In the title compound, C
14H
8N
2O
4, the planar benzoxazinone moiety forms a dihedral angle of 54.54 (8)° with the phenyl ring. The crystal structure is stabilized by weak C—H
O hydrogen bonds and van der Waals interactions.
Supporting information
CCDC reference: 198960
Key indicators
- Single-crystal X-ray study
- T = 293 K
- Mean (C-C) = 0.003 Å
- R factor = 0.038
- wR factor = 0.105
- Data-to-parameter ratio = 11.7
checkCIF results
No syntax errors found
ADDSYM reports no extra symmetry
General Notes
ABSTM_02 When printed, the submitted absorption T values will be replaced
by the scaled T values. Since the ratio of scaled T's is
identical to the ratio of reported T values, the scaling does
not imply a change to the absorption corrections used in the
study.
Ratio of Tmax expected/reported 0.867
Tmax scaled 0.867 Tmin scaled 0.840
The title compound was obtained by the reaction of o-nitrobenzoyl chloride on anthralinic acid in cold (273 K) (Kumar et al., 1997). The precipitate was recrystallized from EtOH/H2O (4:1) as pale yellow crystals.
After checking their presence in a difference map, all the hydrogen atoms were fixed and geometrically were treated as riding on their aromatic parent C atoms, with C—H = 0.93 Å.
Data collection: CAD-4 EXPRESS (Enraf-Nonius, 1994); cell refinement: CAD-4 EXPRESS; data reduction: MolEN (Fair,1990); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: SHELXL97.
2-(2'-Nitrophenyl)-4,5-benz-1,3-oxazin-6-one
top
Crystal data top
C14H8N2O4 | F(000) = 552 |
Mr = 268.22 | Dx = 1.506 Mg m−3 |
Monoclinic, P21/c | Cu Kα radiation, λ = 1.5418 Å |
Hall symbol: -P 2ybc | Cell parameters from 25 reflections |
a = 4.1824 (6) Å | θ = 11.2–35.2° |
b = 22.191 (2) Å | µ = 0.96 mm−1 |
c = 12.767 (1) Å | T = 293 K |
β = 93.26 (1)° | Needles, light yellow |
V = 1183.0 (2) Å3 | 0.36 × 0.24 × 0.15 mm |
Z = 4 | |
Data collection top
Enraf-Nonius CAD-4 diffractometer | 1739 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.014 |
Graphite monochromator | θmax = 67.7°, θmin = 4.0° |
ω–2θ scans | h = 0→5 |
Absorption correction: ψ scan (North et al., 1968) | k = 0→26 |
Tmin = 0.968, Tmax = 0.999 | l = −15→15 |
2438 measured reflections | 3 standard reflections every 60 min |
2130 independent reflections | intensity decay: none |
Refinement top
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)] = 0.038 | H-atom parameters constrained |
wR(F2) = 0.105 | w = 1/[σ2(Fo2) + (0.0456P)2 + 0.4728P] where P = (Fo2 + 2Fc2)/3 |
S = 1.06 | (Δ/σ)max < 0.001 |
2130 reflections | Δρmax = 0.24 e Å−3 |
182 parameters | Δρmin = −0.15 e Å−3 |
0 restraints | Extinction correction: SHELXL97, Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.0048 (6) |
Crystal data top
C14H8N2O4 | V = 1183.0 (2) Å3 |
