| Literature DB >> 21583153 |
Abstract
In the title compound, C(8)H(12)O(4), the two carboxyl groups are on the same side of the cyclohexane ring and the ring adopts a chair conformation. