 (11)0.02773 (13)0.00744 (10)
C10.0445 (4)0.0311 (4)0.0333 (4)0.0024 (3)0.0153 (3)0.0008 (3)
N10.0626 (5)0.0386 (4)0.0348 (4)0.0127 (4)0.0248 (4)0.0050 (3)
C30.0431 (4)0.0368 (4)0.0320 (4)0.0061 (3)0.0126 (3)0.0032 (3)
C40.0497 (5)0.0335 (4)0.0486 (5)0.0080 (4)0.0263 (4)0.0118 (4)
C50.0625 (7)0.0448 (6)0.0676 (7)0.0212 (5)0.0242 (6)0.0143 (5)
C60.0440 (5)0.0419 (5)0.0917 (10)0.0023 (4)0.0142 (6)0.0060 (6)
C20.0379 (4)0.0328 (4)0.0431 (4)0.0009 (3)0.0190 (3)0.0048 (3)
O10.0562 (5)0.0449 (4)0.0667 (5)0.0122 (3)0.0406 (4)0.0155 (4)
N20.0486 (4)0.0345 (4)0.0431 (4)0.0074 (3)0.0239 (3)0.0096 (3)
Geometric parameters (Å, º) top
S1—C11.6621 (9)C4—H40.98
C1—N11.3300 (12)C5—H5A0.96
C1—N21.3769 (12)C5—H5B0.96
N1—C31.4595 (12)C5—H5C0.96
N1—H10.86C6—H6C0.96
C3—C21.5179 (13)C6—H6B0.96
C3—C41.5328 (14)C6—H6A0.96
C3—H30.98C2—O11.2152 (12)
C4—C51.5200 (14)C2—N21.3724 (12)
C4—C61.5269 (18)N2—H20.86
N1—C1—N2107.37 (8)C4—C5—H5A109.5
N1—C1—S1128.23 (7)C4—C5—H5B109.5
N2—C1—S1124.39 (7)H5A—C5—H5B109.5
C1—N1—C3113.28 (8)C4—C5—H5C109.5
C1—N1—H1123.4H5A—C5—H5C109.5
C3—N1—H1123.4H5B—C5—H5C109.5
N1—C3—C2100.63 (7)C4—C6—H6C109.5
N1—C3—C4113.17 (8)C4—C6—H6B109.5
C2—C3—C4114.79 (8)H6C—C6—H6B109.5
N1—C3—H3109.3C4—C6—H6A109.5
C2—C3—H3109.3H6C—C6—H6A109.5
C4—C3—H3109.3H6B—C6—H6A109.5
C5—C4—C6111.00 (10)O1—C2—N2126.04 (9)
C5—C4—C3111.44 (9)O1—C2—C3127.40 (9)
C6—C4—C3111.72 (8)N2—C2—C3106.55 (8)
C5—C4—H4107.5C2—N2—C1112.15 (8)
C6—C4—H4107.5C2—N2—H2123.9
C3—C4—H4107.5C1—N2—H2123.9
N2—C1—N1—C30.87 (12)N1—C3—C2—O1179.83 (11)
S1—C1—N1—C3179.62 (7)C4—C3—C2—O157.99 (15)
C1—N1—C3—C20.55 (11)N1—C3—C2—N20.03 (10)
C1—N1—C3—C4122.43 (10)C4—C3—C2—N2121.82 (9)
N1—C3—C4—C5169.42 (9)O1—C2—N2—C1179.33 (11)
C2—C3—C4—C575.83 (11)C3—C2—N2—C10.49 (11)
N1—C3—C4—C665.78 (11)N1—C1—N2—C20.84 (12)
C2—C3—C4—C648.97 (12)S1—C1—N2—C2179.65 (7)
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
N2—H2···O1i0.862.022.8573 (11)164
N1—H1···S1ii0.862.523.3806 (9)176
C6—H6C···O1iii0.962.523.4434 (14)160
Symmetry codes: (i) x, y+1, z+1; (ii) x+1, y+1, z; (iii) x+1, y, z.
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
N2—H2···O1i0.862.022.8573 (11)163.8
N1—H1···S1ii0.862.523.3806 (9)175.5
C6—H6C···O1iii0.962.523.4434 (14)160.3
Symmetry codes: (i) x, y+1, z+1; (ii) x+1, y+1, z; (iii) x+1, y, z.
Acknowledgements top

This work includes part of the activities developed by the Network of Studies and the Development of Novel Inhibitors of Urease, financed by CNPq (562479/2010–4) and FAPEMIG (APQ-04781–10). The authors are also grateful to CNPq (TOB) and CAPES (RPC) for providing their respective fellowships.

references
References top

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