The title compound, C
15H
14O
4, also known as mansonone H, crystallizes in the space group
P2
12
12 with two molecules in the asymmetric unit. In both molecules, the tetrahydropyran ring adopts an envelope conformation and the attached methyl group occupies an axial position. In the crystal structure, symmetry-related molecules are linked by O—H
O and C—H
O hydrogen bonds, to form chains along the
a and
b axes. They are interlinked by C—H
O hydrogen bonds to form a network.
Supporting information
CCDC reference: 209986
Key indicators
- Single-crystal X-ray study
- T = 293 K
- Mean (C-C) = 0.004 Å
- R factor = 0.053
- wR factor = 0.148
- Data-to-parameter ratio = 9.5
checkCIF results
No syntax errors found
ADDSYM reports no extra symmetry
Alert Level C:
REFLT_03
From the CIF: _diffrn_reflns_theta_max 28.31
From the CIF: _reflns_number_total 3275
TEST2: Reflns within _diffrn_reflns_theta_max
Count of symmetry unique reflns 3515
Completeness (_total/calc) 93.17%
Alert C: < 95% complete
PLAT_213 Alert C Atom O4A has ADP max/min Ratio ........... 3.40 prolate
PLAT_369 Alert C Long C(sp2)-C(sp2) Bond C(8B) - C(9B) = 1.54 Ang.
General Notes
REFLT_03
From the CIF: _diffrn_reflns_theta_max 28.31
From the CIF: _reflns_number_total 3275
Count of symmetry unique reflns 3515
Completeness (_total/calc) 93.17%
TEST3: Check Friedels for noncentro structure
Estimate of Friedel pairs measured 0
Fraction of Friedel pairs measured 0.000
Are heavy atom types Z>Si present no
Please check that the estimate of the number of Friedel pairs is
correct. If it is not, please give the correct count in the
_publ_section_exptl_refinement section of the submitted CIF.
0 Alert Level A = Potentially serious problem
0 Alert Level B = Potential problem
3 Alert Level C = Please check
Dried powder obtained from the roots of Helicteres angustifolia was extracted with EtOH. The EtOH extract was concentrated in vacuo, and the residue was extracted with EtOAc. The soluble portion of the EtOAc extract was subjected to silica-gel column chromatography, eluting with chloroform/menthol, yielded the title compound, mansonone H, (I). The compound was confirmed by the NMR spectra. Crystals of (I) were obtained from chloroform/menthol by solvent diffusion. 1H NMR (500 MHz, DMSO-d6): δ 6.78 (s, H5), 3.19 (m, H9), 4.43 (dd, J = 1.5, 5.0 Hz, H2a), 4.29 (dd, J = 1.5, 5.0 Hz, H2b), 1.83 (s, H9), 2.51 (s, H6), 1.20 (d, J = 7.0 Hz, H3).
The H atoms were positioned geometrically and were treated as riding on their parent C and O atoms, with C—H distances in the range 0.93–0.98 Å and O—H distance of 0.82 Å. The reflections (001) and (110) were omitted during the refinement as they fit very badly. One of the anisotropic displacement parameters (U33) for the carbonyl atom O4A is large, indicating a possible disorder. Owing to a large fraction of weak data at higher angles, the completeness of tha data is slightly low. The Friedel opposites were merged during the refinement.
Data collection: SMART (Bruker, 1998); cell refinement: SAINT (Bruker, 1999); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Bruker, 1998); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL.
