Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536812010410/im2356sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S1600536812010410/im2356Isup5.hkl | |
Chemical Markup Language (CML) file https://doi.org/10.1107/S1600536812010410/im2356Isup3.cml |
CCDC reference: 849113
Key indicators
- Single-crystal X-ray study
- T = 295 K
- Mean (C-C) = 0.003 Å
- R factor = 0.051
- wR factor = 0.157
- Data-to-parameter ratio = 18.2
checkCIF/PLATON results
No syntax errors found
Alert level B PLAT029_ALERT_3_B _diffrn_measured_fraction_theta_full Low ....... 0.950
Alert level C PLAT910_ALERT_3_C Missing # of FCF Reflections Below Th(Min) ..... 2 PLAT911_ALERT_3_C Missing # FCF Refl Between THmin & STh/L= 0.600 149 PLAT912_ALERT_4_C Missing # of FCF Reflections Above STh/L= 0.600 123
Alert level G PLAT005_ALERT_5_G No _iucr_refine_instructions_details in CIF .... ? PLAT007_ALERT_5_G Note: Number of Unrefined D-H Atoms ............ 1 PLAT793_ALERT_4_G The Model has Chirality at C7 (Verify) .... S
0 ALERT level A = Most likely a serious problem - resolve or explain 1 ALERT level B = A potentially serious problem, consider carefully 3 ALERT level C = Check. Ensure it is not caused by an omission or oversight 3 ALERT level G = General information/check it is not something unexpected 0 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 0 ALERT type 2 Indicator that the structure model may be wrong or deficient 3 ALERT type 3 Indicator that the structure quality may be low 2 ALERT type 4 Improvement, methodology, query or suggestion 2 ALERT type 5 Informative message, check
The title compound was prepared in two stages (Vang & Stankevich, 1960). In the first stage, a mixture of 4-hydroxy-3,5-dimethoxybenzaldehyde (0.5 g, 8 m mol), 5,5-dimethylcyclohexane-1,3-dione (1.15 g, 1.6 mmol) and 10 ml of ethanol was heated to 70°C for about 10 minutes. The reaction mixture was allowed to cool to room temperature and the resulting solid intermediate 2,2'-((4-hydroxy-3,5-dimethoxyphenyl)methylene)bis(3-hydroxy-5,5-dimethylcyclohex-2-enone) was filtered and dried. In the second stage, about 0.5 g of this intermediate were dissolved in 25 ml of ethanol. The content was refluxed together with 15 drops of concentrated hydrochloric acid for 30 minutes with the reaction being monitored by TLC. After completion of the reaction, the reaction mixture was poured into crushed ice and stirred well. The solid separated was filtered, dried and then recrystallized from ethanol to yield colourless crystals of t he title compound (m.p. 490–492 K; yield: 85%).
All hydrogen atoms of the title compound were identified from the difference electron map and subsequently treated as riding atoms with distances of d(C–H) = 0.96 Å (for CH3) with Uiso(H) = 1.5 Ueq(C), d(C–H) = 0.97 Å (for CH2) with Uiso(H) = 1.2 Ueq(C), d(C–H) = 0.98 Å (for CH) with Uiso(H) = 1.5 Ueq(C) and d(C–H) = 0.93 Å (for aromatic CH) with Uiso(H) = 1.2 Ueq(C). The hydroxyl hydrogen atom was also identified from the difference electron map and was allowed to ride on the parent O atom with d(O–H) = 0.82 Å and Uiso(H) = 1.5 Ueq(O).
Xanthene is the parent compound of a number of naturally occurring substances and some synthetic dyes. Xanthene derivatives are used as dyes (Hilderbrand & Weissleder, 2007) and they possess biological properties like antibacterial, antiviral, anti-inflammatory (Jonathan et al., 1988) activities and are therefore used in medicine. Ehretianone, a quinonoid xanthene was reported to possess antisnake venom activity (Selvanayagam et al., 1996; Lambert et al., 1997; Poupelin et al., 1978; Hideo, 1981).
