organic compounds
(2,7-Dimethoxynaphthalen-1-yl)(2,4,6-trimethylphenyl)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: aokamoto@cc.tuat.ac.jp
In the title compound, C22H22O3, the dihedral angle between the naphthalene ring system and the benzene ring is 82.93 (5)°. The bridging carbonyl C—C(=O)—C plane makes dihedral angles of 50.11 (6) and 46.87 (7)°, respectively, with the naphthalene ring system and the benzene ring. In the crystal, three types of weak intermolecular C—H⋯O interactions are observed.
Related literature
For electrophilic aromatic substitution of naphthalene derivatives, see: Okamoto & Yonezawa (2009); Okamoto et al. (2011). For the structures of closely related compounds, see: Muto et al. (2010); Watanabe et al. (2010, 2011).
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/S1600536811039225/zk2031sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536811039225/zk2031Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536811039225/zk2031Isup3.cml
To a 10 ml flask, 2,4,6-trimethylbenzoyl chloride (0.55 mmol, 100 mg), aluminium chloride (0.60 mmol, 80.0 mg) and methylene chloride (1.25 ml) were placed and stirred at 273 K. To the reaction mixture thus obtained, 2,7-dimethoxynaphthalene (0.50 mmol, 94.0 mg) was added. After the reaction mixture was stirred at 273 K for 6 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 (yield 56%). Colorless platelet single crystals suitable for X-ray diffraction were obtained by repeated crystallization from hexane and CHCl3.
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 electrophilic aromatic acylation of 2,7-dimethoxynaphthalene, peri-arylcarbonylnaphthalene compounds have proven to be formed regioselectively with the aid of suitable acidic mediators (Okamoto & Yonezawa, 2009; Okamoto, Mitsui et al., 2011). Recently, we have reported the crystal structures of several 1,8-diarylcarbonylated naphthalene analogues exemplified by 1,8-bis(4-methylbenzoyl)-2,7-dimethoxynaphthalene (Muto et al., 2010). The arylcarbonyl groups at the 1,8-positions of the naphthalene rings in these compounds are connected in an almost perpendicular fashion. Besides, the crystal structures of arylcarbonylated naphthalene homologues, 1-monoarylcarbonylated naphthalene compounds and the β-isomers of 3-monoarylcarbonylated naphthalene compounds, have been also clarified such as (2,7-dimethoxynaphthalen-1-yl)(4-fluorophenyl)methanone (Watanabe et al., 2011) and (3,6-dimethoxy-2-naphthyl)(4-fluorobenzoyl)methanone (Watanabe, Muto, Nagasawa et al., 2010).
As a part of our continuing study on the molecular structures of these homologous molecules, the
of title compound, 1-monoarylcarbonylnaphthalene bearing three methyl groups on the arylcarbonyl group, is discussed in this report.The molecular structure of the title compound is displayed in Fig. 1. The 2,4,6-trimethylphenyl group is out of the plane of the naphthalene ring. The dihedral angle between the best planes of the 2,4,6-trimethylphenyl ring (C12—C17) and the naphthalene ring (C1—C10) is 82.93 (5)°. The carbonyl group makes torsion angles of -130.97 (14) and -131.79 (13)°, respectively, with the naphthalene ring and the benzene ring [C2—C1—C11—O1 torsion angle = -130.97 (14)°; O1—C11—C12—C13 torsion angle = -131.79 (13)°]. In addition, two types of intramolecular C—H···O interactions are observed (C9—H9···O1 = 2.39 Å and C22—H22a···O1 = 2.51 Å; Fig. 1 and Table 1).
In the
the molecular packing of the title compound is stabilized mainly by van der Waals interactions. The crystal packing is additionally stabilized by three types of C—H···O hydrogen bondings: Intermolecular C—H···O hydrogen bonding between the oxygen atom (O1) of the carbonyl group and one hydrogen atom (H4) of the naphthalene ring of the adjacent molecule is formed along the c axis (C4—H4···O1i; Fig. 2 and Table 1). There is also intermolecular C—H···O hydrogen bonding between the oxygen atom (O2) of 2-methoxy group and one hydrogen atom (H7) of the naphthalene ring of the adjacent molecule along the b axis (C7—H7···O2ii; Fig. 3 and Table 1). Furthermore, an intermolecular C—H···O hydrogen bonding between the oxygen atom (O3) of the 7-methoxy group and one hydrogen atom (H18b) of the 2-methoxy group of the adjacent molecule along the ac diagonal (C18—H18b···O3 iii; Fig. 4 and Table 1) is observed.For electrophilic aromatic substitution of naphthalene derivatives, see: Okamoto & Yonezawa (2009); Okamoto et al. (2011). For the structures of closely related compounds, see: Muto et al. (2010); Watanabe et al. (2010, 2011).
