organic compounds
4-[2-(2-Benzylidenehydrazinylidene)-3,6-dihydro-2H-1,3,4-thiadiazin-5-yl]-3-(4-methoxyphenyl)sydnone
aX-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia, and bDepartment of Studies in Chemistry, Mangalore University, Mangalagangotri, Mangalore 574 199, India
*Correspondence e-mail: hkfun@usm.my
In the title compound, C19H16N6O3S, the 3,6-dihydro-1,3,4-thiadiazine ring adopts a twist-boat conformation. The dihedral angle between the methoxy-substituted benzene ring and the oxadiazole ring is 71.91 (7)°. In the centrosymmetrically related molecules are linked into dimers via pairs of intermolecular N—H⋯N hydrogen bonds, generating R22(8) ring motifs. There is an intramolecular C—H⋯O hydrogen bond which generates an S(6) ring motif.
Related literature
For applications of et al. (1949); Hedge et al. (2008); Rai et al. (2008); Kalluraya et al. (2003). For the definition of ring-puckering parameters, see: Cremer & Pople (1975). For the definition of graph-set notation, see: Bernstein et al. (1995).
see: BakerExperimental
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
10.1107/S1600536811009329/rz2567sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536811009329/rz2567Isup2.hkl
To a mixture of 4-bromoacetyl-3-(p-anisyl)sydnone (0.01 mol) and N'-(phenylmethylidene) carbonohydrazide (0.01 mol) in ethanol, a catalytic amount of anhydrous sodium acetate was added. The solution was stirred at room temperature for 2–3 hours. The solid product that separated out was filtered and dried. It was then recrystallized from ethanol. Crystals suitable for X-ray analysis were obtained by slow evaporation of a DMF/ethanol solution (1:2 v/v).
Atom H1N3 was located from a difference Fourier map and refined freely [N—H = 0.87 (2) Å]. The remaining H atoms were positioned geometrically [C—H = 0.93–0.97 Å] and were refined using a riding model, with Uiso(H) = 1.2 Ueq(C) or 1.5 Ueq(C) for methyl H atoms.
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).C19H16N6O3S | F(000) = 848 |
Mr = 408.44 | Dx = 1.449 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 1908 reflections |
a = 14.9236 (15) Å | θ = 3.0–27.3° |
b = 5.9331 (7) Å | µ = 0.21 mm−1 |
c = 21.425 (2) Å | T = 296 K |
β = 99.338 (2)° | Needle, orange |
V = 1871.9 (4) Å3 | 0.77 × 0.07 × 0.04 mm |
Z = 4 |
Bruker APEXII DUO CCD area-detector diffractometer | 4269 independent reflections |
Radiation source: fine-focus sealed tube | 2889 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.062 |
ϕ and ω scans | θmax = 27.5°, θmin = 1.6° |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | h = −19→19 |
Tmin = 0.856, Tmax = 0.992 | k = −7→7 |
15668 measured reflections | l = −27→27 |
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)] = 0.043 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.106 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | w = 1/[σ2(Fo2) + (0.0401P)2 + 0.4767P] where P = (Fo2 + 2Fc2)/3 |
4269 reflections | (Δ/σ)max = 0.001 |
267 parameters | Δρmax = 0.37 e Å−3 |
0 restraints | Δρmin = −0.29 e Å−3 |
C19H16N6O3S | V = 1871.9 (4) Å3 |
Mr = 408.44 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 14.9236 (15) Å | µ = 0.21 mm−1 |
b = 5.9331 (7) Å | T = 296 K |
c = 21.425 (2) Å | 0.77 × 0.07 × 0.04 mm |
β = 99.338 (2)° |
Bruker APEXII DUO CCD area-detector diffractometer | 4269 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | 2889 reflections with I > 2σ(I) |
Tmin = 0.856, Tmax = 0.992 | Rint = 0.062 |
15668 measured reflections |
R[F2 > 2σ(F2)] = 0.043 | 0 restraints |
wR(F2) = 0.106 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | Δρmax = 0.37 e Å−3 |
4269 reflections | Δρmin = −0.29 e Å−3 |
267 parameters |
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. |
x | y | z | Uiso*/Ueq | ||
S1 | 0.51196 (3) | 0.06066 (11) | 0.18109 (2) | 0.02408 (16) | |
O1 | 0.29051 (9) | −0.7158 (3) | 0.24009 (6) | 0.0274 (4) | |
O2 | 0.43051 (9) | −0.5875 (3) | 0.28329 (6) | 0.0261 (4) | |
O3 | 0.03886 (9) | −0.2449 (3) | −0.06332 (6) | 0.0302 (4) | |
N1 | 0.58722 (11) | 0.3462 (3) | 0.10107 (7) | 0.0197 (4) | |
N2 | 0.53281 (10) | 0.1897 (3) | 0.06401 (7) | 0.0203 (4) | |
N3 | 0.45763 (11) | −0.1430 (3) | 0.06974 (7) | 0.0189 (4) | |
N4 | 0.39709 (10) | −0.2843 (3) | 0.09276 (7) | 0.0185 (4) | |
N5 | 0.26615 (11) | −0.5345 (3) | 0.15329 (7) | 0.0202 (4) | |
N6 | 0.22703 (11) | −0.6811 (4) | 0.18620 (7) | 0.0264 (5) | |
C1 | 0.73234 (13) | 0.6171 (4) | 0.16329 (9) | 0.0242 (5) | |
H1A | 0.7205 | 0.4846 | 0.1837 | 0.029* | |
C2 | 0.79578 (14) | 0.7681 (5) | 0.19293 (10) | 0.0320 (6) | |
H2A | 0.8264 | 0.7369 | 0.2334 | 0.038* | |
C3 | 0.81414 (15) | 0.9647 (5) | 0.16313 (11) | 0.0339 (6) | |
H3A | 0.8574 | 1.0645 | 0.1833 | 0.041* | |
C4 | 0.76819 (14) | 1.0137 (5) | 0.10314 (10) | 0.0287 (6) | |
H4A | 0.7796 | 1.1476 | 0.0833 | 0.034* | |
C5 | 0.70513 (13) | 0.8620 (4) | 0.07295 (9) | 0.0230 (5) | |
H5A | 0.6753 | 0.8936 | 0.0323 | 0.028* | |
C6 | 0.68565 (13) | 0.6638 (4) | 0.10230 (8) | 0.0199 (5) | |
C7 | 0.62003 (13) | 0.5032 (4) | 0.06982 (8) | 0.0204 (5) | |
H7A | 0.6018 | 0.5142 | 0.0263 | 0.025* | |
C8 | 0.50177 (12) | 0.0383 (4) | 0.09904 (8) | 0.0181 (5) | |
C9 | 0.49414 (13) | −0.2359 (4) | 0.19578 (8) | 0.0221 (5) | |
H9A | 0.5470 | −0.3213 | 0.1886 | 0.026* | |
H9B | 0.4866 | −0.2566 | 0.2395 | 0.026* | |
C10 | 0.41158 (12) | −0.3220 (4) | 0.15311 (8) | 0.0191 (5) | |
C11 | 0.34998 (13) | −0.4661 (4) | 0.18046 (8) | 0.0189 (5) | |
C12 | 0.36813 (13) | −0.5822 (4) | 0.23935 (8) | 0.0220 (5) | |