4-Hydroxy-3,6,9-trimethyl-2,3-dihydrobenzo[de]chromene-7,8-dione
top
Crystal data top
C15H14O4 | F(000) = 1088 |
Mr = 258.26 | Dx = 1.378 Mg m−3 |
Orthorhombic, P21212 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P 2 2ab | Cell parameters from 25 reflections |
a = 17.917 (1) Å | θ = 25–31° |
b = 18.126 (1) Å | µ = 0.10 mm−1 |
c = 7.668 (1) Å | T = 293 K |
V = 2490.3 (4) Å3 | Plate, red |
Z = 8 | 0.28 × 0.20 × 0.12 mm |
Data collection top
Bruker SMART CCD diffractometer | 2108 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.056 |
Graphite monochromator | θmax = 28.3°, θmin = 2.3° |
ω scans | h = −23→22 |
14655 measured reflections | k = −15→23 |
3275 independent reflections | l = −10→10 |
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)] = 0.053 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.148 | H-atom parameters constrained |
S = 1.00 | w = 1/[σ2(Fo2) + (0.0879P)2] where P = (Fo2 + 2Fc2)/3 |
3275 reflections | (Δ/σ)max < 0.001 |
344 parameters | Δρmax = 0.23 e Å−3 |
0 restraints | Δρmin = −0.21 e Å−3 |
Crystal data top
C15H14O4 | V = 2490.3 (4) Å3 |
Mr = 258.26 | Z = 8 |
Orthorhombic, P21212 | Mo Kα radiation |
a = 17.917 (1) Å | µ = 0.10 mm−1 |
b = 18.126 (1) Å | T = 293 K |
c = 7.668 (1) Å | 0.28 × 0.20 × 0.12 mm |
Data collection top
Bruker SMART CCD diffractometer | 2108 reflections with I > 2σ(I) |
14655 measured reflections | Rint = 0.056 |
3275 independent reflections | |
Refinement top
R[F2 > 2σ(F2)] = 0.053 | 0 restraints |
wR(F2) = 0.148 | H-atom parameters constrained |
S = 1.00 | Δρmax = 0.23 e Å−3 |
3275 reflections | Δρmin = −0.21 e Å−3 |
344 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. All H atoms were placed in calculated positions and refined as riding atoms. |
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top | x | y | z | Uiso*/Ueq | |
O1A | 0.15330 (11) | 0.50699 (11) | 0.0388 (4) | 0.0529 (7) | |
H1A | 0.1878 | 0.5367 | 0.0326 | 0.064* | |
O2A | 0.02737 (10) | 0.26301 (11) | −0.0102 (4) | 0.0501 (7) | |
O3A | 0.21760 (12) | 0.09143 (11) | −0.0064 (5) | 0.0635 (8) | |
O4A | 0.31836 (13) | 0.19491 (14) | −0.0393 (8) | 0.1137 (17) | |
C1A | 0.28303 (16) | 0.35125 (17) | 0.0013 (6) | 0.0451 (8) | |
C2A | 0.25568 (17) | 0.42257 (16) | 0.0183 (6) | 0.0441 (8) | |
H2A | 0.2894 | 0.4614 | 0.0278 | 0.053* | |
C3A | 0.18026 (16) | 0.43793 (15) | 0.0215 (5) | 0.0397 (8) | |
C4A | 0.12793 (15) | 0.38068 (15) | 0.0105 (5) | 0.0357 (7) | |
C5A | 0.15449 (15) | 0.30889 (15) | −0.0055 (5) | 0.0355 (7) | |
C6A | 0.10020 (15) | 0.24810 (15) | −0.0057 (5) | 0.0368 (7) | |
C7A | 0.11884 (16) | 0.17541 (16) | 0.0072 (5) | 0.0407 (8) | |
C8A | 0.19548 (16) | 0.15581 (16) | −0.0037 (6) | 0.0423 (8) | |
C9A | 0.25504 (17) | 0.21539 (17) | −0.0189 (7) | 0.0543 (10) | |
C10A | 0.23180 (15) | 0.29275 (16) | −0.0088 (6) | 0.0416 (8) | |
