organic compounds
[2,7-Dimethoxy-8-(4-propylbenzoyl)naphthalen-1-yl](4-propylphenyl)methanone
aDepartment of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture & Technology, Koganei, Tokyo 184-8588, Japan
*Correspondence e-mail: aokamoto@cc.tuat.ac.jp
In the title compound, C32H32O4, the 4-propylbenzoyl groups at the 1- and 8-positions of the naphthalene ring system are aligned almost antiparallel, and their benzene rings make a dihedral angle of 8.64 (10)°. The dihedral angles between the naphthalene ring system and the benzene rings are 69.37 (8) and 69.45 (8)°. In the crystal, C—H⋯O interactions link adjacent molecules via their aroyl groups.
Related literature
For the formation reaction of aroylated naphthalene compounds via electrophilic aromatic substitution of naphthalene derivatives, see: Okamoto & Yonezawa (2009); Okamoto et al. (2011). For the structures of closely related compounds, see: Hijikata et al. (2010); Muto et al. (2010); Sasagawa, Hijikata et al. (2011); Sasagawa, Muto et al. (2011); Sasagawa et al. (2012).
Experimental
Crystal data
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Refinement
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Data collection: RAPID-AUTO (Rigaku, 1998); cell RAPID-AUTO; data reduction: RAPID-AUTO; program(s) used to solve structure: Il Milione (Burla et al., 2007); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: CrystalStructure (Rigaku, 2010); software used to prepare material for publication: CrystalStructure.
Supporting information
https://doi.org/10.1107/S1600536812033582/hb6909sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536812033582/hb6909Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536812033582/hb6909Isup3.cml
To a 50 ml flask, 4-propylbenzoic acid (722 mg, 4.4 mmol), phosphorus pentoxide–methanesulfonic acid mixture (P2O5–MsOH [1/10 w/w]; 8.8 ml) were placed and stirred at 333 K. To the solution thus obtained, 2,7-dimethoxynaphthalene (376 mg, 2.0 mmol) was added. After the reaction mixture was stirred at 333 K for 1.5 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 cake. The crude product was purified by recrystallization from methanol (54% yield). Colorless platelet single crystals were obtained by repeated crystallization from ethanol solution.
1H-NMR δ (300 MHz, CDCl3): 0.95 (6H, t, J = 7.2 Hz), 1.65 (4H, q, J = 7.2 Hz), 2.60 (4H, t, J =7.2 Hz), 3.69 (6H, s), 7.11 (4H, d, J = 7.5 Hz), 7.21 (2H, d, J = 8.7 Hz), 7.58 (4H, d, J = 7.5 Hz), 7.94 (2H, d, J = 9.0 Hz) p.p.m.
13C-NMR δ (75 MHz, CDCl3): 13.9, 24.0, 38.2, 56.5, 111.3, 121.9, 125.5, 128.0, 129.2, 129.6, 131.8, 136.5, 147.8, 156.1, 196.2 p.p.m.
IR (KBr): 2952 (CH3), 2927 (CH2), 1656 (C=O), 1605, 1510, 1460 (Ar) cm-1
HRMS (m/z): [M+H]+ calcd. for C32H33O4,481.2379, found, 481.2421.
m.p. = 447.1—448.9 K
All H atoms were found in a difference map and were subsequently refined as riding atoms, with C—H = 0.95 (aromatic) and 0.98 (methyl) Å, and with Uĩso(H) = 1.2 Ueq(C).
In the course of our study on selective electrophilic aromatic aroylation of the naphthalene ring core, 1,8-diaroylnaphthalene compounds have proved to be formed regioselectively by the aid of a suitable acidic mediator (Okamoto & Yonezawa, 2009, Okamoto et al., 2011). Recently, we have reported the X-ray crystal structures of 1,8-diaroylated 2,7-dimethoxynaphthalene derivatives such as [2,7-dimethoxy-8-(4-methylbenzoyl)-1-naphthyl](4-methylphenyl)methanone [1,8-bis(4-methylbenzoyl)-2,7-dimethoxynaphthalene] (Muto et al., 2010), {8-[4-(bromomethyl)benzoyl]-2,7-dimethoxynaphthalen-1-yl}[4-(bromomethyl)phenyl]methanone [1,8-bis(4-bromomethylbenzoyl)-2,7-dimethoxynaphthalene] (Sasagawa, Hijikata et al., 2011), {8-[4-(butoxy)benzoyl]-2,7-dimethoxynaphthalen-1-yl}[4-(butoxy)phenyl]methanone [1,8-bis(4-butoxylbenzoyl)-2,7-dimethoxynaphthalene] (Sasagawa, Muto et al., 2011), and 4-{[8-(4-acetyloxybenzoyl)-2,7-dimethoxynaphthalen-1-yl]carbonyl}phenyl acetate [1,8-bis(4-acetoxybenzoyl)-2,7-dimethoxynaphthalene] (Sasagawa et al., 2012). The aroyl groups in these compounds are almost perpendicularly attached to the naphthalene rings and oriented in opposite directions (anti-orientation). Moreover, we have also shown that the aroyl groups of 2,7-dimethoxy-1,8-bis(4-phenoxybenzoyl)naphthalene (Hijikata et al., 2010) are oriented in same direction (syn-orientation). As part of our ongoing studies on the molecular structures of these kinds of homologous molecules, the X-ray
of the title compound, 1,8-diaroylated naphthalene bearing propyl groups, is discussed in this article.The molecular structure of the title compound is displayed in Fig 1. Two 4-propylbenzoyl groups are situated in anti-orientation. The dihedral angle between the best planes of the two phenyl rings is 8.64 (10) °. The dihedral angles between the best planes of the 4-propylphenyl rings and the naphthalene ring are 69.37 (8) and 69.45 (8) °.