C13 | 0.21053 (12) | −0.4579 (4) | 0.09497 (8) | 0.0199 (5) | |
C14 | 0.17263 (14) | −0.2452 (4) | 0.09297 (9) | 0.0240 (5) | |
H14A | 0.1857 | −0.1480 | 0.1273 | 0.029* | |
C15 | 0.11479 (14) | −0.1796 (5) | 0.03878 (9) | 0.0266 (5) | |
H15A | 0.0881 | −0.0376 | 0.0365 | 0.032* | |
C16 | 0.09668 (13) | −0.3280 (5) | −0.01245 (8) | 0.0227 (5) | |
C17 | 0.13592 (13) | −0.5395 (5) | −0.00988 (9) | 0.0247 (5) | |
H17A | 0.1242 | −0.6363 | −0.0444 | 0.030* | |
C18 | 0.19321 (13) | −0.6064 (4) | 0.04498 (9) | 0.0234 (5) | |
H18A | 0.2194 | −0.7490 | 0.0478 | 0.028* | |
C19 | 0.01814 (14) | −0.3879 (5) | −0.11771 (9) | 0.0340 (7) | |
H19A | −0.0240 | −0.3128 | −0.1496 | 0.051* | |
H19B | −0.0084 | −0.5258 | −0.1059 | 0.051* | |
H19C | 0.0729 | −0.4210 | −0.1340 | 0.051* | |
H1N3 | 0.4553 (16) | −0.161 (5) | 0.0291 (12) | 0.041 (7)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0287 (3) | 0.0285 (4) | 0.0149 (2) | −0.0068 (3) | 0.00304 (18) | −0.0044 (2) |
O1 | 0.0302 (8) | 0.0318 (12) | 0.0200 (6) | −0.0042 (8) | 0.0033 (6) | 0.0077 (7) |
O2 | 0.0281 (7) | 0.0319 (12) | 0.0177 (6) | 0.0013 (8) | 0.0016 (5) | 0.0023 (7) |
O3 | 0.0242 (7) | 0.0414 (13) | 0.0238 (7) | 0.0037 (8) | 0.0003 (6) | 0.0051 (7) |
N1 | 0.0198 (8) | 0.0190 (12) | 0.0199 (7) | −0.0040 (9) | 0.0022 (6) | −0.0060 (8) |
N2 | 0.0207 (8) | 0.0229 (13) | 0.0170 (7) | −0.0048 (9) | 0.0018 (6) | −0.0034 (8) |
N3 | 0.0239 (8) | 0.0198 (12) | 0.0134 (7) | −0.0055 (9) | 0.0043 (6) | −0.0014 (7) |
N4 | 0.0185 (8) | 0.0200 (12) | 0.0176 (7) | −0.0032 (8) | 0.0046 (6) | −0.0006 (7) |
N5 | 0.0213 (8) | 0.0217 (12) | 0.0186 (7) | −0.0008 (9) | 0.0059 (6) | 0.0017 (8) |
N6 | 0.0282 (9) | 0.0287 (14) | 0.0218 (8) | −0.0087 (10) | 0.0021 (7) | 0.0045 (8) |
C1 | 0.0245 (10) | 0.0246 (16) | 0.0233 (9) | 0.0005 (11) | 0.0030 (8) | 0.0008 (10) |
C2 | 0.0273 (11) | 0.0363 (19) | 0.0287 (10) | −0.0002 (13) | −0.0061 (9) | −0.0048 (11) |
C3 | 0.0263 (11) | 0.0294 (18) | 0.0441 (12) | −0.0085 (12) | 0.0003 (10) | −0.0118 (12) |
C4 | 0.0258 (10) | 0.0220 (16) | 0.0404 (11) | −0.0015 (11) | 0.0113 (9) | −0.0006 (11) |
C5 | 0.0225 (10) | 0.0235 (15) | 0.0237 (9) | 0.0006 (11) | 0.0063 (8) | 0.0005 (10) |
C6 | 0.0188 (9) | 0.0213 (15) | 0.0203 (9) | −0.0011 (10) | 0.0052 (7) | −0.0033 (9) |
C7 | 0.0216 (9) | 0.0217 (15) | 0.0175 (8) | 0.0005 (10) | 0.0021 (7) | −0.0023 (9) |
C8 | 0.0156 (8) | 0.0227 (14) | 0.0156 (8) | 0.0003 (10) | 0.0011 (7) | −0.0040 (9) |
C9 | 0.0215 (9) | 0.0277 (16) | 0.0166 (8) | −0.0040 (11) | 0.0018 (7) | 0.0024 (9) |
C10 | 0.0187 (9) | 0.0217 (15) | 0.0173 (8) | 0.0001 (10) | 0.0042 (7) | −0.0026 (9) |
C11 | 0.0191 (9) | 0.0207 (14) | 0.0172 (8) | 0.0008 (10) | 0.0039 (7) | −0.0004 (9) |
C12 | 0.0259 (10) | 0.0223 (15) | 0.0196 (9) | 0.0026 (11) | 0.0093 (8) | −0.0001 (9) |
