organic compounds
(Z)-N,N-Dimethyl-2-[phenyl(pyridin-2-yl)methylidene]hydrazinecarbothioamide
aDepartment of Applied Chemistry, Cochin University of Science and Technology, Kochi 682 022, India, and bDepartment of Chemistry, Faculty of Science, Eastern University, Sri Lanka, Chenkalady, Sri Lanka
*Correspondence e-mail: eesans@yahoo.com
The title compound, C15H16N4S, exists in the Z conformation with the thionyl S atom lying cis to the azomethine N atom. The shortening of the N—N distance [1.3697 (17) Å] is due to extensive delocalization with the pyridine ring. The hydrazine–carbothioamide unit is almost planar, with a maximum deviation of 0.013 (2) Å for the amide N atom. The stability of this conformation is favoured by the formation of an intramolecular N—H⋯N hydrogen bond. The packing of the molecules involves no classical intermolecular hydrogen-bonding interactions; however, a C—H⋯π interaction occurs.
Related literature
For abackground to hydrazinecarbothioamide and its derivatives, see: Beraldo & Gambino (2004). For the synthesis, see: Joseph et al. (2006). For related structures of hydrazinecarbothioamides, see: Philip et al. (2006); Arumugam et al. (2011). For related structures, see: Seena et al. (2008); Usman et al. (2002); Huheey et al. (1993); Joseph et al. (2004).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 2004); cell SAINT (Bruker, 2004); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008) and ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: SHELXL97 and publCIF (Westrip, 2010).
Supporting information
https://doi.org/10.1107/S1600536811045739/fj2463sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536811045739/fj2463Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536811045739/fj2463Isup3.cml
The title compound was prepared by adapting a reported procedure (Joseph et al., 2006) by refluxing a mixture of methanolic solutions of 2-benzoylpyridine (11 mmol, 2.032 g) and N,N-dimethylhydrazinecarbothioamide (11 mmol, 1.320 g) for five hours after adding 5 drops of acetic acid. Yellow crystals were collected, washed with few drops of methanol and dried over P4O10 in vacuo. Single crystals of the title compound suitable for X-ray analysis were obtained by slow evaporation from its methanolic solution.
All H atoms on C were placed in calculated positions, guided by difference maps, with C—H bond distances 0.93–0.96 Å. H atoms were assigned as Uiso=1.2Ueq (1.5 for Me). N3—H3' hydrogen was located from difference maps and restrained using DFIX instruction.
A large number of studies have been devoted to the search for derivatives of hydrazinecarbothioamide, which have been used as drugs and have the ability to form complexes. The biological activity of these compounds depends on the parent aldehyde or ketone (Beraldo & Gambino, 2004). Derivatives of hydrazinecarbothioamide constitute an important group of multidentate ligands with potential binding sites available for a wide variety of metal ions. These thiourea derivatives find substantial applications in different facets of contemporary scientific research.
The title compound (Z)-2-N,N-dimethyl-2-[phenyl(pyridin-2-yl)methylidene]hydrazinecarbothioamide is found to exist in Z configuration. A perspective view of the molecular structure of the title compound, along with the atom-labeling scheme, is given in Fig. 1. The S1= C13–N3–N2 torsion-angle [14.4 (2)°] indicates that thionyl atom S1 is positioned cis to azomethane nitrogen atom N2. The hydrazinecarbothioamide moiety adopts an extended conjugation, with electron delocalization throughout the N4/C13/S1/N3/N2 group. The fact that the compound exists in the thione form is confirmed by the N3—N2, N4—C13 and C13=S1 bond distances. The C13=S1 bond distance is close to that expected for a C=S double bond of 1.60 Å (Huheey et al., 1993). The N3—N2 bond distance is very close to the reported similar substituted hydrazinecarbothioamide (Joseph et al., 2004). The resonance form involving pyridine ring would account for the shortening of the N—N distance through extensive electron delocalization.
The hydrazinecarbothioamide moiety, comprising atoms N3, C13, S1 and N4, is almost planar with the maximum deviation of 0.013 (2) Å for atom N4. The pyridyl ring and phenyl ring are not in the same plane and the pyridyl ring is twisted significantly from the hydrazinecarbothioamide plane, with a torsionl angle of -176.3 (2)°.