Ketonic carbonyl moieties (C11, O3; C21, O4), carbon atoms (C18; C28) of propyl groups and benzene ring are lie on the same plane [torsion angles O3—C11—C14—C12 = -179.58 (18)°, C18—C15—C17—C16 = 178.9 (2)°; O4—C21—C23—C25 = -178.18 (19)°, C28—C26—C27—C25 = -179.5 (2)°].
In the molecular packing, two types of C—H···O interactions between carbonyl oxygen atom and hydrogen atom of the benzene ring are observed (Fig. 2).
For the formation reaction of aroylated naphthalene compounds via electrophilic aromatic substitution of naphthalene derivatives, see: Okamoto et al. (2009, 2011). For the structures of closely related compounds, see: Hijikata et al. (2010); Muto et al. (2010); Sasagawa, Hijikata et al. (2011); Sasagawa, Muto et al. (2011); Sasagawa et al. (2012).
Data collection: RAPID-AUTO (Rigaku, 1998); cell
RAPID-AUTO (Rigaku, 1998); data reduction: RAPID-AUTO (Rigaku, 1998); program(s) used to solve structure: Il Milione (Burla et al., 2007); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: CrystalStructure (Rigaku, 2010); software used to prepare material for publication: CrystalStructure (Rigaku, 2010).C32H32O4 | F(000) = 1024 |
Mr = 480.58 | Dx = 1.229 Mg m−3 |
Monoclinic, P21/n | Melting point = 448.9–447.1 K |
Hall symbol: -P 2yn | Cu Kα radiation, λ = 1.54187 Å |
a = 18.1224 (3) Å | Cell parameters from 25236 reflections |
b = 7.91914 (14) Å | θ = 4.3–68.2° |
c = 19.7355 (4) Å | µ = 0.63 mm−1 |
β = 113.502 (1)° | T = 193 K |
V = 2597.37 (8) Å3 | Platelet, colorless |
Z = 4 | 0.40 × 0.30 × 0.05 mm |
Rigaku R-AXIS RAPID diffractometer | 4752 independent reflections |
Radiation source: rotating anode | 3258 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.047 |
Detector resolution: 10.000 pixels mm-1 | θmax = 68.2°, θmin = 4.3° |
ω scans | h = −21→21 |
Absorption correction: numerical (NUMABS; Higashi, 1999) | k = −9→9 |
Tmin = 0.786, Tmax = 0.969 | l = −23→23 |
45013 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)] = 0.048 | H-atom parameters constrained |
wR(F2) = 0.152 | w = 1/[σ2(Fo2) + (0.0684P)2 + 0.7538P] where P = (Fo2 + 2Fc2)/3 |
S = 1.10 | (Δ/σ)max < 0.001 |
4752 reflections | Δρmax = 0.22 e Å−3 |
330 parameters | Δρmin = −0.26 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: 0.0024 (2) |
C32H32O4 | V = 2597.37 (8) Å3 |
Mr = 480.58 | Z = 4 |
Monoclinic, P21/n | Cu Kα radiation |
a = 18.1224 (3) Å | µ = 0.63 mm−1 |
b = 7.91914 (14) Å | T = 193 K |
c = 19.7355 (4) Å | 0.40 × 0.30 × 0.05 mm |
β = 113.502 (1)° |
Rigaku R-AXIS RAPID diffractometer | 4752 independent reflections |
Absorption correction: numerical (NUMABS; Higashi, 1999) | 3258 reflections with I > 2σ(I) |
Tmin = 0.786, Tmax = 0.969 | Rint = 0.047 |
45013 measured reflections |
R[F2 > 2σ(F2)] = 0.048 | 0 restraints |
wR(F2) = 0.152 | H-atom parameters constrained |
S = 1.10 | Δρmax = 0.22 e Å−3 |
4752 reflections | Δρmin = −0.26 e Å−3 |