C13 | 0.0165 (9) | 0.0244 (15) | 0.0187 (8) | −0.0056 (10) | 0.0026 (7) | −0.0009 (9) |
C14 | 0.0274 (10) | 0.0234 (15) | 0.0219 (9) | −0.0004 (12) | 0.0059 (8) | −0.0014 (10) |
C15 | 0.0297 (11) | 0.0238 (16) | 0.0271 (10) | 0.0012 (12) | 0.0069 (8) | 0.0014 (10) |
C16 | 0.0161 (9) | 0.0309 (17) | 0.0215 (9) | −0.0018 (11) | 0.0047 (7) | 0.0035 (10) |
C17 | 0.0235 (10) | 0.0282 (16) | 0.0226 (9) | −0.0046 (12) | 0.0041 (8) | −0.0049 (10) |
C18 | 0.0211 (9) | 0.0241 (16) | 0.0251 (9) | −0.0014 (11) | 0.0039 (8) | −0.0023 (10) |
C19 | 0.0268 (11) | 0.051 (2) | 0.0227 (10) | −0.0061 (13) | −0.0011 (8) | 0.0030 (11) |
S1—C8 | 1.7448 (17) | C4—C5 | 1.384 (3) |
S1—C9 | 1.814 (3) | C4—H4A | 0.9300 |
O1—N6 | 1.385 (2) | C5—C6 | 1.387 (3) |
O1—C12 | 1.406 (3) | C5—H5A | 0.9300 |
O2—C12 | 1.212 (2) | C6—C7 | 1.459 (3) |
O3—C16 | 1.368 (2) | C7—H7A | 0.9300 |
O3—C19 | 1.434 (3) | C9—C10 | 1.500 (3) |
N1—C7 | 1.289 (3) | C9—H9A | 0.9700 |
N1—N2 | 1.394 (2) | C9—H9B | 0.9700 |
N2—C8 | 1.303 (3) | C10—C11 | 1.447 (3) |
N3—C8 | 1.360 (3) | C11—C12 | 1.425 (3) |
N3—N4 | 1.381 (2) | C13—C18 | 1.379 (3) |
N3—H1N3 | 0.87 (2) | C13—C14 | 1.381 (3) |
N4—C10 | 1.295 (2) | C14—C15 | 1.385 (3) |
N5—N6 | 1.314 (2) | C14—H14A | 0.9300 |
N5—C11 | 1.354 (2) | C15—C16 | 1.399 (3) |
N5—C13 | 1.456 (2) | C15—H15A | 0.9300 |
C1—C2 | 1.381 (3) | C16—C17 | 1.382 (3) |
C1—C6 | 1.405 (3) | C17—C18 | 1.394 (3) |
C1—H1A | 0.9300 | C17—H17A | 0.9300 |
C2—C3 | 1.378 (4) | C18—H18A | 0.9300 |
C2—H2A | 0.9300 | C19—H19A | 0.9600 |
C3—C4 | 1.386 (3) | C19—H19B | 0.9600 |
C3—H3A | 0.9300 | C19—H19C | 0.9600 |
C8—S1—C9 | 96.30 (10) | C10—C9—H9A | 109.5 |
N6—O1—C12 | 111.11 (15) | S1—C9—H9A | 109.5 |
C16—O3—C19 | 117.3 (2) | C10—C9—H9B | 109.5 |
C7—N1—N2 | 114.88 (15) | S1—C9—H9B | 109.5 |
C8—N2—N1 | 111.09 (15) | H9A—C9—H9B | 108.1 |
C8—N3—N4 | 127.66 (15) | N4—C10—C11 | 119.49 (18) |
C8—N3—H1N3 | 119.9 (18) | N4—C10—C9 | 122.47 (18) |
N4—N3—H1N3 | 111.0 (17) | C11—C10—C9 | 117.88 (16) |
C10—N4—N3 | 116.66 (16) | N5—C11—C12 | 105.40 (18) |
N6—N5—C11 | 115.31 (16) | N5—C11—C10 | 127.34 (17) |
N6—N5—C13 | 115.21 (16) | C12—C11—C10 | 127.04 (17) |
C11—N5—C13 | 129.33 (17) | O2—C12—O1 | 120.48 (19) |
N5—N6—O1 | 104.03 (15) | O2—C12—C11 | 135.4 (2) |
C2—C1—C6 | 119.9 (2) | O1—C12—C11 | 104.12 (16) |
C2—C1—H1A | 120.0 | C18—C13—C14 | 122.39 (19) |
C6—C1—H1A | 120.0 | C18—C13—N5 | 118.4 (2) |
C3—C2—C1 | 120.6 (2) | C14—C13—N5 | 119.06 (18) |
C3—C2—H2A | 119.7 | C13—C14—C15 | 118.6 (2) |
C1—C2—H2A | 119.7 | C13—C14—H14A | 120.7 |
C2—C3—C4 | 120.1 (2) | C15—C14—H14A | 120.7 |
C2—C3—H3A | 120.0 | C14—C15—C16 | 119.7 (2) |
C4—C3—H3A | 120.0 | C14—C15—H15A | 120.1 |
C5—C4—C3 | 119.6 (2) | C16—C15—H15A | 120.1 |
C5—C4—H4A | 120.2 | O3—C16—C17 | 124.6 (2) |
