organic compounds
2,4,8,10-Tetraoxa-3,9-dithiaspiro[5.5]undecane 3,9-dioxide
aKey Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang 550025, People's Republic of China, and bInstitute of Applied Chemistry, Guizhou University, Guiyang 550025, People's Republic of China
*Correspondence e-mail: gyhxxiaoxin@163.com
The 5H8O6S2, consists of two spiro[5.5]undecane molecules. The nonplanar six-membered rings adopt chair conformations. In the weak intermolecular C—H⋯O interactions, together with close O⋯S contacts in the range 3.308 (3)–3.315 (3) Å, stabilize the packing.
of the title compound, CRelated literature
For background to the use of the title compound in the synthesis of pesticides, see: Jermy & Pandurangan (2005). For ring conformation puckering parameters, see: Cremer & Pople (1975). For bond-length data, see: Allen et al. (1987).
Experimental
Crystal data
|
Data collection: SMART (Bruker, 2002); cell SAINT (Bruker, 2002); 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 for Windows (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999).
Supporting information
10.1107/S1600536808036891/at2669sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536808036891/at2669Isup2.hkl
A solution of thionyl chloride 30 ml (13.6 g 0.1 mol) in CH2Cl2 (30 ml) was added to a stirred solution of pentaerythritol (13.6 g 0.1 mol) in CH2Cl2 (50 ml) at room temperature for 24 h, and was then heated to reflux for 5 h. The resulting solution was evaporated to dryness under reduced pressure and the white product washed with warm water, the mixture filtered and the residue dissolved in 80 ml boiling distilled water then cooled. Single crystals of (I) were obtained after several days.
Water H atoms were located in a difference Fourier map and refined as riding in their as-found positions relative to O atoms with Uiso(H) = 1.2Ueq(O). All other H atoms were placed in calculated positions and refined as riding, with C—H = 0.93–0.97 Å, N—H = 0.86 Å, and Uiso(H) = 1.2–1.5Ueq(C,N).
Data collection: SMART (Bruker, 2002); cell
SAINT (Bruker, 2002); data reduction: SAINT (Bruker, 2002; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999).Fig. 1. The molecular structure of (I) showing the atom-labelling scheme. Displacement ellipsoids are drawn at the 50% probability level. |
C5H8O6S2 | F(000) = 944 |
Mr = 228.25 | Dx = 1.808 Mg m−3 |
Orthorhombic, Pbn21 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P 2c -2ab | Cell parameters from 1606 reflections |
a = 6.0489 (5) Å | θ = 1.9–25.5° |
b = 12.8431 (11) Å | µ = 0.63 mm−1 |
c = 21.5830 (18) Å | T = 293 K |
V = 1676.7 (2) Å3 | Prism, colourless |
Z = 8 | 0.25 × 0.23 × 0.19 mm |
Bruker SMART CCD area-detector diffractometer | 1604 independent reflections |
Radiation source: fine-focus sealed tube | 1531 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.028 |
ϕ and ω scans | θmax = 25.5°, θmin = 1.9° |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | h = −7→7 |
Tmin = 0.858, Tmax = 0.890 | k = −15→15 |
8878 measured reflections | l = −25→25 |
