The title compound, C
18H
16O
5, a flavone, was isolated from the rhizomes of
Kaempferia parviflora. The phenyl substituent is twisted away from the plane of the benzopyran-4-one ring system by 31.05 (4)°. The crystal structure is stabilized by π–π stacking interactions between the benzopyran-4-one ring system of inversion-related molecules stacked along the
a axis and C—H
O interactions between the screw-related molecules.
Supporting information
CCDC reference: 290007
Key indicators
- Single-crystal X-ray study
- T = 100 K
- Mean (C-C) = 0.002 Å
- R factor = 0.042
- wR factor = 0.111
- Data-to-parameter ratio = 20.5
checkCIF/PLATON results
No syntax errors found
Alert level C
PLAT066_ALERT_1_C Predicted and Reported Transmissions Identical . ?
PLAT094_ALERT_2_C Ratio of Maximum / Minimum Residual Density .... 2.16
0 ALERT level A = In general: serious problem
0 ALERT level B = Potentially serious problem
2 ALERT level C = Check and explain
0 ALERT level G = General alerts; check
1 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
1 ALERT type 2 Indicator that the structure model may be wrong or deficient
0 ALERT type 3 Indicator that the structure quality may be low
0 ALERT type 4 Improvement, methodology, query or suggestion
Data collection: APEX2 (Bruker, 2005); cell refinement: APEX2; data reduction: SAINT (Bruker, 2005); program(s) used to solve structure: SHELXTL (Sheldrick, 1998); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2003).
3,5,7-trimethoxy-2-phenyl-4
H-1-benzopyran-4-one
top
Crystal data top
C18H16O5 | F(000) = 656 |
Mr = 312.31 | Dx = 1.408 Mg m−3 |
Monoclinic, P21/c | Melting point = 476–477 K |
Hall symbol: -P 2ybc | Mo Kα radiation, λ = 0.71073 Å |
a = 7.4026 (2) Å | Cell parameters from 5703 reflections |
b = 18.4985 (4) Å | θ = 2.2–30.1° |
c = 11.4109 (2) Å | µ = 0.10 mm−1 |
β = 109.466 (1)° | T = 100 K |
V = 1473.26 (6) Å3 | Block, colourless |
Z = 4 | 0.58 × 0.30 × 0.22 mm |
Data collection top
Bruker SMART APEX-2 CCD area-detector with Oxford Cyrosystems Cobra
low-temperature attachment diffractometer | 4323 independent reflections |
Radiation source: fine-focus sealed tube | 3718 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.027 |
Detector resolution: 8.33 pixels mm-1 | θmax = 30.1°, θmin = 2.2° |
ω scans | h = −10→10 |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | k = −26→26 |
Tmin = 0.964, Tmax = 0.978 | l = −16→16 |
27408 measured reflections | |
Refinement top
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.042 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.111 | H-atom parameters constrained |
S = 1.06 | w = 1/[σ2(Fo2) + (0.054P)2 + 0.5096P] where P = (Fo2 + 2Fc2)/3 |
4323 reflections | (Δ/σ)max = 0.001 |
211 parameters | Δρmax = 0.44 e Å−3 |
0 restraints | Δρmin = −0.20 e Å−3 |