C3—C4—H4A | 120.2 | O3—C16—C15 | 114.5 (2) |
C4—C5—C6 | 121.07 (19) | C17—C16—C15 | 120.89 (19) |
C4—C5—H5A | 119.5 | C16—C17—C18 | 119.3 (2) |
C6—C5—H5A | 119.5 | C16—C17—H17A | 120.3 |
C5—C6—C1 | 118.7 (2) | C18—C17—H17A | 120.3 |
C5—C6—C7 | 120.74 (18) | C13—C18—C17 | 119.0 (2) |
C1—C6—C7 | 120.5 (2) | C13—C18—H18A | 120.5 |
N1—C7—C6 | 120.39 (17) | C17—C18—H18A | 120.5 |
N1—C7—H7A | 119.8 | O3—C19—H19A | 109.5 |
C6—C7—H7A | 119.8 | O3—C19—H19B | 109.5 |
N2—C8—N3 | 118.03 (16) | H19A—C19—H19B | 109.5 |
N2—C8—S1 | 123.16 (17) | O3—C19—H19C | 109.5 |
N3—C8—S1 | 118.79 (15) | H19A—C19—H19C | 109.5 |
C10—C9—S1 | 110.72 (15) | H19B—C19—H19C | 109.5 |
C7—N1—N2—C8 | −179.44 (19) | N6—N5—C11—C10 | 174.4 (2) |
C8—N3—N4—C10 | −33.8 (3) | C13—N5—C11—C10 | −10.3 (4) |
C11—N5—N6—O1 | −0.5 (2) | N4—C10—C11—N5 | −14.9 (4) |
C13—N5—N6—O1 | −176.51 (17) | C9—C10—C11—N5 | 169.6 (2) |
C12—O1—N6—N5 | 1.3 (2) | N4—C10—C11—C12 | 158.9 (2) |
C6—C1—C2—C3 | −0.2 (3) | C9—C10—C11—C12 | −16.6 (3) |
C1—C2—C3—C4 | 0.7 (4) | N6—O1—C12—O2 | 178.8 (2) |
C2—C3—C4—C5 | −1.3 (3) | N6—O1—C12—C11 | −1.6 (2) |
C3—C4—C5—C6 | 1.4 (3) | N5—C11—C12—O2 | −179.3 (3) |
C4—C5—C6—C1 | −1.0 (3) | C10—C11—C12—O2 | 5.8 (4) |
C4—C5—C6—C7 | −179.12 (19) | N5—C11—C12—O1 | 1.2 (2) |
C2—C1—C6—C5 | 0.4 (3) | C10—C11—C12—O1 | −173.7 (2) |
C2—C1—C6—C7 | 178.52 (19) | N6—N5—C13—C18 | −71.5 (2) |
N2—N1—C7—C6 | −173.51 (17) | C11—N5—C13—C18 | 113.2 (3) |
C5—C6—C7—N1 | −164.7 (2) | N6—N5—C13—C14 | 104.6 (2) |
C1—C6—C7—N1 | 17.2 (3) | C11—N5—C13—C14 | −70.7 (3) |
N1—N2—C8—N3 | −171.36 (17) | C18—C13—C14—C15 | 0.3 (3) |
N1—N2—C8—S1 | 10.1 (2) | N5—C13—C14—C15 | −175.62 (17) |
N4—N3—C8—N2 | −158.81 (19) | C13—C14—C15—C16 | −0.5 (3) |
N4—N3—C8—S1 | 19.8 (3) | C19—O3—C16—C17 | −0.3 (3) |
C9—S1—C8—N2 | −160.46 (18) | C19—O3—C16—C15 | 179.43 (17) |
C9—S1—C8—N3 | 21.05 (18) | C14—C15—C16—O3 | −179.88 (18) |
C8—S1—C9—C10 | −49.20 (14) | C14—C15—C16—C17 | −0.1 (3) |
N3—N4—C10—C11 | 179.15 (19) | O3—C16—C17—C18 | −179.35 (17) |
N3—N4—C10—C9 | −5.5 (3) | C15—C16—C17—C18 | 1.0 (3) |
S1—C9—C10—N4 | 48.2 (3) | C14—C13—C18—C17 | 0.5 (3) |
S1—C9—C10—C11 | −136.34 (18) | N5—C13—C18—C17 | 176.44 (17) |
N6—N5—C11—C12 | −0.4 (3) | C16—C17—C18—C13 | −1.1 (3) |
C13—N5—C11—C12 | 174.9 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H1N3···N2i | 0.87 (3) | 2.04 (3) | 2.905 (2) | 173 (2) |
C9—H9B···O2 | 0.97 | 2.39 | 3.057 (3) | 126 |
Symmetry code: (i) −x+1, −y, −z. |
Experimental details
Crystal data | |
Chemical formula | C19H16N6O3S |
Mr | 408.44 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 296 |
a, b, c (Å) | 14.9236 (15), 5.9331 (7), 21.425 (2) |
β (°) | 99.338 (2) |
V (Å3) | 1871.9 (4) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.21 |
Crystal size (mm) | 0.77 × 0.07 × 0.04 |