In the title compound (I), the cyclohexenone rings C1–C6 and C8–C13 both adopt an envelope conformation. In contrast, the pyran ring (O1/C1/C6/C8/C13) is almost planar with a slight deviation of C7 (0.99 Å) from the (C8/C13/O1/C1/C6) plane. The pyran ring and phenyl ring are almost perpendicular to one another making a dihedral angle of 86.32 (2)°. The bond lengths and angles are consistent with the reported structure (Odabasoglu et al., 2008; Mehdi et al., 2011). In the crystal structure, a relatively short intermolecular O5—H5···O2 hydrogen bond leads to the observation of centrosymmetrical dimers.
For the synthesis of xanthenes, see: Vang & Stankevich (1960); Hilderbrand & Weissleder (2007). For their pharmaceutical properties, see: Lambert et al. (1997); Poupelin et al. (1978); Hideo (1981); Selvanayagam et al. (1996); Jonathan et al. (1988). For related structures, see Mehdi et al. (2011); Odabasoglu et al. (2008). For the assignment of ring conformations, see: Cremer & Pople (1975).
Data collection: APEX2 (Bruker, 2004); cell refinement: APEX2 and SAINT (Bruker, 2004); data reduction: SAINT and XPREP (Bruker, 2004); program(s) used to solve structure: SIR92 (Altomare et al., 1993); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and Mercury (Macrae et al., 2008); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).
C25H30O6 | Z = 2 |
Mr = 426.49 | F(000) = 456 |
Triclinic, P1 | Dx = 1.274 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 9.4268 (9) Å | Cell parameters from 5637 reflections |
b = 10.2468 (10) Å | θ = 2.4–27.5° |
c = 12.6122 (11) Å | µ = 0.09 mm−1 |
α = 84.973 (6)° | T = 295 K |
β = 70.377 (5)° | Block, colourless |
γ = 75.676 (6)° | 0.30 × 0.25 × 0.20 mm |
V = 1111.83 (18) Å3 |
Bruker Kappa APEXII CCD diffractometer | 5233 independent reflections |
Radiation source: fine-focus sealed tube | 2876 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.052 |
ω and φ scan | θmax = 28.3°, θmin = 2.4° |
Absorption correction: multi-scan (SADABS; Bruker, 2004) | h = −12→12 |
Tmin = 0.924, Tmax = 0.982 | k = −13→13 |
20849 measured reflections | l = −16→16 |
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)] = 0.051 | H-atom parameters constrained |
wR(F2) = 0.157 | w = 1/[σ2(Fo2) + (0.0666P)2 + 0.3374P] where P = (Fo2 + 2Fc2)/3 |
S = 0.98 | (Δ/σ)max < 0.001 |
5233 reflections | Δρmax = 0.28 e Å−3 |
288 parameters | Δρmin = −0.21 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: 0.008 (2) |
C25H30O6 | γ = 75.676 (6)° |
Mr = 426.49 | V = 1111.83 (18) Å3 |
