organic compounds
rac-(E)-3-[1-(2-Chlorophenyl)ethyl]-5-methyl-N-nitro-1,3,5-oxadiazinan-4-imine
aCollege of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, People's Republic of China
*Correspondence e-mail: qknhs@yahoo.com.cn
In the title compound, C12H15ClN4O3, which has potential insecticidal activity, the oxadiazine ring and the benzene ring make a dihedral angle of 84.63 (2)° to one another. The crystal packing involves weak intermolecular C—H⋯O hydrogen bonds.
Related literature
For the biological activity of oxadiazine derivatives, see: Maienfisch & Huerlimann (1994); Gsell & Maienfisch (1998). For the synthesis, see: Gottfied et al. (2001). For related structures, see: Chopra et al. (2004); Kang et al. (2008); Zhong et al. (2010). For puckering parameters, see: Cremer & Pople (1975).
Experimental
Crystal data
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Refinement
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Data collection: CrystalClear (Rigaku, 2005); cell CrystalClear; data reduction: CrystalClear; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEPIII (Burnett & Johnson, 1996); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).
Supporting information
https://doi.org/10.1107/S1600536810034343/zs2061sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810034343/zs2061Isup2.hkl
A solution of 1-(1-bromoethyl)-2-chlorobenzene (4.3 g, 20 mmol), N-nitro-1,3,5-oxadiazinan-4-imine (3.2 g, 20 mmol) and potassium carbonate (2.8 g, 20 mmol) in 20 g of acetonitrile was heated under reflux for 4 h. Upon cooling to room temperature the solution was filtered and then concentrated under reduced pressure to give the title compound (I) (7.89 g, 90% yield) (Gottfried, et al., 2001). Single crystals suitable for X-ray measurement were obtained by recrystallization from ethanol at room temperature.
All C-bound H atoms were placed in calculated positions, with C—H = 0.95-0.97 Å, and included in the final cycles of
using a riding model, with Uiso(H) = 1.2Ueq(C).Currently, studies on oxadiazine derivatives have mainly concentrated on compounds with oxadiazine as the only active group (Gsell, et al., 1998) and a number of highly insecticidal compounds of this type have been synthesized (Maienfisch et al., 1994). We report here the synthesis and
of the title compound C12H15Cl1N4O3 (I).In (I) (Fig. 1) the bond lengths and angles of the oxadiazine rings are in agreement with those in previous reported structures (Chopra et al., 2004). The 1,3,5-oxadiazinane ring is in a half-chair conformation and the ring-puckering parameters (Cremer & Pople, 1975;) were calculated as Q = 0.05126 (12) Å; θ = 121.33 (13)°; φ = 166.3676 (15)°. The N3═O bondlength [1.3904 (17) Å] is close to the value reported in the literature (Zhong et al., 2010). The oxadiazine ring and the benzene ring make a dihedral angle of 84.63 (2)°. Weak intermolecular C—H···O hydrogen bonds give a three-dimensional network (Table 1).
For the biological activity of oxadiazine derivatives, see: Maienfisch & Huerlimann (1994); Gsell & Maienfisch (1998). For the synthesis, see: Gottfied et al. (2001). For related structures, see: Chopra et al. (2004); Kang et al. (2008); Zhong et al. (2010). For puckering parameters, see: Cremer & Pople (1975).