330 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 | 0.24425 (9) | 0.4558 (2) | 0.71149 (8) | 0.0569 (4) | |
O2 | 0.01824 (9) | 0.1904 (2) | 0.33799 (8) | 0.0610 (4) | |
O3 | 0.27655 (8) | 0.20263 (18) | 0.58444 (8) | 0.0532 (4) | |
O4 | 0.17938 (9) | 0.44541 (18) | 0.42987 (8) | 0.0542 (4) | |
C1 | 0.03056 (14) | 0.3547 (3) | 0.61602 (12) | 0.0540 (5) | |
H1 | −0.0172 | 0.3500 | 0.6250 | 0.065* | |
C2 | −0.04538 (13) | 0.2496 (3) | 0.49034 (13) | 0.0535 (5) | |
H2 | −0.0924 | 0.2435 | 0.5005 | 0.064* | |
C3 | 0.10007 (13) | 0.4085 (3) | 0.67087 (13) | 0.0548 (5) | |
H3 | 0.1008 | 0.4425 | 0.7173 | 0.066* | |
C4 | 0.02756 (12) | 0.3058 (3) | 0.54627 (12) | 0.0467 (5) | |
C5 | −0.04981 (13) | 0.2041 (3) | 0.42247 (13) | 0.0553 (6) | |
H5 | −0.0989 | 0.1634 | 0.3860 | 0.066* | |
C6 | 0.17079 (12) | 0.4131 (3) | 0.65775 (11) | 0.0467 (5) | |
C7 | 0.09867 (11) | 0.3134 (2) | 0.53196 (11) | 0.0422 (5) | |
C8 | 0.01909 (12) | 0.2179 (3) | 0.40692 (12) | 0.0499 (5) | |
C9 | 0.17178 (12) | 0.3663 (2) | 0.59093 (10) | 0.0421 (5) | |
C10 | 0.09209 (12) | 0.2697 (2) | 0.45953 (11) | 0.0436 (5) | |
C11 | 0.25296 (12) | 0.3465 (3) | 0.58720 (10) | 0.0434 (5) | |
C12 | 0.27818 (12) | 0.6589 (3) | 0.59160 (11) | 0.0478 (5) | |
H12 | 0.2277 | 0.6783 | 0.5944 | 0.057* | |
C13 | 0.32583 (13) | 0.7945 (3) | 0.59118 (12) | 0.0534 (5) | |
H13 | 0.3076 | 0.9060 | 0.5935 | 0.064* | |
C14 | 0.30310 (11) | 0.4946 (2) | 0.58802 (10) | 0.0423 (5) | |
C15 | 0.40005 (13) | 0.7706 (3) | 0.58743 (11) | 0.0518 (5) | |
C16 | 0.37687 (12) | 0.4698 (3) | 0.58295 (11) | 0.0507 (5) | |
H16 | 0.3947 | 0.3584 | 0.5797 | 0.061* | |
C17 | 0.42412 (13) | 0.6057 (3) | 0.58265 (12) | 0.0551 (6) | |
H17 | 0.4742 | 0.5866 | 0.5791 | 0.066* | |
C18 | 0.45184 (15) | 0.9209 (3) | 0.58852 (13) | 0.0658 (7) | |
H18A | 0.4195 | 1.0017 | 0.5498 | 0.079* | |
H18B | 0.4971 | 0.8825 | 0.5764 | 0.079* | |
C19 | 0.48555 (15) | 1.0115 (3) | 0.66281 (14) | 0.0670 (7) | |
H19A | 0.5152 | 1.1129 | 0.6584 | 0.080* | |
H19B | 0.4401 | 1.0500 | 0.6747 | 0.080* | |
C20 | 0.54096 (15) | 0.9046 (4) | 0.72574 (14) | 0.0726 (7) | |
H20A | 0.5112 | 0.8074 | 0.7327 | 0.087* | |
H20B | 0.5618 | 0.9721 | 0.7711 | 0.087* | |
H20C | 0.5859 | 0.8648 | 0.7143 | 0.087* | |
C21 | 0.15938 (12) | 0.2993 (3) | 0.43450 (11) | 0.0445 (5) | |
C22 | 0.17742 (13) | −0.0111 (3) | 0.42097 (11) | 0.0499 (5) | |
H22 | 0.1315 | −0.0332 | 0.4315 | 0.060* | |
C23 | 0.20091 (12) | 0.1545 (2) | 0.41792 (10) | 0.0436 (5) | |
C24 | 0.21995 (14) | −0.1447 (3) | 0.40895 (12) | 0.0546 (6) | |
H24 | 0.2023 | −0.2570 | 0.4104 | 0.065* | |
C25 | 0.26860 (13) | 0.1837 (3) | 0.40237 (12) | 0.0518 (5) | |
H25 | 0.2855 | 0.2960 | 0.3995 | 0.062* | |
C26 | 0.28793 (13) | −0.1169 (3) | 0.39483 (11) | 0.0521 (5) | |
C27 | 0.31099 (13) | 0.0493 (3) | 0.39115 (12) | 0.0550 (6) | |
H27 | 0.3569 | 0.0709 | 0.3807 | 0.066* | |
C28 | 0.33506 (15) | −0.2620 (3) | 0.38310 (12) | 0.0611 (6) | |
H28A | 0.3271 | −0.3622 | 0.4094 | 0.073* | |