Triclinic, P1 | Z = 2 |
a = 9.4268 (9) Å | Mo Kα radiation |
b = 10.2468 (10) Å | µ = 0.09 mm−1 |
c = 12.6122 (11) Å | T = 295 K |
α = 84.973 (6)° | 0.30 × 0.25 × 0.20 mm |
β = 70.377 (5)° |
Bruker Kappa APEXII CCD diffractometer | 5233 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2004) | 2876 reflections with I > 2σ(I) |
Tmin = 0.924, Tmax = 0.982 | Rint = 0.052 |
20849 measured reflections |
R[F2 > 2σ(F2)] = 0.051 | 0 restraints |
wR(F2) = 0.157 | H-atom parameters constrained |
S = 0.98 | Δρmax = 0.28 e Å−3 |
5233 reflections | Δρmin = −0.21 e Å−3 |
288 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 | ||
C1 | 0.2424 (2) | 0.1023 (2) | 0.33354 (14) | 0.0336 (5) | |
C2 | 0.1297 (3) | 0.0482 (2) | 0.30200 (15) | 0.0418 (5) | |
H2A | 0.0310 | 0.0657 | 0.3621 | 0.050* | |
H2B | 0.1666 | −0.0486 | 0.2923 | 0.050* | |
C3 | 0.1076 (3) | 0.1131 (2) | 0.19256 (16) | 0.0466 (6) | |
C4 | 0.2682 (3) | 0.0985 (3) | 0.10508 (16) | 0.0509 (6) | |
H4A | 0.3068 | 0.0052 | 0.0814 | 0.061* | |
H4B | 0.2577 | 0.1524 | 0.0398 | 0.061* | |
C5 | 0.3873 (2) | 0.1383 (2) | 0.14149 (15) | 0.0381 (5) | |
C6 | 0.3614 (2) | 0.1462 (2) | 0.26230 (14) | 0.0337 (5) | |
C7 | 0.4681 (2) | 0.2063 (2) | 0.29943 (14) | 0.0354 (5) | |
H7 | 0.5748 | 0.1561 | 0.2636 | 0.042* | |
C8 | 0.4297 (2) | 0.1905 (2) | 0.42567 (15) | 0.0367 (5) | |
C9 | 0.5320 (3) | 0.2232 (2) | 0.47906 (17) | 0.0471 (6) | |
C10 | 0.4874 (3) | 0.2148 (3) | 0.60591 (17) | 0.0525 (6) | |
H10A | 0.5232 | 0.2833 | 0.6315 | 0.063* | |
H10B | 0.5411 | 0.1279 | 0.6263 | 0.063* | |
C11 | 0.3143 (3) | 0.2328 (2) | 0.66833 (16) | 0.0451 (6) | |
C12 | 0.2551 (3) | 0.1381 (2) | 0.61580 (15) | 0.0427 (5) | |
H12A | 0.2915 | 0.0464 | 0.6383 | 0.051* | |
H12B | 0.1429 | 0.1598 | 0.6446 | 0.051* | |
C13 | 0.3068 (2) | 0.1463 (2) | 0.49008 (14) | 0.0349 (5) | |
C14 | 0.0234 (3) | 0.2601 (3) | 0.2129 (2) | 0.0638 (7) | |
H14A | 0.0834 | 0.3068 | 0.2375 | 0.096* | |
H14B | −0.0758 | 0.2663 | 0.2698 | 0.096* | |
H14C | 0.0094 | 0.3002 | 0.1443 | 0.096* | |
C15 | 0.0135 (4) | 0.0391 (3) | 0.1523 (2) | 0.0787 (9) | |
H15A | −0.0879 | 0.0488 | 0.2070 | 0.118* | |
H15B | 0.0644 | −0.0547 | 0.1429 | 0.118* | |
H15C | 0.0047 | 0.0765 | 0.0817 | 0.118* | |
C16 | 0.2298 (3) | 0.3783 (3) | 0.6599 (2) | 0.0667 (7) | |
H16A | 0.2408 | 0.4010 | 0.5825 | 0.100* | |
H16B | 0.2731 | 0.4365 | 0.6893 | 0.100* | |
H16C | 0.1220 | 0.3895 | 0.7026 | 0.100* | |
C17 | 0.2863 (3) | 0.1950 (3) | 0.79273 (17) | 0.0620 (7) | |
H17A | 0.3218 | 0.2549 | 0.8271 | 0.093* | |
H17B | 0.3419 | 0.1041 | 0.7987 | 0.093* | |