Data collection: CrystalClear (Rigaku, 2005); cell
CrystalClear (Rigaku, 2005); data reduction: CrystalClear (Rigaku, 2005); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEPIII (Burnett & Johnson, 1996); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).Fig. 1. Molecular configuration and atom numbering scheme for the title compound (I), with displacement ellipsoids drawn at the 50% probability level. |
C12H15ClN4O3 | F(000) = 624 |
Mr = 298.73 | Dx = 1.450 Mg m−3 |
Monoclinic, P21/c | Cu Kα radiation, λ = 1.54187 Å |
Hall symbol: -P 2ybc | Cell parameters from 1058 reflections |
a = 17.259 (4) Å | θ = 27.5–71.9° |
b = 6.9157 (14) Å | µ = 2.61 mm−1 |
c = 12.169 (2) Å | T = 113 K |
β = 109.63 (3)° | Block, colorless |
V = 1368.0 (5) Å3 | 0.26 × 0.22 × 0.18 mm |
Z = 4 |
Rigaku Saturn diffractometer | 2590 independent reflections |
Radiation source: fine-focus sealed tube | 2562 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.054 |
Detector resolution: 14.63 pixels mm-1 | θmax = 72.1°, θmin = 2.7° |
ω scans | h = −20→21 |
Absorption correction: multi-scan (CrystalClear; Rigaku, 2005) | k = −8→8 |
Tmin = 0.550, Tmax = 0.651 | l = −13→14 |
12087 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-atom parameters constrained |
wR(F2) = 0.104 | w = 1/[σ2(Fo2) + (0.058P)2 + 0.6637P] where P = (Fo2 + 2Fc2)/3 |
S = 1.08 | (Δ/σ)max = 0.001 |
2590 reflections | Δρmax = 0.26 e Å−3 |
184 parameters | Δρmin = −0.37 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: 0.0057 (11) |
C12H15ClN4O3 | V = 1368.0 (5) Å3 |
Mr = 298.73 | Z = 4 |
Monoclinic, P21/c | Cu Kα radiation |
a = 17.259 (4) Å | µ = 2.61 mm−1 |
b = 6.9157 (14) Å | T = 113 K |
c = 12.169 (2) Å | 0.26 × 0.22 × 0.18 mm |
β = 109.63 (3)° |
Rigaku Saturn diffractometer | 2590 independent reflections |
Absorption correction: multi-scan (CrystalClear; Rigaku, 2005) | 2562 reflections with I > 2σ(I) |
Tmin = 0.550, Tmax = 0.651 | Rint = 0.054 |
12087 measured reflections |
R[F2 > 2σ(F2)] = 0.039 | 0 restraints |
wR(F2) = 0.104 | H-atom parameters constrained |
S = 1.08 | Δρmax = 0.26 e Å−3 |
2590 reflections | Δρmin = −0.37 e Å−3 |
184 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 | ||
Cl1 | 0.36163 (2) | 0.37729 (6) | −0.00540 (3) | 0.02744 (17) | |
N1 | 0.09670 (7) | 0.33360 (16) | −0.04098 (10) | 0.0152 (3) | |
N2 | 0.21260 (7) | 0.48468 (16) | 0.08081 (10) | 0.0146 (3) | |
N3 | 0.19653 (7) | 0.15435 (16) | 0.10592 (10) | 0.0165 (3) | |
N4 | 0.15382 (7) | 0.09523 (17) | 0.17188 (10) | 0.0172 (3) | |
O1 | 0.09734 (6) | 0.67120 (14) | −0.01841 (9) | 0.0180 (2) | |
O2 | 0.09602 (7) | 0.19372 (16) | 0.18398 (9) | 0.0247 (3) | |
O3 | 0.17457 (7) | −0.06237 (15) | 0.22426 (9) | 0.0238 (3) | |
C1 | 0.06227 (8) | 0.5189 (2) | −0.09525 (12) | 0.0171 (3) | |
H1A | 0.0740 | 0.5363 | −0.1689 | 0.021* | |
H1B | 0.0018 | 0.5188 | −0.1139 | 0.021* | |
C2 | 0.16607 (8) | 0.32676 (19) | 0.04897 (12) | 0.0138 (3) | |
C3 | 0.18404 (8) | 0.66306 (19) | 0.01450 (13) | 0.0172 (3) | |
