organic compounds
Resorcinol ninhydrin complex: 1,5,9-trihydroxy-8-oxatetracyclo[7.7.0.02,7.010,15]hexadeca-2,4,6,10(15),11,13-hexaen-16-one
aDepartment of Physics, Government Arts College for Women, Pudukkottaii 622 001, India, bDepartment of Physics, Cauvery College for Women, Tiruchirappalli 620 018, India, cDepartment of Physics, Shivani Institute of Technology, Tiruchirappalli 620 009, India, dDepartment of Physics, Kalasalingam University, Krishnankoil 626 126, India, and eLaboratory of X-ray Crystallography, Indian Institute of Chemical Technology, Hyderabad 500 007, India
*Correspondence e-mail: s_selvanayagam@rediffmail.com
In the title compound, C15H10O5, the cyclopentanone (r.m.s. deviation = 0.049 Å) and oxolane (r.m.s. deviation = 0.048 Å) rings make a dihedral angle of 67.91 (4)°. An intramolecular O—H⋯O hydrogen bond is observed. In the crystal, molecules associate via O—H⋯O hydrogen bonds, forming a three-dimensional network.
Related literature
For general background to ninhydrin derivatives, see: Hansen & Joullie (2005); Leane et al. (2004). For general background to resorcinol derivatives, see: Chen et al. (2011); Bao et al. (2010); Zheng & Wu (2007).
Experimental
Crystal data
|
Data collection
|
Refinement
|
Data collection: SMART (Bruker, 2001); cell SAINT (Bruker, 2001); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008) and PLATON.
Supporting information
10.1107/S1600536812014249/bt5867sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536812014249/bt5867Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536812014249/bt5867Isup3.cml
A mixture of ninhydrin and resorcinol in molar ratio 1:1 were dissolved in dilute acetic medium and stirred well using a temperature controlled magnetic stirrer to yield a homogeneous mixture of solution. Then the solution was allowed to evaporate at room temperature, which yielded a crystalline adduct. Single crystals were grown by slow evaporation from ethanol.
Data collection: SMART (Bruker, 2001); cell
SAINT (Bruker, 2001); data reduction: SAINT (Bruker, 2001); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009).C15H10O5 | F(000) = 560 |
Mr = 270.23 | Dx = 1.584 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 8468 reflections |
a = 9.1117 (5) Å | θ = 2.2–27.1° |
b = 12.2995 (7) Å | µ = 0.12 mm−1 |
c = 10.1177 (5) Å | T = 292 K |
β = 91.837 (1)° | Block, colourless |
V = 1133.30 (11) Å3 | 0.22 × 0.20 × 0.19 mm |
Z = 4 |
Bruker SMART APEX CCD area-detector diffractometer | 2468 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.020 |
Graphite monochromator | θmax = 28.0°, θmin = 2.2° |