H17C | 0.1776 | 0.2025 | 0.8303 | 0.093* | |
C19 | 0.4554 (2) | 0.3532 (2) | 0.26216 (15) | 0.0356 (5) | |
C20 | 0.5677 (2) | 0.3897 (2) | 0.16956 (15) | 0.0386 (5) | |
H20 | 0.6574 | 0.3259 | 0.1343 | 0.046* | |
C21 | 0.5475 (2) | 0.5199 (2) | 0.12944 (15) | 0.0395 (5) | |
C22 | 0.4165 (2) | 0.6183 (2) | 0.18321 (16) | 0.0401 (5) | |
C23 | 0.3081 (2) | 0.5825 (2) | 0.27940 (16) | 0.0401 (5) | |
C24 | 0.3262 (2) | 0.4511 (2) | 0.31724 (15) | 0.0402 (5) | |
H24 | 0.2510 | 0.4279 | 0.3804 | 0.048* | |
C25 | 0.7846 (3) | 0.4710 (3) | −0.02256 (19) | 0.0637 (7) | |
H25A | 0.8480 | 0.4413 | 0.0246 | 0.096* | |
H25B | 0.8412 | 0.5123 | −0.0894 | 0.096* | |
H25C | 0.7565 | 0.3952 | −0.0428 | 0.096* | |
C26 | 0.1124 (3) | 0.6717 (3) | 0.44614 (19) | 0.0619 (7) | |
H26A | 0.0458 | 0.6106 | 0.4588 | 0.093* | |
H26B | 0.0524 | 0.7580 | 0.4775 | 0.093* | |
H26C | 0.1899 | 0.6371 | 0.4815 | 0.093* | |
O1 | 0.21042 (15) | 0.10108 (15) | 0.44842 (10) | 0.0387 (4) | |
O2 | 0.50511 (17) | 0.16061 (16) | 0.07249 (11) | 0.0510 (4) | |
O3 | 0.6537 (2) | 0.2498 (2) | 0.42231 (14) | 0.0770 (6) | |
O4 | 0.18392 (19) | 0.68547 (17) | 0.33083 (12) | 0.0575 (5) | |
O5 | 0.39109 (19) | 0.74774 (16) | 0.14607 (12) | 0.0555 (5) | |
H5 | 0.4487 | 0.7521 | 0.0813 | 0.073 (9)* | |
O6 | 0.64868 (18) | 0.56614 (16) | 0.03654 (12) | 0.0530 (4) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0421 (11) | 0.0337 (13) | 0.0199 (9) | −0.0064 (9) | −0.0053 (8) | 0.0003 (7) |
C2 | 0.0538 (13) | 0.0461 (15) | 0.0271 (10) | −0.0215 (11) | −0.0090 (9) | 0.0029 (9) |
C3 | 0.0586 (14) | 0.0583 (17) | 0.0297 (11) | −0.0259 (13) | −0.0163 (10) | 0.0083 (9) |
C4 | 0.0692 (15) | 0.0593 (17) | 0.0239 (10) | −0.0193 (13) | −0.0115 (10) | −0.0005 (9) |
C5 | 0.0487 (12) | 0.0331 (13) | 0.0237 (9) | −0.0060 (10) | −0.0028 (9) | −0.0005 (8) |
C6 | 0.0393 (11) | 0.0327 (12) | 0.0232 (9) | −0.0061 (9) | −0.0047 (8) | 0.0018 (7) |
C7 | 0.0339 (10) | 0.0413 (13) | 0.0235 (9) | −0.0062 (9) | −0.0024 (8) | 0.0024 (8) |
C8 | 0.0402 (11) | 0.0398 (14) | 0.0252 (9) | −0.0066 (10) | −0.0068 (8) | 0.0025 (8) |
C9 | 0.0458 (13) | 0.0583 (17) | 0.0372 (11) | −0.0162 (12) | −0.0113 (10) | 0.0029 (10) |
C10 | 0.0585 (14) | 0.0681 (18) | 0.0382 (12) | −0.0219 (13) | −0.0209 (11) | 0.0044 (10) |
C11 | 0.0577 (14) | 0.0515 (16) | 0.0275 (10) | −0.0153 (12) | −0.0139 (9) | 0.0006 (9) |
C12 | 0.0507 (13) | 0.0514 (15) | 0.0238 (9) | −0.0152 (11) | −0.0083 (9) | 0.0050 (9) |
C13 | 0.0396 (11) | 0.0395 (13) | 0.0230 (9) | −0.0082 (9) | −0.0081 (8) | 0.0028 (8) |