Data collection | |
Diffractometer | Bruker APEXII DUO CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2009) |
Tmin, Tmax | 0.856, 0.992 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 15668, 4269, 2889 |
Rint | 0.062 |
(sin θ/λ)max (Å−1) | 0.649 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.043, 0.106, 1.03 |
No. of reflections | 4269 |
No. of parameters | 267 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.37, −0.29 |
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 |
N3—H1N3···N2i | 0.87 (3) | 2.04 (3) | 2.905 (2) | 173 (2) |
C9—H9B···O2 | 0.9700 | 2.3900 | 3.057 (3) | 126.00 |
Symmetry code: (i) −x+1, −y, −z. |
Footnotes
‡Thomson Reuters ResearcherID: A-3561-2009.
Acknowledgements
HKF and MH thank the Malaysian Government and Universiti Sains Malaysia for Research University grant No. 1001/PFIZIK/811160. MH also thanks Universiti Sains Malaysia for a postdoctoral research fellowship.
References
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Sydnones constitute a well defined class of mesoionic compounds consisting of 1,2,3-oxadiazole ring system. The introduction of the concept of mesoionic structure for certain heterocyclic compounds in the year 1949 has proved to be a fruitful development in heterocyclic chemistry (Baker et al., 1949). The study of sydnones still remains a field of interest because of their electronic structures and also because of the various types of biological activities displayed by some of them. Interest in sydnone derivatives has also been encouraged by the discovery that they exhibit various pharmacological activities (Hedge et al., 2008; Rai et al., 2008). Encouraged by these reports and in continuation of our research for biologically active nitrogen-containing heterocycles, a thiadiazine moiety at the 4-position of the phenylsydnone was introduced. A series of thiadiazines were synthesized by the condensation of 4-bromoacetyl-3-arylsydnones with N'-[phenylmethylidene]carbonohydrazide. 4-Bromoacetyl-3-arylsydnones were in turn obtained by the photochemical bromination of 4-acetyl-3-arylsydnones (Kalluraya et al., 2003).
In the title compound (Fig. 1), the 3,6-dihydro-1,3,4-thiadiazine ring (C8–C10/N3/N4/S1) adopts twist-boat conformation, with puckering parameters Q = 0.5852 (18) Å, Θ = 109.67 (18)° and ϕ = 138.84 (19)° (Cremer & Pople, 1975). The dihedral angle between the methoxy-substituted benzene ring (C13–C18) and the oxadiazole ring (C11–C12/O1/N5–N6) is 71.91 (7)°. In the crystal structure (Fig. 2), centrosymmetrically related molecules are linked into dimers via pairs of intermolecular N—H···N hydrogen bonds, generating an R22(8) ring motif. There is an intramolecular C—H···O hydrogen bond which generates an S(6) ring motif.