Mr = 268.22 | Z = 4 |
Monoclinic, P21/c | Cu Kα radiation |
a = 4.1824 (6) Å | µ = 0.96 mm−1 |
b = 22.191 (2) Å | T = 293 K |
c = 12.767 (1) Å | 0.36 × 0.24 × 0.15 mm |
β = 93.26 (1)° | |
Data collection top
Enraf-Nonius CAD-4 diffractometer | 1739 reflections with I > 2σ(I) |
Absorption correction: ψ scan (North et al., 1968) | Rint = 0.014 |
Tmin = 0.968, Tmax = 0.999 | 3 standard reflections every 60 min |
2438 measured reflections | intensity decay: none |
2130 independent reflections | |
Refinement top
R[F2 > 2σ(F2)] = 0.038 | 0 restraints |
wR(F2) = 0.105 | H-atom parameters constrained |
S = 1.06 | Δρmax = 0.24 e Å−3 |
2130 reflections | Δρmin = −0.15 e Å−3 |
182 parameters | |
Special details top
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. |
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top | x | y | z | Uiso*/Ueq | |
C1 | 0.3229 (5) | −0.01215 (9) | 0.13071 (15) | 0.0488 (5) | |
H1 | 0.2493 | −0.0088 | 0.0608 | 0.063* | |
C2 | 0.5058 (6) | −0.06047 (9) | 0.16334 (17) | 0.0550 (5) | |
H2 | 0.5558 | −0.0902 | 0.1156 | 0.069* | |
C3 | 0.6167 (5) | −0.06517 (8) | 0.26742 (17) | 0.0525 (5) | |
H3 | 0.7425 | −0.0980 | 0.2887 | 0.068* | |
C4 | 0.5443 (5) | −0.02231 (8) | 0.33934 (15) | 0.0454 (4) | |
H4 | 0.6196 | −0.0262 | 0.4090 | 0.054* | |
C5 | 0.3573 (4) | 0.02718 (7) | 0.30789 (13) | 0.0369 (4) | |
C6 | 0.2473 (4) | 0.03215 (7) | 0.20292 (13) | 0.0379 (4) | |
C7 | 0.0492 (5) | 0.08343 (8) | 0.17082 (13) | 0.0425 (4) | |
C8 | 0.1188 (4) | 0.11534 (7) | 0.35014 (13) | 0.0361 (4) | |
C9 | 0.0280 (4) | 0.16375 (7) | 0.42316 (13) | 0.0364 (4) | |
C10 | −0.1239 (5) | 0.14748 (9) | 0.51246 (14) | 0.0468 (5) | |
H10 | −0.1578 | 0.1069 | 0.5265 | 0.056* | |
C11 | −0.2260 (5) | 0.19071 (10) | 0.58126 (16) | 0.0553 (5) | |
H11 | −0.3282 | 0.1789 | 0.6408 | 0.065* | |
C12 | −0.1777 (5) | 0.25082 (10) | 0.56230 (16) | 0.0553 (5) | |
H12 | −0.2487 | 0.2796 | 0.6086 | 0.064* | |
C13 | −0.0248 (5) | 0.26852 (8) | 0.47518 (15) | 0.0474 (5) | |
H13 | 0.0099 | 0.3092 | 0.4622 | 0.065* | |
C14 | 0.0768 (4) | 0.22512 (8) | 0.40701 (13) | 0.0383 (4) | |
N1 | 0.2876 (4) | 0.07100 (6) | 0.38216 (11) | 0.0390 (4) | |
N2 | 0.2595 (4) | 0.24605 (7) | 0.31904 (12) | 0.0469 (4) | |
O1 | −0.0650 (4) | 0.09470 (7) | 0.08535 (10) | 0.0645 (5) | |
O2 | −0.0164 (3) | 0.12322 (5) | 0.25113 (9) | 0.0440 (3) | |
O3 | 0.4312 (4) | 0.21035 (7) | 0.27731 (11) | 0.0570 (4) | |
O4 | 0.2345 (6) | 0.29876 (7) | 0.29373 (14) | 0.0860 (6) | |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
C1 | 0.0628 (13) | 0.0459 (11) | 0.0380 (10) | −0.0012 (9) | 0.0051 (9) | −0.0068 (8) |
C2 | 0.0688 (14) | 0.0393 (10) | 0.0577 (12) | 0.0042 (9) | 0.0120 (10) | −0.0132 (9) |
C3 | 0.0607 (13) | 0.0354 (10) | 0.0618 (12) | 0.0068 (9) | 0.0058 (10) | −0.0006 (9) |