C11A | 0.36618 (16) | 0.3408 (2) | −0.0053 (8) | 0.0699 (13) | |
H11A | 0.3903 | 0.3880 | 0.0011 | 0.105* | |
H11B | 0.3796 | 0.3169 | −0.1126 | 0.105* | |
H11C | 0.3818 | 0.3109 | 0.0913 | 0.105* | |
C12A | 0.04522 (15) | 0.39532 (16) | 0.0200 (5) | 0.0406 (8) | |
H12A | 0.0353 | 0.4420 | −0.0403 | 0.049* | |
C13A | 0.00502 (18) | 0.33484 (16) | −0.0771 (5) | 0.0481 (9) | |
H13A | −0.0485 | 0.3409 | −0.0635 | 0.058* | |
H13B | 0.0167 | 0.3379 | −0.2004 | 0.058* | |
C14A | 0.0173 (2) | 0.4026 (2) | 0.2046 (5) | 0.0564 (10) | |
H14A | 0.0441 | 0.4414 | 0.2625 | 0.085* | |
H14B | 0.0251 | 0.3570 | 0.2655 | 0.085* | |
H14C | −0.0350 | 0.4141 | 0.2034 | 0.085* | |
C15A | 0.05877 (17) | 0.11781 (16) | 0.0249 (6) | 0.0532 (10) | |
H15A | 0.0262 | 0.1201 | −0.0744 | 0.080* | |
H15B | 0.0306 | 0.1268 | 0.1292 | 0.080* | |
H15C | 0.0812 | 0.0698 | 0.0312 | 0.080* | |
O1B | 0.00578 (11) | 0.15361 (12) | 0.5081 (4) | 0.0543 (7) | |
H1B | −0.0229 | 0.1879 | 0.4889 | 0.065* | |
O2B | 0.24898 (11) | 0.02368 (11) | 0.4260 (4) | 0.0539 (7) | |
O3B | 0.42882 (11) | 0.20679 (13) | 0.4607 (4) | 0.0594 (8) | |
O4B | 0.32678 (13) | 0.30978 (13) | 0.4978 (6) | 0.0781 (10) | |
C1B | 0.16801 (16) | 0.27748 (15) | 0.5045 (5) | 0.0393 (7) | |
C2B | 0.09484 (16) | 0.25227 (17) | 0.5101 (5) | 0.0425 (8) | |
H2B | 0.0564 | 0.2865 | 0.5208 | 0.051* | |
C3B | 0.07713 (15) | 0.17825 (17) | 0.5003 (5) | 0.0407 (7) | |
C4B | 0.13349 (16) | 0.12540 (15) | 0.4788 (5) | 0.0376 (8) | |
C5B | 0.20691 (16) | 0.14961 (16) | 0.4682 (5) | 0.0354 (8) | |
C6B | 0.26698 (16) | 0.09563 (16) | 0.4452 (5) | 0.0391 (8) | |
C7B | 0.34097 (17) | 0.11184 (17) | 0.4436 (5) | 0.0412 (8) | |
C8B | 0.36360 (16) | 0.18669 (18) | 0.4626 (5) | 0.0419 (8) | |
C9B | 0.30421 (16) | 0.24721 (17) | 0.4826 (6) | 0.0431 (8) | |
C10B | 0.22533 (15) | 0.22597 (16) | 0.4826 (5) | 0.0374 (7) | |
C11B | 0.18078 (19) | 0.35934 (17) | 0.5210 (7) | 0.0552 (10) | |
H11D | 0.1336 | 0.3842 | 0.5295 | 0.083* | |
H11E | 0.2072 | 0.3769 | 0.4202 | 0.083* | |
H11F | 0.2097 | 0.3692 | 0.6237 | 0.083* | |
C12B | 0.11541 (16) | 0.04380 (16) | 0.4685 (5) | 0.0425 (8) | |
H12B | 0.0678 | 0.0384 | 0.4067 | 0.051* | |
C13B | 0.17469 (17) | 0.00636 (19) | 0.3623 (5) | 0.0506 (9) | |
H13C | 0.1671 | −0.0466 | 0.3666 | 0.061* | |
H13D | 0.1704 | 0.0219 | 0.2417 | 0.061* | |
C14B | 0.1069 (2) | 0.0093 (2) | 0.6477 (6) | 0.0701 (12) | |
H14D | 0.0953 | −0.0421 | 0.6354 | 0.105* | |
H14E | 0.0673 | 0.0336 | 0.7095 | 0.105* | |
H14F | 0.1526 | 0.0147 | 0.7115 | 0.105* | |
C15B | 0.39940 (18) | 0.05296 (19) | 0.4155 (6) | 0.0547 (10) | |
H15D | 0.3923 | 0.0139 | 0.4985 | 0.082* | |
H15E | 0.4482 | 0.0740 | 0.4306 | 0.082* | |
H15F | 0.3949 | 0.0336 | 0.2994 | 0.082* | |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
O1A | 0.0405 (12) | 0.0181 (10) | 0.100 (2) | −0.0003 (9) | 0.0009 (14) | 0.0011 (14) |