H28B | 0.3930 | −0.2330 | 0.4053 | 0.073* | |
C29 | 0.31187 (15) | −0.3071 (3) | 0.30285 (13) | 0.0644 (6) | |
H29A | 0.3181 | −0.2062 | 0.2760 | 0.077* | |
H29B | 0.2545 | −0.3408 | 0.2809 | 0.077* | |
C30 | 0.36266 (15) | −0.4497 (3) | 0.29291 (14) | 0.0688 (7) | |
H30A | 0.4194 | −0.4164 | 0.3139 | 0.083* | |
H30B | 0.3457 | −0.4739 | 0.2401 | 0.083* | |
H30C | 0.3556 | −0.5510 | 0.3182 | 0.083* | |
C31 | 0.24686 (15) | 0.5212 (3) | 0.77932 (12) | 0.0656 (7) | |
H31A | 0.2307 | 0.4331 | 0.8055 | 0.079* | |
H31B | 0.2100 | 0.6173 | 0.7695 | 0.079* | |
H31C | 0.3017 | 0.5583 | 0.8098 | 0.079* | |
C32 | −0.04718 (15) | 0.0998 (4) | 0.28517 (13) | 0.0715 (7) | |
H32A | −0.0550 | −0.0062 | 0.3071 | 0.086* | |
H32B | −0.0355 | 0.0751 | 0.2418 | 0.086* | |
H32C | −0.0962 | 0.1682 | 0.2702 | 0.086* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0583 (9) | 0.0656 (10) | 0.0449 (8) | −0.0052 (7) | 0.0187 (7) | −0.0098 (7) |
O2 | 0.0540 (9) | 0.0761 (11) | 0.0463 (9) | −0.0106 (8) | 0.0131 (7) | −0.0089 (7) |
O3 | 0.0574 (9) | 0.0405 (8) | 0.0617 (9) | 0.0069 (7) | 0.0237 (7) | 0.0021 (7) |
O4 | 0.0629 (9) | 0.0414 (9) | 0.0585 (9) | −0.0071 (7) | 0.0244 (7) | 0.0017 (7) |
C1 | 0.0569 (13) | 0.0492 (13) | 0.0615 (14) | 0.0022 (10) | 0.0296 (11) | 0.0040 (10) |
C2 | 0.0476 (12) | 0.0511 (13) | 0.0618 (14) | −0.0006 (10) | 0.0220 (10) | 0.0066 (10) |
C3 | 0.0626 (14) | 0.0517 (13) | 0.0547 (13) | −0.0001 (11) | 0.0285 (11) | −0.0031 (10) |
C4 | 0.0485 (11) | 0.0405 (11) | 0.0531 (12) | 0.0021 (9) | 0.0224 (10) | 0.0044 (9) |
C5 | 0.0448 (11) | 0.0547 (14) | 0.0597 (14) | −0.0039 (10) | 0.0137 (10) | 0.0014 (11) |
C6 | 0.0497 (11) | 0.0410 (11) | 0.0480 (11) | 0.0003 (9) | 0.0182 (9) | 0.0004 (9) |
C7 | 0.0427 (10) | 0.0352 (11) | 0.0476 (11) | 0.0003 (8) | 0.0166 (9) | 0.0030 (8) |
C8 | 0.0491 (12) | 0.0489 (12) | 0.0486 (12) | −0.0028 (10) | 0.0163 (10) | 0.0002 (9) |
C9 | 0.0489 (11) | 0.0343 (10) | 0.0439 (10) | 0.0009 (8) | 0.0195 (9) | 0.0016 (8) |
C10 | 0.0454 (11) | 0.0377 (11) | 0.0458 (11) | −0.0014 (8) | 0.0163 (9) | 0.0016 (9) |
C11 | 0.0481 (11) | 0.0395 (11) | 0.0398 (10) | 0.0039 (9) | 0.0145 (9) | 0.0018 (8) |
C12 | 0.0438 (11) | 0.0430 (12) | 0.0525 (12) | 0.0015 (9) | 0.0148 (9) | 0.0006 (9) |
C13 | 0.0523 (12) | 0.0440 (12) | 0.0600 (13) | −0.0038 (10) | 0.0182 (10) | 0.0002 (10) |
C14 | 0.0404 (10) | 0.0414 (11) | 0.0406 (10) | 0.0011 (8) | 0.0113 (8) | 0.0025 (8) |
C15 | 0.0504 (12) | 0.0553 (14) | 0.0439 (11) | −0.0089 (10) | 0.0125 (9) | 0.0045 (10) |
C16 | 0.0482 (12) | 0.0520 (13) | 0.0504 (12) | 0.0060 (10) | 0.0180 (9) | 0.0043 (10) |
C17 | 0.0440 (11) | 0.0649 (15) | 0.0549 (13) | −0.0014 (10) | 0.0182 (10) | 0.0059 (11) |
C18 | 0.0593 (14) | 0.0668 (16) | 0.0628 (14) | −0.0163 (12) | 0.0155 (11) | 0.0118 (12) |
C19 | 0.0604 (14) | 0.0570 (15) | 0.0795 (17) | −0.0157 (12) | 0.0235 (13) | −0.0025 (13) |