ω scans | h = −12→11 |
12939 measured reflections | k = −16→16 |
2699 independent reflections | l = −13→13 |
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)] = 0.039 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.106 | All H-atom parameters refined |
S = 1.05 | w = 1/[σ2(Fo2) + (0.0594P)2 + 0.3056P] where P = (Fo2 + 2Fc2)/3 |
2699 reflections | (Δ/σ)max < 0.001 |
221 parameters | Δρmax = 0.31 e Å−3 |
0 restraints | Δρmin = −0.28 e Å−3 |
C15H10O5 | V = 1133.30 (11) Å3 |
Mr = 270.23 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 9.1117 (5) Å | µ = 0.12 mm−1 |
b = 12.2995 (7) Å | T = 292 K |
c = 10.1177 (5) Å | 0.22 × 0.20 × 0.19 mm |
β = 91.837 (1)° |
Bruker SMART APEX CCD area-detector diffractometer | 2468 reflections with I > 2σ(I) |
12939 measured reflections | Rint = 0.020 |
2699 independent reflections |
R[F2 > 2σ(F2)] = 0.039 | 0 restraints |
wR(F2) = 0.106 | All H-atom parameters refined |
S = 1.05 | Δρmax = 0.31 e Å−3 |
2699 reflections | Δρmin = −0.28 e Å−3 |
221 parameters |
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds 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 > 2sigma(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 | 0.55633 (10) | 0.40497 (9) | 0.32526 (9) | 0.0416 (2) | |
O2 | 0.38544 (11) | 0.59167 (7) | 0.40684 (9) | 0.0382 (2) | |
H2A | 0.394 (2) | 0.5760 (16) | 0.490 (2) | 0.058 (5)* | |
O3 | 0.22262 (11) | 0.65338 (7) | 0.19634 (9) | 0.0369 (2) | |
H3A | 0.219 (2) | 0.689 (2) | 0.272 (2) | 0.080 (7)* | |
O4 | −0.12067 (11) | 0.24783 (9) | 0.55006 (10) | 0.0444 (3) | |
H4A | −0.175 (2) | 0.2263 (19) | 0.479 (2) | 0.076 (6)* | |
O5 | 0.07320 (9) | 0.50826 (7) | 0.24520 (8) | 0.0336 (2) | |
C1 | 0.21080 (14) | 0.48007 (11) | −0.02647 (12) | 0.0345 (3) | |
H1 | 0.1252 (19) | 0.5225 (14) | −0.0506 (16) | 0.042 (4)* | |
C2 | 0.27738 (16) | 0.41740 (12) | −0.12105 (13) | 0.0409 (3) | |
H2 | 0.2341 (19) | 0.4179 (14) | −0.2090 (18) | 0.049 (4)* | |
C3 | 0.40256 (16) | 0.35623 (11) | −0.09057 (14) | 0.0418 (3) | |
H3 | 0.4472 (19) | 0.3140 (14) | −0.1582 (17) | 0.048 (4)* | |
C4 | 0.46396 (14) | 0.35571 (10) | 0.03612 (13) | 0.0366 (3) | |
H4 | 0.5509 (18) | 0.3132 (14) | 0.0606 (15) | 0.041 (4)* | |
C5 | 0.39742 (12) | 0.41873 (10) | 0.13132 (11) | 0.0301 (2) | |
C6 | 0.27356 (12) | 0.48078 (9) | 0.10008 (11) | 0.0285 (2) | |
C7 | 0.44307 (12) | 0.43593 (10) | 0.27024 (11) | 0.0302 (2) | |
C8 | 0.32381 (12) | 0.50301 (9) | 0.33703 (11) | 0.0283 (2) | |
C9 | 0.22170 (12) | 0.54241 (9) | 0.21795 (11) | 0.0289 (2) | |
C10 | 0.22056 (12) | 0.43138 (9) | 0.41014 (11) | 0.0278 (2) | |
C11 | 0.24218 (13) | 0.36685 (10) | 0.52153 (11) | 0.0310 (2) | |