H3A | 0.2089 | 0.7767 | 0.0630 | 0.021* | |
H3B | 0.2007 | 0.6644 | −0.0558 | 0.021* | |
C4 | 0.04698 (9) | 0.1625 (2) | −0.08861 (13) | 0.0196 (3) | |
H4A | 0.0801 | 0.0459 | −0.0611 | 0.029* | |
H4B | 0.0285 | 0.1670 | −0.1740 | 0.029* | |
H4C | −0.0010 | 0.1599 | −0.0626 | 0.029* | |
C5 | 0.28920 (8) | 0.48416 (19) | 0.18389 (12) | 0.0171 (3) | |
H5 | 0.3141 | 0.3524 | 0.1894 | 0.020* | |
C6 | 0.26984 (10) | 0.5185 (2) | 0.29596 (12) | 0.0225 (3) | |
H6A | 0.3212 | 0.5198 | 0.3627 | 0.034* | |
H6B | 0.2342 | 0.4147 | 0.3061 | 0.034* | |
H6C | 0.2418 | 0.6430 | 0.2910 | 0.034* | |
C7 | 0.34952 (8) | 0.6269 (2) | 0.16156 (13) | 0.0184 (3) | |
C8 | 0.38573 (9) | 0.5900 (2) | 0.07689 (13) | 0.0209 (3) | |
C9 | 0.44068 (9) | 0.7161 (2) | 0.05401 (14) | 0.0257 (4) | |
H9 | 0.4640 | 0.6869 | −0.0045 | 0.031* | |
C10 | 0.46123 (10) | 0.8863 (2) | 0.11817 (16) | 0.0305 (4) | |
H10 | 0.4997 | 0.9733 | 0.1048 | 0.037* | |
C11 | 0.42544 (10) | 0.9287 (2) | 0.20160 (15) | 0.0308 (4) | |
H11 | 0.4389 | 1.0459 | 0.2445 | 0.037* | |
C12 | 0.37004 (9) | 0.8007 (2) | 0.22283 (13) | 0.0247 (3) | |
H12 | 0.3457 | 0.8320 | 0.2800 | 0.030* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cl1 | 0.0282 (2) | 0.0206 (2) | 0.0376 (3) | −0.00083 (13) | 0.01641 (18) | −0.00617 (14) |
N1 | 0.0166 (6) | 0.0106 (5) | 0.0167 (6) | −0.0008 (4) | 0.0035 (4) | −0.0001 (4) |
N2 | 0.0146 (5) | 0.0095 (5) | 0.0179 (6) | 0.0011 (4) | 0.0029 (4) | 0.0012 (4) |
N3 | 0.0171 (6) | 0.0104 (5) | 0.0226 (6) | 0.0015 (4) | 0.0075 (5) | 0.0038 (4) |
N4 | 0.0216 (6) | 0.0110 (5) | 0.0182 (6) | 0.0015 (5) | 0.0058 (5) | 0.0019 (4) |
O1 | 0.0167 (5) | 0.0119 (5) | 0.0225 (5) | 0.0038 (4) | 0.0030 (4) | −0.0010 (4) |
O2 | 0.0286 (6) | 0.0209 (6) | 0.0301 (6) | 0.0107 (4) | 0.0170 (5) | 0.0072 (4) |
O3 | 0.0338 (6) | 0.0117 (5) | 0.0275 (6) | 0.0059 (4) | 0.0123 (4) | 0.0083 (4) |
C1 | 0.0168 (6) | 0.0134 (6) | 0.0183 (7) | 0.0022 (5) | 0.0021 (5) | 0.0009 (5) |
C2 | 0.0156 (6) | 0.0100 (6) | 0.0173 (6) | 0.0016 (5) | 0.0077 (5) | −0.0003 (5) |
C3 | 0.0165 (7) | 0.0099 (6) | 0.0226 (7) | 0.0010 (5) | 0.0032 (5) | 0.0035 (5) |
C4 | 0.0204 (7) | 0.0144 (6) | 0.0222 (7) | −0.0049 (5) | 0.0048 (6) | −0.0024 (5) |
C5 | 0.0163 (6) | 0.0123 (6) | 0.0190 (7) | 0.0019 (5) | 0.0011 (5) | 0.0014 (5) |
C6 | 0.0274 (7) | 0.0183 (7) | 0.0192 (7) | 0.0004 (6) | 0.0042 (6) | 0.0019 (5) |
C7 | 0.0149 (6) | 0.0136 (7) | 0.0216 (7) | 0.0010 (5) | −0.0006 (5) | 0.0026 (5) |
C8 | 0.0157 (6) | 0.0157 (7) | 0.0270 (8) | 0.0018 (5) | 0.0015 (6) | 0.0030 (6) |
C9 | 0.0182 (7) | 0.0267 (8) | 0.0298 (8) | 0.0013 (6) | 0.0047 (6) | 0.0093 (6) |
C10 | 0.0211 (8) | 0.0248 (8) | 0.0372 (9) | −0.0083 (6) | −0.0013 (7) | 0.0108 (7) |
C11 | 0.0302 (8) | 0.0187 (7) | 0.0325 (9) | −0.0086 (7) | −0.0042 (7) | 0.0003 (6) |
C12 | 0.0249 (7) | 0.0185 (7) | 0.0242 (7) | −0.0029 (6) | −0.0004 (6) | −0.0013 (6) |
Cl1—C8 | 1.7492 (16) | C4—H4B | 0.9800 |
N1—C2 | 1.324 (2) | C4—H4C | 0.9800 |