C14 | 0.0564 (15) | 0.067 (2) | 0.0646 (16) | −0.0124 (14) | −0.0213 (13) | 0.0180 (13) |
C15 | 0.103 (2) | 0.117 (3) | 0.0458 (14) | −0.067 (2) | −0.0367 (15) | 0.0168 (14) |
C16 | 0.0893 (19) | 0.054 (2) | 0.0497 (14) | −0.0081 (15) | −0.0184 (13) | −0.0075 (12) |
C17 | 0.0836 (18) | 0.080 (2) | 0.0302 (11) | −0.0318 (16) | −0.0193 (12) | 0.0020 (11) |
C19 | 0.0387 (11) | 0.0428 (14) | 0.0248 (9) | −0.0140 (10) | −0.0070 (8) | 0.0025 (8) |
C20 | 0.0378 (11) | 0.0470 (15) | 0.0287 (10) | −0.0140 (10) | −0.0055 (8) | 0.0012 (9) |
C21 | 0.0462 (12) | 0.0481 (15) | 0.0247 (10) | −0.0206 (11) | −0.0064 (9) | 0.0047 (9) |
C22 | 0.0519 (13) | 0.0386 (14) | 0.0315 (10) | −0.0147 (11) | −0.0140 (9) | 0.0054 (9) |
C23 | 0.0441 (12) | 0.0416 (15) | 0.0308 (10) | −0.0077 (10) | −0.0088 (9) | −0.0005 (9) |
C24 | 0.0423 (12) | 0.0449 (15) | 0.0264 (10) | −0.0136 (10) | −0.0009 (8) | 0.0045 (8) |
C25 | 0.0559 (15) | 0.077 (2) | 0.0435 (13) | −0.0255 (14) | 0.0073 (11) | 0.0093 (12) |
C26 | 0.0513 (14) | 0.066 (2) | 0.0489 (14) | 0.0000 (13) | 0.0002 (11) | −0.0063 (12) |
O1 | 0.0433 (8) | 0.0533 (10) | 0.0188 (6) | −0.0185 (7) | −0.0048 (6) | 0.0037 (6) |
O2 | 0.0561 (9) | 0.0598 (12) | 0.0250 (7) | −0.0165 (8) | 0.0044 (7) | 0.0004 (6) |
O3 | 0.0588 (11) | 0.1335 (19) | 0.0502 (10) | −0.0510 (12) | −0.0144 (9) | 0.0094 (10) |
O4 | 0.0634 (10) | 0.0447 (11) | 0.0443 (9) | 0.0036 (8) | −0.0047 (8) | 0.0056 (7) |
O5 | 0.0733 (11) | 0.0444 (11) | 0.0366 (9) | −0.0133 (9) | −0.0053 (8) | 0.0110 (7) |
O6 | 0.0582 (10) | 0.0533 (11) | 0.0370 (8) | −0.0234 (8) | 0.0034 (7) | 0.0084 (7) |
C1—C6 | 1.330 (2) | C14—H14A | 0.9600 |
C1—O1 | 1.377 (2) | C14—H14B | 0.9600 |
C1—C2 | 1.486 (3) | C14—H14C | 0.9600 |
C2—C3 | 1.534 (3) | C15—H15A | 0.9600 |
C2—H2A | 0.9700 | C15—H15B | 0.9600 |
C2—H2B | 0.9700 | C15—H15C | 0.9600 |
C3—C14 | 1.518 (3) | C16—H16A | 0.9600 |
C3—C15 | 1.524 (3) | C16—H16B | 0.9600 |
C3—C4 | 1.525 (3) | C16—H16C | 0.9600 |
C4—C5 | 1.498 (3) | C17—H17A | 0.9600 |
C4—H4A | 0.9700 | C17—H17B | 0.9600 |
C4—H4B | 0.9700 | C17—H17C | 0.9600 |
C5—O2 | 1.218 (2) | C19—C20 | 1.383 (2) |
C5—C6 | 1.466 (2) | C19—C24 | 1.386 (3) |
C6—C7 | 1.511 (3) | C20—C21 | 1.376 (3) |
C7—C8 | 1.513 (2) | C20—H20 | 0.9300 |
C7—C19 | 1.525 (3) | C21—O6 | 1.373 (2) |
C7—H7 | 0.9800 | C21—C22 | 1.394 (3) |
C8—C13 | 1.331 (3) | C22—O5 | 1.358 (2) |
C8—C9 | 1.460 (3) | C22—C23 | 1.388 (3) |
C9—O3 | 1.213 (2) | C23—C24 | 1.378 (3) |
C9—C10 | 1.512 (3) | C23—O4 | 1.379 (3) |
C10—C11 | 1.527 (3) | C24—H24 | 0.9300 |