O2A | 0.0257 (10) | 0.0260 (11) | 0.0987 (19) | 0.0006 (8) | −0.0043 (13) | −0.0045 (14) |
O3A | 0.0472 (12) | 0.0202 (11) | 0.123 (2) | 0.0076 (9) | 0.0027 (17) | −0.0009 (17) |
O4A | 0.0321 (13) | 0.0338 (14) | 0.275 (6) | 0.0087 (11) | 0.016 (2) | 0.002 (3) |
C1A | 0.0301 (14) | 0.0261 (15) | 0.079 (3) | −0.0023 (12) | −0.0070 (19) | 0.004 (2) |
C2A | 0.0359 (16) | 0.0227 (14) | 0.074 (2) | −0.0054 (12) | −0.0027 (18) | 0.0024 (18) |
C3A | 0.0368 (15) | 0.0205 (14) | 0.062 (2) | −0.0011 (12) | 0.0007 (17) | 0.0042 (17) |
C4A | 0.0312 (14) | 0.0209 (14) | 0.055 (2) | −0.0005 (11) | −0.0035 (16) | 0.0061 (16) |
C5A | 0.0302 (14) | 0.0218 (14) | 0.0545 (19) | 0.0003 (11) | −0.0038 (16) | 0.0017 (17) |
C6A | 0.0293 (14) | 0.0233 (14) | 0.058 (2) | 0.0015 (11) | −0.0011 (17) | 0.0015 (17) |
C7A | 0.0319 (15) | 0.0222 (13) | 0.068 (2) | −0.0035 (12) | −0.0029 (17) | −0.0019 (18) |
C8A | 0.0363 (15) | 0.0199 (13) | 0.071 (2) | 0.0052 (12) | −0.0020 (18) | −0.0003 (19) |
C9A | 0.0298 (15) | 0.0272 (15) | 0.106 (3) | 0.0047 (13) | 0.000 (2) | 0.004 (2) |
C10A | 0.0286 (14) | 0.0232 (14) | 0.073 (2) | −0.0012 (12) | 0.0005 (18) | 0.0034 (19) |
C11A | 0.0295 (16) | 0.042 (2) | 0.139 (4) | −0.0051 (15) | 0.002 (3) | 0.006 (3) |
C12A | 0.0337 (15) | 0.0225 (14) | 0.066 (2) | 0.0037 (12) | −0.0027 (17) | 0.0054 (17) |
C13A | 0.0324 (16) | 0.0273 (17) | 0.084 (3) | 0.0071 (14) | −0.0089 (17) | −0.0004 (18) |
C14A | 0.052 (2) | 0.046 (2) | 0.072 (3) | 0.0059 (18) | 0.0054 (19) | −0.006 (2) |
C15A | 0.0382 (16) | 0.0236 (15) | 0.098 (3) | −0.0043 (13) | −0.002 (2) | −0.002 (2) |
O1B | 0.0264 (10) | 0.0365 (12) | 0.100 (2) | −0.0003 (9) | 0.0027 (15) | −0.0013 (17) |
O2B | 0.0351 (12) | 0.0198 (11) | 0.107 (2) | 0.0011 (9) | −0.0023 (13) | −0.0008 (12) |
O3B | 0.0277 (11) | 0.0444 (13) | 0.106 (2) | −0.0056 (10) | −0.0010 (13) | −0.0059 (15) |
O4B | 0.0440 (13) | 0.0292 (13) | 0.161 (3) | −0.0094 (10) | 0.002 (2) | −0.012 (2) |
C1B | 0.0380 (15) | 0.0206 (14) | 0.059 (2) | 0.0013 (12) | −0.0033 (18) | −0.0002 (18) |
C2B | 0.0347 (15) | 0.0275 (15) | 0.065 (2) | 0.0077 (12) | 0.0017 (18) | −0.0062 (18) |
C3B | 0.0284 (14) | 0.0333 (15) | 0.060 (2) | −0.0007 (13) | −0.0011 (17) | 0.0003 (19) |
C4B | 0.0321 (14) | 0.0241 (15) | 0.057 (2) | −0.0010 (12) | −0.0003 (16) | −0.0007 (16) |
C5B | 0.0289 (14) | 0.0239 (14) | 0.053 (2) | 0.0006 (12) | −0.0026 (14) | 0.0018 (16) |
C6B | 0.0304 (15) | 0.0230 (15) | 0.064 (2) | 0.0018 (12) | −0.0006 (15) | 0.0013 (16) |
C7B | 0.0291 (15) | 0.0311 (16) | 0.063 (2) | 0.0016 (13) | −0.0015 (14) | 0.0050 (17) |
C8B | 0.0271 (15) | 0.0339 (17) | 0.065 (2) | −0.0012 (13) | 0.0007 (15) | 0.0014 (18) |
C9B | 0.0350 (16) | 0.0266 (15) | 0.068 (2) | −0.0022 (13) | −0.0012 (17) | 0.0011 (18) |
C10B | 0.0311 (14) | 0.0265 (15) | 0.055 (2) | −0.0018 (12) | −0.0032 (16) | 0.0002 (17) |