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).C22H22O3 | F(000) = 712 |
Mr = 334.40 | Dx = 1.231 Mg m−3 |
Monoclinic, P21/c | Melting point = 408.0–410.0 K |
Hall symbol: -P 2ybc | Cu Kα radiation, λ = 1.54187 Å |
a = 10.5238 (4) Å | Cell parameters from 15327 reflections |
b = 12.2289 (4) Å | θ = 3.2–68.1° |
c = 15.0504 (5) Å | µ = 0.64 mm−1 |
β = 111.340 (2)° | T = 193 K |
V = 1804.11 (11) Å3 | Block, colorless |
Z = 4 | 0.50 × 0.40 × 0.20 mm |
Rigaku R-AXIS RAPID diffractometer | 3295 independent reflections |
Radiation source: rotating anode | 2945 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.023 |
Detector resolution: 10.000 pixels mm-1 | θmax = 68.2°, θmin = 4.5° |
ω scans | h = −12→12 |
Absorption correction: numerical (NUMABS; Higashi, 1999) | k = −14→14 |
Tmin = 0.739, Tmax = 0.882 | l = −18→18 |
32585 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) = 0.112 | w = 1/[σ2(Fo2) + (0.0568P)2 + 0.4166P] where P = (Fo2 + 2Fc2)/3 |
S = 1.08 | (Δ/σ)max < 0.001 |
3295 reflections | Δρmax = 0.26 e Å−3 |
232 parameters | Δρmin = −0.25 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: 0.0080 (5) |
C22H22O3 | V = 1804.11 (11) Å3 |
Mr = 334.40 | Z = 4 |
Monoclinic, P21/c | Cu Kα radiation |
a = 10.5238 (4) Å | µ = 0.64 mm−1 |
b = 12.2289 (4) Å | T = 193 K |
c = 15.0504 (5) Å | 0.50 × 0.40 × 0.20 mm |
β = 111.340 (2)° |
Rigaku R-AXIS RAPID diffractometer | 3295 independent reflections |
Absorption correction: numerical (NUMABS; Higashi, 1999) | 2945 reflections with I > 2σ(I) |
Tmin = 0.739, Tmax = 0.882 | Rint = 0.023 |
32585 measured reflections |
R[F2 > 2σ(F2)] = 0.039 | 0 restraints |
wR(F2) = 0.112 | H-atom parameters constrained |
S = 1.08 | Δρmax = 0.26 e Å−3 |
3295 reflections | Δρmin = −0.25 e Å−3 |
232 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 | 0.37023 (10) | 0.11774 (8) | 0.92101 (7) | 0.0486 (3) | |
O2 | 0.12893 (10) | 0.13899 (8) | 0.66767 (6) | 0.0484 (3) | |
O3 | 0.68551 (11) | 0.43082 (10) | 1.02164 (8) | 0.0629 (3) | |
C1 | 0.30975 (12) | 0.22890 (10) | 0.78444 (9) | 0.0358 (3) | |
C2 | 0.23219 (13) | 0.21417 (11) | 0.68881 (9) | 0.0400 (3) | |
C3 | 0.26304 (15) | 0.27038 (12) | 0.61732 (10) | 0.0481 (4) | |
H3 | 0.2094 | 0.2590 | 0.5519 | 0.058* | |
C4 | 0.37039 (16) | 0.34113 (12) | 0.64283 (10) | 0.0497 (4) | |
H4 | 0.3916 | 0.3780 | 0.5944 | 0.060* | |
C5 | 0.45068 (14) | 0.36101 (11) | 0.73909 (10) | 0.0438 (3) | |
C6 | 0.55965 (15) | 0.43751 (12) | 0.76592 (12) | 0.0539 (4) | |
H6 | 0.5804 | 0.4755 | 0.7178 | 0.065* | |
C7 | 0.63442 (15) | 0.45735 (13) | 0.85870 (13) | 0.0565 (4) | |
H7 | 0.7077 | 0.5081 | 0.8752 | 0.068* | |