C10—H10A | 0.9700 | C25—O6 | 1.419 (3) |
C10—H10B | 0.9700 | C25—H25A | 0.9600 |
C11—C16 | 1.520 (3) | C25—H25B | 0.9600 |
C11—C12 | 1.523 (3) | C25—H25C | 0.9600 |
C11—C17 | 1.532 (3) | C26—O4 | 1.394 (3) |
C12—C13 | 1.495 (2) | C26—H26A | 0.9600 |
C12—H12A | 0.9700 | C26—H26B | 0.9600 |
C12—H12B | 0.9700 | C26—H26C | 0.9600 |
C13—O1 | 1.374 (2) | O5—H5 | 0.8200 |
C6—C1—O1 | 122.65 (17) | O1—C13—C12 | 110.98 (15) |
C6—C1—C2 | 125.82 (16) | C3—C14—H14A | 109.5 |
O1—C1—C2 | 111.53 (15) | C3—C14—H14B | 109.5 |
C1—C2—C3 | 111.07 (16) | H14A—C14—H14B | 109.5 |
C1—C2—H2A | 109.4 | C3—C14—H14C | 109.5 |
C3—C2—H2A | 109.4 | H14A—C14—H14C | 109.5 |
C1—C2—H2B | 109.4 | H14B—C14—H14C | 109.5 |
C3—C2—H2B | 109.4 | C3—C15—H15A | 109.5 |
H2A—C2—H2B | 108.0 | C3—C15—H15B | 109.5 |
C14—C3—C15 | 109.6 (2) | H15A—C15—H15B | 109.5 |
C14—C3—C4 | 111.30 (18) | C3—C15—H15C | 109.5 |
C15—C3—C4 | 109.35 (19) | H15A—C15—H15C | 109.5 |
C14—C3—C2 | 109.76 (18) | H15B—C15—H15C | 109.5 |
C15—C3—C2 | 109.56 (18) | C11—C16—H16A | 109.5 |
C4—C3—C2 | 107.25 (18) | C11—C16—H16B | 109.5 |
C5—C4—C3 | 116.38 (16) | H16A—C16—H16B | 109.5 |
C5—C4—H4A | 108.2 | C11—C16—H16C | 109.5 |
C3—C4—H4A | 108.2 | H16A—C16—H16C | 109.5 |
C5—C4—H4B | 108.2 | H16B—C16—H16C | 109.5 |
C3—C4—H4B | 108.2 | C11—C17—H17A | 109.5 |
H4A—C4—H4B | 107.3 | C11—C17—H17B | 109.5 |
O2—C5—C6 | 120.52 (19) | H17A—C17—H17B | 109.5 |
O2—C5—C4 | 120.89 (17) | C11—C17—H17C | 109.5 |
C6—C5—C4 | 118.57 (17) | H17A—C17—H17C | 109.5 |
C1—C6—C5 | 117.83 (18) | H17B—C17—H17C | 109.5 |
C1—C6—C7 | 123.52 (16) | C20—C19—C24 | 119.02 (19) |
C5—C6—C7 | 118.64 (16) | C20—C19—C7 | 120.75 (18) |
C6—C7—C8 | 109.05 (15) | C24—C19—C7 | 120.14 (16) |
C6—C7—C19 | 110.37 (15) | C21—C20—C19 | 120.34 (19) |
C8—C7—C19 | 112.14 (16) | C21—C20—H20 | 119.8 |
C6—C7—H7 | 108.4 | C19—C20—H20 | 119.8 |
C8—C7—H7 | 108.4 | O6—C21—C20 | 125.29 (19) |
C19—C7—H7 | 108.4 | O6—C21—C22 | 113.83 (19) |
C13—C8—C9 | 118.53 (17) | C20—C21—C22 | 120.88 (18) |
C13—C8—C7 | 122.46 (18) | O5—C22—C23 | 118.68 (19) |
C9—C8—C7 | 119.01 (17) | O5—C22—C21 | 122.90 (18) |
O3—C9—C8 | 120.50 (19) | C23—C22—C21 | 118.42 (19) |
O3—C9—C10 | 120.9 (2) | C24—C23—O4 | 123.88 (18) |
C8—C9—C10 | 118.48 (18) | C24—C23—C22 | 120.51 (19) |
C9—C10—C11 | 115.06 (18) | O4—C23—C22 | 115.60 (19) |
C9—C10—H10A | 108.5 | C23—C24—C19 | 120.71 (18) |
C11—C10—H10A | 108.5 | C23—C24—H24 | 119.6 |
C9—C10—H10B | 108.5 | C19—C24—H24 | 119.6 |
C11—C10—H10B | 108.5 | O6—C25—H25A | 109.5 |
H10A—C10—H10B | 107.5 | O6—C25—H25B | 109.5 |
C16—C11—C12 | 110.94 (19) | H25A—C25—H25B | 109.5 |