C20 | 0.0643 (15) | 0.091 (2) | 0.0588 (15) | −0.0128 (14) | 0.0202 (12) | −0.0067 (14) |
C21 | 0.0470 (11) | 0.0405 (12) | 0.0429 (11) | −0.0039 (9) | 0.0146 (9) | 0.0012 (9) |
C22 | 0.0580 (13) | 0.0446 (12) | 0.0521 (12) | −0.0020 (10) | 0.0273 (10) | 0.0030 (9) |
C23 | 0.0475 (11) | 0.0427 (11) | 0.0398 (10) | −0.0029 (9) | 0.0165 (9) | 0.0011 (8) |
C24 | 0.0701 (15) | 0.0437 (12) | 0.0542 (13) | −0.0003 (11) | 0.0292 (11) | 0.0017 (10) |
C25 | 0.0541 (12) | 0.0493 (13) | 0.0549 (13) | −0.0088 (10) | 0.0246 (10) | −0.0023 (10) |
C26 | 0.0566 (13) | 0.0561 (14) | 0.0413 (11) | 0.0072 (10) | 0.0173 (10) | 0.0013 (9) |
C27 | 0.0510 (12) | 0.0631 (15) | 0.0548 (13) | −0.0016 (11) | 0.0251 (10) | −0.0034 (11) |
C28 | 0.0656 (14) | 0.0632 (15) | 0.0531 (13) | 0.0123 (12) | 0.0221 (11) | 0.0000 (11) |
C29 | 0.0605 (14) | 0.0694 (16) | 0.0560 (14) | 0.0108 (12) | 0.0155 (11) | −0.0096 (12) |
C30 | 0.0701 (16) | 0.0726 (17) | 0.0580 (14) | 0.0131 (13) | 0.0196 (12) | −0.0115 (12) |
C31 | 0.0765 (16) | 0.0654 (16) | 0.0512 (13) | 0.0056 (13) | 0.0217 (12) | −0.0117 (11) |
C32 | 0.0639 (15) | 0.0814 (18) | 0.0574 (14) | −0.0151 (13) | 0.0117 (12) | −0.0142 (13) |
O1—C6 | 1.373 (2) | C18—H18A | 0.9900 |
O1—C31 | 1.418 (2) | C18—H18B | 0.9900 |
O2—C8 | 1.372 (2) | C19—C20 | 1.507 (3) |
O2—C32 | 1.422 (3) | C19—H19A | 0.9900 |
O3—C11 | 1.226 (2) | C19—H19B | 0.9900 |
O4—C21 | 1.226 (2) | C20—H20A | 0.9800 |
C1—C3 | 1.361 (3) | C20—H20B | 0.9800 |
C1—C4 | 1.410 (3) | C20—H20C | 0.9800 |
C1—H1 | 0.9500 | C21—C23 | 1.478 (3) |
C2—C5 | 1.358 (3) | C22—C24 | 1.383 (3) |
C2—C4 | 1.414 (3) | C22—C23 | 1.388 (3) |
C2—H2 | 0.9500 | C22—H22 | 0.9500 |
C3—C6 | 1.405 (3) | C23—C25 | 1.397 (3) |
C3—H3 | 0.9500 | C24—C26 | 1.385 (3) |
C4—C7 | 1.426 (3) | C24—H24 | 0.9500 |
C5—C8 | 1.404 (3) | C25—C27 | 1.381 (3) |
C5—H5 | 0.9500 | C25—H25 | 0.9500 |
C6—C9 | 1.377 (3) | C26—C27 | 1.392 (3) |
C7—C10 | 1.429 (3) | C26—C28 | 1.503 (3) |
C7—C9 | 1.434 (3) | C27—H27 | 0.9500 |
C8—C10 | 1.379 (3) | C28—C29 | 1.511 (3) |
C9—C11 | 1.510 (3) | C28—H28A | 0.9900 |
C10—C21 | 1.506 (3) | C28—H28B | 0.9900 |
C11—C14 | 1.480 (3) | C29—C30 | 1.518 (3) |
C12—C13 | 1.380 (3) | C29—H29A | 0.9900 |
C12—C14 | 1.389 (3) | C29—H29B | 0.9900 |
C12—H12 | 0.9500 | C30—H30A | 0.9800 |
C13—C15 | 1.389 (3) | C30—H30B | 0.9800 |
C13—H13 | 0.9500 | C30—H30C | 0.9800 |
C14—C16 | 1.394 (3) | C31—H31A | 0.9800 |
C15—C17 | 1.392 (3) | C31—H31B | 0.9800 |
C15—C18 | 1.511 (3) | C31—H31C | 0.9800 |
C16—C17 | 1.377 (3) | C32—H32A | 0.9800 |
C16—H16 | 0.9500 | C32—H32B | 0.9800 |
C17—H17 | 0.9500 | C32—H32C | 0.9800 |
C18—C19 | 1.524 (3) | ||
C6—O1—C31 | 118.44 (17) | C18—C19—H19A | 108.7 |
C8—O2—C32 | 118.93 (18) | C20—C19—H19B | 108.7 |
C3—C1—C4 | 121.7 (2) | C18—C19—H19B | 108.7 |
C3—C1—H1 | 119.1 | H19A—C19—H19B | 107.6 |
C4—C1—H1 | 119.1 | C19—C20—H20A | 109.5 |
C5—C2—C4 | 121.5 (2) | C19—C20—H20B | 109.5 |
C5—C2—H2 | 119.3 | H20A—C20—H20B | 109.5 |
C4—C2—H2 | 119.3 | C19—C20—H20C | 109.5 |