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)] = 0.029 | H-atom parameters constrained |
wR(F2) = 0.078 | w = 1/[σ2(Fo2) + (0.0528P)2 + 0.284P] where P = (Fo2 + 2Fc2)/3 |
S = 1.07 | (Δ/σ)max < 0.001 |
1604 reflections | Δρmax = 0.29 e Å−3 |
235 parameters | Δρmin = −0.41 e Å−3 |
1 restraint | Absolute structure: Flack (1983), with 1497 Friedel pairs |
Primary atom site location: structure-invariant direct methods | Absolute structure parameter: 0.09 (9) |
C5H8O6S2 | V = 1676.7 (2) Å3 |
Mr = 228.25 | Z = 8 |
Orthorhombic, Pbn21 | Mo Kα radiation |
a = 6.0489 (5) Å | µ = 0.63 mm−1 |
b = 12.8431 (11) Å | T = 293 K |
c = 21.5830 (18) Å | 0.25 × 0.23 × 0.19 mm |
Bruker SMART CCD area-detector diffractometer | 1604 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | 1531 reflections with I > 2σ(I) |
Tmin = 0.858, Tmax = 0.890 | Rint = 0.028 |
8878 measured reflections |
R[F2 > 2σ(F2)] = 0.029 | H-atom parameters constrained |
wR(F2) = 0.078 | Δρmax = 0.29 e Å−3 |
S = 1.07 | Δρmin = −0.41 e Å−3 |
1604 reflections | Absolute structure: Flack (1983), with 1497 Friedel pairs |
235 parameters | Absolute structure parameter: 0.09 (9) |
1 restraint |
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 | 0.5760 (5) | 0.8962 (2) | −0.21898 (13) | 0.0267 (6) | |
C2 | 0.3243 (5) | 0.8908 (2) | −0.21098 (16) | 0.0320 (7) | |
H2A | 0.2803 | 0.9325 | −0.1756 | 0.038* | |
H2B | 0.2525 | 0.9189 | −0.2475 | 0.038* | |
C3 | 0.6435 (5) | 0.8264 (3) | −0.27315 (14) | 0.0336 (7) | |
H3A | 0.5837 | 0.8547 | −0.3113 | 0.040* | |
H3B | 0.8033 | 0.8258 | −0.2767 | 0.040* | |
C4 | 0.6446 (5) | 1.0070 (2) | −0.23563 (14) | 0.0331 (7) | |
H4A | 0.8011 | 1.0084 | −0.2453 | 0.040* | |
H4B | 0.5641 | 1.0296 | −0.2721 | 0.040* | |
C5 | 0.6937 (6) | 0.8619 (3) | −0.15935 (16) | 0.0332 (7) | |
H5A | 0.6417 | 0.7934 | −0.1472 | 0.040* | |
H5B | 0.8516 | 0.8576 | −0.1667 | 0.040* | |
C6 | 0.0841 (5) | 0.8707 (2) | 0.04429 (13) | 0.0282 (6) | |
C7 | 0.1496 (6) | 0.7587 (3) | 0.06034 (15) | 0.0380 (7) | |
H7A | 0.3062 | 0.7561 | 0.0699 | 0.046* | |
H7B | 0.0689 | 0.7363 | 0.0968 | 0.046* | |
C8 | 0.2024 (6) | 0.9046 (3) | −0.01531 (15) | 0.0317 (7) | |
H8A | 0.1525 | 0.9734 | −0.0273 | 0.038* | |
H8B | 0.3605 | 0.9077 | −0.0081 | 0.038* | |
C9 | 0.1562 (5) | 0.9395 (3) | 0.09843 (15) | 0.0366 (7) | |
H9A | 0.0991 | 0.9107 | 0.1368 | 0.044* | |
H9B | 0.3163 | 0.9397 | 0.1010 | 0.044* | |
C10 | −0.1658 (5) | 0.8766 (2) | 0.03668 (16) | 0.0344 (7) | |
H10A | −0.2105 | 0.8358 | 0.0010 | 0.041* | |
H10B | −0.2372 | 0.8477 | 0.0731 | 0.041* | |
O1 | 0.2555 (4) | 0.7835 (2) | −0.20175 (13) | 0.0391 (6) | |
O2 | 0.5638 (4) | 0.72017 (16) | −0.26492 (13) | 0.0393 (6) | |
O3 | 0.1990 (5) | 0.7482 (2) | −0.31274 (14) | 0.0511 (7) | |
O4 | 0.6503 (4) | 0.93608 (18) | −0.10970 (10) | 0.0384 (5) | |
O5 | 0.6001 (4) | 1.07751 (17) | −0.18509 (11) | 0.0383 (5) | |
O6 | 0.9676 (4) | 1.0477 (2) | −0.13830 (14) | 0.0483 (7) | |
O7 | 0.1022 (4) | 0.68874 (18) | 0.00930 (12) | 0.0414 (6) | |
O8 | 0.1555 (4) | 0.83071 (19) | −0.06494 (10) | 0.0380 (5) | |