C11B | 0.0502 (19) | 0.0236 (15) | 0.092 (3) | 0.0010 (14) | −0.002 (2) | −0.001 (2) |
C12B | 0.0322 (15) | 0.0251 (15) | 0.070 (2) | −0.0039 (12) | −0.0034 (17) | −0.0049 (17) |
C13B | 0.0375 (17) | 0.0252 (17) | 0.089 (3) | −0.0014 (15) | −0.0050 (18) | −0.0108 (19) |
C14B | 0.080 (3) | 0.039 (2) | 0.091 (3) | −0.011 (2) | 0.006 (2) | 0.011 (2) |
C15B | 0.0332 (17) | 0.0374 (19) | 0.093 (3) | 0.0081 (15) | −0.0010 (18) | 0.001 (2) |
Geometric parameters (Å, º) top
O1A—C3A | 1.348 (3) | O1B—C3B | 1.355 (3) |
O1A—H1A | 0.82 | O1B—H1B | 0.82 |
O2A—C6A | 1.333 (3) | O2B—C6B | 1.351 (4) |
O2A—C13A | 1.455 (4) | O2B—C13B | 1.452 (4) |
O3A—C8A | 1.233 (3) | O3B—C8B | 1.224 (3) |
O4A—C9A | 1.204 (4) | O4B—C9B | 1.210 (4) |
C1A—C2A | 1.389 (4) | C1B—C2B | 1.389 (4) |
C1A—C10A | 1.405 (4) | C1B—C10B | 1.398 (4) |
C1A—C11A | 1.503 (4) | C1B—C11B | 1.507 (4) |
C2A—C3A | 1.380 (4) | C2B—C3B | 1.381 (4) |
C2A—H2A | 0.93 | C2B—H2B | 0.93 |
C3A—C4A | 1.401 (4) | C3B—C4B | 1.402 (4) |
C4A—C5A | 1.391 (4) | C4B—C5B | 1.389 (4) |
C4A—C12A | 1.507 (4) | C4B—C12B | 1.516 (4) |
C5A—C10A | 1.416 (4) | C5B—C10B | 1.427 (4) |
C5A—C6A | 1.470 (4) | C5B—C6B | 1.465 (4) |
C6A—C7A | 1.363 (4) | C6B—C7B | 1.358 (4) |
C7A—C8A | 1.421 (4) | C7B—C8B | 1.424 (4) |
C7A—C15A | 1.506 (4) | C7B—C15B | 1.510 (5) |
C8A—C9A | 1.523 (4) | C8B—C9B | 1.536 (4) |
C9A—C10A | 1.465 (4) | C9B—C10B | 1.465 (4) |
C11A—H11A | 0.96 | C11B—H11D | 0.96 |
C11A—H11B | 0.96 | C11B—H11E | 0.96 |
C11A—H11C | 0.96 | C11B—H11F | 0.96 |
C12A—C14A | 1.507 (5) | C12B—C13B | 1.500 (5) |
C12A—C13A | 1.508 (4) | C12B—C14B | 1.517 (6) |
C12A—H12A | 0.98 | C12B—H12B | 0.98 |
C13A—H13A | 0.97 | C13B—H13C | 0.97 |
C13A—H13B | 0.97 | C13B—H13D | 0.97 |
C14A—H14A | 0.96 | C14B—H14D | 0.96 |
C14A—H14B | 0.96 | C14B—H14E | 0.96 |
C14A—H14C | 0.96 | C14B—H14F | 0.96 |
C15A—H15A | 0.96 | C15B—H15D | 0.96 |
C15A—H15B | 0.96 | C15B—H15E | 0.96 |
C15A—H15C | 0.96 | C15B—H15F | 0.96 |
| | | |
C3A—O1A—H1A | 109.5 | C3B—O1B—H1B | 109.5 |
C6A—O2A—C13A | 117.4 (2) | C6B—O2B—C13B | 117.7 (2) |
C2A—C1A—C10A | 118.5 (3) | C2B—C1B—C10B | 118.5 (3) |
C2A—C1A—C11A | 118.0 (3) | C2B—C1B—C11B | 117.7 (3) |
C10A—C1A—C11A | 123.5 (3) | C10B—C1B—C11B | 123.8 (3) |
C3A—C2A—C1A | 122.3 (3) | C3B—C2B—C1B | 122.3 (3) |
C3A—C2A—H2A | 118.8 | C3B—C2B—H2B | 118.8 |
C1A—C2A—H2A | 118.8 | C1B—C2B—H2B | 118.8 |
O1A—C3A—C2A | 122.7 (3) | O1B—C3B—C2B | 122.3 (3) |
O1A—C3A—C4A | 117.0 (2) | O1B—C3B—C4B | 117.3 (3) |
C2A—C3A—C4A | 120.3 (3) | C2B—C3B—C4B | 120.3 (3) |
C5A—C4A—C3A | 118.0 (2) | C5B—C4B—C3B | 118.2 (3) |
C5A—C4A—C12A | 120.4 (2) | C5B—C4B—C12B | 120.5 (3) |
C3A—C4A—C12A | 121.6 (2) | C3B—C4B—C12B | 121.3 (3) |
C4A—C5A—C10A | 122.0 (2) | C4B—C5B—C10B | 121.4 (3) |
C4A—C5A—C6A | 118.4 (2) | C4B—C5B—C6B | 119.4 (3) |
C10A—C5A—C6A | 119.5 (2) | C10B—C5B—C6B | 119.1 (3) |
O2A—C6A—C7A | 116.0 (2) | O2B—C6B—C7B | 116.2 (3) |