C1—C3—C6 | 119.0 (2) | H20A—C20—H20C | 109.5 |
C1—C3—H3 | 120.5 | H20B—C20—H20C | 109.5 |
C6—C3—H3 | 120.5 | O4—C21—C23 | 121.58 (18) |
C1—C4—C2 | 120.58 (19) | O4—C21—C10 | 118.27 (18) |
C1—C4—C7 | 119.70 (19) | C23—C21—C10 | 120.13 (17) |
C2—C4—C7 | 119.73 (19) | C24—C22—C23 | 120.90 (19) |
C2—C5—C8 | 119.1 (2) | C24—C22—H22 | 119.6 |
C2—C5—H5 | 120.4 | C23—C22—H22 | 119.6 |
C8—C5—H5 | 120.4 | C22—C23—C25 | 118.49 (19) |
O1—C6—C9 | 115.29 (18) | C22—C23—C21 | 122.13 (18) |
O1—C6—C3 | 122.58 (19) | C25—C23—C21 | 119.29 (18) |
C9—C6—C3 | 122.04 (19) | C22—C24—C26 | 121.0 (2) |
C4—C7—C10 | 117.79 (18) | C22—C24—H24 | 119.5 |
C4—C7—C9 | 117.85 (18) | C26—C24—H24 | 119.5 |
C10—C7—C9 | 124.36 (17) | C27—C25—C23 | 120.1 (2) |
O2—C8—C10 | 114.97 (18) | C27—C25—H25 | 120.0 |
O2—C8—C5 | 123.04 (19) | C23—C25—H25 | 120.0 |
C10—C8—C5 | 121.9 (2) | C24—C26—C27 | 118.0 (2) |
C6—C9—C7 | 119.69 (18) | C24—C26—C28 | 121.0 (2) |
C6—C9—C11 | 117.36 (17) | C27—C26—C28 | 120.9 (2) |
C7—C9—C11 | 122.22 (17) | C25—C27—C26 | 121.5 (2) |
C8—C10—C7 | 119.86 (18) | C25—C27—H27 | 119.3 |
C8—C10—C21 | 117.30 (18) | C26—C27—H27 | 119.3 |
C7—C10—C21 | 122.34 (17) | C26—C28—C29 | 113.86 (19) |
O3—C11—C14 | 120.92 (18) | C26—C28—H28A | 108.8 |
O3—C11—C9 | 117.53 (18) | C29—C28—H28A | 108.8 |
C14—C11—C9 | 121.55 (17) | C26—C28—H28B | 108.8 |
C13—C12—C14 | 120.78 (19) | C29—C28—H28B | 108.8 |
C13—C12—H12 | 119.6 | H28A—C28—H28B | 107.7 |
C14—C12—H12 | 119.6 | C28—C29—C30 | 112.45 (19) |
C12—C13—C15 | 121.1 (2) | C28—C29—H29A | 109.1 |
C12—C13—H13 | 119.5 | C30—C29—H29A | 109.1 |
C15—C13—H13 | 119.5 | C28—C29—H29B | 109.1 |
C12—C14—C16 | 118.47 (19) | C30—C29—H29B | 109.1 |
C12—C14—C11 | 122.18 (18) | H29A—C29—H29B | 107.8 |
C16—C14—C11 | 119.33 (18) | C29—C30—H30A | 109.5 |
C13—C15—C17 | 117.9 (2) | C29—C30—H30B | 109.5 |
C13—C15—C18 | 120.1 (2) | H30A—C30—H30B | 109.5 |
C17—C15—C18 | 122.0 (2) | C29—C30—H30C | 109.5 |
C17—C16—C14 | 120.4 (2) | H30A—C30—H30C | 109.5 |
C17—C16—H16 | 119.8 | H30B—C30—H30C | 109.5 |
C14—C16—H16 | 119.8 | O1—C31—H31A | 109.5 |
C16—C17—C15 | 121.4 (2) | O1—C31—H31B | 109.5 |
C16—C17—H17 | 119.3 | H31A—C31—H31B | 109.5 |
C15—C17—H17 | 119.3 | O1—C31—H31C | 109.5 |
C15—C18—C19 | 113.14 (19) | H31A—C31—H31C | 109.5 |
C15—C18—H18A | 109.0 | H31B—C31—H31C | 109.5 |
C19—C18—H18A | 109.0 | O2—C32—H32A | 109.5 |
C15—C18—H18B | 109.0 | O2—C32—H32B | 109.5 |
C19—C18—H18B | 109.0 | H32A—C32—H32B | 109.5 |
H18A—C18—H18B | 107.8 | O2—C32—H32C | 109.5 |
C20—C19—C18 | 114.1 (2) | H32A—C32—H32C | 109.5 |
C20—C19—H19A | 108.7 | H32B—C32—H32C | 109.5 |
C4—C1—C3—C6 | −0.9 (3) | C14—C12—C13—C15 | −0.2 (3) |
C3—C1—C4—C2 | 179.7 (2) | C13—C12—C14—C16 | −0.9 (3) |
C3—C1—C4—C7 | −0.5 (3) | C13—C12—C14—C11 | −179.05 (19) |
C5—C2—C4—C1 | 179.1 (2) | O3—C11—C14—C12 | −179.58 (19) |
C5—C2—C4—C7 | −0.8 (3) | C9—C11—C14—C12 | −0.6 (3) |
C4—C2—C5—C8 | −1.9 (3) | O3—C11—C14—C16 | 2.3 (3) |
