Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536807045102/dn2229sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S1600536807045102/dn2229Isup2.hkl |
CCDC reference: 663785
Crystals of I were obtained directly from the botle of the commercial product (Aldrich).
C-bound H atoms were placed in geometrically idealized positions and refined using the riding model, with C–H = 0.96 Å. H atoms on N atoms were located in a difference map and their positional parameters were refined. The Uiso(H) values were set at 1.5 Eeq for methyl H atoms and 1.2 Ueq(N) for N–H atoms.
As part of a study on the supramolecular structure of thiosemicarbazones and its metal complexes we found necessary for comparisons to know the crystal structure of the 2-methyl-3-thiosemicarbazide, (I).
The molecule (I) presents an anti arrangement between the S atom and the hydrazinic N atom with respect to the N2–C1 bond, as shown in Fig. 1. The molecule is nearly planar with the C2 [0.057 (2) Å] and N3 [0.053 (2) Å] showing the greater deviation from the mean plane of the molecule. The anti conformation is reinforced by an intramolecular N3–H3A ··· N1.
The two H atoms on N3 form N–H···S hydrogen bonds generating tapes (Fig. 2). These tapes are interconected into a 3-dimmensional H-bonded structure through N1–HA···S and N1–HB···S H-bonds (Fig. 3).
For general background, see: Allen et al. (1997); Casas et al. (2000).
For related structures, see: Rapheal et al. (2005); West et al., (2001); Castineiras et al. (2000); Lynch & McClenaghan (2000); Valente et al. (1998); Chattopadhyay et al. (1987, 1991); Andreetti et al. (1970).
Data collection: SMART (Bruker, 1999); cell refinement: SAINT (Bruker, 1999); data reduction: SAINT (Bruker, 1999); program(s) used to solve structure: SHELXTL (Sheldrick, 2000); program(s) used to refine structure: SHELXTL (Sheldrick, 2000); molecular graphics: X-SEED (Barbour, 2001); software used to prepare material for publication: publCIF (Westrip, 2007).
C2H7N3S | F(000) = 224 |
Mr = 105.17 | Dx = 1.404 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 2596 reflections |
a = 8.606 (2) Å | θ = 2.9–25.4° |
b = 5.940 (1) Å | µ = 0.50 mm−1 |
c = 9.843 (2) Å | T = 298 K |
β = 98.641 (3)° | Prism, clear colourless |
V = 497.46 (17) Å3 | 0.45 × 0.33 × 0.19 mm |
Z = 4 |
Bruker SMART APEX CCD diffractometer | 912 independent reflections |
Radiation source: fine-focus sealed tube | 805 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.080 |
Detector resolution: 0.661 pixels mm-1 | θmax = 25.4°, θmin = 2.9° |
ω–scans | h = −10→10 |
Absorption correction: analytical (XPREP in SHELXTL; Sheldrick, 2000) | k = −7→7 |
Tmin = 0.814, Tmax = 0.915 | l = −11→11 |
3668 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) = 0.088 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.07 | w = 1/[σ2(Fo2) + (0.0392P)2 + 0.0728P] where P = (Fo2 + 2Fc2)/3 |
912 reflections | (Δ/σ)max < 0.001 |
68 parameters | Δρmax = 0.25 e Å−3 |
6 restraints | Δρmin = −0.20 e Å−3 |
C2H7N3S | V = 497.46 (17) Å3 |
Mr = 105.17 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 8.606 (2) Å | µ = 0.50 mm−1 |
b = 5.940 (1) Å | T = 298 K |
c = 9.843 (2) Å | 0.45 × 0.33 × 0.19 mm |
β = 98.641 (3)° |
Bruker SMART APEX CCD diffractometer | 912 independent reflections |
Absorption correction: analytical (XPREP in SHELXTL; Sheldrick, 2000) | 805 reflections with I > 2σ(I) |
Tmin = 0.814, Tmax = 0.915 | Rint = 0.080 |
3668 measured reflections |
R[F2 > 2σ(F2)] = 0.037 | 6 restraints |
wR(F2) = 0.088 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.07 | Δρmax = 0.25 e Å−3 |
912 reflections | Δρmin = −0.20 e Å−3 |
68 parameters |
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 | 0.94085 (5) | 0.40767 (8) | 0.26511 (6) | 0.0435 (2) | |
N1 | 1.2493 (2) | 0.8483 (3) | 0.4444 (2) | 0.0470 (5) | |
H1A | 1.279 (3) | 0.839 (4) | 0.5340 (19) | 0.070* | |
H1B | 1.335 (3) | 0.868 (4) | 0.409 (3) | 0.070* | |
N2 | 1.18369 (17) | 0.6403 (2) | 0.39541 (17) | 0.0360 (4) | |
N3 | 0.9600 (2) | 0.8401 (3) | 0.3293 (2) | 0.0454 (5) | |
H3A | 1.014 (3) | 0.958 (4) | 0.363 (3) | 0.068* | |