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 | |
O1 | 0.86678 (11) | 0.39286 (4) | 0.48193 (6) | 0.01615 (16) | |
O2 | 0.67054 (12) | 0.52789 (4) | 0.18461 (7) | 0.02273 (18) | |
O3 | 0.78003 (12) | 0.38991 (4) | 0.15078 (7) | 0.02204 (18) | |
O4 | 0.57397 (12) | 0.62108 (4) | 0.33569 (7) | 0.02214 (18) | |
O5 | 0.72816 (12) | 0.55707 (4) | 0.75880 (7) | 0.02117 (17) | |
C1 | 0.72141 (14) | 0.50762 (5) | 0.40082 (9) | 0.01562 (19) | |
C2 | 0.65075 (15) | 0.57440 (6) | 0.43141 (10) | 0.0173 (2) | |
C3 | 0.65707 (15) | 0.58849 (6) | 0.55125 (10) | 0.0178 (2) | |
H3 | 0.6101 | 0.6321 | 0.5697 | 0.021* | |
C4 | 0.73417 (15) | 0.53732 (6) | 0.64558 (9) | 0.0171 (2) | |
C5 | 0.80702 (15) | 0.47229 (5) | 0.62123 (9) | 0.01627 (19) | |
H5 | 0.8609 | 0.4388 | 0.6840 | 0.020* | |
C6 | 0.79632 (14) | 0.45903 (5) | 0.49866 (9) | 0.01492 (19) | |
C7 | 0.85753 (14) | 0.37034 (5) | 0.36575 (9) | 0.01533 (19) | |
C8 | 0.78323 (15) | 0.41362 (6) | 0.26554 (9) | 0.0169 (2) | |
C9 | 0.71915 (15) | 0.48765 (6) | 0.27597 (9) | 0.0170 (2) | |
C10 | 0.93817 (15) | 0.29726 (5) | 0.36940 (9) | 0.01576 (19) | |
C11 | 0.92161 (16) | 0.24703 (6) | 0.45692 (10) | 0.0195 (2) | |
H11 | 0.8573 | 0.2597 | 0.5114 | 0.023* | |
C12 | 1.00047 (18) | 0.17831 (6) | 0.46315 (10) | 0.0222 (2) | |
H12 | 0.9875 | 0.1451 | 0.5210 | 0.027* | |
C13 | 1.09867 (17) | 0.15920 (6) | 0.38290 (10) | 0.0209 (2) | |
H13 | 1.1520 | 0.1133 | 0.3873 | 0.025* | |
C14 | 1.11673 (16) | 0.20892 (6) | 0.29614 (10) | 0.0210 (2) | |
H14 | 1.1822 | 0.1962 | 0.2424 | 0.025* | |
C15 | 1.03773 (16) | 0.27748 (6) | 0.28924 (10) | 0.0189 (2) | |
H15 | 1.0509 | 0.3105 | 0.2311 | 0.023* | |
C16 | 0.58954 (18) | 0.38279 (6) | 0.06168 (10) | 0.0247 (2) | |
H16A | 0.5961 | 0.3585 | −0.0112 | 0.037* | |
H16B | 0.5344 | 0.4299 | 0.0393 | 0.037* | |
H16C | 0.5115 | 0.3552 | 0.0977 | 0.037* | |
C17 | 0.49941 (19) | 0.68785 (6) | 0.36346 (12) | 0.0286 (3) | |
H17A | 0.4499 | 0.7160 | 0.2889 | 0.043* | |
H17B | 0.5998 | 0.7143 | 0.4235 | 0.043* | |
H17C | 0.3985 | 0.6781 | 0.3966 | 0.043* | |
C18 | 0.79792 (18) | 0.50531 (7) | 0.85730 (10) | 0.0242 (2) | |
H18A | 0.7790 | 0.5235 | 0.9311 | 0.036* | |
H18B | 0.9320 | 0.4971 | 0.8732 | 0.036* | |
H18C | 0.7294 | 0.4607 | 0.8334 | 0.036* | |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
O1 | 0.0192 (4) | 0.0145 (3) | 0.0149 (3) | 0.0020 (3) | 0.0059 (3) | −0.0004 (2) |
O2 | 0.0264 (4) | 0.0208 (4) | 0.0205 (4) | 0.0003 (3) | 0.0072 (3) | 0.0062 (3) |
O3 | 0.0235 (4) | 0.0292 (4) | 0.0140 (3) | 0.0053 (3) | 0.0071 (3) | 0.0008 (3) |
O4 | 0.0254 (4) | 0.0169 (4) | 0.0253 (4) | 0.0056 (3) | 0.0099 (3) | 0.0058 (3) |
O5 | 0.0231 (4) | 0.0211 (4) | 0.0182 (3) | 0.0036 (3) | 0.0054 (3) | −0.0032 (3) |
C1 | 0.0131 (4) | 0.0160 (4) | 0.0180 (4) | −0.0012 (3) | 0.0056 (4) | 0.0011 (3) |