O9 | 0.4707 (4) | 0.7194 (2) | −0.03627 (15) | 0.0532 (7) | |
O10 | 0.0777 (4) | 1.04518 (17) | 0.09141 (13) | 0.0430 (6) | |
O11 | −0.2349 (4) | 0.9845 (2) | 0.02836 (13) | 0.0424 (6) | |
O12 | −0.2837 (5) | 1.0115 (2) | 0.13974 (14) | 0.0618 (9) | |
S1 | 0.73630 (15) | 1.05361 (7) | −0.12165 (4) | 0.0379 (2) | |
S2 | 0.29956 (16) | 0.70421 (6) | −0.25830 (4) | 0.0384 (2) | |
S3 | 0.24084 (16) | 0.71310 (7) | −0.05390 (5) | 0.0399 (2) | |
S4 | −0.18731 (16) | 1.06085 (7) | 0.08585 (5) | 0.0446 (2) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0256 (15) | 0.0307 (15) | 0.0239 (14) | 0.0010 (11) | 0.0020 (11) | −0.0003 (11) |
C2 | 0.0286 (17) | 0.0333 (17) | 0.0340 (17) | 0.0035 (12) | 0.0030 (13) | −0.0055 (13) |
C3 | 0.0327 (16) | 0.0354 (17) | 0.0325 (17) | 0.0003 (13) | 0.0040 (12) | −0.0063 (12) |
C4 | 0.0368 (17) | 0.0334 (17) | 0.0292 (14) | −0.0013 (13) | 0.0011 (14) | 0.0015 (12) |
C5 | 0.0360 (17) | 0.0324 (15) | 0.0311 (16) | 0.0027 (13) | −0.0013 (14) | 0.0006 (14) |
C6 | 0.0305 (16) | 0.0303 (16) | 0.0240 (14) | −0.0022 (12) | 0.0025 (12) | −0.0006 (11) |
C7 | 0.0466 (19) | 0.0381 (18) | 0.0295 (15) | −0.0005 (15) | 0.0001 (15) | 0.0056 (14) |
C8 | 0.0369 (18) | 0.0316 (16) | 0.0265 (15) | −0.0014 (13) | 0.0059 (12) | −0.0014 (12) |
C9 | 0.0383 (18) | 0.0416 (17) | 0.0298 (16) | −0.0040 (14) | −0.0015 (14) | −0.0038 (14) |
C10 | 0.0281 (17) | 0.0380 (18) | 0.0370 (17) | −0.0043 (13) | 0.0031 (14) | −0.0091 (14) |
O1 | 0.0367 (14) | 0.0426 (14) | 0.0380 (14) | −0.0083 (9) | 0.0122 (9) | −0.0059 (11) |
O2 | 0.0417 (14) | 0.0312 (12) | 0.0451 (13) | 0.0043 (9) | 0.0050 (11) | −0.0058 (10) |
O3 | 0.0535 (16) | 0.0548 (17) | 0.0450 (15) | −0.0016 (13) | −0.0126 (12) | −0.0107 (12) |
O4 | 0.0460 (14) | 0.0413 (12) | 0.0278 (11) | −0.0029 (11) | 0.0013 (10) | −0.0014 (10) |
O5 | 0.0423 (13) | 0.0308 (12) | 0.0418 (12) | 0.0034 (9) | −0.0036 (11) | −0.0016 (10) |
O6 | 0.0351 (13) | 0.0505 (14) | 0.0594 (17) | −0.0048 (11) | −0.0049 (12) | −0.0102 (12) |
O7 | 0.0505 (15) | 0.0306 (12) | 0.0432 (13) | −0.0041 (10) | 0.0035 (12) | −0.0017 (10) |
O8 | 0.0489 (14) | 0.0418 (13) | 0.0232 (10) | 0.0043 (10) | 0.0018 (10) | −0.0021 (9) |
O9 | 0.0399 (15) | 0.0535 (16) | 0.0663 (19) | 0.0066 (12) | 0.0044 (14) | −0.0147 (13) |
O10 | 0.0471 (14) | 0.0375 (12) | 0.0445 (14) | −0.0105 (10) | 0.0045 (13) | −0.0094 (10) |
O11 | 0.0392 (15) | 0.0431 (14) | 0.0450 (15) | 0.0095 (10) | −0.0050 (10) | −0.0082 (12) |
O12 | 0.071 (2) | 0.0582 (19) | 0.056 (2) | −0.0121 (15) | 0.0297 (15) | −0.0165 (15) |
S1 | 0.0379 (5) | 0.0403 (4) | 0.0355 (5) | 0.0005 (4) | −0.0027 (3) | −0.0106 (4) |
S2 | 0.0431 (4) | 0.0326 (4) | 0.0397 (5) | −0.0040 (3) | 0.0036 (4) | −0.0059 (4) |
S3 | 0.0417 (5) | 0.0397 (5) | 0.0382 (5) | 0.0028 (3) | 0.0022 (3) | −0.0106 (4) |
S4 | 0.0476 (5) | 0.0371 (5) | 0.0492 (6) | 0.0018 (4) | 0.0103 (5) | −0.0122 (4) |
C1—C4 | 1.526 (4) | C7—H7B | 0.9700 |
C1—C3 | 1.528 (4) | C8—O8 | 1.458 (4) |
C1—C2 | 1.534 (4) | C8—H8A | 0.9700 |
C1—C5 | 1.535 (4) | C8—H8B | 0.9700 |
C2—O1 | 1.454 (4) | C9—O10 | 1.446 (4) |