Two types of intramolecular (classical and non-classical) hydrogen bond interactions are found in this molecule. A classical hydrogen bonding interaction between the hydrogen attached to the N3 nitrogen and the N1 nitrogen with the D···A distance of 2.602 (2) Å and the non-classical hydrogen bonding interaction between one of the hydrogen atom attached to the C14 atom and the S1 atom of the molecule with a D···A distance of 3.030 (2) Å as described in Table 1.
Fig. 2 shows the packing diagram of the title compound. Packing of these molecules does not include any classical intermolecular hydrogen bonding interactions in its molecular array. However, it may be directed by the C—H···π interaction between the pyridine ring and the hydrogen attached at C5 carbon atom of the phenyl ring of the another molecule. There are four very weak π–π interactions present in this molecular array with the distances of 5.5874 (17), 4.8708 (15), 5.5455 (17) and 4.9165 (15) Å between the centroids of the corresponding rings involving interactions.
For abackground to hydrazinecarbothioamide and its derivatives, see: Beraldo & Gambino (2004). For the synthesis, see: Joseph et al. (2006). For related structures of hydrazinecarbothioamides, see: Philip et al. (2006); Arumugam et al. (2011). For related structures, see: Seena et al. (2008); Usman et al. (2002); Huheey et al. (1993); Joseph et al. (2004).
Data collection: SMART (Bruker, 2004); cell
SAINT (Bruker, 2004); data reduction: SAINT (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008) and ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008) and publCIF (Westrip, 2010).C15H16N4S | F(000) = 600.0 |
Mr = 284.39 | Dx = 1.310 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 8120 reflections |
a = 10.011 (2) Å | θ = 2.0–26.0° |
b = 8.888 (2) Å | µ = 0.22 mm−1 |
c = 16.256 (4) Å | T = 153 K |
β = 94.528 (3)° | Block, yellow |
V = 1441.9 (6) Å3 | 0.32 × 0.28 × 0.22 mm |
Z = 4 |
Bruker P4 diffractometer | 2828 independent reflections |
Radiation source: fine-focus sealed tube | 2405 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.031 |
Detector resolution: 8.33 pixels mm-1 | θmax = 26.0°, θmin = 2.0° |
ω scans | h = −12→12 |
Absorption correction: multi-scan (SADABS; Bruker, 2004) | k = −10→10 |
Tmin = 0.932, Tmax = 0.953 | l = −20→20 |
14231 measured reflections |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.039 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.110 | w = 1/[σ2(Fo2) + (0.0606P)2 + 0.2366P] where P = (Fo2 + 2Fc2)/3 |
S = 1.06 | (Δ/σ)max = 0.014 |
2828 reflections | Δρmax = 0.19 e Å−3 |
188 parameters | Δρmin = −0.20 e Å−3 |
0 restraints | Extinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.0104 (16) |
C15H16N4S | V = 1441.9 (6) Å3 |
Mr = 284.39 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 10.011 (2) Å | µ = 0.22 mm−1 |