H3B | 0.863 (2) | 0.845 (4) | 0.291 (3) | 0.068* | |
C1 | 1.0337 (2) | 0.6427 (3) | 0.33555 (19) | 0.0332 (4) | |
C2 | 1.2784 (2) | 0.4402 (3) | 0.4250 (2) | 0.0452 (5) | |
H2A | 1.2199 | 0.3108 | 0.3880 | 0.068* | |
H2B | 1.3059 | 0.4235 | 0.5227 | 0.068* | |
H2C | 1.3724 | 0.4533 | 0.3840 | 0.068* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0331 (3) | 0.0333 (3) | 0.0622 (4) | −0.00350 (19) | 0.0011 (2) | −0.0053 (2) |
N1 | 0.0418 (10) | 0.0371 (10) | 0.0599 (12) | −0.0072 (7) | 0.0007 (9) | −0.0092 (8) |
N2 | 0.0307 (8) | 0.0276 (8) | 0.0486 (10) | −0.0008 (6) | 0.0029 (7) | −0.0021 (7) |
N3 | 0.0337 (9) | 0.0314 (9) | 0.0694 (13) | 0.0038 (7) | 0.0021 (8) | −0.0028 (8) |
C1 | 0.0306 (10) | 0.0299 (10) | 0.0405 (10) | 0.0002 (7) | 0.0102 (8) | 0.0023 (7) |
C2 | 0.0354 (10) | 0.0385 (12) | 0.0596 (14) | 0.0067 (8) | −0.0003 (9) | 0.0009 (9) |
S1—C1 | 1.704 (3) | N3—C1 | 1.330 (2) |
N1—N2 | 1.413 (2) | N3—H3A | 0.87 (2) |
N1—H1A | 0.88 (2) | N3—H3B | 0.86 (2) |
N1—H1B | 0.87 (2) | C2—H2A | 0.9600 |
N2—C1 | 1.336 (2) | C2—H2B | 0.9600 |
N2—C2 | 1.446 (2) | C2—H2C | 0.9600 |
N2—N1—H1A | 109 (2) | N3—C1—N2 | 116.9 (2) |
N2—N1—H1B | 107 (2) | N3—C1—S1 | 120.8 (2) |
H1A—N1—H1B | 106 (3) | N2—C1—S1 | 122.2 (1) |
C1—N2—N1 | 116.8 (1) | N2—C2—H2A | 109.5 |
C1—N2—C2 | 125.2 (2) | N2—C2—H2B | 109.5 |
N1—N2—C2 | 117.8 (2) | H2A—C2—H2B | 109.5 |
C1—N3—H3A | 117 (2) | N2—C2—H2C | 109.5 |
C1—N3—H3B | 118 (2) | H2A—C2—H2C | 109.5 |
H3A—N3—H3B | 124 (2) | H2B—C2—H2C | 109.5 |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···S1i | 0.88 (2) | 2.90 (2) | 3.636 (2) | 142 (2) |
N1—H1B···S1ii | 0.87 (2) | 2.78 (2) | 3.625 (2) | 166 (3) |
N3—H3A···N1 | 0.87 (2) | 2.17 (3) | 2.576 (3) | 108 (2) |
N3—H3A···S1iii | 0.87 (2) | 2.88 (2) | 3.430 (2) | 123 (2) |
N3—H3B···S1iv | 0.86 (2) | 2.62 (2) | 3.460 (2) | 165 (2) |
Symmetry codes: (i) x+1/2, −y+3/2, z+1/2; (ii) −x+5/2, y+1/2, −z+1/2; (iii) x, y+1, z; (iv) −x+3/2, y+1/2, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C2H7N3S |
Mr | 105.17 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 298 |
a, b, c (Å) | 8.606 (2), 5.940 (1), 9.843 (2) |
β (°) | 98.641 (3) |
V (Å3) | 497.46 (17) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.50 |
Crystal size (mm) | 0.45 × 0.33 × 0.19 |
Data collection | |
Diffractometer | Bruker SMART APEX CCD diffractometer |
Absorption correction | Analytical (XPREP in SHELXTL; Sheldrick, 2000) |
Tmin, Tmax | 0.814, 0.915 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 3668, 912, 805 |
Rint | 0.080 |
(sin θ/λ)max (Å−1) | 0.604 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.037, 0.088, 1.07 |
No. of reflections | 912 |
No. of parameters | 68 |
No. of restraints | 6 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.25, −0.20 |
Computer programs: SMART (Bruker, 1999), SAINT (Bruker, 1999), SHELXTL (Sheldrick, 2000), X-SEED (Barbour, 2001), publCIF (Westrip, 2007).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···S1i | 0.88 (2) | 2.90 (2) | 3.636 (2) | 142 (2) |
N1—H1B···S1ii | 0.87 (2) | 2.78 (2) | 3.625 (2) | 166 (3) |
N3—H3A···N1 | 0.87 (2) | 2.17 (3) | 2.576 (3) | 108 (2) |
N3—H3A···S1iii | 0.87 (2) | 2.88 (2) | 3.430 (2) | 123 (2) |
N3—H3B···S1iv | 0.86 (2) | 2.62 (2) | 3.460 (2) | 165 (2) |
Symmetry codes: (i) x+1/2, −y+3/2, z+1/2; (ii) −x+5/2, y+1/2, −z+1/2; (iii) x, y+1, z; (iv) −x+3/2, y+1/2, −z+1/2. |
As part of a study on the supramolecular structure of thiosemicarbazones and its metal complexes we found necessary for comparisons to know the crystal structure of the 2-methyl-3-thiosemicarbazide, (I).
The molecule (I) presents an anti arrangement between the S atom and the hydrazinic N atom with respect to the N2–C1 bond, as shown in Fig. 1. The molecule is nearly planar with the C2 [0.057 (2) Å] and N3 [0.053 (2) Å] showing the greater deviation from the mean plane of the molecule. The anti conformation is reinforced by an intramolecular N3–H3A ··· N1.
The two H atoms on N3 form N–H···S hydrogen bonds generating tapes (Fig. 2). These tapes are interconected into a 3-dimmensional H-bonded structure through N1–HA···S and N1–HB···S H-bonds (Fig. 3).