C2—H2A | 0.9700 | C9—H9A | 0.9700 |
C2—H2B | 0.9700 | C9—H9B | 0.9700 |
C3—O2 | 1.458 (4) | C10—O11 | 1.458 (4) |
C3—H3A | 0.9700 | C10—H10A | 0.9700 |
C3—H3B | 0.9700 | C10—H10B | 0.9700 |
C4—O5 | 1.443 (4) | O1—S2 | 1.612 (3) |
C4—H4A | 0.9700 | O2—S2 | 1.618 (3) |
C4—H4B | 0.9700 | O3—S2 | 1.439 (3) |
C5—O4 | 1.458 (4) | O4—S1 | 1.617 (2) |
C5—H5A | 0.9700 | O5—S1 | 1.627 (3) |
C5—H5B | 0.9700 | O6—S1 | 1.446 (3) |
C6—C10 | 1.522 (4) | O7—S3 | 1.632 (3) |
C6—C9 | 1.528 (4) | O8—S3 | 1.614 (3) |
C6—C7 | 1.532 (4) | O9—S3 | 1.444 (3) |
C6—C8 | 1.535 (4) | O10—S4 | 1.620 (3) |
C7—O7 | 1.450 (4) | O11—S4 | 1.608 (3) |
C7—H7A | 0.9700 | O12—S4 | 1.447 (3) |
C4—C1—C3 | 107.1 (2) | C6—C7—H7B | 109.4 |
C4—C1—C2 | 109.8 (2) | H7A—C7—H7B | 108.0 |
C3—C1—C2 | 108.9 (2) | O8—C8—C6 | 109.9 (2) |
C4—C1—C5 | 109.8 (2) | O8—C8—H8A | 109.7 |
C3—C1—C5 | 110.5 (2) | C6—C8—H8A | 109.7 |
C2—C1—C5 | 110.7 (3) | O8—C8—H8B | 109.7 |
O1—C2—C1 | 110.0 (2) | C6—C8—H8B | 109.7 |
O1—C2—H2A | 109.7 | H8A—C8—H8B | 108.2 |
C1—C2—H2A | 109.7 | O10—C9—C6 | 111.6 (3) |
O1—C2—H2B | 109.7 | O10—C9—H9A | 109.3 |
C1—C2—H2B | 109.7 | C6—C9—H9A | 109.3 |
H2A—C2—H2B | 108.2 | O10—C9—H9B | 109.3 |
O2—C3—C1 | 111.5 (2) | C6—C9—H9B | 109.3 |
O2—C3—H3A | 109.3 | H9A—C9—H9B | 108.0 |
C1—C3—H3A | 109.3 | O11—C10—C6 | 110.2 (2) |
O2—C3—H3B | 109.3 | O11—C10—H10A | 109.6 |
C1—C3—H3B | 109.3 | C6—C10—H10A | 109.6 |
H3A—C3—H3B | 108.0 | O11—C10—H10B | 109.6 |
O5—C4—C1 | 110.9 (2) | C6—C10—H10B | 109.6 |
O5—C4—H4A | 109.5 | H10A—C10—H10B | 108.1 |
C1—C4—H4A | 109.5 | C2—O1—S2 | 116.6 (2) |
O5—C4—H4B | 109.5 | C3—O2—S2 | 117.12 (19) |
C1—C4—H4B | 109.5 | C5—O4—S1 | 115.8 (2) |
H4A—C4—H4B | 108.0 | C4—O5—S1 | 115.05 (18) |
O4—C5—C1 | 110.2 (2) | C7—O7—S3 | 114.5 (2) |
O4—C5—H5A | 109.6 | C8—O8—S3 | 116.0 (2) |
C1—C5—H5A | 109.6 | C9—O10—S4 | 116.69 (19) |
O4—C5—H5B | 109.6 | C10—O11—S4 | 115.7 (2) |
C1—C5—H5B | 109.6 | O6—S1—O4 | 107.55 (15) |
H5A—C5—H5B | 108.1 | O6—S1—O5 | 106.90 (16) |
C10—C6—C9 | 109.7 (3) | O4—S1—O5 | 98.48 (12) |
C10—C6—C7 | 109.1 (3) | O3—S2—O1 | 107.47 (16) |
C9—C6—C7 | 107.2 (3) | O3—S2—O2 | 107.21 (16) |
C10—C6—C8 | 111.0 (3) | O1—S2—O2 | 98.65 (12) |
C9—C6—C8 | 110.1 (2) | O9—S3—O8 | 107.12 (14) |
C7—C6—C8 | 109.6 (3) | O9—S3—O7 | 106.59 (18) |
O7—C7—C6 | 111.0 (3) | O8—S3—O7 | 97.95 (13) |
O7—C7—H7A | 109.4 | O12—S4—O11 | 106.32 (16) |
C6—C7—H7A | 109.4 | O12—S4—O10 | 106.55 (18) |
O7—C7—H7B | 109.4 | O11—S4—O10 | 99.11 (12) |
D—H···A | D—H | H···A | D···A | D—H···A |
C2—H2A···O6i | 0.97 | 2.53 | 3.343 (4) | 141 |
C10—H10A···O9i | 0.97 | 2.57 | 3.375 (4) | 141 |
C3—H3B···O3ii | 0.97 | 2.71 | 3.610 (4) | 155 |
C9—H9A···O2iii | 0.97 | 2.72 | 3.635 (4) | 159 |
Symmetry codes: (i) x−1, y, z; (ii) x+1, y, z; (iii) x−1/2, −y+3/2, z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C5H8O6S2 |
Mr | 228.25 |
Crystal system, space group | Orthorhombic, Pbn21 |
Temperature (K) | 293 |
a, b, c (Å) | 6.0489 (5), 12.8431 (11), 21.5830 (18) |
V (Å3) | 1676.7 (2) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.63 |