C4 | 0.0556 (12) | 0.0363 (9) | 0.0439 (10) | −0.0002 (8) | 0.0000 (8) | 0.0037 (8) |
C5 | 0.0429 (10) | 0.0309 (8) | 0.0369 (9) | −0.0056 (7) | 0.0038 (7) | −0.0021 (7) |
C6 | 0.0455 (10) | 0.0325 (8) | 0.0359 (9) | −0.0044 (7) | 0.0052 (7) | −0.0012 (7) |
C7 | 0.0573 (12) | 0.0370 (9) | 0.0329 (9) | −0.0019 (8) | 0.0011 (8) | −0.0027 (7) |
C8 | 0.0455 (10) | 0.0312 (8) | 0.0315 (8) | −0.0064 (7) | 0.0001 (7) | 0.0011 (7) |
C9 | 0.0397 (10) | 0.0358 (9) | 0.0335 (8) | −0.0009 (7) | −0.0003 (7) | −0.0032 (7) |
C10 | 0.0542 (12) | 0.0444 (10) | 0.0419 (10) | −0.0074 (9) | 0.0045 (8) | 0.0007 (8) |
C11 | 0.0569 (12) | 0.0687 (14) | 0.0418 (10) | −0.0086 (10) | 0.0148 (9) | −0.0085 (9) |
C12 | 0.0584 (13) | 0.0575 (12) | 0.0509 (11) | 0.0016 (10) | 0.0101 (9) | −0.0200 (9) |
C13 | 0.0560 (12) | 0.0371 (10) | 0.0489 (11) | 0.0010 (8) | 0.0023 (9) | −0.0110 (8) |
C14 | 0.0421 (10) | 0.0379 (9) | 0.0349 (9) | −0.0009 (7) | 0.0022 (7) | −0.0026 (7) |
N1 | 0.0508 (9) | 0.0321 (7) | 0.0339 (7) | −0.0008 (6) | 0.0005 (6) | −0.0004 (6) |
N2 | 0.0602 (10) | 0.0383 (8) | 0.0420 (8) | −0.0057 (7) | 0.0023 (7) | 0.0011 (7) |
O1 | 0.0994 (12) | 0.0560 (9) | 0.0362 (7) | 0.0131 (8) | −0.0125 (7) | −0.0019 (6) |
O2 | 0.0592 (8) | 0.0386 (7) | 0.0335 (6) | 0.0087 (6) | −0.0047 (5) | −0.0040 (5) |
O3 | 0.0596 (9) | 0.0585 (9) | 0.0548 (8) | 0.0009 (7) | 0.0200 (7) | −0.0002 (7) |
O4 | 0.1446 (18) | 0.0398 (9) | 0.0768 (12) | −0.0022 (9) | 0.0351 (12) | 0.0139 (7) |
Geometric parameters (Å, º) top
C1—C2 | 1.368 (3) | C8—O2 | 1.366 (2) |
C1—C6 | 1.396 (2) | C8—C9 | 1.486 (2) |
C1—H1 | 0.93 | C9—C10 | 1.384 (2) |
C2—C3 | 1.386 (3) | C9—C14 | 1.394 (2) |
C2—H2 | 0.93 | C10—C11 | 1.385 (3) |
C3—C4 | 1.368 (3) | C10—H10 | 0.93 |
C3—H3 | 0.93 | C11—C12 | 1.373 (3) |
C4—C5 | 1.394 (2) | C11—H11 | 0.93 |
C4—H4 | 0.93 | C12—C13 | 1.371 (3) |
C5—C6 | 1.396 (2) | C12—H12 | 0.93 |
C5—N1 | 1.401 (2) | C13—C14 | 1.381 (2) |
C6—C7 | 1.453 (3) | C13—H13 | 0.93 |
C7—O1 | 1.193 (2) | C14—N2 | 1.469 (2) |
C7—O2 | 1.392 (2) | N2—O3 | 1.213 (2) |
C8—N1 | 1.265 (2) | N2—O4 | 1.216 (2) |
| | | |
N1···C10i | 3.353 (3) | O3···C9i | 3.200 (3) |
O2···O3ii | 3.045 (3) | O3···C14i | 3.103 (3) |
O2···C5ii | 3.485 (3) | O4···C11iii | 3.245 (3) |
| | | |
C2—C1—C6 | 119.63 (18) | C10—C9—C14 | 117.03 (16) |
C2—C1—H1 | 120.2 | C10—C9—C8 | 118.28 (15) |
C6—C1—H1 | 120.2 | C14—C9—C8 | 124.66 (15) |
C1—C2—C3 | 120.10 (18) | C9—C10—C11 | 120.95 (18) |
C1—C2—H2 | 119.9 | C9—C10—H10 | 119.5 |
C3—C2—H2 | 119.9 | C11—C10—H10 | 119.5 |
C4—C3—C2 | 121.09 (18) | C12—C11—C10 | 120.51 (18) |
C4—C3—H3 | 119.5 | C12—C11—H11 | 119.7 |
C2—C3—H3 | 119.5 | C10—C11—H11 | 119.7 |
C3—C4—C5 | 119.77 (18) | C13—C12—C11 | 120.09 (18) |
C3—C4—H4 | 120.1 | C13—C12—H12 | 120.0 |