H11 | 0.3393 (17) | 0.3619 (12) | 0.5676 (15) | 0.036 (4)* | |
C12 | 0.12568 (14) | 0.30692 (10) | 0.56731 (12) | 0.0336 (3) | |
H12 | 0.1362 (17) | 0.2601 (13) | 0.6454 (16) | 0.043 (4)* | |
C13 | −0.01040 (13) | 0.31088 (10) | 0.50070 (12) | 0.0328 (3) | |
C14 | −0.03552 (13) | 0.37657 (10) | 0.39052 (12) | 0.0331 (3) | |
H14 | −0.1314 (18) | 0.3805 (13) | 0.3462 (15) | 0.041 (4)* | |
C15 | 0.08212 (12) | 0.43688 (10) | 0.34892 (11) | 0.0290 (2) |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0309 (4) | 0.0562 (6) | 0.0373 (5) | 0.0065 (4) | −0.0056 (4) | 0.0060 (4) |
O2 | 0.0455 (5) | 0.0369 (5) | 0.0315 (5) | −0.0098 (4) | −0.0097 (4) | −0.0017 (4) |
O3 | 0.0480 (5) | 0.0302 (4) | 0.0321 (5) | 0.0039 (4) | −0.0046 (4) | 0.0019 (3) |
O4 | 0.0441 (5) | 0.0478 (6) | 0.0416 (5) | −0.0145 (4) | 0.0066 (4) | −0.0008 (4) |
O5 | 0.0264 (4) | 0.0455 (5) | 0.0288 (4) | 0.0020 (3) | −0.0033 (3) | 0.0050 (3) |
C1 | 0.0349 (6) | 0.0402 (6) | 0.0281 (6) | −0.0044 (5) | −0.0046 (4) | 0.0013 (5) |
C2 | 0.0495 (7) | 0.0471 (7) | 0.0261 (6) | −0.0107 (6) | −0.0005 (5) | −0.0029 (5) |
C3 | 0.0504 (8) | 0.0396 (7) | 0.0360 (7) | −0.0074 (6) | 0.0106 (6) | −0.0079 (5) |
C4 | 0.0357 (6) | 0.0338 (6) | 0.0408 (7) | −0.0013 (5) | 0.0063 (5) | −0.0008 (5) |
C5 | 0.0292 (5) | 0.0319 (6) | 0.0293 (6) | −0.0039 (4) | −0.0003 (4) | 0.0019 (4) |
C6 | 0.0293 (5) | 0.0311 (5) | 0.0250 (5) | −0.0044 (4) | −0.0006 (4) | 0.0009 (4) |
C7 | 0.0269 (5) | 0.0333 (5) | 0.0304 (6) | −0.0031 (4) | −0.0015 (4) | 0.0047 (4) |
C8 | 0.0288 (5) | 0.0309 (5) | 0.0249 (5) | −0.0016 (4) | −0.0051 (4) | 0.0006 (4) |
C9 | 0.0292 (5) | 0.0316 (5) | 0.0258 (5) | 0.0004 (4) | −0.0031 (4) | 0.0009 (4) |
C10 | 0.0277 (5) | 0.0310 (5) | 0.0247 (5) | 0.0002 (4) | −0.0006 (4) | −0.0026 (4) |
C11 | 0.0322 (6) | 0.0333 (6) | 0.0272 (5) | 0.0015 (4) | −0.0031 (4) | −0.0013 (4) |
C12 | 0.0404 (6) | 0.0321 (6) | 0.0282 (6) | 0.0005 (5) | 0.0011 (5) | −0.0002 (4) |
C13 | 0.0354 (6) | 0.0323 (6) | 0.0310 (6) | −0.0049 (5) | 0.0061 (4) | −0.0067 (4) |
C14 | 0.0284 (5) | 0.0397 (6) | 0.0310 (6) | −0.0016 (5) | −0.0011 (4) | −0.0055 (5) |
C15 | 0.0297 (5) | 0.0334 (6) | 0.0239 (5) | 0.0022 (4) | −0.0013 (4) | −0.0032 (4) |
O1—C7 | 1.2178 (14) | C4—H4 | 0.975 (17) |
O2—C8 | 1.4063 (14) | C5—C6 | 1.3904 (16) |
O2—H2A | 0.87 (2) | C5—C7 | 1.4683 (16) |
O3—C9 | 1.3823 (14) | C6—C9 | 1.5021 (16) |
O3—H3A | 0.89 (2) | C7—C8 | 1.5379 (16) |
O4—C13 | 1.3756 (15) | C8—C10 | 1.5011 (16) |
O4—H4A | 0.90 (2) | C8—C9 | 1.5749 (15) |
O5—C15 | 1.3686 (14) | C10—C11 | 1.3873 (16) |
O5—C9 | 1.4516 (14) | C10—C15 | 1.3890 (15) |