Crystal size (mm) | 0.25 × 0.23 × 0.19 |
Data collection | |
Diffractometer | Bruker SMART CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2005) |
Tmin, Tmax | 0.858, 0.890 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 8878, 1604, 1531 |
Rint | 0.028 |
(sin θ/λ)max (Å−1) | 0.606 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.029, 0.078, 1.07 |
No. of reflections | 1604 |
No. of parameters | 235 |
No. of restraints | 1 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.29, −0.41 |
Absolute structure | Flack (1983), with 1497 Friedel pairs |
Absolute structure parameter | 0.09 (9) |
Computer programs: SMART (Bruker, 2002), SAINT (Bruker, 2002), SAINT (Bruker, 2002, SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 1997), WinGX (Farrugia, 1999).
D—H···A | D—H | H···A | D···A | D—H···A |
C2—H2A···O6i | 0.97 | 2.53 | 3.343 (4) | 141.0 |
C10—H10A···O9i | 0.97 | 2.57 | 3.375 (4) | 140.6 |
C3—H3B···O3ii | 0.97 | 2.71 | 3.610 (4) | 155.1 |
C9—H9A···O2iii | 0.97 | 2.72 | 3.635 (4) | 158.5 |
Symmetry codes: (i) x−1, y, z; (ii) x+1, y, z; (iii) x−1/2, −y+3/2, z+1/2. |
Acknowledgements
The authors gratefully acknowledge the Natural Science Foundation of China (grant No. 20767001), the International Collaborative Project of Guizhou Province, the Governor Foundation of Guizhou Province and the Natural Science Youth Foundation of Guizhou University (grant No. 2007-005) for financial support.
References
Allen, F. H., Kennard, O., Watson, D. G., Brammer, L., Orpen, A. G. & Taylor, R. (1987). J. Chem. Soc. Perkin Trans. 2, pp. S1–19. CrossRef Web of Science Google Scholar
Bruker (2002). SMART and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Bruker (2005). SADABS. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Cremer, D. & Pople, J. A. (1975). J. Am. Chem. Soc. 97, 1354–1358. CrossRef CAS Web of Science Google Scholar
Farrugia, L. J. (1997). J. Appl. Cryst. 30, 565. CrossRef IUCr Journals Google Scholar
Farrugia, L. J. (1999). J. Appl. Cryst. 32, 837–838. CrossRef CAS IUCr Journals Google Scholar
Flack, H. D. (1983). Acta Cryst. A39, 876–881. CrossRef CAS Web of Science IUCr Journals Google Scholar
Jermy, B. R. & Pandurangan, A. (2005). Appl. Catal. A, 295, 185–192. CrossRef CAS Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
As part of our ongoing investigation into pentaerythritol compounds, we present an important intermediate in the synthesis of pesticides (Jermy & Pandurangan, 2005). The crystal structure determination of (I) has been carried out in order to elucidate the molecular conformation.
The crystal structure of the title compound, (I), consists of two spiro[5,5]undecane molecules (Fig. 1), in which the bond lengths are within normal ranges (Allen et al., 1987). The four six-membered rings are not planar and adopt chair conformations, with a total puckering amplitude, QT, of 0.607 (2) Å.
In the crystal structure, weak intermolecular C—H···O interactions, Table 1, together with close O5···S2 [dO···S = 3.315 (3)] and O6···S3 [dO···S = 3.308 (3)] contacts stabilize the packing.