O2A—C6A—C5A | 119.7 (2) | O2B—C6B—C5B | 118.8 (2) |
C7A—C6A—C5A | 124.2 (2) | C7B—C6B—C5B | 125.0 (3) |
C6A—C7A—C8A | 118.3 (3) | C6B—C7B—C8B | 118.9 (3) |
C6A—C7A—C15A | 120.1 (3) | C6B—C7B—C15B | 121.7 (3) |
C8A—C7A—C15A | 121.5 (3) | C8B—C7B—C15B | 119.4 (3) |
O3A—C8A—C7A | 123.3 (3) | O3B—C8B—C7B | 123.7 (3) |
O3A—C8A—C9A | 116.4 (3) | O3B—C8B—C9B | 116.7 (3) |
C7A—C8A—C9A | 120.3 (3) | C7B—C8B—C9B | 119.6 (3) |
O4A—C9A—C10A | 124.7 (3) | O4B—C9B—C10B | 124.7 (3) |
O4A—C9A—C8A | 116.9 (3) | O4B—C9B—C8B | 116.6 (3) |
C10A—C9A—C8A | 118.4 (2) | C10B—C9B—C8B | 118.7 (3) |
C1A—C10A—C5A | 118.8 (3) | C1B—C10B—C5B | 119.1 (3) |
C1A—C10A—C9A | 122.7 (3) | C1B—C10B—C9B | 122.2 (3) |
C5A—C10A—C9A | 118.5 (2) | C5B—C10B—C9B | 118.6 (3) |
C1A—C11A—H11A | 109.5 | C1B—C11B—H11D | 109.5 |
C1A—C11A—H11B | 109.5 | C1B—C11B—H11E | 109.5 |
H11A—C11A—H11B | 109.5 | H11D—C11B—H11E | 109.5 |
C1A—C11A—H11C | 109.5 | C1B—C11B—H11F | 109.5 |
H11A—C11A—H11C | 109.5 | H11D—C11B—H11F | 109.5 |
H11B—C11A—H11C | 109.5 | H11E—C11B—H11F | 109.5 |
C14A—C12A—C4A | 112.8 (3) | C13B—C12B—C4B | 108.6 (3) |
C14A—C12A—C13A | 111.7 (3) | C13B—C12B—C14B | 112.1 (3) |
C4A—C12A—C13A | 108.5 (3) | C4B—C12B—C14B | 112.1 (3) |
C14A—C12A—H12A | 107.9 | C13B—C12B—H12B | 108.0 |
C4A—C12A—H12A | 107.9 | C4B—C12B—H12B | 108.0 |
C13A—C12A—H12A | 107.9 | C14B—C12B—H12B | 108.0 |
O2A—C13A—C12A | 110.2 (3) | O2B—C13B—C12B | 111.6 (3) |
O2A—C13A—H13A | 109.6 | O2B—C13B—H13C | 109.3 |
C12A—C13A—H13A | 109.6 | C12B—C13B—H13C | 109.3 |
O2A—C13A—H13B | 109.6 | O2B—C13B—H13D | 109.3 |
C12A—C13A—H13B | 109.6 | C12B—C13B—H13D | 109.3 |
H13A—C13A—H13B | 108.1 | H13C—C13B—H13D | 108.0 |
C12A—C14A—H14A | 109.5 | C12B—C14B—H14D | 109.5 |
C12A—C14A—H14B | 109.5 | C12B—C14B—H14E | 109.5 |
H14A—C14A—H14B | 109.5 | H14D—C14B—H14E | 109.5 |
C12A—C14A—H14C | 109.5 | C12B—C14B—H14F | 109.5 |
H14A—C14A—H14C | 109.5 | H14D—C14B—H14F | 109.5 |
H14B—C14A—H14C | 109.5 | H14E—C14B—H14F | 109.5 |
C7A—C15A—H15A | 109.5 | C7B—C15B—H15D | 109.5 |
C7A—C15A—H15B | 109.5 | C7B—C15B—H15E | 109.5 |
H15A—C15A—H15B | 109.5 | H15D—C15B—H15E | 109.5 |
C7A—C15A—H15C | 109.5 | C7B—C15B—H15F | 109.5 |
H15A—C15A—H15C | 109.5 | H15D—C15B—H15F | 109.5 |
H15B—C15A—H15C | 109.5 | H15E—C15B—H15F | 109.5 |
| | | |
C10A—C1A—C2A—C3A | −1.5 (7) | C10B—C1B—C2B—C3B | 2.1 (6) |
C11A—C1A—C2A—C3A | 178.5 (4) | C11B—C1B—C2B—C3B | −178.5 (4) |
C1A—C2A—C3A—O1A | 179.6 (4) | C1B—C2B—C3B—O1B | 179.1 (4) |
C1A—C2A—C3A—C4A | 1.1 (7) | C1B—C2B—C3B—C4B | −1.9 (6) |
O1A—C3A—C4A—C5A | −179.3 (3) | O1B—C3B—C4B—C5B | 179.2 (3) |
C2A—C3A—C4A—C5A | −0.7 (6) | C2B—C3B—C4B—C5B | 0.2 (6) |
O1A—C3A—C4A—C12A | −0.8 (6) | O1B—C3B—C4B—C12B | −1.2 (5) |
C2A—C3A—C4A—C12A | 177.8 (4) | C2B—C3B—C4B—C12B | 179.7 (4) |
C3A—C4A—C5A—C10A | 0.8 (6) | C3B—C4B—C5B—C10B | 1.4 (6) |
C12A—C4A—C5A—C10A | −177.8 (4) | C12B—C4B—C5B—C10B | −178.2 (3) |