C1—C2 | 1.3839 (19) | C11—C12 | 1.3843 (17) |
C1—C6 | 1.3855 (16) | C11—H11 | 0.989 (16) |
C1—H1 | 0.964 (17) | C12—C13 | 1.3930 (18) |
C2—C3 | 1.393 (2) | C12—H12 | 0.979 (17) |
C2—H2 | 0.962 (18) | C13—C14 | 1.3899 (18) |
C3—C4 | 1.382 (2) | C14—C15 | 1.3803 (17) |
C3—H3 | 0.960 (17) | C14—H14 | 0.970 (16) |
C4—C5 | 1.3907 (17) | ||
C8—O2—H2A | 109.8 (13) | O2—C8—C9 | 111.24 (9) |
C9—O3—H3A | 110.3 (15) | C10—C8—C9 | 101.15 (9) |
C13—O4—H4A | 105.4 (14) | C7—C8—C9 | 103.73 (9) |
C15—O5—C9 | 107.37 (8) | O3—C9—O5 | 109.04 (9) |
C2—C1—C6 | 117.74 (12) | O3—C9—C6 | 111.66 (9) |
C2—C1—H1 | 119.7 (10) | O5—C9—C6 | 108.88 (9) |
C6—C1—H1 | 122.5 (10) | O3—C9—C8 | 114.73 (9) |
C1—C2—C3 | 121.46 (12) | O5—C9—C8 | 107.28 (9) |
C1—C2—H2 | 117.4 (10) | C6—C9—C8 | 105.01 (9) |
C3—C2—H2 | 121.1 (10) | C11—C10—C15 | 119.57 (11) |
C4—C3—C2 | 120.81 (12) | C11—C10—C8 | 131.39 (10) |
C4—C3—H3 | 119.4 (10) | C15—C10—C8 | 109.04 (10) |
C2—C3—H3 | 119.8 (10) | C12—C11—C10 | 119.08 (11) |
C3—C4—C5 | 117.86 (12) | C12—C11—H11 | 119.6 (9) |
C3—C4—H4 | 122.6 (9) | C10—C11—H11 | 121.3 (9) |
C5—C4—H4 | 119.5 (9) | C11—C12—C13 | 119.98 (11) |
C6—C5—C4 | 121.15 (11) | C11—C12—H12 | 121.8 (9) |
C6—C5—C7 | 109.97 (10) | C13—C12—H12 | 118.2 (9) |
C4—C5—C7 | 128.83 (11) | O4—C13—C14 | 121.03 (11) |
C1—C6—C5 | 120.97 (11) | O4—C13—C12 | 116.99 (11) |
C1—C6—C9 | 127.29 (11) | C14—C13—C12 | 121.97 (11) |
C5—C6—C9 | 111.73 (10) | C15—C14—C13 | 116.58 (11) |
O1—C7—C5 | 127.04 (11) | C15—C14—H14 | 121.9 (9) |
O1—C7—C8 | 124.56 (11) | C13—C14—H14 | 121.5 (9) |
C5—C7—C8 | 108.39 (9) | O5—C15—C14 | 123.43 (10) |
O2—C8—C10 | 117.01 (9) | O5—C15—C10 | 113.82 (10) |
O2—C8—C7 | 111.12 (9) | C14—C15—C10 | 122.74 (11) |
C10—C8—C7 | 111.37 (9) | ||
C6—C1—C2—C3 | 0.49 (19) | O2—C8—C9—O3 | 5.95 (14) |
C1—C2—C3—C4 | 0.4 (2) | C10—C8—C9—O3 | 130.92 (10) |
C2—C3—C4—C5 | −0.50 (19) | C7—C8—C9—O3 | −113.58 (10) |
C3—C4—C5—C6 | −0.34 (18) | O2—C8—C9—O5 | −115.34 (10) |
C3—C4—C5—C7 | −177.34 (12) | C10—C8—C9—O5 | 9.63 (11) |
C2—C1—C6—C5 | −1.33 (18) | C7—C8—C9—O5 | 125.13 (9) |
C2—C1—C6—C9 | 179.74 (11) | O2—C8—C9—C6 | 128.92 (10) |
C4—C5—C6—C1 | 1.28 (18) | C10—C8—C9—C6 | −106.11 (10) |
C7—C5—C6—C1 | 178.80 (10) | C7—C8—C9—C6 | 9.39 (11) |
C4—C5—C6—C9 | −179.63 (10) | O2—C8—C10—C11 | −62.49 (17) |
C7—C5—C6—C9 | −2.12 (13) | C7—C8—C10—C11 | 66.83 (15) |
C6—C5—C7—O1 | −170.36 (12) | C9—C8—C10—C11 | 176.52 (12) |
C4—C5—C7—O1 | 6.9 (2) | O2—C8—C10—C15 | 116.84 (11) |
C6—C5—C7—C8 | 8.49 (13) | C7—C8—C10—C15 | −113.83 (10) |
C4—C5—C7—C8 | −174.24 (11) | C9—C8—C10—C15 | −4.14 (12) |
O1—C7—C8—O2 | 48.37 (15) | C15—C10—C11—C12 | 1.69 (17) |
