organic compounds\(\def\hfill{\hskip 5em}\def\hfil{\hskip 3em}\def\eqno#1{\hfil {#1}}\)

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2-Formyl-3-hydr­­oxy-9,10-anthro­quinone

aFaculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Malaysia, bDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia, and cInstitute of Biological Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia
*Correspondence e-mail: seikweng@um.edu.my

(Received 23 September 2008; accepted 6 October 2008; online 22 October 2008)

The mol­ecule of the title compound, C15H8O4, is approximately planar. An intra­molecular O—H⋯O hydrogen bond is observed between the hydr­oxy and formyl groups. The crystal used was a nonmerohedral twin, with a minor twin component of 15.9%.

Related literature

For anti­leshmanial and anti­plasmodial activities, see: Sittie et al. (1999[Sittie, A. A., Lemnmich, E., Olsen, C. E., Hviid, L., Kharazmi, A., Nkrumah, F. K. & Christensen, S. B. (1999). Planta Med. 65, 259-261.]). For the treatment of twinned diffraction data, see: Spek (2003[Spek, A. L. (2003). J. Appl. Cryst. 36, 7-13.]).

[Scheme 1]

Experimental

Crystal data
  • C15H8O4

  • Mr = 252.21

  • Triclinic, [P \overline 1]

  • a = 6.9194 (2) Å

  • b = 8.0650 (2) Å

  • c = 10.7601 (3) Å

  • α = 86.250 (2)°

  • β = 83.214 (2)°

  • γ = 64.692 (2)°

  • V = 538.96 (3) Å3

  • Z = 2

  • Mo Kα radiation

  • μ = 0.11 mm−1

  • T = 100 (2) K

  • 0.22 × 0.04 × 0.04 mm

Data collection
  • Bruker SMART APEXII area-detector diffractometer

  • Absorption correction: none

  • 4946 measured reflections

  • 2419 independent reflections

  • 1880 reflections with I > 2σ(I)

  • Rint = 0.024

Refinement
  • R[F2 > 2σ(F2)] = 0.087

  • wR(F2) = 0.343

  • S = 1.11

  • 2419 reflections

  • 173 parameters

  • H-atom parameters constrained

  • Δρmax = 0.49 e Å−3

  • Δρmin = −0.44 e Å−3

Table 1
Hydrogen-bond geometry (Å, °)

D—H⋯A D—H H⋯A DA D—H⋯A
O2—H2⋯O1 0.84 2.00 2.635 (5) 132

Data collection: APEX2 (Bruker, 2007[Bruker (2007). APEX2 and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.]); cell refinement: SAINT (Bruker, 2007[Bruker (2007). APEX2 and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.]); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); molecular graphics: X-SEED (Barbour, 2001[Barbour, L. J. (2001). J. Supramol. Chem. 1, 189-191.]); software used to prepare material for publication: publCIF (Westrip, 2008[Westrip, S. P. (2008). publCIF. In preparation.]).

Supporting information


Related literature top

For antileshmanial and antiplasmodial activities, see: Sittie et al. (1999). For the treatment of twinned diffraction data, see: Spek (2003).

Experimental top

Rennellia elliptica Korth from the Rubiaceae family was collected from Kuala Keniam, Pahang, Malaysia. The root was chopped into small pieces and dried. The dried sample (1 kg) was ground and then extracted successively with hexane, dichloromethane and methanol. The dichloromethane extract was concentrated in vacuo to give 27 g crude extract. The crude extract was fractionated by column chromatography. The column (60 cm X 5 cm) was packed with acid-washed silica gel and eluted with hexane, dichloromethane and methanol. Nine fractions were obtained, and 3-hydroxy-2-formyl-9,10-anthraquinone (41.5 mg) was isolated from the third fraction (hexane:dichloromethane, 30:70) by slow evaporation of the solvent mixture. The yellow crystals obtained were washed with acetone.

Refinement top

Carbon- and oxygen-bound H-atoms were placed in calculated positions (C—H = 0.95 Å and O—H = 0.84 Å) and were included in the refinement in the riding model approximation, with U(H) set to 1.2–1.5Ueq(C,O). The crystal studied was a non-merohedral twin. The TwinRotMat in PLATON (Spek, 2003) gave the twin law as (-1 0 0, 0 - 1 0, -0.343 - 0.049 1), whose inclusion in the refinement lowered the R index from 11.3 to 8.7%. The twin component refined to 18.9%. The refinement is deemed satisfactory although the wR2 value for all reflections is somewhat high. The structure has a long C5–C14 bond; as the anisotropic displacement parameters are normal, the likely reason is localization of the double bonds in the ring. On the other hand, the C13–C14 bond is somewhat short.