N1—C4 | 1.4621 (17) | C5—C7 | 1.524 (2) |
N1—C1 | 1.4721 (17) | C5—C6 | 1.528 (2) |
N2—C2 | 1.3336 (18) | C5—H5 | 1.0000 |
N2—C3 | 1.4658 (16) | C6—H6A | 0.9800 |
N2—C5 | 1.4856 (17) | C6—H6B | 0.9800 |
N3—N4 | 1.3237 (17) | C6—H6C | 0.9800 |
N3—C2 | 1.3904 (17) | C7—C12 | 1.396 (2) |
N4—O3 | 1.2526 (15) | C7—C8 | 1.396 (2) |
N4—O2 | 1.2567 (16) | C8—C9 | 1.384 (2) |
O1—C1 | 1.4037 (17) | C9—C10 | 1.391 (2) |
O1—C3 | 1.4143 (18) | C9—H9 | 0.9500 |
C1—H1A | 0.9900 | C10—C11 | 1.386 (3) |
C1—H1B | 0.9900 | C10—H10 | 0.9500 |
C3—H3A | 0.9900 | C11—C12 | 1.389 (2) |
C3—H3B | 0.9900 | C11—H11 | 0.9500 |
C4—H4A | 0.9800 | C12—H12 | 0.9500 |
C2—N1—C4 | 123.09 (11) | H4B—C4—H4C | 109.5 |
C2—N1—C1 | 121.23 (11) | N2—C5—C7 | 108.38 (11) |
C4—N1—C1 | 115.58 (11) | N2—C5—C6 | 110.73 (11) |
C2—N2—C3 | 118.10 (11) | C7—C5—C6 | 115.21 (12) |
C2—N2—C5 | 121.43 (11) | N2—C5—H5 | 107.4 |
C3—N2—C5 | 120.40 (11) | C7—C5—H5 | 107.4 |
N4—N3—C2 | 111.90 (11) | C6—C5—H5 | 107.4 |
O3—N4—O2 | 120.96 (12) | C5—C6—H6A | 109.5 |
O3—N4—N3 | 117.07 (11) | C5—C6—H6B | 109.5 |
O2—N4—N3 | 121.95 (11) | H6A—C6—H6B | 109.5 |
C1—O1—C3 | 109.70 (10) | C5—C6—H6C | 109.5 |
O1—C1—N1 | 109.62 (11) | H6A—C6—H6C | 109.5 |
O1—C1—H1A | 109.7 | H6B—C6—H6C | 109.5 |
N1—C1—H1A | 109.7 | C12—C7—C8 | 117.08 (14) |
O1—C1—H1B | 109.7 | C12—C7—C5 | 121.90 (14) |
N1—C1—H1B | 109.7 | C8—C7—C5 | 121.02 (13) |
H1A—C1—H1B | 108.2 | C9—C8—C7 | 122.70 (14) |
N1—C2—N2 | 119.99 (12) | C9—C8—Cl1 | 117.52 (13) |
N1—C2—N3 | 121.87 (12) | C7—C8—Cl1 | 119.78 (11) |
N2—C2—N3 | 117.88 (12) | C8—C9—C10 | 118.89 (16) |
O1—C3—N2 | 108.51 (11) | C8—C9—H9 | 120.6 |
O1—C3—H3A | 110.0 | C10—C9—H9 | 120.6 |
N2—C3—H3A | 110.0 | C11—C10—C9 | 119.87 (15) |
O1—C3—H3B | 110.0 | C11—C10—H10 | 120.1 |
N2—C3—H3B | 110.0 | C9—C10—H10 | 120.1 |
H3A—C3—H3B | 108.4 | C10—C11—C12 | 120.38 (15) |
N1—C4—H4A | 109.5 | C10—C11—H11 | 119.8 |
N1—C4—H4B | 109.5 | C12—C11—H11 | 119.8 |
H4A—C4—H4B | 109.5 | C11—C12—C7 | 121.07 (16) |
N1—C4—H4C | 109.5 | C11—C12—H12 | 119.5 |
H4A—C4—H4C | 109.5 | C7—C12—H12 | 119.5 |
C2—N3—N4—O3 | 177.78 (11) | C3—N2—C5—C7 | −33.89 (16) |
C2—N3—N4—O2 | −3.68 (18) | C2—N2—C5—C6 | −83.61 (15) |
C3—O1—C1—N1 | 55.36 (14) | C3—N2—C5—C6 | 93.38 (14) |
C2—N1—C1—O1 | −18.08 (18) | N2—C5—C7—C12 | 110.06 (14) |
C4—N1—C1—O1 | 158.55 (12) | C6—C5—C7—C12 | −14.60 (19) |
C4—N1—C2—N2 | 173.37 (12) | N2—C5—C7—C8 | −68.88 (16) |
C1—N1—C2—N2 | −10.3 (2) | C6—C5—C7—C8 | 166.46 (13) |
C4—N1—C2—N3 | −0.6 (2) | C12—C7—C8—C9 | 0.9 (2) |
C1—N1—C2—N3 | 175.73 (12) | C5—C7—C8—C9 | 179.93 (13) |
C3—N2—C2—N1 | 0.66 (19) | C12—C7—C8—Cl1 | −178.83 (10) |
C5—N2—C2—N1 | 177.72 (12) | C5—C7—C8—Cl1 | 0.15 (18) |
C3—N2—C2—N3 | 174.91 (11) | C7—C8—C9—C10 | 0.4 (2) |
C5—N2—C2—N3 | −8.03 (19) | Cl1—C8—C9—C10 | −179.86 (11) |
N4—N3—C2—N1 | −73.97 (16) | C8—C9—C10—C11 | −1.3 (2) |
N4—N3—C2—N2 | 111.90 (14) | C9—C10—C11—C12 | 1.0 (2) |
C1—O1—C3—N2 | −64.67 (14) | C10—C11—C12—C7 | 0.4 (2) |
C2—N2—C3—O1 | 36.13 (16) | C8—C7—C12—C11 | −1.3 (2) |
