organic compounds
(2,7-Dimethoxynaphthalen-1-yl)(3-nitrophenyl)methanone
aDepartment of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture & Technology, 2-24-16 Naka-machi, Koganei, Tokyo 184-8588, Japan
*Correspondence e-mail: yonezawa@cc.tuat.ac.jp
The title compound, C19H15NO5, has an intramolecular C—H⋯O=C hydrogen bond between a naphthalene H atom and the O atom of the carbonyl group. The interplanar angle between the naphthalene ring system and the benzene ring is 69.59 (5)°. The dihedral angle between the bridging carbonyl C—C(=O)—C plane and the naphthalene ring system is 61.02 (6)°, which is far larger than that between the bridging carbonyl plane and the benzene ring [12.68 (7)°]. The nitro group is slightly out of the plane of the benzene ring [O—N—C—C torsion angle = 4.97 (17)°]. In the crystal, the packing is mainly stabilized by C—H⋯O interactions between an H atom of the benzene ring and an O atom of the nitro group.
Related literature
For the electrophilic aromatic aroylation of 2,7-dimethoxynaphthalene giving aroylated naphthalene compounds, see: Okamoto & Yonezawa (2009). For the structures of closely related compounds, see: Kato et al. (2010); Mitsui et al. (2008); Muto et al. (2010); Nishijima et al. (2010); Watanabe et al. (2010).
Experimental
Crystal data
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Refinement
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Data collection: PROCESS-AUTO (Rigaku, 1998); cell PROCESS-AUTO; data reduction: CrystalStructure (Rigaku/MSC, 2004); program(s) used to solve structure: SIR2004 (Burla et al., 2005); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEPIII (Burnett & Johnson, 1996); software used to prepare material for publication: SHELXL97.
Supporting information
https://doi.org/10.1107/S1600536810042819/rn2073sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810042819/rn2073Isup2.hkl
To 50 ml flask, 3-nitrobenzoyl chloride (8.8 mmol, 1.63 g), aluminium chloride (9.7 mmol, 1.29 g) and methylene chloride (10 ml) were placed and stirred at 273 K. To the reaction mixture thus obtained, 2,7-dimethoxynaphthalene (4 mmol, 0.75 g) in methylene chloride (10 ml) were added. After the reaction mixture was stirred at 273 K for 24 h, it was poured into ice-cold water (10 ml). The aqueous layer was extracted with CHCl3 (10 ml × 3). The combined extracts were washed with 2 M aqueous NaOH followed by washing with brine. The organic layers thus obtained were dried over anhydrous MgSO4. The solvent was removed under reduced pressure to give a cake. The crude product was purified by silica gel
(CHCl3). Yellow platelet single crystals suitable for X-ray diffraction were obtained by crystallization from hexane and chloroform (45% yield).Spectroscopic Data: 1H NMR (300 MHz, CDCl3) δ 3.77 [3.766](3H, s), 3.77 [3.772] (3H, s), 6.87 (1H, d, J = 2 Hz), 7.06 (1H, dd, J = 2, 9 Hz), 7.20 (1H, d, J = 9 Hz), 7.64 (1H, t, J = 8 Hz), 7.76 (1H, d, J = 9 Hz), 7.94 (1H, d, J = 9 Hz), 8.17 (1H, ddd, J = 1, 2, 8 Hz), 7.92 (1H, ddd, J = 1, 2, 8 Hz), 8.65 (1H, dd, J = 1, 2 Hz) p.p.m..
13C NMR (75 MHz, CDCl3) δ 55.2, 56.1, 101.7, 109.8, 117.3, 119.7, 124.1, 124.5, 127.4, 129.6, 130.0, 132.3, 133.0, 134.9, 139.7, 148.5, 155.6, 159.3, 195.7 p.p.m..
IR (KBr): 1670, 1624, 1513, 1253 cm-1.
Anal. Calcd for C19H15NO5: C, 67.65%; H, 4.48%; Found: C, 67.79%; H, 4.58%.