C5—C4—H4 | 120.1 | C11—C12—H12 | 120.0 |
C4—C5—C6 | 119.18 (16) | C12—C13—C14 | 119.06 (18) |
C4—C5—N1 | 119.14 (16) | C12—C13—H13 | 120.5 |
C6—C5—N1 | 121.67 (15) | C14—C13—H13 | 120.5 |
C5—C6—C1 | 120.22 (17) | C13—C14—C9 | 122.35 (17) |
C5—C6—C7 | 118.96 (15) | C13—C14—N2 | 116.96 (16) |
C1—C6—C7 | 120.81 (16) | C9—C14—N2 | 120.58 (15) |
O1—C7—O2 | 117.08 (17) | C8—N1—C5 | 117.07 (14) |
O1—C7—C6 | 127.93 (17) | O3—N2—O4 | 123.76 (17) |
O2—C7—C6 | 114.98 (14) | O3—N2—C14 | 118.43 (15) |
N1—C8—O2 | 126.33 (15) | O4—N2—C14 | 117.79 (17) |
N1—C8—C9 | 121.15 (15) | C8—O2—C7 | 120.76 (14) |
O2—C8—C9 | 112.39 (14) | | |
| | | |
C6—C1—C2—C3 | −0.4 (3) | C9—C10—C11—C12 | −0.2 (3) |
C1—C2—C3—C4 | 0.6 (3) | C10—C11—C12—C13 | −0.6 (3) |
C2—C3—C4—C5 | −0.3 (3) | C11—C12—C13—C14 | 0.5 (3) |
C3—C4—C5—C6 | −0.1 (3) | C12—C13—C14—C9 | 0.4 (3) |
C3—C4—C5—N1 | −179.40 (17) | C12—C13—C14—N2 | −175.73 (18) |
C4—C5—C6—C1 | 0.3 (3) | C10—C9—C14—C13 | −1.1 (3) |
N1—C5—C6—C1 | 179.57 (16) | C8—C9—C14—C13 | 177.09 (17) |
C4—C5—C6—C7 | 179.26 (17) | C10—C9—C14—N2 | 174.90 (16) |
N1—C5—C6—C7 | −1.5 (3) | C8—C9—C14—N2 | −6.9 (3) |
C2—C1—C6—C5 | −0.1 (3) | O2—C8—N1—C5 | 3.6 (3) |
C2—C1—C6—C7 | −179.00 (18) | C9—C8—N1—C5 | 179.14 (15) |
C5—C6—C7—O1 | −179.8 (2) | C4—C5—N1—C8 | 179.57 (16) |
C1—C6—C7—O1 | −0.9 (3) | C6—C5—N1—C8 | 0.3 (2) |
C5—C6—C7—O2 | −0.9 (2) | C13—C14—N2—O3 | 158.17 (18) |
C1—C6—C7—O2 | 178.02 (16) | C9—C14—N2—O3 | −18.0 (3) |
N1—C8—C9—C10 | −54.3 (2) | C13—C14—N2—O4 | −20.3 (3) |
O2—C8—C9—C10 | 121.85 (18) | C9—C14—N2—O4 | 163.51 (19) |
N1—C8—C9—C14 | 127.61 (19) | N1—C8—O2—C7 | −6.3 (3) |
O2—C8—C9—C14 | −56.3 (2) | C9—C8—O2—C7 | 177.87 (15) |
C14—C9—C10—C11 | 0.9 (3) | O1—C7—O2—C8 | −176.52 (17) |
C8—C9—C10—C11 | −177.32 (18) | C6—C7—O2—C8 | 4.4 (2) |
Symmetry codes: (i) x+1, y, z; (ii) x−1, y, z; (iii) x, −y+1/2, z−1/2. |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
C1—H1···O1iv | 0.93 | 2.75 | 3.434 (2) | 131 |
C12—H12···O1v | 0.93 | 2.91 | 3.470 (3) | 120 |
C13—H13···O1v | 0.93 | 2.68 | 3.353 (2) | 130 |
C12—H12···O3vi | 0.93 | 2.61 | 3.386 (2) | 141 |
C11—H11···O4vi | 0.93 | 2.79 | 3.633 (3) | 151 |
C2—H2···O4vii | 0.93 | 2.84 | 3.342 (3) | 115 |
C3—H3···O4vii | 0.93 | 2.53 | 3.189 (2) | 129 |
Symmetry codes: (iv) −x, −y, −z; (v) x, −y+1/2, z+1/2; (vi) x−1, −y+1/2, z+1/2; (vii) −x+1, y−1/2, −z+1/2. |
Experimental details
Crystal data |
Chemical formula | C14H8N2O4 |
Mr | 268.22 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 293 |
a, b, c (Å) | 4.1824 (6), 22.191 (2), 12.767 (1) |
β (°) | 93.26 (1) |
V (Å3) | 1183.0 (2) |
Z | 4 |
Radiation type | Cu Kα |
µ (mm−1) | 0.96 |
Crystal size (mm) | 0.36 × 0.24 × 0.15 |
|
Data collection |
Diffractometer | Enraf-Nonius CAD-4 diffractometer |