C5—C7—C8—O2 | −130.52 (10) | C8—C10—C11—C12 | −179.04 (11) |
O1—C7—C8—C10 | −84.00 (14) | C10—C11—C12—C13 | 0.81 (18) |
C5—C7—C8—C10 | 97.11 (10) | C11—C12—C13—O4 | 178.84 (11) |
O1—C7—C8—C9 | 167.98 (11) | C11—C12—C13—C14 | −2.16 (18) |
C5—C7—C8—C9 | −10.91 (11) | O4—C13—C14—C15 | 179.85 (11) |
C15—O5—C9—O3 | −136.72 (9) | C12—C13—C14—C15 | 0.90 (18) |
C15—O5—C9—C6 | 101.24 (10) | C9—O5—C15—C14 | −170.98 (11) |
C15—O5—C9—C8 | −11.91 (12) | C9—O5—C15—C10 | 9.76 (13) |
C1—C6—C9—O3 | −60.94 (15) | C13—C14—C15—O5 | −177.48 (10) |
C5—C6—C9—O3 | 120.05 (11) | C13—C14—C15—C10 | 1.71 (17) |
C1—C6—C9—O5 | 59.51 (15) | C11—C10—C15—O5 | 176.22 (10) |
C5—C6—C9—O5 | −119.51 (10) | C8—C10—C15—O5 | −3.20 (13) |
C1—C6—C9—C8 | 174.14 (11) | C11—C10—C15—C14 | −3.04 (18) |
C5—C6—C9—C8 | −4.88 (12) | C8—C10—C15—C14 | 177.54 (10) |
D—H···A | D—H | H···A | D···A | D—H···A |
O4—H4A···O3i | 0.90 (2) | 2.02 (2) | 2.877 (1) | 158 (2) |
O3—H3A···O4ii | 0.89 (2) | 2.18 (2) | 3.013 (1) | 157 (2) |
O2—H2A···O1iii | 0.87 (2) | 1.92 (2) | 2.746 (1) | 159 (2) |
O3—H3A···O2 | 0.89 (2) | 2.33 (2) | 2.667 (1) | 102 (1) |
Symmetry codes: (i) −x, y−1/2, −z+1/2; (ii) −x, −y+1, −z+1; (iii) −x+1, −y+1, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C15H10O5 |
Mr | 270.23 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 292 |
a, b, c (Å) | 9.1117 (5), 12.2995 (7), 10.1177 (5) |
β (°) | 91.837 (1) |
V (Å3) | 1133.30 (11) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.12 |
Crystal size (mm) | 0.22 × 0.20 × 0.19 |
Data collection | |
Diffractometer | Bruker SMART APEX CCD area-detector diffractometer |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 12939, 2699, 2468 |
Rint | 0.020 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.039, 0.106, 1.05 |
No. of reflections | 2699 |
No. of parameters | 221 |
H-atom treatment | All H-atom parameters refined |
Δρmax, Δρmin (e Å−3) | 0.31, −0.28 |
Computer programs: SMART (Bruker, 2001), SAINT (Bruker, 2001), SHELXS97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997) and PLATON (Spek, 2009), SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
O4—H4A···O3i | 0.90 (2) | 2.02 (2) | 2.877 (1) | 158 (2) |
O3—H3A···O4ii | 0.89 (2) | 2.18 (2) | 3.013 (1) | 157 (2) |
O2—H2A···O1iii | 0.87 (2) | 1.92 (2) | 2.746 (1) | 159 (2) |
O3—H3A···O2 | 0.89 (2) | 2.33 (2) | 2.667 (1) | 102 (1) |
Symmetry codes: (i) −x, y−1/2, −z+1/2; (ii) −x, −y+1, −z+1; (iii) −x+1, −y+1, −z+1. |
Acknowledgements
SS acknowledges the Department of Science and Technology (DST), India, for providing computing facilities under the DST-Fast Track Scheme.