C31—O1—C6—C9 | 173.89 (19) | C9—C11—C14—C16 | −178.71 (17) |
C31—O1—C6—C3 | −9.4 (3) | C12—C13—C15—C17 | 1.2 (3) |
C1—C3—C6—O1 | −175.9 (2) | C12—C13—C15—C18 | −178.8 (2) |
C1—C3—C6—C9 | 0.6 (3) | C12—C14—C16—C17 | 1.0 (3) |
C1—C4—C7—C10 | −177.32 (19) | C11—C14—C16—C17 | 179.17 (18) |
C2—C4—C7—C10 | 2.5 (3) | C14—C16—C17—C15 | 0.1 (3) |
C1—C4—C7—C9 | 2.0 (3) | C13—C15—C17—C16 | −1.2 (3) |
C2—C4—C7—C9 | −178.17 (18) | C18—C15—C17—C16 | 178.9 (2) |
C32—O2—C8—C10 | 165.2 (2) | C13—C15—C18—C19 | 68.8 (3) |
C32—O2—C8—C5 | −18.2 (3) | C17—C15—C18—C19 | −111.2 (3) |
C2—C5—C8—O2 | −173.6 (2) | C15—C18—C19—C20 | 62.7 (3) |
C2—C5—C8—C10 | 2.8 (3) | C8—C10—C21—O4 | 107.1 (2) |
O1—C6—C9—C7 | 177.76 (17) | C7—C10—C21—O4 | −64.8 (3) |
C3—C6—C9—C7 | 1.0 (3) | C8—C10—C21—C23 | −74.3 (2) |
O1—C6—C9—C11 | 7.3 (3) | C7—C10—C21—C23 | 113.7 (2) |
C3—C6—C9—C11 | −169.44 (19) | C24—C22—C23—C25 | 0.0 (3) |
C4—C7—C9—C6 | −2.2 (3) | C24—C22—C23—C21 | −176.60 (19) |
C10—C7—C9—C6 | 177.02 (18) | O4—C21—C23—C22 | −178.17 (19) |
C4—C7—C9—C11 | 167.69 (17) | C10—C21—C23—C22 | 3.3 (3) |
C10—C7—C9—C11 | −13.1 (3) | O4—C21—C23—C25 | 5.2 (3) |
O2—C8—C10—C7 | 175.68 (17) | C10—C21—C23—C25 | −173.28 (18) |
C5—C8—C10—C7 | −1.0 (3) | C23—C22—C24—C26 | 1.1 (3) |
O2—C8—C10—C21 | 3.5 (3) | C22—C23—C25—C27 | −0.6 (3) |
C5—C8—C10—C21 | −173.08 (19) | C21—C23—C25—C27 | 176.10 (19) |
C4—C7—C10—C8 | −1.7 (3) | C22—C24—C26—C27 | −1.7 (3) |
C9—C7—C10—C8 | 179.06 (19) | C22—C24—C26—C28 | 178.9 (2) |
C4—C7—C10—C21 | 170.04 (18) | C23—C25—C27—C26 | 0.1 (3) |
C9—C7—C10—C21 | −9.2 (3) | C24—C26—C27—C25 | 1.1 (3) |
C6—C9—C11—O3 | 106.1 (2) | C28—C26—C27—C25 | −179.5 (2) |
C7—C9—C11—O3 | −64.1 (3) | C24—C26—C28—C29 | 94.9 (3) |
C6—C9—C11—C14 | −73.0 (2) | C27—C26—C28—C29 | −84.5 (3) |
C7—C9—C11—C14 | 116.9 (2) | C26—C28—C29—C30 | 177.9 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
C13—H13···O3i | 0.95 | 2.41 | 3.342 (3) | 168 |
C24—H24···O4ii | 0.95 | 2.45 | 3.390 (3) | 170 |
Symmetry codes: (i) x, y+1, z; (ii) x, y−1, z. |
Experimental details
Crystal data | |
Chemical formula | C32H32O4 |
Mr | 480.58 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 193 |
a, b, c (Å) | 18.1224 (3), 7.91914 (14), 19.7355 (4) |
β (°) | 113.502 (1) |
V (Å3) | 2597.37 (8) |
Z | 4 |
Radiation type | Cu Kα |
µ (mm−1) | 0.63 |
Crystal size (mm) | 0.40 × 0.30 × 0.05 |
Data collection | |
Diffractometer | Rigaku R-AXIS RAPID |
Absorption correction | Numerical (NUMABS; Higashi, 1999) |
Tmin, Tmax | 0.786, 0.969 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 45013, 4752, 3258 |
Rint | 0.047 |
(sin θ/λ)max (Å−1) | 0.602 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.048, 0.152, 1.10 |
No. of reflections | 4752 |
No. of parameters | 330 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.22, −0.26 |
Computer programs: RAPID-AUTO (Rigaku, 1998), Il Milione (Burla et al., 2007), SHELXL97 (Sheldrick, 2008), CrystalStructure (Rigaku, 2010).