C8 | 0.60373 (14) | 0.40273 (12) | 0.93107 (11) | 0.0487 (3) | |
C9 | 0.50014 (13) | 0.32777 (11) | 0.90886 (9) | 0.0415 (3) | |
H9 | 0.4809 | 0.2915 | 0.9584 | 0.050* | |
C10 | 0.42134 (12) | 0.30417 (10) | 0.81193 (9) | 0.0379 (3) | |
C11 | 0.27808 (13) | 0.16488 (10) | 0.85879 (8) | 0.0358 (3) | |
C12 | 0.13503 (13) | 0.15946 (10) | 0.85716 (8) | 0.0353 (3) | |
C13 | 0.05612 (13) | 0.25478 (10) | 0.84617 (9) | 0.0385 (3) | |
C14 | −0.07551 (14) | 0.24589 (11) | 0.84654 (9) | 0.0437 (3) | |
H14 | −0.1292 | 0.3102 | 0.8389 | 0.052* | |
C15 | −0.13086 (14) | 0.14637 (12) | 0.85775 (10) | 0.0458 (3) | |
C16 | −0.05042 (14) | 0.05397 (11) | 0.87003 (10) | 0.0462 (3) | |
H16 | −0.0867 | −0.0146 | 0.8788 | 0.055* | |
C17 | 0.08180 (14) | 0.05783 (10) | 0.86999 (9) | 0.0406 (3) | |
C18 | 0.02367 (17) | 0.14400 (14) | 0.57628 (12) | 0.0638 (4) | |
H18A | −0.0067 | 0.2199 | 0.5618 | 0.077* | |
H18B | −0.0533 | 0.0986 | 0.5759 | 0.077* | |
H18C | 0.0583 | 0.1170 | 0.5281 | 0.077* | |
C19 | 0.66243 (19) | 0.37810 (16) | 1.09841 (13) | 0.0703 (5) | |
H19A | 0.6729 | 0.2989 | 1.0937 | 0.084* | |
H19B | 0.5698 | 0.3944 | 1.0955 | 0.084* | |
H19C | 0.7287 | 0.4046 | 1.1590 | 0.084* | |
C20 | 0.11031 (16) | 0.36753 (11) | 0.83889 (12) | 0.0504 (4) | |
H20A | 0.1250 | 0.3741 | 0.7784 | 0.061* | |
H20B | 0.1969 | 0.3789 | 0.8921 | 0.061* | |
H20C | 0.0441 | 0.4227 | 0.8414 | 0.061* | |
C21 | −0.27449 (16) | 0.14021 (15) | 0.85686 (14) | 0.0639 (5) | |
H21A | −0.2992 | 0.0636 | 0.8606 | 0.077* | |
H21B | −0.3376 | 0.1726 | 0.7977 | 0.077* | |
H21C | −0.2800 | 0.1805 | 0.9117 | 0.077* | |
C22 | 0.16095 (16) | −0.04745 (12) | 0.87986 (13) | 0.0569 (4) | |
H22A | 0.2396 | −0.0467 | 0.9401 | 0.068* | |
H22B | 0.1927 | −0.0544 | 0.8265 | 0.068* | |
H22C | 0.1018 | −0.1095 | 0.8795 | 0.068* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0445 (5) | 0.0555 (6) | 0.0429 (5) | 0.0012 (4) | 0.0126 (4) | 0.0122 (4) |
O2 | 0.0554 (6) | 0.0534 (6) | 0.0327 (5) | −0.0105 (4) | 0.0115 (4) | −0.0034 (4) |
O3 | 0.0491 (6) | 0.0660 (7) | 0.0622 (7) | −0.0138 (5) | 0.0066 (5) | −0.0090 (5) |
C1 | 0.0394 (6) | 0.0382 (6) | 0.0329 (6) | 0.0018 (5) | 0.0168 (5) | 0.0003 (5) |
C2 | 0.0472 (7) | 0.0402 (7) | 0.0346 (7) | 0.0016 (5) | 0.0175 (6) | −0.0010 (5) |
C3 | 0.0649 (9) | 0.0500 (8) | 0.0325 (7) | 0.0041 (7) | 0.0213 (6) | 0.0012 (6) |
C4 | 0.0663 (9) | 0.0480 (8) | 0.0462 (8) | 0.0050 (7) | 0.0341 (7) | 0.0081 (6) |
C5 | 0.0460 (7) | 0.0439 (7) | 0.0491 (8) | 0.0041 (6) | 0.0262 (6) | 0.0052 (6) |
C6 | 0.0526 (8) | 0.0497 (8) | 0.0706 (10) | −0.0007 (6) | 0.0359 (8) | 0.0089 (7) |