All the H-atoms could be located in difference Fourier maps. The H atoms attached to carbon were introduced in calculated positions and treated as riding on their parent atoms with C—H = 0.98 Å (methyl) or 0.95 Å (aromatic) with Uiso(H) = 1.2Ueq(Caromatic) or Uiso(H) = 1.5Ueq(Cmethyl).
In the course of our study on electrophilic aromatic aroylation of 2,7-dimethoxynaphthalene, peri-aroylnaphthalene compounds have been found to be formed regioselectively with the aid of suitable acidic mediators (Okamoto & Yonezawa, 2009). We have reported the X-ray crystal structures of 1,8-diaroylated 2,7-dimethoxynaphthalenes such as 1,8-bis(4-methylbenzoyl)-2,7-dimethoxynaphthalene (Muto et al., 2010) and 1,8-bis(4-aminobenzoyl)-2,7-dimethoxynaphthalene (Nishijima et al., 2010). In these compounds, the aroyl groups are oriented in opposite directions. The benzene rings of the aroyl groups are largely out of the plane of the naphthalene ring. Moreover, the ketone carbonyl vectors are out of the planes of the benzene rings and also out of the plane of the naphthalene ring at the same time. The aromatic rings in this type of molecule are assembled with non-coplanar configuration resulting in partial disruption of π-conjugated ring systems. Furthermore, the crystal structures of 1-monoaroylated naphthalene compounds, i. e., 1-(4-chlorobenzoyl)-2,7-dimethoxynaphthalene (Mitsui et al., 2008) and (2,7-dimethoxynaphthalen-1-yl)(phenyl)methanone (Kato et al., 2010), also exhibit essentially the same non-coplanar conformation as the 1,8-diaroylated naphthalene compounds. As a part of our continuous studies on the molecular structures of these kinds of homologous molecules, the X-ray of title compound, (I), 1-monoaroylnaphthalene with a nitro substituent, is discussed in this article.
An ORTEPIII (Burnett & Johnson, 1996) plot of title compound is displayed in Fig. 1. The interplanar angle between the benzene ring (C12–C17) and the naphthalene ring (C1–C10) is 69.59 (5)°. The bridging carbonyl plane [C1—C11(═O1)—C12] makes dihedral angles with the naphthalene ring system and the benzene ring, viz., 61.02 (6)° [C10—C1—C11—O1 torsion angle = -59.97 (15)°] and 12.68 (7)° [O1—C1—C12—C13 torsion angle = -12.50 (17)°]. The interplanar angle and the dihedral angles are slightly larger than those of 1-(4-nitrobenzoyl)-2,7-dimethoxynaphthalene [Watanabe et al., 2010; interplanar angle = 61.97 (5)°, dihedral angles = 54.68 (6) and 12.54 (7)°]. On the other hand, both 1-monoaroylnaphthalene analogues with a nitro group have a relatively small dihedral angle between the benzene ring and naphthalene ring system compared to other 1-monoaroylnaphthalene homologues. This difference is presumably caused by the intramolecular C—H···O═C interaction, which forms a six-membered ring including the carbonyl group and a naphthalene hydrogen atom (Fig. 1 and Table 1). Besides, the nitro group is slightly out of the plane of the benzene ring [O5—N1—C14—C13 torsion angle = 4.97 (17)°].
In the crystal, the molecular packing is stabilized by C—H···O interactions between a hydrogen atom on the benzene ring and a nitro oxygen atom (C17—H17···O5 = 2.37 Å; Fig. 2 and Table 1). Furthermore, the carbonyl group and the naphthalene ring are connected with a weak C—H···O interaction (C4—H4···O1 = 2.60 Å).
For formation reactions of aroylated naphthalene compounds via electrophilic aromatic aroylation of 2,7-dimethoxynaphthalene, see: Okamoto & Yonezawa (2009). For the structures of closely related compounds, see: Kato et al. (2010); Mitsui et al. (2008); Muto et al. (2010); Nishijima et al. (2010); Watanabe et al. (2010).
Data collection: PROCESS-AUTO (Rigaku, 1998); cell
PROCESS-AUTO (Rigaku, 1998); data reduction: CrystalStructure (Rigaku/MSC, 2004); program(s) used to solve structure: SIR2004 (Burla et al., 2005); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEPIII (Burnett & Johnson, 1996); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).C19H15NO5 | F(000) = 704 |
Mr = 337.32 | Dx = 1.390 Mg m−3 |
Monoclinic, P21/n | Melting point = 418.8–419.1 K |
Hall symbol: -P 2yn | Cu Kα radiation, λ = 1.54187 Å |
a = 8.05658 (18) Å | Cell parameters from 23523 reflections |
b = 17.0634 (4) Å | θ = 3.8–68.2° |
c = 11.7660 (3) Å | µ = 0.85 mm−1 |
β = 94.660 (1)° | T = 193 K |
V = 1612.15 (6) Å3 | Block, yellow |
Z = 4 | 0.55 × 0.20 × 0.20 mm |
Rigaku R-AXIS RAPID diffractometer | 2942 independent reflections |
Radiation source: rotating anode | 2685 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.022 |
Detector resolution: 10.00 pixels mm-1 | θmax = 68.2°, θmin = 4.6° |
ω scans | h = −9→9 |
Absorption correction: numerical (NUMABS; Higashi, 1999) | k = −20→20 |
Tmin = 0.653, Tmax = 0.849 | l = −14→14 |
29060 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)] = 0.033 | H-atom parameters constrained |
wR(F2) = 0.090 | w = 1/[σ2(Fo2) + (0.0474P)2 + 0.4684P] where P = (Fo2 + 2Fc2)/3 |
S = 1.00 | (Δ/σ)max < 0.001 |
2942 reflections | Δρmax = 0.19 e Å−3 |
229 parameters | Δρmin = −0.14 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: 0.0073 (4) |
C19H15NO5 | V = 1612.15 (6) Å3 |
Mr = 337.32 | Z = 4 |
Monoclinic, P21/n | Cu Kα radiation |
a = 8.05658 (18) Å | µ = 0.85 mm−1 |
b = 17.0634 (4) Å | T = 193 K |
c = 11.7660 (3) Å | 0.55 × 0.20 × 0.20 mm |
β = 94.660 (1)° |
Rigaku R-AXIS RAPID diffractometer | 2942 independent reflections |
Absorption correction: numerical (NUMABS; Higashi, 1999) | 2685 reflections with I > 2σ(I) |
Tmin = 0.653, Tmax = 0.849 | Rint = 0.022 |
29060 measured reflections |
R[F2 > 2σ(F2)] = 0.033 | 0 restraints |
wR(F2) = 0.090 | H-atom parameters constrained |
S = 1.00 | Δρmax = 0.19 e Å−3 |
2942 reflections | Δρmin = −0.14 e Å−3 |
229 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 | ||
O1 | 0.27637 (10) | 0.43017 (5) | 0.69042 (8) | 0.0421 (2) | |
O2 | 0.00689 (11) | 0.59531 (5) | 0.62855 (8) | 0.0451 (3) | |
O3 | −0.04611 (11) | 0.18744 (5) | 0.79381 (8) | 0.0432 (2) | |
O4 | 0.64787 (14) | 0.65633 (7) | 1.04665 (10) | 0.0638 (3) | |
O5 | 0.71205 (11) | 0.57358 (6) | 0.91928 (9) | 0.0526 (3) | |
N1 | 0.61035 (14) | 0.60860 (6) | 0.97139 (10) | 0.0416 (3) | |
C1 | −0.00844 (14) | 0.46560 (7) | 0.68859 (9) | 0.0309 (3) | |
C2 | −0.08844 (15) | 0.52991 (7) | 0.63812 (10) | 0.0343 (3) | |
C3 | −0.25834 (16) | 0.52651 (8) | 0.59896 (10) | 0.0377 (3) | |
H3 | −0.3127 | 0.5713 | 0.5655 | 0.045* | |
C4 | −0.34356 (15) | 0.45847 (8) | 0.60951 (10) | 0.0371 (3) | |
H4 | −0.4586 | 0.4568 | 0.5843 | 0.044* | |
C5 | −0.26677 (14) | 0.39048 (7) | 0.65650 (9) | 0.0328 (3) | |
C6 | −0.35374 (15) | 0.31846 (8) | 0.66192 (10) | 0.0372 (3) | |
H6 | −0.4679 | 0.3161 | 0.6347 | 0.045* | |
C7 | −0.27714 (16) | 0.25281 (8) | 0.70512 (10) | 0.0386 (3) | |
H7 | −0.3364 | 0.2047 | 0.7061 | 0.046* | |
C8 | −0.10780 (15) | 0.25655 (7) | 0.74891 (10) | 0.0342 (3) | |
C9 | −0.01892 (14) | 0.32474 (7) | 0.74566 (9) | 0.0318 (3) | |
H9 | 0.0942 | 0.3262 | 0.7755 | 0.038* | |
C10 | −0.09579 (14) | 0.39342 (7) | 0.69773 (9) | 0.0298 (3) | |
C11 | 0.17233 (14) | 0.47124 (7) | 0.73012 (9) | 0.0307 (3) | |
C12 | 0.22134 (14) | 0.52681 (7) | 0.82550 (9) | 0.0298 (3) | |
C13 | 0.38964 (14) | 0.54220 (7) | 0.85296 (10) | 0.0311 (3) | |
H13 | 0.4725 | 0.5190 | 0.8108 | 0.037* | |
C14 | 0.43276 (15) | 0.59185 (7) | 0.94285 (10) | 0.0341 (3) | |
C15 | 0.31664 (17) | 0.62608 (8) | 1.00789 (11) | 0.0425 (3) | |
H15 | 0.3505 | 0.6597 | 1.0699 | 0.051* | |
C16 | 0.15028 (17) | 0.61002 (8) | 0.98007 (11) | 0.0444 (3) | |
H16 | 0.0681 | 0.6327 | 1.0234 | 0.053* | |
C17 | 0.10273 (15) | 0.56103 (8) | 0.88928 (10) | 0.0368 (3) | |
H17 | −0.0121 | 0.5507 | 0.8704 | 0.044* | |
C18 | −0.05995 (17) | 0.65802 (8) | 0.55877 (11) | 0.0412 (3) | |
H18A | 0.0266 | 0.6975 | 0.5507 | 0.049* | |
H18B | −0.1535 | 0.6819 | 0.5943 | 0.049* | |
H18C | −0.0988 | 0.6377 | 0.4834 | 0.049* | |
C19 | 0.12202 (18) | 0.18734 (8) | 0.84244 (12) | 0.0461 (3) | |
H19A | 0.1498 | 0.1354 | 0.8740 | 0.055* | |
H19B | 0.1349 | 0.2266 | 0.9033 | 0.055* | |
H19C | 0.1968 | 0.2000 | 0.7834 | 0.055* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0304 (5) | 0.0488 (5) | 0.0476 (5) | 0.0002 (4) | 0.0063 (4) | −0.0138 (4) |
O2 | 0.0411 (5) | 0.0371 (5) | 0.0550 (6) | −0.0072 (4) | −0.0099 (4) | 0.0087 (4) |
O3 | 0.0441 (5) | 0.0346 (5) | 0.0504 (5) | −0.0017 (4) | −0.0003 (4) | 0.0029 (4) |
O4 | 0.0542 (7) | 0.0562 (6) | 0.0767 (7) | −0.0120 (5) | −0.0224 (6) | −0.0144 (6) |
O5 | 0.0293 (5) | 0.0639 (7) | 0.0639 (6) | −0.0023 (4) | −0.0007 (4) | 0.0040 (5) |
N1 | 0.0356 (6) | 0.0387 (6) | 0.0484 (6) | −0.0068 (5) | −0.0087 (5) | 0.0058 (5) |
C1 | 0.0280 (6) | 0.0360 (6) | 0.0287 (5) | −0.0012 (5) | 0.0016 (4) | −0.0036 (5) |
C2 | 0.0340 (6) | 0.0349 (6) | 0.0338 (6) | −0.0023 (5) | 0.0002 (5) | −0.0021 (5) |
C3 | 0.0346 (7) | 0.0406 (7) | 0.0370 (6) | 0.0039 (5) | −0.0038 (5) | 0.0010 (5) |
C4 | 0.0272 (6) | 0.0481 (7) | 0.0351 (6) | 0.0002 (5) | −0.0023 (5) | −0.0016 (5) |
C5 | 0.0288 (6) | 0.0421 (7) | 0.0275 (6) | −0.0024 (5) | 0.0024 (4) | −0.0034 (5) |
C6 | 0.0287 (6) | 0.0476 (7) | 0.0350 (6) | −0.0078 (5) | 0.0004 (5) | −0.0025 (5) |
C7 | 0.0391 (7) | 0.0401 (7) | 0.0369 (6) | −0.0109 (5) | 0.0048 (5) | −0.0031 (5) |
C8 | 0.0378 (6) | 0.0348 (6) | 0.0302 (6) | −0.0010 (5) | 0.0049 (5) | −0.0021 (5) |
C9 | 0.0277 (6) | 0.0387 (6) | 0.0289 (5) | 0.0000 (5) | 0.0019 (4) | −0.0030 (5) |
C10 | 0.0280 (6) | 0.0365 (6) | 0.0252 (5) | −0.0016 (5) | 0.0033 (4) | −0.0039 (4) |
C11 | 0.0280 (6) | 0.0334 (6) | 0.0310 (6) | −0.0014 (5) | 0.0042 (5) | 0.0014 (5) |
C12 | 0.0271 (6) | 0.0324 (6) | 0.0300 (6) | −0.0009 (4) | 0.0018 (4) | 0.0017 (4) |
C13 | 0.0283 (6) | 0.0324 (6) | 0.0326 (6) | 0.0014 (5) | 0.0029 (5) | 0.0033 (5) |
C14 | 0.0305 (6) | 0.0338 (6) | 0.0368 (6) | −0.0036 (5) | −0.0042 (5) | 0.0042 (5) |
C15 | 0.0461 (8) | 0.0417 (7) | 0.0386 (7) | −0.0012 (6) | −0.0023 (6) | −0.0089 (5) |
C16 | 0.0395 (7) | 0.0521 (8) | 0.0422 (7) | 0.0048 (6) | 0.0075 (6) | −0.0115 (6) |
C17 | 0.0273 (6) | 0.0455 (7) | 0.0377 (6) | 0.0006 (5) | 0.0030 (5) | −0.0034 (5) |
C18 | 0.0481 (8) | 0.0356 (6) | 0.0396 (7) | 0.0013 (6) | 0.0021 (6) | 0.0020 (5) |
C19 | 0.0496 (8) | 0.0389 (7) | 0.0482 (8) | 0.0051 (6) | −0.0053 (6) | 0.0003 (6) |
O1—C11 | 1.2147 (14) | C7—H7 | 0.9500 |
O2—C2 | 1.3646 (15) | C8—C9 | 1.3685 (17) |
O2—C18 | 1.4273 (15) | C9—C10 | 1.4206 (17) |
O3—C8 | 1.3689 (15) | C9—H9 | 0.9500 |
O3—C19 | 1.4270 (16) | C11—C12 | 1.4974 (16) |
O4—N1 | 1.2229 (15) | C12—C17 | 1.3906 (16) |
O5—N1 | 1.2189 (15) | C12—C13 | 1.3931 (16) |
N1—C14 | 1.4709 (16) | C13—C14 | 1.3774 (17) |
C1—C2 | 1.3821 (17) | C13—H13 | 0.9500 |
C1—C10 | 1.4269 (16) | C14—C15 | 1.3851 (18) |
C1—C11 | 1.5012 (16) | C15—C16 | 1.3810 (19) |
C2—C3 | 1.4096 (17) | C15—H15 | 0.9500 |
C3—C4 | 1.3596 (18) | C16—C17 | 1.3858 (18) |
C3—H3 | 0.9500 | C16—H16 | 0.9500 |
C4—C5 | 1.4067 (18) | C17—H17 | 0.9500 |
C4—H4 | 0.9500 | C18—H18A | 0.9800 |
C5—C6 | 1.4187 (17) | C18—H18B | 0.9800 |
C5—C10 | 1.4236 (16) | C18—H18C | 0.9800 |
C6—C7 | 1.3576 (18) | C19—H19A | 0.9800 |
C6—H6 | 0.9500 | C19—H19B | 0.9800 |
C7—C8 | 1.4201 (18) | C19—H19C | 0.9800 |
C2—O2—C18 | 118.16 (10) | C5—C10—C1 | 118.31 (11) |
C8—O3—C19 | 117.31 (10) | O1—C11—C12 | 120.36 (10) |
O5—N1—O4 | 123.64 (11) | O1—C11—C1 | 121.29 (10) |
O5—N1—C14 | 118.11 (11) | C12—C11—C1 | 118.31 (10) |
O4—N1—C14 | 118.25 (12) | C17—C12—C13 | 119.62 (11) |
C2—C1—C10 | 120.14 (11) | C17—C12—C11 | 121.29 (10) |
C2—C1—C11 | 119.68 (10) | C13—C12—C11 | 119.05 (10) |
C10—C1—C11 | 120.15 (10) | C14—C13—C12 | 118.30 (11) |
O2—C2—C1 | 116.03 (10) | C14—C13—H13 | 120.9 |
O2—C2—C3 | 123.01 (11) | C12—C13—H13 | 120.9 |
C1—C2—C3 | 120.96 (11) | C13—C14—C15 | 122.96 (11) |
C4—C3—C2 | 119.31 (12) | C13—C14—N1 | 118.34 (11) |
C4—C3—H3 | 120.3 | C15—C14—N1 | 118.69 (11) |
C2—C3—H3 | 120.3 | C16—C15—C14 | 118.13 (11) |
C3—C4—C5 | 122.06 (11) | C16—C15—H15 | 120.9 |
C3—C4—H4 | 119.0 | C14—C15—H15 | 120.9 |
C5—C4—H4 | 119.0 | C15—C16—C17 | 120.31 (12) |
C4—C5—C6 | 121.94 (11) | C15—C16—H16 | 119.8 |
C4—C5—C10 | 119.17 (11) | C17—C16—H16 | 119.8 |
C6—C5—C10 | 118.88 (11) | C16—C17—C12 | 120.68 (11) |
C7—C6—C5 | 121.36 (11) | C16—C17—H17 | 119.7 |
C7—C6—H6 | 119.3 | C12—C17—H17 | 119.7 |
C5—C6—H6 | 119.3 | O2—C18—H18A | 109.5 |
C6—C7—C8 | 119.53 (11) | O2—C18—H18B | 109.5 |
C6—C7—H7 | 120.2 | H18A—C18—H18B | 109.5 |
C8—C7—H7 | 120.2 | O2—C18—H18C | 109.5 |
C9—C8—O3 | 124.67 (11) | H18A—C18—H18C | 109.5 |
C9—C8—C7 | 121.17 (11) | H18B—C18—H18C | 109.5 |
O3—C8—C7 | 114.16 (11) | O3—C19—H19A | 109.5 |
C8—C9—C10 | 120.02 (11) | O3—C19—H19B | 109.5 |
C8—C9—H9 | 120.0 | H19A—C19—H19B | 109.5 |
C10—C9—H9 | 120.0 | O3—C19—H19C | 109.5 |
C9—C10—C5 | 119.00 (11) | H19A—C19—H19C | 109.5 |
C9—C10—C1 | 122.69 (10) | H19B—C19—H19C | 109.5 |
C18—O2—C2—C1 | 168.50 (11) | C2—C1—C10—C9 | 178.10 (11) |
C18—O2—C2—C3 | −11.15 (17) | C11—C1—C10—C9 | 0.20 (16) |
C10—C1—C2—O2 | −177.16 (10) | C2—C1—C10—C5 | −1.63 (16) |
C11—C1—C2—O2 | 0.74 (16) | C11—C1—C10—C5 | −179.53 (10) |
C10—C1—C2—C3 | 2.49 (18) | C2—C1—C11—O1 | −117.94 (13) |
C11—C1—C2—C3 | −179.60 (10) | C10—C1—C11—O1 | 59.96 (15) |