C3A—C4A—C5A—C6A | 176.1 (3) | C3B—C4B—C5B—C6B | −179.8 (3) |
C12A—C4A—C5A—C6A | −2.4 (6) | C12B—C4B—C5B—C6B | 0.6 (5) |
C13A—O2A—C6A—C7A | −161.4 (3) | C13B—O2B—C6B—C7B | −157.4 (3) |
C13A—O2A—C6A—C5A | 21.8 (5) | C13B—O2B—C6B—C5B | 23.4 (5) |
C4A—C5A—C6A—O2A | 7.4 (6) | C4B—C5B—C6B—O2B | 3.3 (5) |
C10A—C5A—C6A—O2A | −177.1 (4) | C10B—C5B—C6B—O2B | −177.9 (3) |
C4A—C5A—C6A—C7A | −169.2 (4) | C4B—C5B—C6B—C7B | −175.8 (4) |
C10A—C5A—C6A—C7A | 6.3 (6) | C10B—C5B—C6B—C7B | 3.0 (6) |
O2A—C6A—C7A—C8A | 174.3 (3) | O2B—C6B—C7B—C8B | 179.7 (3) |
C5A—C6A—C7A—C8A | −9.0 (6) | C5B—C6B—C7B—C8B | −1.1 (6) |
O2A—C6A—C7A—C15A | −3.2 (6) | O2B—C6B—C7B—C15B | 2.1 (5) |
C5A—C6A—C7A—C15A | 173.5 (4) | C5B—C6B—C7B—C15B | −178.7 (3) |
C6A—C7A—C8A—O3A | −174.5 (4) | C6B—C7B—C8B—O3B | −179.1 (4) |
C15A—C7A—C8A—O3A | 3.0 (7) | C15B—C7B—C8B—O3B | −1.4 (6) |
C6A—C7A—C8A—C9A | 3.4 (6) | C6B—C7B—C8B—C9B | −0.6 (6) |
C15A—C7A—C8A—C9A | −179.1 (4) | C15B—C7B—C8B—C9B | 177.1 (3) |
O3A—C8A—C9A—O4A | 2.9 (7) | O3B—C8B—C9B—O4B | −1.2 (6) |
C7A—C8A—C9A—O4A | −175.1 (5) | C7B—C8B—C9B—O4B | −179.8 (4) |
O3A—C8A—C9A—C10A | −177.4 (4) | O3B—C8B—C9B—C10B | 179.0 (4) |
C7A—C8A—C9A—C10A | 4.5 (7) | C7B—C8B—C9B—C10B | 0.4 (6) |
C2A—C1A—C10A—C5A | 1.5 (6) | C2B—C1B—C10B—C5B | −0.5 (6) |
C11A—C1A—C10A—C5A | −178.5 (4) | C11B—C1B—C10B—C5B | −179.9 (4) |
C2A—C1A—C10A—C9A | −177.2 (4) | C2B—C1B—C10B—C9B | −177.4 (4) |
C11A—C1A—C10A—C9A | 2.9 (7) | C11B—C1B—C10B—C9B | 3.2 (6) |
C4A—C5A—C10A—C1A | −1.1 (7) | C4B—C5B—C10B—C1B | −1.2 (6) |
C6A—C5A—C10A—C1A | −176.5 (4) | C6B—C5B—C10B—C1B | 180.0 (3) |
C4A—C5A—C10A—C9A | 177.6 (4) | C4B—C5B—C10B—C9B | 175.8 (3) |
C6A—C5A—C10A—C9A | 2.2 (6) | C6B—C5B—C10B—C9B | −3.0 (5) |
O4A—C9A—C10A—C1A | −8.8 (8) | O4B—C9B—C10B—C1B | −1.4 (7) |
C8A—C9A—C10A—C1A | 171.5 (4) | C8B—C9B—C10B—C1B | 178.4 (4) |
O4A—C9A—C10A—C5A | 172.5 (5) | O4B—C9B—C10B—C5B | −178.3 (4) |
C8A—C9A—C10A—C5A | −7.1 (6) | C8B—C9B—C10B—C5B | 1.5 (6) |
C5A—C4A—C12A—C14A | 96.0 (4) | C5B—C4B—C12B—C13B | −28.1 (5) |
C3A—C4A—C12A—C14A | −82.5 (4) | C3B—C4B—C12B—C13B | 152.4 (3) |
C5A—C4A—C12A—C13A | −28.3 (5) | C5B—C4B—C12B—C14B | 96.3 (4) |
C3A—C4A—C12A—C13A | 153.2 (4) | C3B—C4B—C12B—C14B | −83.3 (4) |
C6A—O2A—C13A—C12A | −53.9 (4) | C6B—O2B—C13B—C12B | −52.8 (4) |
C14A—C12A—C13A—O2A | −70.7 (3) | C4B—C12B—C13B—O2B | 52.1 (4) |
C4A—C12A—C13A—O2A | 54.2 (4) | C14B—C12B—C13B—O2B | −72.3 (4) |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
O1A—H1A···O3Ai | 0.82 | 1.97 | 2.785 (3) | 169 |
O1B—H1B···O3Bii | 0.82 | 2.13 | 2.892 (3) | 154 |
C2A—H2A···O3Ai | 0.93 | 2.37 | 3.099 (4) | 136 |
C2B—H2B···O3Bii | 0.93 | 2.29 | 3.074 (4) | 141 |
C13B—H13D···O3A | 0.97 | 2.43 | 3.311 (5) | 150 |
C15A—H15C···O3A | 0.96 | 2.49 | 2.896 (4) | 105 |
C15B—H15E···O3B | 0.96 | 2.44 | 2.859 (4) | 106 |
C13A—H13A···O4Aiii | 0.97 | 2.59 | 3.503 (4) | 156 |