b = 8.888 (2) Å | T = 153 K |
c = 16.256 (4) Å | 0.32 × 0.28 × 0.22 mm |
β = 94.528 (3)° |
Bruker P4 diffractometer | 2828 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2004) | 2405 reflections with I > 2σ(I) |
Tmin = 0.932, Tmax = 0.953 | Rint = 0.031 |
14231 measured reflections |
R[F2 > 2σ(F2)] = 0.039 | 0 restraints |
wR(F2) = 0.110 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.06 | Δρmax = 0.19 e Å−3 |
2828 reflections | Δρmin = −0.20 e Å−3 |
188 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 | 0.75460 (4) | 0.15132 (5) | 0.31975 (3) | 0.05808 (18) | |
N1 | 0.98755 (14) | 0.68420 (14) | 0.33757 (8) | 0.0466 (3) | |
N2 | 0.99018 (12) | 0.35758 (13) | 0.36663 (7) | 0.0413 (3) | |
N3 | 0.87523 (12) | 0.42001 (16) | 0.33015 (8) | 0.0459 (3) | |
N4 | 0.68025 (13) | 0.41370 (17) | 0.25113 (9) | 0.0552 (4) | |
C1 | 1.33165 (15) | 0.42244 (19) | 0.39734 (10) | 0.0496 (4) | |
H1 | 1.3333 | 0.4983 | 0.3580 | 0.059* | |
C2 | 1.44999 (16) | 0.3531 (2) | 0.42682 (12) | 0.0584 (5) | |
H2 | 1.5307 | 0.3820 | 0.4069 | 0.070* | |
C3 | 1.44848 (18) | 0.2420 (2) | 0.48527 (12) | 0.0604 (5) | |
H3 | 1.5280 | 0.1956 | 0.5048 | 0.072* | |
C4 | 1.32983 (18) | 0.1993 (2) | 0.51494 (11) | 0.0586 (5) | |
H4 | 1.3291 | 0.1248 | 0.5551 | 0.070* | |
C5 | 1.21090 (16) | 0.26692 (18) | 0.48536 (10) | 0.0474 (4) | |
H5 | 1.1305 | 0.2368 | 0.5053 | 0.057* | |
C6 | 1.21111 (14) | 0.37895 (16) | 0.42634 (9) | 0.0386 (3) | |
C7 | 1.08395 (14) | 0.45037 (16) | 0.39224 (8) | 0.0383 (3) | |
C8 | 1.07742 (14) | 0.61797 (16) | 0.39196 (9) | 0.0404 (3) | |
C9 | 1.15590 (16) | 0.70179 (18) | 0.44910 (10) | 0.0499 (4) | |
H9 | 1.2173 | 0.6546 | 0.4865 | 0.060* | |
C10 | 1.14187 (19) | 0.85641 (19) | 0.44978 (13) | 0.0600 (5) | |
H10 | 1.1928 | 0.9143 | 0.4882 | 0.072* | |
C11 | 1.05114 (18) | 0.92430 (19) | 0.39262 (12) | 0.0574 (4) | |
H11 | 1.0408 | 1.0283 | 0.3912 | 0.069* | |
C12 | 0.97729 (18) | 0.83393 (18) | 0.33834 (11) | 0.0527 (4) | |
H12 | 0.9165 | 0.8793 | 0.2998 | 0.063* | |
C13 | 0.77074 (15) | 0.33429 (18) | 0.29902 (9) | 0.0442 (4) | |
C14 | 0.56134 (19) | 0.3425 (3) | 0.21167 (14) | 0.0755 (6) | |
H14A | 0.5778 | 0.3140 | 0.1564 | 0.113* | |
H14B | 0.4877 | 0.4119 | 0.2101 | 0.113* | |
H14C | 0.5400 | 0.2547 | 0.2424 | 0.113* | |
C15 | 0.6980 (2) | 0.5728 (2) | 0.23277 (14) | 0.0770 (6) | |
H15A | 0.6945 | 0.6306 | 0.2824 | 0.115* | |
H15B | 0.6279 | 0.6051 | 0.1930 | 0.115* | |
H15C | 0.7833 | 0.5874 | 0.2108 | 0.115* | |
H3' | 0.8833 (15) | 0.511 (2) | 0.3188 (9) | 0.043 (4)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0506 (3) | 0.0477 (3) | 0.0740 (3) | −0.00580 (18) | −0.0075 (2) | −0.00052 (19) |
N1 | 0.0516 (8) | 0.0409 (7) | 0.0469 (7) | 0.0035 (6) | 0.0016 (6) | 0.0030 (5) |
N2 | 0.0353 (6) | 0.0410 (7) | 0.0462 (7) | 0.0030 (5) | −0.0045 (5) | 0.0000 (5) |
N3 | 0.0394 (7) | 0.0388 (7) | 0.0574 (8) | 0.0035 (5) | −0.0087 (6) | 0.0003 (6) |
N4 | 0.0427 (7) | 0.0588 (9) | 0.0613 (8) | 0.0069 (6) | −0.0143 (6) | −0.0006 (7) |
C1 | 0.0441 (9) | 0.0505 (9) | 0.0542 (9) | 0.0001 (7) | 0.0042 (7) | 0.0044 (7) |
C2 | 0.0347 (8) | 0.0697 (12) | 0.0705 (11) | 0.0005 (8) | 0.0022 (8) | −0.0032 (9) |
C3 | 0.0425 (9) | 0.0639 (11) | 0.0711 (11) | 0.0098 (8) | −0.0182 (8) | −0.0052 (9) |
C4 | 0.0562 (10) | 0.0552 (10) | 0.0611 (10) | 0.0010 (8) | −0.0157 (8) | 0.0113 (8) |
C5 | 0.0418 (8) | 0.0478 (9) | 0.0513 (9) | −0.0055 (7) | −0.0045 (7) | 0.0039 (7) |
C6 | 0.0363 (7) | 0.0361 (7) | 0.0421 (8) | 0.0002 (6) | −0.0042 (6) | −0.0050 (6) |
C7 | 0.0372 (7) | 0.0394 (7) | 0.0380 (7) | 0.0016 (6) | 0.0014 (6) | −0.0007 (6) |
C8 | 0.0373 (7) | 0.0400 (8) | 0.0442 (8) | 0.0019 (6) | 0.0058 (6) | 0.0004 (6) |
C9 | 0.0448 (9) | 0.0463 (9) | 0.0577 (9) | −0.0007 (7) | −0.0016 (7) | −0.0048 (7) |
C10 | 0.0582 (11) | 0.0457 (10) | 0.0756 (12) | −0.0065 (8) | 0.0024 (9) | −0.0123 (8) |
C11 | 0.0634 (11) | 0.0360 (8) | 0.0745 (11) | −0.0007 (8) | 0.0162 (9) | −0.0006 (8) |
C12 | 0.0595 (10) | 0.0438 (9) | 0.0553 (9) | 0.0074 (7) | 0.0069 (8) | 0.0092 (7) |
C13 | 0.0373 (8) | 0.0499 (9) | 0.0444 (8) | 0.0043 (6) | −0.0021 (6) | −0.0052 (6) |
C14 | 0.0502 (11) | 0.0935 (16) | 0.0781 (13) | 0.0042 (10) | −0.0250 (10) | −0.0092 (11) |
C15 | 0.0699 (13) | 0.0660 (13) | 0.0902 (15) | 0.0183 (10) | −0.0245 (11) | 0.0121 (11) |
S1—C13 | 1.6712 (17) | C5—C6 | 1.383 (2) |
N1—C12 | 1.335 (2) | C5—H5 | 0.9300 |
N1—C8 | 1.3461 (19) | C6—C7 | 1.4898 (19) |
N2—C7 | 1.2934 (18) | C7—C8 | 1.491 (2) |
N2—N3 | 1.3697 (17) | C8—C9 | 1.386 (2) |
N3—C13 | 1.3591 (19) | C9—C10 | 1.381 (2) |
N3—H3' | 0.837 (17) | C9—H9 | 0.9300 |
N4—C13 | 1.3466 (19) | C10—C11 | 1.385 (3) |
N4—C14 | 1.452 (2) | C10—H10 | 0.9300 |
N4—C15 | 1.459 (3) | C11—C12 | 1.366 (2) |
C1—C6 | 1.385 (2) | C11—H11 | 0.9300 |
C1—C2 | 1.387 (2) | C12—H12 | 0.9300 |
C1—H1 | 0.9300 | C14—H14A | 0.9600 |
C2—C3 | 1.371 (3) | C14—H14B | 0.9600 |
C2—H2 | 0.9300 | C14—H14C | 0.9600 |
C3—C4 | 1.370 (3) | C15—H15A | 0.9600 |
C3—H3 | 0.9300 | C15—H15B | 0.9600 |
C4—C5 | 1.385 (2) | C15—H15C | 0.9600 |
C4—H4 | 0.9300 | ||
C12—N1—C8 | 118.54 (14) | N1—C8—C7 | 117.75 (13) |
C7—N2—N3 | 116.40 (12) | C9—C8—C7 | 120.85 (13) |
C13—N3—N2 | 121.99 (13) | C10—C9—C8 | 119.18 (16) |
C13—N3—H3' | 123.1 (11) | C10—C9—H9 | 120.4 |
N2—N3—H3' | 113.3 (11) | C8—C9—H9 | 120.4 |
C13—N4—C14 | 121.18 (15) | C9—C10—C11 | 119.31 (16) |
C13—N4—C15 | 122.61 (14) | C9—C10—H10 | 120.3 |
C14—N4—C15 | 116.16 (14) | C11—C10—H10 | 120.3 |
C6—C1—C2 | 120.13 (16) | C12—C11—C10 | 118.02 (15) |
C6—C1—H1 | 119.9 | C12—C11—H11 | 121.0 |
C2—C1—H1 | 119.9 | C10—C11—H11 | 121.0 |
C3—C2—C1 | 120.23 (16) | N1—C12—C11 | 123.63 (16) |
C3—C2—H2 | 119.9 | N1—C12—H12 | 118.2 |
C1—C2—H2 | 119.9 | C11—C12—H12 | 118.2 |