C2 | 0.0135 (4) | 0.0164 (5) | 0.0219 (5) | −0.0007 (4) | 0.0055 (4) | 0.0023 (4) |
C3 | 0.0151 (5) | 0.0150 (4) | 0.0233 (5) | −0.0002 (4) | 0.0062 (4) | −0.0021 (4) |
C4 | 0.0136 (4) | 0.0184 (5) | 0.0185 (4) | −0.0023 (4) | 0.0045 (4) | −0.0037 (4) |
C5 | 0.0144 (4) | 0.0167 (4) | 0.0164 (4) | −0.0006 (4) | 0.0034 (4) | −0.0006 (3) |
C6 | 0.0127 (4) | 0.0141 (4) | 0.0181 (4) | −0.0010 (3) | 0.0052 (3) | −0.0010 (3) |
C7 | 0.0141 (4) | 0.0174 (4) | 0.0152 (4) | −0.0012 (4) | 0.0058 (3) | −0.0011 (3) |
C8 | 0.0159 (5) | 0.0200 (5) | 0.0156 (4) | 0.0006 (4) | 0.0064 (4) | 0.0007 (4) |
C9 | 0.0142 (4) | 0.0183 (5) | 0.0184 (4) | −0.0023 (4) | 0.0055 (4) | 0.0024 (4) |
C10 | 0.0155 (4) | 0.0161 (4) | 0.0151 (4) | −0.0007 (4) | 0.0044 (3) | −0.0017 (3) |
C11 | 0.0239 (5) | 0.0190 (5) | 0.0184 (4) | 0.0011 (4) | 0.0110 (4) | −0.0002 (4) |
C12 | 0.0307 (6) | 0.0174 (5) | 0.0212 (5) | 0.0020 (4) | 0.0121 (4) | 0.0016 (4) |
C13 | 0.0247 (5) | 0.0171 (5) | 0.0207 (5) | 0.0021 (4) | 0.0072 (4) | −0.0029 (4) |
C14 | 0.0228 (5) | 0.0219 (5) | 0.0205 (5) | 0.0014 (4) | 0.0103 (4) | −0.0031 (4) |
C15 | 0.0207 (5) | 0.0198 (5) | 0.0181 (4) | −0.0005 (4) | 0.0089 (4) | 0.0001 (4) |
C16 | 0.0281 (6) | 0.0259 (6) | 0.0176 (5) | 0.0011 (5) | 0.0042 (4) | 0.0000 (4) |
C17 | 0.0327 (6) | 0.0203 (5) | 0.0346 (6) | 0.0087 (5) | 0.0137 (5) | 0.0057 (5) |
C18 | 0.0275 (6) | 0.0263 (5) | 0.0172 (5) | 0.0047 (5) | 0.0054 (4) | −0.0022 (4) |
Geometric parameters (Å, º) top
O1—C6 | 1.3686 (12) | C10—C11 | 1.3990 (14) |
O1—C7 | 1.3695 (11) | C10—C15 | 1.4010 (14) |
O2—C9 | 1.2331 (12) | C11—C12 | 1.3906 (15) |
O3—C8 | 1.3737 (12) | C11—H11 | 0.93 |
O3—C16 | 1.4436 (14) | C12—C13 | 1.3913 (15) |
O4—C2 | 1.3594 (12) | C12—H12 | 0.93 |
O4—C17 | 1.4308 (14) | C13—C14 | 1.3900 (15) |
O5—C4 | 1.3574 (12) | C13—H13 | 0.93 |
O5—C18 | 1.4352 (14) | C14—C15 | 1.3878 (15) |
C1—C6 | 1.3961 (14) | C14—H14 | 0.93 |
C1—C2 | 1.4293 (14) | C15—H15 | 0.93 |
C1—C9 | 1.4665 (14) | C16—H16A | 0.96 |
C2—C3 | 1.3775 (14) | C16—H16B | 0.96 |
C3—C4 | 1.4039 (15) | C16—H16C | 0.96 |
C3—H3 | 0.93 | C17—H17A | 0.96 |
C4—C5 | 1.3838 (14) | C17—H17B | 0.96 |
C5—C6 | 1.3961 (14) | C17—H17C | 0.96 |
C5—H5 | 0.93 | C18—H18A | 0.96 |
C7—C8 | 1.3535 (14) | C18—H18B | 0.96 |
C7—C10 | 1.4728 (14) | C18—H18C | 0.96 |
C8—C9 | 1.4670 (15) | | |
| | | |
C6—O1—C7 | 120.58 (8) | C12—C11—C10 | 120.56 (10) |
C8—O3—C16 | 113.77 (8) | C12—C11—H11 | 119.7 |
C2—O4—C17 | 117.34 (9) | C10—C11—H11 | 119.7 |
C4—O5—C18 | 116.65 (8) | C11—C12—C13 | 120.07 (10) |
C6—C1—C2 | 116.19 (9) | C11—C12—H12 | 120.0 |
C6—C1—C9 | 119.18 (9) | C13—C12—H12 | 120.0 |
C2—C1—C9 | 124.64 (9) | C14—C13—C12 | 119.74 (10) |
O4—C2—C3 | 122.97 (10) | C14—C13—H13 | 120.1 |
O4—C2—C1 | 116.22 (9) | C12—C13—H13 | 120.1 |
C3—C2—C1 | 120.79 (9) | C15—C14—C13 | 120.42 (10) |