C16—C11—C10 | 110.21 (19) | O6—C25—H25C | 109.5 |
C12—C11—C10 | 107.87 (18) | H25A—C25—H25C | 109.5 |
C16—C11—C17 | 108.95 (19) | H25B—C25—H25C | 109.5 |
C12—C11—C17 | 108.65 (18) | O4—C26—H26A | 109.5 |
C10—C11—C17 | 110.20 (19) | O4—C26—H26B | 109.5 |
C13—C12—C11 | 112.93 (17) | H26A—C26—H26B | 109.5 |
C13—C12—H12A | 109.0 | O4—C26—H26C | 109.5 |
C11—C12—H12A | 109.0 | H26A—C26—H26C | 109.5 |
C13—C12—H12B | 109.0 | H26B—C26—H26C | 109.5 |
C11—C12—H12B | 109.0 | C13—O1—C1 | 118.10 (14) |
H12A—C12—H12B | 107.8 | C23—O4—C26 | 116.45 (17) |
C8—C13—O1 | 123.71 (16) | C22—O5—H5 | 109.5 |
C8—C13—C12 | 125.31 (18) | C21—O6—C25 | 116.86 (18) |
C6—C1—C2—C3 | −30.4 (3) | C10—C11—C12—C13 | −48.2 (2) |
O1—C1—C2—C3 | 150.19 (18) | C17—C11—C12—C13 | −167.64 (19) |
C1—C2—C3—C14 | −69.1 (2) | C9—C8—C13—O1 | −173.90 (19) |
C1—C2—C3—C15 | 170.5 (2) | C7—C8—C13—O1 | 5.3 (3) |
C1—C2—C3—C4 | 51.9 (2) | C9—C8—C13—C12 | 5.7 (3) |
C14—C3—C4—C5 | 71.9 (2) | C7—C8—C13—C12 | −175.1 (2) |
C15—C3—C4—C5 | −166.9 (2) | C11—C12—C13—C8 | 22.5 (3) |
C2—C3—C4—C5 | −48.2 (3) | C11—C12—C13—O1 | −157.83 (18) |
C3—C4—C5—O2 | −162.6 (2) | C6—C7—C19—C20 | −102.2 (2) |
C3—C4—C5—C6 | 19.2 (3) | C8—C7—C19—C20 | 136.03 (18) |
O1—C1—C6—C5 | 177.92 (18) | C6—C7—C19—C24 | 74.3 (2) |
C2—C1—C6—C5 | −1.4 (3) | C8—C7—C19—C24 | −47.5 (2) |
O1—C1—C6—C7 | −3.6 (3) | C24—C19—C20—C21 | −3.3 (3) |
C2—C1—C6—C7 | 177.01 (19) | C7—C19—C20—C21 | 173.18 (18) |
O2—C5—C6—C1 | −170.53 (19) | C19—C20—C21—O6 | −177.93 (18) |
C4—C5—C6—C1 | 7.7 (3) | C19—C20—C21—C22 | 2.2 (3) |
O2—C5—C6—C7 | 11.0 (3) | O6—C21—C22—O5 | 0.7 (3) |
C4—C5—C6—C7 | −170.83 (19) | C20—C21—C22—O5 | −179.44 (18) |
C1—C6—C7—C8 | 7.4 (3) | O6—C21—C22—C23 | −178.83 (17) |
C5—C6—C7—C8 | −174.20 (17) | C20—C21—C22—C23 | 1.1 (3) |
C1—C6—C7—C19 | −116.2 (2) | O5—C22—C23—C24 | 177.31 (19) |
C5—C6—C7—C19 | 62.2 (2) | C21—C22—C23—C24 | −3.2 (3) |
C6—C7—C8—C13 | −8.1 (3) | O5—C22—C23—O4 | −1.7 (3) |
C19—C7—C8—C13 | 114.5 (2) | C21—C22—C23—O4 | 177.83 (18) |
C6—C7—C8—C9 | 171.07 (18) | O4—C23—C24—C19 | −179.03 (18) |
C19—C7—C8—C9 | −66.4 (2) | C22—C23—C24—C19 | 2.1 (3) |
C13—C8—C9—O3 | 172.1 (2) | C20—C19—C24—C23 | 1.2 (3) |
C7—C8—C9—O3 | −7.1 (3) | C7—C19—C24—C23 | −175.31 (18) |
C13—C8—C9—C10 | −4.4 (3) | C8—C13—O1—C1 | −0.4 (3) |
C7—C8—C9—C10 | 176.45 (19) | C12—C13—O1—C1 | 179.94 (16) |
O3—C9—C10—C11 | 158.3 (2) | C6—C1—O1—C13 | −0.5 (3) |
C8—C9—C10—C11 | −25.3 (3) | C2—C1—O1—C13 | 178.95 (17) |
C9—C10—C11—C16 | −70.9 (3) | C24—C23—O4—C26 | 27.8 (3) |