C4—C3—C2 | 120.04 (16) | N4—C13—N3 | 112.61 (14) |
C4—C3—H3 | 120.0 | N4—C13—S1 | 123.72 (12) |
C2—C3—H3 | 120.0 | N3—C13—S1 | 123.65 (11) |
C3—C4—C5 | 120.19 (16) | N4—C14—H14A | 109.5 |
C3—C4—H4 | 119.9 | N4—C14—H14B | 109.5 |
C5—C4—H4 | 119.9 | H14A—C14—H14B | 109.5 |
C6—C5—C4 | 120.31 (15) | N4—C14—H14C | 109.5 |
C6—C5—H5 | 119.8 | H14A—C14—H14C | 109.5 |
C4—C5—H5 | 119.8 | H14B—C14—H14C | 109.5 |
C5—C6—C1 | 119.09 (14) | N4—C15—H15A | 109.5 |
C5—C6—C7 | 121.12 (13) | N4—C15—H15B | 109.5 |
C1—C6—C7 | 119.77 (13) | H15A—C15—H15B | 109.5 |
N2—C7—C6 | 115.17 (12) | N4—C15—H15C | 109.5 |
N2—C7—C8 | 127.26 (13) | H15A—C15—H15C | 109.5 |
C6—C7—C8 | 117.56 (12) | H15B—C15—H15C | 109.5 |
N1—C8—C9 | 121.30 (14) | ||
C7—N2—N3—C13 | 178.44 (14) | N2—C7—C8—N1 | −23.7 (2) |
C6—C1—C2—C3 | −0.5 (3) | C6—C7—C8—N1 | 157.05 (13) |
C1—C2—C3—C4 | −0.2 (3) | N2—C7—C8—C9 | 152.63 (15) |
C2—C3—C4—C5 | 0.8 (3) | C6—C7—C8—C9 | −26.6 (2) |
C3—C4—C5—C6 | −0.7 (3) | N1—C8—C9—C10 | −0.4 (2) |
C4—C5—C6—C1 | 0.0 (2) | C7—C8—C9—C10 | −176.54 (16) |
C4—C5—C6—C7 | 178.48 (14) | C8—C9—C10—C11 | −0.9 (3) |
C2—C1—C6—C5 | 0.6 (2) | C9—C10—C11—C12 | 1.0 (3) |
C2—C1—C6—C7 | −177.91 (14) | C8—N1—C12—C11 | −1.5 (3) |
N3—N2—C7—C6 | −175.96 (12) | C10—C11—C12—N1 | 0.2 (3) |
N3—N2—C7—C8 | 4.8 (2) | C14—N4—C13—N3 | 179.72 (16) |
C5—C6—C7—N2 | −50.15 (19) | C15—N4—C13—N3 | 2.5 (2) |
C1—C6—C7—N2 | 128.32 (15) | C14—N4—C13—S1 | −1.7 (2) |
C5—C6—C7—C8 | 129.21 (15) | C15—N4—C13—S1 | −178.84 (15) |
C1—C6—C7—C8 | −52.32 (19) | N2—N3—C13—N4 | −166.98 (14) |
C12—N1—C8—C9 | 1.5 (2) | N2—N3—C13—S1 | 14.4 (2) |
C12—N1—C8—C7 | 177.81 (14) |
Cg is the centroid of the N1/C8–C12 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3′···N1 | 0.837 (17) | 1.869 (17) | 2.602 (2) | 145.4 (15) |
C14—H14C···S1 | 0.96 | 2.57 | 3.030 (2) | 109 |
C5—H5···Cgi | 0.93 | 2.66 | 3.536 (2) | 157 |
Symmetry code: (i) −x+2, −y+1, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C15H16N4S |
Mr | 284.39 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 153 |
a, b, c (Å) | 10.011 (2), 8.888 (2), 16.256 (4) |
β (°) | 94.528 (3) |
V (Å3) | 1441.9 (6) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.22 |
Crystal size (mm) | 0.32 × 0.28 × 0.22 |
Data collection | |
Diffractometer | Bruker P4 |
Absorption correction | Multi-scan (SADABS; Bruker, 2004) |
Tmin, Tmax | 0.932, 0.953 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 14231, 2828, 2405 |
Rint | 0.031 |
(sin θ/λ)max (Å−1) | 0.617 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.039, 0.110, 1.06 |
No. of reflections | 2828 |
No. of parameters | 188 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.19, −0.20 |
Computer programs: SMART (Bruker, 2004), SAINT (Bruker, 2004), SHELXS97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008) and ORTEP-3 (Farrugia, 1997), SHELXL97 (Sheldrick, 2008) and publCIF (Westrip, 2010).