C7 | 0.0431 (8) | 0.0493 (8) | 0.0803 (11) | −0.0071 (6) | 0.0261 (8) | 0.0016 (8) |
C8 | 0.0373 (7) | 0.0473 (8) | 0.0586 (9) | 0.0000 (6) | 0.0139 (6) | −0.0044 (6) |
C9 | 0.0379 (7) | 0.0440 (7) | 0.0437 (7) | 0.0003 (5) | 0.0162 (6) | −0.0008 (6) |
C10 | 0.0378 (6) | 0.0386 (7) | 0.0414 (7) | 0.0038 (5) | 0.0192 (5) | 0.0010 (5) |
C11 | 0.0418 (7) | 0.0358 (6) | 0.0290 (6) | −0.0019 (5) | 0.0121 (5) | −0.0027 (5) |
C12 | 0.0415 (7) | 0.0390 (6) | 0.0263 (6) | −0.0027 (5) | 0.0135 (5) | −0.0024 (5) |
C13 | 0.0460 (7) | 0.0379 (6) | 0.0329 (6) | −0.0023 (5) | 0.0158 (5) | −0.0040 (5) |
C14 | 0.0467 (7) | 0.0437 (7) | 0.0431 (7) | 0.0019 (6) | 0.0192 (6) | −0.0054 (6) |
C15 | 0.0452 (7) | 0.0524 (8) | 0.0439 (7) | −0.0053 (6) | 0.0209 (6) | −0.0090 (6) |
C16 | 0.0525 (8) | 0.0431 (7) | 0.0477 (8) | −0.0099 (6) | 0.0237 (6) | −0.0031 (6) |
C17 | 0.0471 (7) | 0.0386 (7) | 0.0374 (7) | −0.0031 (5) | 0.0170 (6) | −0.0002 (5) |
C18 | 0.0582 (9) | 0.0627 (10) | 0.0544 (10) | −0.0011 (8) | 0.0014 (8) | 0.0022 (7) |
C19 | 0.0629 (10) | 0.0782 (12) | 0.0547 (10) | −0.0117 (9) | 0.0035 (8) | −0.0099 (9) |
C20 | 0.0562 (8) | 0.0371 (7) | 0.0630 (9) | 0.0008 (6) | 0.0276 (7) | −0.0007 (6) |
C21 | 0.0526 (9) | 0.0698 (10) | 0.0793 (12) | −0.0065 (8) | 0.0358 (9) | −0.0094 (9) |
C22 | 0.0570 (9) | 0.0386 (7) | 0.0753 (11) | −0.0005 (6) | 0.0243 (8) | 0.0049 (7) |
O1—C11 | 1.2201 (15) | C13—C14 | 1.3916 (19) |
O2—C2 | 1.3696 (16) | C13—C20 | 1.5112 (18) |
O2—C18 | 1.4190 (18) | C14—C15 | 1.3858 (19) |
O3—C8 | 1.3650 (18) | C14—H14 | 0.9500 |
O3—C19 | 1.419 (2) | C15—C16 | 1.383 (2) |
C1—C2 | 1.3840 (18) | C15—C21 | 1.5087 (19) |
C1—C10 | 1.4296 (18) | C16—C17 | 1.3924 (19) |
C1—C11 | 1.4991 (16) | C16—H16 | 0.9500 |
C2—C3 | 1.4105 (18) | C17—C22 | 1.5111 (19) |
C3—C4 | 1.363 (2) | C18—H18A | 0.9800 |
C3—H3 | 0.9500 | C18—H18B | 0.9800 |
C4—C5 | 1.407 (2) | C18—H18C | 0.9800 |
C4—H4 | 0.9500 | C19—H19A | 0.9800 |
C5—C6 | 1.420 (2) | C19—H19B | 0.9800 |
C5—C10 | 1.4236 (18) | C19—H19C | 0.9800 |
C6—C7 | 1.352 (2) | C20—H20A | 0.9800 |
C6—H6 | 0.9500 | C20—H20B | 0.9800 |
C7—C8 | 1.412 (2) | C20—H20C | 0.9800 |
C7—H7 | 0.9500 | C21—H21A | 0.9800 |
C8—C9 | 1.3694 (19) | C21—H21B | 0.9800 |
C9—C10 | 1.4208 (18) | C21—H21C | 0.9800 |
C9—H9 | 0.9500 | C22—H22A | 0.9800 |
C11—C12 | 1.4982 (17) | C22—H22B | 0.9800 |
C12—C17 | 1.4051 (17) | C22—H22C | 0.9800 |
C12—C13 | 1.4056 (18) | ||
C2—O2—C18 | 118.01 (11) | C15—C14—H14 | 118.9 |
C8—O3—C19 | 117.79 (12) | C13—C14—H14 | 118.9 |
C2—C1—C10 | 119.75 (11) | C16—C15—C14 | 118.02 (12) |
C2—C1—C11 | 120.07 (11) | C16—C15—C21 | 121.52 (13) |