C9—C10—C11—C12 | 50.4 (3) | C22—C23—O4—C26 | −153.2 (2) |
C9—C10—C11—C17 | 168.8 (2) | C20—C21—O6—C25 | 0.3 (3) |
C16—C11—C12—C13 | 72.6 (2) | C22—C21—O6—C25 | −179.86 (19) |
D—H···A | D—H | H···A | D···A | D—H···A |
O5—H5···O2i | 0.82 | 2.02 | 2.762 (2) | 151 |
Symmetry code: (i) −x+1, −y+1, −z. |
Experimental details
Crystal data | |
Chemical formula | C25H30O6 |
Mr | 426.49 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 295 |
a, b, c (Å) | 9.4268 (9), 10.2468 (10), 12.6122 (11) |
α, β, γ (°) | 84.973 (6), 70.377 (5), 75.676 (6) |
V (Å3) | 1111.83 (18) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.30 × 0.25 × 0.20 |
Data collection | |
Diffractometer | Bruker Kappa APEXII CCD |
Absorption correction | Multi-scan (SADABS; Bruker, 2004) |
Tmin, Tmax | 0.924, 0.982 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 20849, 5233, 2876 |
Rint | 0.052 |
(sin θ/λ)max (Å−1) | 0.666 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.051, 0.157, 0.98 |
No. of reflections | 5233 |
No. of parameters | 288 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.28, −0.21 |
Computer programs: APEX2 (Bruker, 2004), APEX2 and SAINT (Bruker, 2004), SAINT and XPREP (Bruker, 2004), SIR92 (Altomare et al., 1993), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997) and Mercury (Macrae et al., 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
O5—H5···O2i | 0.82 | 2.02 | 2.762 (2) | 150.6 |
Symmetry code: (i) −x+1, −y+1, −z. |
Xanthene is the parent compound of a number of naturally occurring substances and some synthetic dyes. Xanthene derivatives are used as dyes (Hilderbrand & Weissleder, 2007) and they possess biological properties like antibacterial, antiviral, anti-inflammatory (Jonathan et al., 1988) activities and are therefore used in medicine. Ehretianone, a quinonoid xanthene was reported to possess antisnake venom activity (Selvanayagam et al., 1996; Lambert et al., 1997; Poupelin et al., 1978; Hideo, 1981).
In the title compound (I), the cyclohexenone rings C1–C6 and C8–C13 both adopt an envelope conformation. In contrast, the pyran ring (O1/C1/C6/C8/C13) is almost planar with a slight deviation of C7 (0.99 Å) from the (C8/C13/O1/C1/C6) plane. The pyran ring and phenyl ring are almost perpendicular to one another making a dihedral angle of 86.32 (2)°. The bond lengths and angles are consistent with the reported structure (Odabasoglu et al., 2008; Mehdi et al., 2011). In the crystal structure, a relatively short intermolecular O5—H5···O2 hydrogen bond leads to the observation of centrosymmetrical dimers.