C2—C3—C4 | 120.28 (10) | C15—C14—H14 | 119.8 |
C2—C3—H3 | 119.9 | C13—C14—H14 | 119.8 |
C4—C3—H3 | 119.9 | C14—C15—C10 | 120.33 (10) |
O5—C4—C5 | 124.30 (9) | C14—C15—H15 | 119.8 |
O5—C4—C3 | 114.49 (9) | C10—C15—H15 | 119.8 |
C5—C4—C3 | 121.21 (9) | O3—C16—H16A | 109.5 |
C4—C5—C6 | 117.26 (9) | O3—C16—H16B | 109.5 |
C4—C5—H5 | 121.4 | H16A—C16—H16B | 109.5 |
C6—C5—H5 | 121.4 | O3—C16—H16C | 109.5 |
O1—C6—C5 | 113.57 (9) | H16A—C16—H16C | 109.5 |
O1—C6—C1 | 122.18 (9) | H16B—C16—H16C | 109.5 |
C5—C6—C1 | 124.25 (9) | O4—C17—H17A | 109.5 |
C8—C7—O1 | 120.86 (9) | O4—C17—H17B | 109.5 |
C8—C7—C10 | 127.85 (9) | H17A—C17—H17B | 109.5 |
O1—C7—C10 | 111.28 (8) | O4—C17—H17C | 109.5 |
C7—C8—O3 | 119.31 (9) | H17A—C17—H17C | 109.5 |
C7—C8—C9 | 122.34 (9) | H17B—C17—H17C | 109.5 |
O3—C8—C9 | 118.17 (9) | O5—C18—H18A | 109.5 |
O2—C9—C1 | 125.09 (10) | O5—C18—H18B | 109.5 |
O2—C9—C8 | 120.41 (9) | H18A—C18—H18B | 109.5 |
C1—C9—C8 | 114.50 (9) | O5—C18—H18C | 109.5 |
C11—C10—C15 | 118.88 (10) | H18A—C18—H18C | 109.5 |
C11—C10—C7 | 119.91 (9) | H18B—C18—H18C | 109.5 |
C15—C10—C7 | 121.17 (9) | | |
| | | |
C17—O4—C2—C3 | 0.76 (15) | C10—C7—C8—O3 | −0.65 (17) |
C17—O4—C2—C1 | 179.03 (10) | O1—C7—C8—C9 | 3.51 (16) |
C6—C1—C2—O4 | −178.62 (9) | C10—C7—C8—C9 | −175.72 (10) |
C9—C1—C2—O4 | 1.15 (15) | C16—O3—C8—C7 | 117.65 (11) |
C6—C1—C2—C3 | −0.31 (15) | C16—O3—C8—C9 | −67.07 (12) |
C9—C1—C2—C3 | 179.46 (10) | C6—C1—C9—O2 | −174.17 (10) |
O4—C2—C3—C4 | 178.47 (9) | C2—C1—C9—O2 | 6.07 (17) |
C1—C2—C3—C4 | 0.28 (16) | C6—C1—C9—C8 | 5.15 (14) |
C18—O5—C4—C5 | −1.80 (15) | C2—C1—C9—C8 | −174.61 (9) |
C18—O5—C4—C3 | 177.47 (9) | C7—C8—C9—O2 | 172.59 (10) |
C2—C3—C4—O5 | −178.61 (9) | O3—C8—C9—O2 | −2.54 (15) |
C2—C3—C4—C5 | 0.68 (16) | C7—C8—C9—C1 | −6.76 (15) |
O5—C4—C5—C6 | 177.69 (9) | O3—C8—C9—C1 | 178.11 (9) |
C3—C4—C5—C6 | −1.53 (15) | C8—C7—C10—C11 | −148.30 (11) |
C7—O1—C6—C5 | 176.70 (9) | O1—C7—C10—C11 | 32.40 (13) |
C7—O1—C6—C1 | −3.22 (14) | C8—C7—C10—C15 | 33.91 (16) |
C4—C5—C6—O1 | −178.38 (9) | O1—C7—C10—C15 | −145.38 (10) |
C4—C5—C6—C1 | 1.54 (15) | C15—C10—C11—C12 | −0.84 (16) |
C2—C1—C6—O1 | 179.28 (9) | C7—C10—C11—C12 | −178.67 (10) |
C9—C1—C6—O1 | −0.50 (15) | C10—C11—C12—C13 | 0.70 (17) |
C2—C1—C6—C5 | −0.63 (15) | C11—C12—C13—C14 | −0.33 (17) |
C9—C1—C6—C5 | 179.59 (9) | C12—C13—C14—C15 | 0.10 (17) |
C6—O1—C7—C8 | 1.72 (14) | C13—C14—C15—C10 | −0.25 (16) |
C6—O1—C7—C10 | −178.93 (8) | C11—C10—C15—C14 | 0.61 (16) |
O1—C7—C8—O3 | 178.58 (9) | C7—C10—C15—C14 | 178.42 (10) |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
C12—H12···O3i | 0.93 | 2.55 | 3.3419 (15) | 144 |
C13—H13···O2ii | 0.93 | 2.37 | 3.2077 (14) | 150 |
C15—H15···O3 | 0.93 | 2.41 | 2.9072 (14) | 114 |
C16—H16B···O2 | 0.96 | 2.44 | 2.9952 (13) | 117 |
Symmetry codes: (i) x, −y+1/2, z+1/2; (ii) −x+2, y−1/2, −z+1/2. |