Computing details top

Data collection: APEX2 (Bruker, 2007); cell refinement: SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: X-SEED (Barbour, 2001); software used to prepare material for publication: publCIF (Westrip, 2008).

Figures top
[Figure 1] Fig. 1. The molecular structure of the title compound, showing 70% probability displacement ellipsoids. H atoms are drawn as spheres of arbitrary radii.
2-Formyl-3-hydroxy-9,10-anthroquinone top
Crystal data top
C15H8O4Z = 2
Mr = 252.21F(000) = 260
Triclinic, P1Dx = 1.554 Mg m3
Hall symbol: -P 1Mo Kα radiation, λ = 0.71073 Å
a = 6.9194 (2) ÅCell parameters from 1888 reflections
b = 8.0650 (2) Åθ = 3.3–28.3°
c = 10.7601 (3) ŵ = 0.11 mm1
α = 86.250 (2)°T = 100 K
β = 83.214 (2)°Block, yellow
γ = 64.692 (2)°0.22 × 0.04 × 0.04 mm
V = 538.96 (3) Å3
Data collection top
Bruker SMART APEXII area-detector
diffractometer
1880 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tubeRint = 0.024
Graphite monochromatorθmax = 27.5°, θmin = 2.8°
ω scansh = 88
4946 measured reflectionsk = 1010
2419 independent reflectionsl = 1313
Refinement top
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.087Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.343H-atom parameters constrained
S = 1.11 w = 1/[σ2(Fo2) + (0.1778P)2 + 2.2381P]
where P = (Fo2 + 2Fc2)/3
2419 reflections(Δ/σ)max = 0.001
173 parametersΔρmax = 0.49 e Å3
0 restraintsΔρmin = 0.44 e Å3
Crystal data top
C15H8O4γ = 64.692 (2)°
Mr = 252.21V = 538.96 (3) Å3
Triclinic, P1Z = 2
a = 6.9194 (2) ÅMo Kα radiation
b = 8.0650 (2) ŵ = 0.11 mm1
c = 10.7601 (3) ÅT = 100 K
α = 86.250 (2)°0.22 × 0.04 × 0.04 mm
β = 83.214 (2)°
Data collection top
Bruker SMART APEXII area-detector
diffractometer
1880 reflections with I > 2σ(I)
4946 measured reflectionsRint = 0.024
2419 independent reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0870 restraints
wR(F2) = 0.343H-atom parameters constrained
S = 1.11Δρmax = 0.49 e Å3
2419 reflectionsΔρmin = 0.44 e Å3
173 parameters
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
O10.3155 (6)0.6486 (5)0.0888 (3)0.0251 (8)
O20.2501 (6)0.3493 (5)0.0941 (3)0.0242 (8)
H20.26110.43450.04900.029*
O30.2366 (5)0.0898 (4)0.4383 (3)0.0153 (7)
O40.2779 (5)0.4648 (4)0.6688 (3)0.0172 (7)
C10.3060 (7)0.6395 (6)0.2041 (4)0.0178 (9)
H10.31710.73360.24740.021*
C20.2786 (7)0.4901 (6)0.2772 (4)0.0143 (9)
C30.2544 (7)0.3500 (6)0.2187 (4)0.0161 (9)
C40.2356 (7)0.2059 (6)0.2894 (4)0.0152 (9)
H40.21870.11160.25000.018*
C50.2419 (6)0.2016 (5)0.4183 (4)0.0123 (8)
C60.2335 (6)0.0406 (5)0.4916 (4)0.0112 (8)
C70.2285 (6)0.0417 (5)0.6299 (4)0.0112 (8)
C80.2117 (7)0.1043 (6)0.7003 (4)0.0139 (8)
H80.19860.19990.66010.017*
C90.2144 (7)0.1091 (6)0.8286 (4)0.0179 (9)
H90.20310.20830.87660.021*
C100.2336 (7)0.0310 (6)0.8883 (4)0.0188 (9)
H100.23530.02690.97670.023*
C110.2503 (7)0.1762 (6)0.8187 (4)0.0173 (9)
H110.26450.27090.85940.021*
C120.2462 (6)0.1835 (5)0.6895 (4)0.0113 (8)
C130.2641 (6)0.3403 (6)0.6165 (4)0.0126 (8)
C140.2621 (6)0.3426 (5)0.4787 (4)0.0120 (8)
C150.2815 (7)0.4851 (6)0.4072 (4)0.0133 (8)
H150.29680.58010.44680.016*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
O10.038 (2)0.0258 (18)0.0125 (16)0.0155 (16)0.0033 (13)0.0054 (13)
O20.046 (2)0.0283 (18)0.0063 (15)0.0226 (17)0.0062 (13)0.0020 (12)
O30.0194 (15)0.0131 (14)0.0147 (15)0.0079 (12)0.0028 (11)0.0009 (11)
O40.0228 (16)0.0148 (15)0.0165 (15)0.0103 (13)0.0003 (12)0.0039 (11)
C10.021 (2)0.017 (2)0.016 (2)0.0078 (17)0.0040 (16)0.0035 (16)
C20.0146 (19)0.0149 (19)0.0119 (19)0.0053 (16)0.0011 (14)0.0030 (15)
C30.017 (2)0.021 (2)0.0103 (19)0.0080 (17)0.0030 (15)0.0010 (15)
C40.016 (2)0.016 (2)0.014 (2)0.0074 (16)0.0007 (15)0.0025 (15)
C50.0106 (18)0.0107 (18)0.0135 (19)0.0032 (14)0.0010 (14)0.0003 (14)
C60.0099 (17)0.0105 (18)0.0121 (19)0.0036 (14)0.0001 (14)0.0004 (14)
C70.0109 (18)0.0114 (18)0.0103 (18)0.0038 (14)0.0025 (13)0.0011 (14)
C80.0145 (19)0.0118 (18)0.015 (2)0.0053 (15)0.0023 (15)0.0013 (14)
C90.019 (2)0.017 (2)0.017 (2)0.0081 (17)0.0012 (16)0.0055 (16)
C100.024 (2)0.022 (2)0.0110 (19)0.0100 (18)0.0009 (16)0.0026 (16)
C110.021 (2)0.018 (2)0.013 (2)0.0084 (17)0.0008 (16)0.0009 (15)
C120.0108 (18)0.0112 (18)0.0109 (18)0.0039 (14)0.0002 (14)0.0005 (14)
C130.0112 (18)0.0125 (19)0.0139 (19)0.0046 (15)0.0015 (14)0.0010 (14)
C140.0116 (18)0.0112 (18)0.0127 (19)0.0044 (14)0.0001 (14)0.0002 (14)
C150.0138 (19)0.0112 (18)0.014 (2)0.0049 (15)0.0006 (14)0.0017 (14)
Geometric parameters (Å, º) top
O1—C11.234 (5)C7—C81.398 (5)
O2—C31.345 (5)C7—C121.403 (5)
O2—H20.84C8—C91.380 (6)
O3—C61.222 (5)C8—H80.95
O4—C131.226 (5)C9—C101.397 (6)
C1—C21.464 (6)C9—H90.95
C1—H10.95C10—C111.388 (6)
C2—C151.400 (6)C10—H100.95
C2—C31.407 (6)C11—C121.391 (6)
C3—C41.391 (6)C11—H110.95
C4—C51.390 (6)C12—C131.487 (5)
C4—H40.95C13—C141.483 (6)
C5—C141.410 (6)C14—C151.387 (6)
C5—C61.494 (5)C15—H150.95
C6—C71.485 (5)
C3—O2—H2120.0C9—C8—H8120.1
O1—C1—C2122.8 (4)C7—C8—H8120.1
O1—C1—H1118.6C8—C9—C10120.4 (4)
C2—C1—H1118.6C8—C9—H9119.8
C15—C2—C3119.7 (4)C10—C9—H9119.8
C15—C2—C1119.1 (4)C11—C10—C9120.0 (4)
C3—C2—C1121.2 (4)C11—C10—H10120.0
O2—C3—C4117.9 (4)C9—C10—H10120.0
O2—C3—C2121.8 (4)C10—C11—C12120.2 (4)
C4—C3—C2120.3 (4)C10—C11—H11119.9
C5—C4—C3119.2 (4)C12—C11—H11119.9
C5—C4—H4120.4C11—C12—C7119.6 (4)
C3—C4—H4120.4C11—C12—C13119.4 (4)
C4—C5—C14121.2 (4)C7—C12—C13121.1 (3)
C4—C5—C6118.4 (4)O4—C13—C14121.0 (4)
C14—C5—C6120.3 (4)O4—C13—C12121.0 (4)
O3—C6—C7121.3 (4)C14—C13—C12118.0 (3)
O3—C6—C5120.5 (4)C15—C14—C5119.0 (4)
C7—C6—C5118.1 (3)C15—C14—C13119.7 (4)
C8—C7—C12120.1 (4)C5—C14—C13121.3 (4)
C8—C7—C6118.9 (4)C14—C15—C2120.5 (4)
C12—C7—C6121.0 (3)C14—C15—H15119.8
C9—C8—C7119.7 (4)C2—C15—H15119.8
O1—C1—C2—C15176.5 (4)C10—C11—C12—C71.0 (6)
O1—C1—C2—C32.1 (7)C10—C11—C12—C13180.0 (4)
C15—C2—C3—O2179.8 (4)C8—C7—C12—C111.0 (6)
C1—C2—C3—O21.7 (7)C6—C7—C12—C11177.2 (4)
C15—C2—C3—C40.7 (7)C8—C7—C12—C13180.0 (3)
C1—C2—C3—C4177.9 (4)C6—C7—C12—C131.8 (6)
O2—C3—C4—C5179.3 (4)C11—C12—C13—O41.5 (6)
C2—C3—C4—C50.3 (7)C7—C12—C13—O4179.4 (4)
C3—C4—C5—C141.4 (6)C11—C12—C13—C14179.2 (4)
C3—C4—C5—C6176.7 (4)C7—C12—C13—C140.2 (6)
C4—C5—C6—O35.1 (6)C4—C5—C14—C151.6 (6)
C14—C5—C6—O3173.0 (4)C6—C5—C14—C15176.4 (3)
C4—C5—C6—C7176.8 (4)C4—C5—C14—C13178.7 (4)
C14—C5—C6—C75.1 (6)C6—C5—C14—C133.2 (6)
O3—C6—C7—C84.6 (6)O4—C13—C14—C151.6 (6)
C5—C6—C7—C8177.4 (4)C12—C13—C14—C15179.1 (4)
O3—C6—C7—C12173.7 (4)O4—C13—C14—C5178.7 (4)
C5—C6—C7—C124.4 (6)C12—C13—C14—C50.6 (6)
C12—C7—C8—C90.5 (6)C5—C14—C15—C20.7 (6)
C6—C7—C8—C9177.7 (4)C13—C14—C15—C2179.6 (4)
C7—C8—C9—C100.0 (7)C3—C2—C15—C140.4 (6)
C8—C9—C10—C110.0 (7)C1—C2—C15—C14178.1 (4)
C9—C10—C11—C120.5 (7)
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
O2—H2···O10.842.002.635 (5)132