Absorption correction | ψ scan (North et al., 1968) |
Tmin, Tmax | 0.968, 0.999 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 2438, 2130, 1739 |
Rint | 0.014 |
(sin θ/λ)max (Å−1) | 0.600 |
|
Refinement |
R[F2 > 2σ(F2)], wR(F2), S | 0.038, 0.105, 1.06 |
No. of reflections | 2130 |
No. of parameters | 182 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.24, −0.15 |
Selected geometric parameters (Å, º) topC5—N1 | 1.401 (2) | C8—O2 | 1.366 (2) |
C7—O1 | 1.193 (2) | C14—N2 | 1.469 (2) |
C7—O2 | 1.392 (2) | N2—O3 | 1.213 (2) |
C8—N1 | 1.265 (2) | N2—O4 | 1.216 (2) |
| | | |
N1···C10i | 3.353 (3) | O3···C9i | 3.200 (3) |
O2···O3ii | 3.045 (3) | O3···C14i | 3.103 (3) |
O2···C5ii | 3.485 (3) | O4···C11iii | 3.245 (3) |
| | | |
O1—C7—O2 | 117.08 (17) | O2—C8—C9 | 112.39 (14) |
O1—C7—C6 | 127.93 (17) | O3—N2—O4 | 123.76 (17) |
N1—C8—O2 | 126.33 (15) | O3—N2—C14 | 118.43 (15) |
| | | |
N1—C8—C9—C10 | −54.3 (2) | C13—C14—N2—O3 | 158.17 (18) |
O2—C8—C9—C10 | 121.85 (18) | C9—C14—N2—O3 | −18.0 (3) |
N1—C8—C9—C14 | 127.61 (19) | C13—C14—N2—O4 | −20.3 (3) |
O2—C8—C9—C14 | −56.3 (2) | C9—C14—N2—O4 | 163.51 (19) |
Symmetry codes: (i) x+1, y, z; (ii) x−1, y, z; (iii) x, −y+1/2, z−1/2. |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
C1—H1···O1iv | 0.93 | 2.75 | 3.434 (2) | 131.4 |
C12—H12···O1v | 0.93 | 2.91 | 3.470 (3) | 119.8 |
C13—H13···O1v | 0.93 | 2.68 | 3.353 (2) | 130.0 |
C12—H12···O3vi | 0.93 | 2.61 | 3.386 (2) | 141.3 |
C11—H11···O4vi | 0.93 | 2.79 | 3.633 (3) | 150.5 |
C2—H2···O4vii | 0.93 | 2.84 | 3.342 (3) | 115.1 |
C3—H3···O4vii | 0.93 | 2.53 | 3.189 (2) | 128.6 |
Symmetry codes: (iv) −x, −y, −z; (v) x, −y+1/2, z+1/2; (vi) x−1, −y+1/2, z+1/2; (vii) −x+1, y−1/2, −z+1/2. |
The preparation of several new 2-phenyl substituted phenyl benzoxinones and evaluation of their biological activity against some pathogenic fungi and bacteria have been reported (Kumar et al., 1997). A project has been undertaken by us to study the crystal structures of some of these benzoxinones to establish their stereochemistry. The present paper reports the structure of the title compound, C14H8N2O4 (I), a benzoxinone derivative.
A displacement ellipsoid plot of the title molecule is shown in Fig. 1. The benzoxinone moiety is essentially planar, with O2 deviating a maximum of 0.037 (1) Å and it forms a dihedral angle of 54.54 (8)° with the phenyl ring. The nitro group is twisted out of the phenyl ring plane by 19.63 (11)°. Although there is no —NH or —OH group available in the structure to form strong hydrogen bonds, the C atoms are involved in the formation of weak C—H···O hydrogen bonds with the oxygen atoms O3 and O4 of the nitro group (Table 2 and Fig. 2). Some other short intermolecular contacts are listed in Table 3.