O2—C2—C3—C4 | 178.56 (11) | C2—C1—C11—C12 | 64.42 (14) |
C1—C2—C3—C4 | −1.07 (18) | C10—C1—C11—C12 | −117.67 (12) |
C2—C3—C4—C5 | −1.23 (19) | O1—C11—C12—C17 | −165.28 (11) |
C3—C4—C5—C6 | −176.62 (11) | C1—C11—C12—C17 | 12.37 (16) |
C3—C4—C5—C10 | 2.03 (18) | O1—C11—C12—C13 | 12.50 (17) |
C4—C5—C6—C7 | 178.48 (11) | C1—C11—C12—C13 | −169.84 (10) |
C10—C5—C6—C7 | −0.17 (18) | C17—C12—C13—C14 | −0.50 (17) |
C5—C6—C7—C8 | 1.83 (18) | C11—C12—C13—C14 | −178.32 (10) |
C19—O3—C8—C9 | 1.23 (17) | C12—C13—C14—C15 | 0.96 (18) |
C19—O3—C8—C7 | −178.24 (11) | C12—C13—C14—N1 | −179.56 (10) |
C6—C7—C8—C9 | −1.73 (18) | O5—N1—C14—C13 | −4.97 (17) |
C6—C7—C8—O3 | 177.76 (11) | O4—N1—C14—C13 | 175.63 (11) |
O3—C8—C9—C10 | −179.52 (10) | O5—N1—C14—C15 | 174.53 (12) |
C7—C8—C9—C10 | −0.09 (17) | O4—N1—C14—C15 | −4.87 (17) |
C8—C9—C10—C5 | 1.75 (16) | C13—C14—C15—C16 | −0.7 (2) |
C8—C9—C10—C1 | −177.99 (10) | N1—C14—C15—C16 | 179.87 (12) |
C4—C5—C10—C9 | 179.68 (10) | C14—C15—C16—C17 | −0.1 (2) |
C6—C5—C10—C9 | −1.63 (16) | C15—C16—C17—C12 | 0.5 (2) |
C4—C5—C10—C1 | −0.57 (16) | C13—C12—C17—C16 | −0.24 (19) |
C6—C5—C10—C1 | 178.12 (10) | C11—C12—C17—C16 | 177.54 (12) |
D—H···A | D—H | H···A | D···A | D—H···A |
C4—H4···O1i | 0.95 | 2.60 | 3.3150 (15) | 132 |
C9—H9···O1 | 0.95 | 2.56 | 3.0935 (14) | 116 |
C17—H17···O5i | 0.95 | 2.37 | 3.2028 (15) | 146 |
Symmetry code: (i) x−1, y, z. |
Experimental details
Crystal data | |
Chemical formula | C19H15NO5 |
Mr | 337.32 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 193 |
a, b, c (Å) | 8.05658 (18), 17.0634 (4), 11.7660 (3) |
β (°) | 94.660 (1) |
V (Å3) | 1612.15 (6) |
Z | 4 |
Radiation type | Cu Kα |
µ (mm−1) | 0.85 |
Crystal size (mm) | 0.55 × 0.20 × 0.20 |
Data collection | |
Diffractometer | Rigaku R-AXIS RAPID |
Absorption correction | Numerical (NUMABS; Higashi, 1999) |
Tmin, Tmax | 0.653, 0.849 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 29060, 2942, 2685 |
Rint | 0.022 |
(sin θ/λ)max (Å−1) | 0.602 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.033, 0.090, 1.00 |
No. of reflections | 2942 |
No. of parameters | 229 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.19, −0.14 |
Computer programs: PROCESS-AUTO (Rigaku, 1998), CrystalStructure (Rigaku/MSC, 2004), SIR2004 (Burla et al., 2005), SHELXL97 (Sheldrick, 2008), ORTEPIII (Burnett & Johnson, 1996).