Experimental details

Crystal data
Chemical formulaC15H8O4
Mr252.21
Crystal system, space groupTriclinic, P1
Temperature (K)100
a, b, c (Å)6.9194 (2), 8.0650 (2), 10.7601 (3)
α, β, γ (°)86.250 (2), 83.214 (2), 64.692 (2)
V3)538.96 (3)
Z2
Radiation typeMo Kα
µ (mm1)0.11
Crystal size (mm)0.22 × 0.04 × 0.04
Data collection
DiffractometerBruker SMART APEXII area-detector
diffractometer
Absorption correction
No. of measured, independent and
observed [I > 2σ(I)] reflections
4946, 2419, 1880
Rint0.024
(sin θ/λ)max1)0.649
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.087, 0.343, 1.11
No. of reflections2419
No. of parameters173
H-atom treatmentH-atom parameters constrained
Δρmax, Δρmin (e Å3)0.49, 0.44

Computer programs: APEX2 (Bruker, 2007), SAINT (Bruker, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), X-SEED (Barbour, 2001), publCIF (Westrip, 2008).

Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
O2—H2···O10.842.002.635 (5)132
 

Acknowledgements

The authors thank the University of Malaya for supporting this study.

References

First citationBarbour, L. J. (2001). J. Supramol. Chem. 1, 189–191.  CrossRef CAS Google Scholar
First citationBruker (2007). APEX2 and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.  Google Scholar
First citationSheldrick, G. M. (2008). Acta Cryst. A64, 112–122.  Web of Science CrossRef CAS IUCr Journals Google Scholar
First citationSittie, A. A., Lemnmich, E., Olsen, C. E., Hviid, L., Kharazmi, A., Nkrumah, F. K. & Christensen, S. B. (1999). Planta Med. 65, 259–261.  Web of Science CrossRef PubMed CAS Google Scholar
First citationSpek, A. L. (2003). J. Appl. Cryst. 36, 7–13.  Web of Science CrossRef CAS IUCr Journals Google Scholar
First citationWestrip, S. P. (2008). publCIF. In preparation.  Google Scholar

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