Cg is the centroid of the N1/C8–C12 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3'···N1 | 0.837 (17) | 1.869 (17) | 2.602 (2) | 145.4 (15) |
C14—H14C···S1 | 0.96 | 2.57 | 3.030 (2) | 109.4 |
C5—H5···Cgi | 0.93 | 2.66 | 3.536 (2) | 157 |
Symmetry code: (i) −x+2, −y+1, −z+1. |
Acknowledgements
KJ thanks the UGC, New Delhi, for the award of a Teacher Fellowship. The authors also thank the STIC, CUSAT, Kochi-22, for providing the single-crystal XRD data.
References
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A large number of studies have been devoted to the search for derivatives of hydrazinecarbothioamide, which have been used as drugs and have the ability to form complexes. The biological activity of these compounds depends on the parent aldehyde or ketone (Beraldo & Gambino, 2004). Derivatives of hydrazinecarbothioamide constitute an important group of multidentate ligands with potential binding sites available for a wide variety of metal ions. These thiourea derivatives find substantial applications in different facets of contemporary scientific research.
The title compound (Z)-2-N,N-dimethyl-2-[phenyl(pyridin-2-yl)methylidene]hydrazinecarbothioamide is found to exist in Z configuration. A perspective view of the molecular structure of the title compound, along with the atom-labeling scheme, is given in Fig. 1. The S1= C13–N3–N2 torsion-angle [14.4 (2)°] indicates that thionyl atom S1 is positioned cis to azomethane nitrogen atom N2. The hydrazinecarbothioamide moiety adopts an extended conjugation, with electron delocalization throughout the N4/C13/S1/N3/N2 group. The fact that the compound exists in the thione form is confirmed by the N3—N2, N4—C13 and C13=S1 bond distances. The C13=S1 bond distance is close to that expected for a C=S double bond of 1.60 Å (Huheey et al., 1993). The N3—N2 bond distance is very close to the reported similar substituted hydrazinecarbothioamide (Joseph et al., 2004). The resonance form involving pyridine ring would account for the shortening of the N—N distance through extensive electron delocalization.
The hydrazinecarbothioamide moiety, comprising atoms N3, C13, S1 and N4, is almost planar with the maximum deviation of 0.013 (2) Å for atom N4. The pyridyl ring and phenyl ring are not in the same plane and the pyridyl ring is twisted significantly from the hydrazinecarbothioamide plane, with a torsionl angle of -176.3 (2)°.
Two types of intramolecular (classical and non-classical) hydrogen bond interactions are found in this molecule. A classical hydrogen bonding interaction between the hydrogen attached to the N3 nitrogen and the N1 nitrogen with the D···A distance of 2.602 (2) Å and the non-classical hydrogen bonding interaction between one of the hydrogen atom attached to the C14 atom and the S1 atom of the molecule with a D···A distance of 3.030 (2) Å as described in Table 1.
Fig. 2 shows the packing diagram of the title compound. Packing of these molecules does not include any classical intermolecular hydrogen bonding interactions in its molecular array. However, it may be directed by the C—H···π interaction between the pyridine ring and the hydrogen attached at C5 carbon atom of the phenyl ring of the another molecule. There are four very weak π–π interactions present in this molecular array with the distances of 5.5874 (17), 4.8708 (15), 5.5455 (17) and 4.9165 (15) Å between the centroids of the corresponding rings involving interactions.