C5—N2—C3—O1 | −140.96 (12) | C5—C7—C12—C11 | 179.72 (13) |
C2—N2—C5—C7 | 149.11 (13) |
D—H···A | D—H | H···A | D···A | D—H···A |
C1—H1A···O2i | 0.99 | 2.52 | 3.2817 (18) | 134 |
C1—H1A···O3i | 0.99 | 2.50 | 3.396 (2) | 150 |
C1—H1B···O2ii | 0.99 | 2.56 | 3.2555 (18) | 127 |
C3—H3A···O3iii | 0.99 | 2.49 | 3.2294 (19) | 131 |
C4—H4B···O2i | 0.98 | 2.57 | 3.3070 (19) | 132 |
C4—H4C···O1ii | 0.98 | 2.49 | 3.377 (2) | 150 |
C6—H6C···O3iii | 0.98 | 2.35 | 3.3020 (19) | 164 |
Symmetry codes: (i) x, −y+1/2, z−1/2; (ii) −x, −y+1, −z; (iii) x, y+1, z. |
Experimental details
Crystal data | |
Chemical formula | C12H15ClN4O3 |
Mr | 298.73 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 113 |
a, b, c (Å) | 17.259 (4), 6.9157 (14), 12.169 (2) |
β (°) | 109.63 (3) |
V (Å3) | 1368.0 (5) |
Z | 4 |
Radiation type | Cu Kα |
µ (mm−1) | 2.61 |
Crystal size (mm) | 0.26 × 0.22 × 0.18 |
Data collection | |
Diffractometer | Rigaku Saturn |
Absorption correction | Multi-scan (CrystalClear; Rigaku, 2005) |
Tmin, Tmax | 0.550, 0.651 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 12087, 2590, 2562 |
Rint | 0.054 |
(sin θ/λ)max (Å−1) | 0.617 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.039, 0.104, 1.08 |
No. of reflections | 2590 |
No. of parameters | 184 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.26, −0.37 |
Computer programs: CrystalClear (Rigaku, 2005), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEPIII (Burnett & Johnson, 1996), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
C1—H1A···O2i | 0.99 | 2.52 | 3.2817 (18) | 133.8 |
C1—H1A···O3i | 0.99 | 2.50 | 3.396 (2) | 150.2 |
C1—H1B···O2ii | 0.99 | 2.56 | 3.2555 (18) | 127.0 |
C3—H3A···O3iii | 0.99 | 2.49 | 3.2294 (19) | 130.8 |
C4—H4B···O2i | 0.98 | 2.57 | 3.3070 (19) | 131.6 |
C4—H4C···O1ii | 0.98 | 2.49 | 3.377 (2) | 150.2 |
C6—H6C···O3iii | 0.98 | 2.35 | 3.3020 (19) | 163.6 |
Symmetry codes: (i) x, −y+1/2, z−1/2; (ii) −x, −y+1, −z; (iii) x, y+1, z. |
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Currently, studies on oxadiazine derivatives have mainly concentrated on compounds with oxadiazine as the only active group (Gsell, et al., 1998) and a number of highly insecticidal compounds of this type have been synthesized (Maienfisch et al., 1994). We report here the synthesis and crystal structure of the title compound C12H15Cl1N4O3 (I).
In (I) (Fig. 1) the bond lengths and angles of the oxadiazine rings are in agreement with those in previous reported structures (Chopra et al., 2004). The 1,3,5-oxadiazinane ring is in a half-chair conformation and the ring-puckering parameters (Cremer & Pople, 1975;) were calculated as Q = 0.05126 (12) Å; θ = 121.33 (13)°; φ = 166.3676 (15)°. The N3═O bondlength [1.3904 (17) Å] is close to the value reported in the literature (Zhong et al., 2010). The oxadiazine ring and the benzene ring make a dihedral angle of 84.63 (2)°. Weak intermolecular C—H···O hydrogen bonds give a three-dimensional network (Table 1).