Symmetry codes: (i) −x+1/2, y+1/2, −z; (ii) x−1/2, −y+1/2, −z+1; (iii) x−1/2, −y+1/2, −z. |
Experimental details
Crystal data |
Chemical formula | C15H14O4 |
Mr | 258.26 |
Crystal system, space group | Orthorhombic, P21212 |
Temperature (K) | 293 |
a, b, c (Å) | 17.917 (1), 18.126 (1), 7.668 (1) |
V (Å3) | 2490.3 (4) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.10 |
Crystal size (mm) | 0.28 × 0.20 × 0.12 |
|
Data collection |
Diffractometer | Bruker SMART CCD diffractometer |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 14655, 3275, 2108 |
Rint | 0.056 |
(sin θ/λ)max (Å−1) | 0.667 |
|
Refinement |
R[F2 > 2σ(F2)], wR(F2), S | 0.053, 0.148, 1.00 |
No. of reflections | 3275 |
No. of parameters | 344 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.23, −0.21 |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
O1A—H1A···O3Ai | 0.82 | 1.97 | 2.785 (3) | 169 |
O1B—H1B···O3Bii | 0.82 | 2.13 | 2.892 (3) | 154 |
C2A—H2A···O3Ai | 0.93 | 2.37 | 3.099 (4) | 136 |
C2B—H2B···O3Bii | 0.93 | 2.29 | 3.074 (4) | 141 |
C13B—H13D···O3A | 0.97 | 2.43 | 3.311 (5) | 150 |
Symmetry codes: (i) −x+1/2, y+1/2, −z; (ii) x−1/2, −y+1/2, −z+1. |
Mansonone H, (I), was isolated from the roots of Helicteres angustifolia (Sterculiaceae) known as anti-inflammatory and antitumour medicine (Jiangsu New Medical Colleges, 1986). This cadinane sesquiterpenoid quinine has been previously isolated from the wood sawdust of Mansonia altissima Chev (Tanaka et al., 1966), the root bark of Ulmus davidiana (Kim et al., 1996) and the heartwood of Mansonia gagei Drumm (Tiew et al., 2002). The structure of (I) was previously elucidated on the basis of spectroscopic analysis. Herein, we report the crystal structure of (I).
The X-ray study of (I) confirms the previously proposed molecular structure based on spectroscopic data (Fig. 1). The asymmetric unit of (I) consists of two independent molecules, A and B, linked by a C13B—H13D···O3A hydrogen bond (Table 1). Bond lengths and angles observed in these two molecules agree with each other, but a large deviation is observed in the corresponding torsion angles about the C4—C12 bond. The C8A—C9A [1.523 (4) Å] and C8B—C9B [1.536 (4) Å] bond lengths are longer than the mean value of 1.478 (12) Å reported for unconjugated Csp2—Csp2 bonds by Allen et al. (1987). In both molecules, the tetrahydropyran ring adopts an envelope conformation and the methyl group occupies an axial position.
In the crystal, symmetry-related A molecules are linked by O1A—H1A···O3Ai and C2A—H2A···O3Aii hydrogen bonds, forming chains along the b axis. Similarly, symmetry-related B molecules are linked by O1B—H1B···O3Bi and C2B—H2B···O3Bii hydrogen bonds, forming chains along the a axis (symmetry codes are as in Table 1). The chains formed by molecules A and B are arranged alternately and C13B—H13D···O3A hydrogen bonds link them to form a network (Fig. 2).