C10—C1—C11 | 120.17 (11) | C14—C15—C21 | 120.46 (13) |
O2—C2—C1 | 116.54 (11) | C15—C16—C17 | 122.36 (12) |
O2—C2—C3 | 122.23 (12) | C15—C16—H16 | 118.8 |
C1—C2—C3 | 121.16 (12) | C17—C16—H16 | 118.8 |
C4—C3—C2 | 119.46 (13) | C16—C17—C12 | 118.59 (12) |
C4—C3—H3 | 120.3 | C16—C17—C22 | 119.09 (12) |
C2—C3—H3 | 120.3 | C12—C17—C22 | 122.28 (12) |
C3—C4—C5 | 121.69 (12) | O2—C18—H18A | 109.5 |
C3—C4—H4 | 119.2 | O2—C18—H18B | 109.5 |
C5—C4—H4 | 119.2 | H18A—C18—H18B | 109.5 |
C4—C5—C6 | 121.78 (13) | O2—C18—H18C | 109.5 |
C4—C5—C10 | 119.41 (13) | H18A—C18—H18C | 109.5 |
C6—C5—C10 | 118.80 (13) | H18B—C18—H18C | 109.5 |
C7—C6—C5 | 121.20 (13) | O3—C19—H19A | 109.5 |
C7—C6—H6 | 119.4 | O3—C19—H19B | 109.5 |
C5—C6—H6 | 119.4 | H19A—C19—H19B | 109.5 |
C6—C7—C8 | 120.10 (14) | O3—C19—H19C | 109.5 |
C6—C7—H7 | 120.0 | H19A—C19—H19C | 109.5 |
C8—C7—H7 | 120.0 | H19B—C19—H19C | 109.5 |
O3—C8—C9 | 124.67 (14) | C13—C20—H20A | 109.5 |
O3—C8—C7 | 114.41 (13) | C13—C20—H20B | 109.5 |
C9—C8—C7 | 120.91 (14) | H20A—C20—H20B | 109.5 |
C8—C9—C10 | 120.13 (13) | C13—C20—H20C | 109.5 |
C8—C9—H9 | 119.9 | H20A—C20—H20C | 109.5 |
C10—C9—H9 | 119.9 | H20B—C20—H20C | 109.5 |
C9—C10—C5 | 118.84 (12) | C15—C21—H21A | 109.5 |
C9—C10—C1 | 122.61 (11) | C15—C21—H21B | 109.5 |
C5—C10—C1 | 118.49 (12) | H21A—C21—H21B | 109.5 |
O1—C11—C12 | 120.33 (11) | C15—C21—H21C | 109.5 |
O1—C11—C1 | 119.28 (11) | H21A—C21—H21C | 109.5 |
C12—C11—C1 | 120.39 (10) | H21B—C21—H21C | 109.5 |
C17—C12—C13 | 120.11 (12) | C17—C22—H22A | 109.5 |
C17—C12—C11 | 119.04 (11) | C17—C22—H22B | 109.5 |
C13—C12—C11 | 120.82 (11) | H22A—C22—H22B | 109.5 |
C14—C13—C12 | 118.76 (12) | C17—C22—H22C | 109.5 |
C14—C13—C20 | 118.30 (12) | H22A—C22—H22C | 109.5 |
C12—C13—C20 | 122.87 (12) | H22B—C22—H22C | 109.5 |
C15—C14—C13 | 122.15 (12) | ||
C18—O2—C2—C1 | 161.62 (13) | C11—C1—C10—C9 | −4.59 (18) |
C18—O2—C2—C3 | −21.32 (19) | C2—C1—C10—C5 | −0.93 (18) |
C10—C1—C2—O2 | 178.56 (11) | C11—C1—C10—C5 | 178.15 (11) |
C11—C1—C2—O2 | −0.52 (17) | C2—C1—C11—O1 | 130.97 (13) |
C10—C1—C2—C3 | 1.46 (19) | C10—C1—C11—O1 | −48.11 (17) |
C11—C1—C2—C3 | −177.62 (12) | C2—C1—C11—C12 | −49.47 (16) |
O2—C2—C3—C4 | −177.48 (12) | C10—C1—C11—C12 | 131.46 (12) |
C1—C2—C3—C4 | −0.5 (2) | O1—C11—C12—C17 | −46.12 (17) |
C2—C3—C4—C5 | −0.9 (2) | C1—C11—C12—C17 | 134.33 (12) |
C3—C4—C5—C6 | −177.78 (14) | O1—C11—C12—C13 | 131.78 (13) |
C3—C4—C5—C10 | 1.4 (2) | C1—C11—C12—C13 | −47.77 (16) |
C4—C5—C6—C7 | 178.76 (14) | C17—C12—C13—C14 | −1.15 (18) |
C10—C5—C6—C7 | −0.4 (2) | C11—C12—C13—C14 | −179.03 (11) |
C5—C6—C7—C8 | −0.8 (2) | C17—C12—C13—C20 | 175.68 (12) |