D—H···A | D—H | H···A | D···A | D—H···A |
C4—H4···O1i | 0.95 | 2.60 | 3.3150 (15) | 132 |
C9—H9···O1 | 0.95 | 2.56 | 3.0935 (14) | 116 |
C17—H17···O5i | 0.95 | 2.37 | 3.2028 (15) | 146 |
Symmetry code: (i) x−1, y, z. |
Acknowledgements
The authors would express their gratitude to Professor Keiichi Noguchi, Instrumentation Analysis Center, Tokyo University of Agriculture & Technology, for technical advice. This work was partially supported by the Sasakawa Scientific Research Grant from The Japan Science Society.
References
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
In the course of our study on electrophilic aromatic aroylation of 2,7-dimethoxynaphthalene, peri-aroylnaphthalene compounds have been found to be formed regioselectively with the aid of suitable acidic mediators (Okamoto & Yonezawa, 2009). We have reported the X-ray crystal structures of 1,8-diaroylated 2,7-dimethoxynaphthalenes such as 1,8-bis(4-methylbenzoyl)-2,7-dimethoxynaphthalene (Muto et al., 2010) and 1,8-bis(4-aminobenzoyl)-2,7-dimethoxynaphthalene (Nishijima et al., 2010). In these compounds, the aroyl groups are oriented in opposite directions. The benzene rings of the aroyl groups are largely out of the plane of the naphthalene ring. Moreover, the ketone carbonyl vectors are out of the planes of the benzene rings and also out of the plane of the naphthalene ring at the same time. The aromatic rings in this type of molecule are assembled with non-coplanar configuration resulting in partial disruption of π-conjugated ring systems. Furthermore, the crystal structures of 1-monoaroylated naphthalene compounds, i. e., 1-(4-chlorobenzoyl)-2,7-dimethoxynaphthalene (Mitsui et al., 2008) and (2,7-dimethoxynaphthalen-1-yl)(phenyl)methanone (Kato et al., 2010), also exhibit essentially the same non-coplanar conformation as the 1,8-diaroylated naphthalene compounds. As a part of our continuous studies on the molecular structures of these kinds of homologous molecules, the X-ray crystal structure of title compound, (I), 1-monoaroylnaphthalene with a nitro substituent, is discussed in this article.
An ORTEPIII (Burnett & Johnson, 1996) plot of title compound is displayed in Fig. 1. The interplanar angle between the benzene ring (C12–C17) and the naphthalene ring (C1–C10) is 69.59 (5)°. The bridging carbonyl plane [C1—C11(═O1)—C12] makes dihedral angles with the naphthalene ring system and the benzene ring, viz., 61.02 (6)° [C10—C1—C11—O1 torsion angle = -59.97 (15)°] and 12.68 (7)° [O1—C1—C12—C13 torsion angle = -12.50 (17)°]. The interplanar angle and the dihedral angles are slightly larger than those of 1-(4-nitrobenzoyl)-2,7-dimethoxynaphthalene [Watanabe et al., 2010; interplanar angle = 61.97 (5)°, dihedral angles = 54.68 (6) and 12.54 (7)°]. On the other hand, both 1-monoaroylnaphthalene analogues with a nitro group have a relatively small dihedral angle between the benzene ring and naphthalene ring system compared to other 1-monoaroylnaphthalene homologues. This difference is presumably caused by the intramolecular C—H···O═C interaction, which forms a six-membered ring including the carbonyl group and a naphthalene hydrogen atom (Fig. 1 and Table 1). Besides, the nitro group is slightly out of the plane of the benzene ring [O5—N1—C14—C13 torsion angle = 4.97 (17)°].
In the crystal, the molecular packing is stabilized by C—H···O interactions between a hydrogen atom on the benzene ring and a nitro oxygen atom (C17—H17···O5 = 2.37 Å; Fig. 2 and Table 1). Furthermore, the carbonyl group and the naphthalene ring are connected with a weak C—H···O interaction (C4—H4···O1 = 2.60 Å).