References
Bao, L., Wang, M., Zhao, F., Zhao, Y. & Liu, H. (2010). Chem. Biodivers. 7, 2901–2907. Web of Science CrossRef CAS PubMed Google Scholar
Bruker (2001). SMART and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Chen, L. P., Zhao, F., Wang, Y., Zhao, L. L., Li, Q. P. & Liu, H. W. (2011). J. Asian. Nat. Prod. Res. 13, 734–743. Web of Science CrossRef CAS PubMed Google Scholar
Farrugia, L. J. (1997). J. Appl. Cryst. 30, 565. CrossRef IUCr Journals Google Scholar
Hansen, D. B. & Joullie, M. M. (2005). Chem. Soc. Rev. 34, 408–417. Web of Science CrossRef PubMed CAS Google Scholar
Leane, M. M., Nankervis, R., Smith, A. & Illum, L. (2004). Int. J. Pharm. 271, 241–249. Web of Science CrossRef PubMed CAS Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Spek, A. L. (2009). Acta Cryst. D65, 148–155. Web of Science CrossRef CAS IUCr Journals Google Scholar
Zheng, Y. & Wu, F. E. (2007). J. Asian. Nat. Prod. Res. 9, 545–549. Web of Science CrossRef PubMed CAS Google Scholar
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Resorcinol derivatives posses cytotoxity (Zheng & Wu, 2007; Bao et al., 2010) and antitumor activities (Chen et al., 2011). Ninhydrin analogue was found to be an important reagent to develop finger prints on porous surface (Hansen & Joullie, 2005). Ninhydrin assay is an essential aid in the design and testing of solid dosage forms with different chitosan-drug release profiles (Leane et al., 2004).In view of these importance on ninhydrin and resorcinol derivatives, we have undertaken the crystal structure determination of the present complex, and the results are presented here.
The X-ray study confirmed the molecular structure and atomic connectivity for (I), as illustrated in Fig. 1.
The plane calculation revealed that the benzene, cyclopentanone, oxolane and phenyl rings are in planar. Atoms O1, O2 and O3 deviate by 0.235 (1), 0.916 (1) and 1.166 (1) Å, respectively with respect to the fused rings of benzene and cyclopentanone. Atoms O2, O3 and O4 deviate by -1.127 (1), -0.801 (1) and 0.091 (1) Å, respectively with respect to the fused rings of oxolane and phenyl rings. The dihedral angle between the two half of the molecule with respect to C8-C9 bond is 1.5 (1)°.
The molecular structure is influenced by an intramolecular O—H···O hydrogen bonds. In the molecular packing, O—H···O hydrogen bonds involving atoms O3 and O4 link inversion-related molecules to form R22 (16) graph-set dimer. (Fig. 2 and Table 1). In addition to this atoms, O2 and C11 form a R22(10) graph-set motif in the unit cell with the help of intermolecular hydrogen bonds (Fig.3). A C(8) chain motif is formed in the unit cell with the help of O—H···O hydrogen bonds involving atoms O4 and O3 which results the helical shape arrangement along bc plane of the unit cell (Fig. 4).