C19—O3—C8—C9 | 0.5 (2) | C11—C12—C13—C20 | −2.20 (18) |
C19—O3—C8—C7 | −179.03 (14) | C12—C13—C14—C15 | 0.25 (19) |
C6—C7—C8—O3 | −179.25 (14) | C20—C13—C14—C15 | −176.73 (13) |
C6—C7—C8—C9 | 1.2 (2) | C13—C14—C15—C16 | 0.8 (2) |
O3—C8—C9—C10 | −179.74 (12) | C13—C14—C15—C21 | −179.45 (13) |
C7—C8—C9—C10 | −0.2 (2) | C14—C15—C16—C17 | −1.0 (2) |
C8—C9—C10—C5 | −1.05 (19) | C21—C15—C16—C17 | 179.27 (13) |
C8—C9—C10—C1 | −178.31 (12) | C15—C16—C17—C12 | 0.1 (2) |
C4—C5—C10—C9 | −177.84 (12) | C15—C16—C17—C22 | −177.54 (13) |
C6—C5—C10—C9 | 1.38 (19) | C13—C12—C17—C16 | 0.97 (18) |
C4—C5—C10—C1 | −0.47 (18) | C11—C12—C17—C16 | 178.89 (11) |
C6—C5—C10—C1 | 178.75 (12) | C13—C12—C17—C22 | 178.55 (12) |
C2—C1—C10—C9 | 176.34 (11) | C11—C12—C17—C22 | −3.53 (19) |
D—H···A | D—H | H···A | D···A | D—H···A |
C4—H4···O1i | 0.95 | 2.54 | 3.3756 (18) | 147 |
C7—H7···O2ii | 0.95 | 2.60 | 3.466 (2) | 152 |
C9—H9···O1 | 0.95 | 2.39 | 2.9464 (17) | 117 |
C18—H18B···O3iii | 0.98 | 2.59 | 3.471 (2) | 149 |
C22—H22A···O1 | 0.98 | 2.51 | 2.885 (2) | 102 |
Symmetry codes: (i) x, −y+1/2, z−1/2; (ii) −x+1, y+1/2, −z+3/2; (iii) x−1, −y+1/2, z−1/2. |
Experimental details
Crystal data | |
Chemical formula | C22H22O3 |
Mr | 334.40 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 193 |
a, b, c (Å) | 10.5238 (4), 12.2289 (4), 15.0504 (5) |
β (°) | 111.340 (2) |
V (Å3) | 1804.11 (11) |
Z | 4 |
Radiation type | Cu Kα |
µ (mm−1) | 0.64 |
Crystal size (mm) | 0.50 × 0.40 × 0.20 |
Data collection | |
Diffractometer | Rigaku R-AXIS RAPID |
Absorption correction | Numerical (NUMABS; Higashi, 1999) |
Tmin, Tmax | 0.739, 0.882 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 32585, 3295, 2945 |
Rint | 0.023 |
(sin θ/λ)max (Å−1) | 0.602 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.039, 0.112, 1.08 |
No. of reflections | 3295 |
No. of parameters | 232 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.26, −0.25 |
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 | 2.54 | 3.3756 (18) | 147 |
C7—H7···O2ii | 0.95 | 2.60 | 3.466 (2) | 152 |
C9—H9···O1 | 0.95 | 2.39 | 2.9464 (17) | 117 |
C18—H18B···O3iii | 0.98 | 2.59 | 3.471 (2) | 149 |
C22—H22A···O1 | 0.98 | 2.51 | 2.885 (2) | 102 |
Symmetry codes: (i) x, −y+1/2, z−1/2; (ii) −x+1, y+1/2, −z+3/2; (iii) x−1, −y+1/2, z−1/2. |
Acknowledgements
The authors express their gratitude to Master Daichi Hijikata, Department of Organic and Polymer Materials Chemistry, Graduate School, Tokyo University of Agriculture and Technology, and Professor Keiichi Noguchi, Instrumentation Analysis Center, Tokyo University of Agriculture and Technology, for their technical advice.