D—H···A | D—H | H···A | D···A | D—H···A |
C13—H13···O3i | 0.95 | 2.41 | 3.342 (3) | 168 |
C24—H24···O4ii | 0.95 | 2.45 | 3.390 (3) | 170 |
Symmetry codes: (i) x, y+1, z; (ii) x, y−1, z. |
Acknowledgements
The authors express their gratitude to Master Toyokazu Muto, Department of Organic and Polymer Materials Chemistry, Graduate School, Tokyo University of Agriculture & Technology, and Professor Keiichi Noguchi, Instrumentation Analysis Center, Tokyo University of Agriculture and Technology, for their technical advice. This work was partially supported by a Sasagawa 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 selective electrophilic aromatic aroylation of the naphthalene ring core, 1,8-diaroylnaphthalene compounds have proved to be formed regioselectively by the aid of a suitable acidic mediator (Okamoto & Yonezawa, 2009, Okamoto et al., 2011). Recently, we have reported the X-ray crystal structures of 1,8-diaroylated 2,7-dimethoxynaphthalene derivatives such as [2,7-dimethoxy-8-(4-methylbenzoyl)-1-naphthyl](4-methylphenyl)methanone [1,8-bis(4-methylbenzoyl)-2,7-dimethoxynaphthalene] (Muto et al., 2010), {8-[4-(bromomethyl)benzoyl]-2,7-dimethoxynaphthalen-1-yl}[4-(bromomethyl)phenyl]methanone [1,8-bis(4-bromomethylbenzoyl)-2,7-dimethoxynaphthalene] (Sasagawa, Hijikata et al., 2011), {8-[4-(butoxy)benzoyl]-2,7-dimethoxynaphthalen-1-yl}[4-(butoxy)phenyl]methanone [1,8-bis(4-butoxylbenzoyl)-2,7-dimethoxynaphthalene] (Sasagawa, Muto et al., 2011), and 4-{[8-(4-acetyloxybenzoyl)-2,7-dimethoxynaphthalen-1-yl]carbonyl}phenyl acetate [1,8-bis(4-acetoxybenzoyl)-2,7-dimethoxynaphthalene] (Sasagawa et al., 2012). The aroyl groups in these compounds are almost perpendicularly attached to the naphthalene rings and oriented in opposite directions (anti-orientation). Moreover, we have also shown that the aroyl groups of 2,7-dimethoxy-1,8-bis(4-phenoxybenzoyl)naphthalene (Hijikata et al., 2010) are oriented in same direction (syn-orientation). As part of our ongoing studies on the molecular structures of these kinds of homologous molecules, the X-ray crystal structure of the title compound, 1,8-diaroylated naphthalene bearing propyl groups, is discussed in this article.
The molecular structure of the title compound is displayed in Fig 1. Two 4-propylbenzoyl groups are situated in anti-orientation. The dihedral angle between the best planes of the two phenyl rings is 8.64 (10) °. The dihedral angles between the best planes of the 4-propylphenyl rings and the naphthalene ring are 69.37 (8) and 69.45 (8) °.
Ketonic carbonyl moieties (C11, O3; C21, O4), carbon atoms (C18; C28) of propyl groups and benzene ring are lie on the same plane [torsion angles O3—C11—C14—C12 = -179.58 (18)°, C18—C15—C17—C16 = 178.9 (2)°; O4—C21—C23—C25 = -178.18 (19)°, C28—C26—C27—C25 = -179.5 (2)°].
In the molecular packing, two types of C—H···O interactions between carbonyl oxygen atom and hydrogen atom of the benzene ring are observed (Fig. 2).