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 acylation of 2,7-dimethoxynaphthalene, peri-arylcarbonylnaphthalene compounds have proven to be formed regioselectively with the aid of suitable acidic mediators (Okamoto & Yonezawa, 2009; Okamoto, Mitsui et al., 2011). Recently, we have reported the crystal structures of several 1,8-diarylcarbonylated naphthalene analogues exemplified by 1,8-bis(4-methylbenzoyl)-2,7-dimethoxynaphthalene (Muto et al., 2010). The arylcarbonyl groups at the 1,8-positions of the naphthalene rings in these compounds are connected in an almost perpendicular fashion. Besides, the crystal structures of arylcarbonylated naphthalene homologues, 1-monoarylcarbonylated naphthalene compounds and the β-isomers of 3-monoarylcarbonylated naphthalene compounds, have been also clarified such as (2,7-dimethoxynaphthalen-1-yl)(4-fluorophenyl)methanone (Watanabe et al., 2011) and (3,6-dimethoxy-2-naphthyl)(4-fluorobenzoyl)methanone (Watanabe, Muto, Nagasawa et al., 2010).
As a part of our continuing study on the molecular structures of these homologous molecules, the crystal structure of title compound, 1-monoarylcarbonylnaphthalene bearing three methyl groups on the arylcarbonyl group, is discussed in this report.
The molecular structure of the title compound is displayed in Fig. 1. The 2,4,6-trimethylphenyl group is out of the plane of the naphthalene ring. The dihedral angle between the best planes of the 2,4,6-trimethylphenyl ring (C12—C17) and the naphthalene ring (C1—C10) is 82.93 (5)°. The carbonyl group makes torsion angles of -130.97 (14) and -131.79 (13)°, respectively, with the naphthalene ring and the benzene ring [C2—C1—C11—O1 torsion angle = -130.97 (14)°; O1—C11—C12—C13 torsion angle = -131.79 (13)°]. In addition, two types of intramolecular C—H···O interactions are observed (C9—H9···O1 = 2.39 Å and C22—H22a···O1 = 2.51 Å; Fig. 1 and Table 1).
In the crystal structure, the molecular packing of the title compound is stabilized mainly by van der Waals interactions. The crystal packing is additionally stabilized by three types of C—H···O hydrogen bondings: Intermolecular C—H···O hydrogen bonding between the oxygen atom (O1) of the carbonyl group and one hydrogen atom (H4) of the naphthalene ring of the adjacent molecule is formed along the c axis (C4—H4···O1i; Fig. 2 and Table 1). There is also intermolecular C—H···O hydrogen bonding between the oxygen atom (O2) of 2-methoxy group and one hydrogen atom (H7) of the naphthalene ring of the adjacent molecule along the b axis (C7—H7···O2ii; Fig. 3 and Table 1). Furthermore, an intermolecular C—H···O hydrogen bonding between the oxygen atom (O3) of the 7-methoxy group and one hydrogen atom (H18b) of the 2-methoxy group of the adjacent molecule along the ac diagonal (C18—H18b···O3 iii; Fig. 4 and Table 1) is observed.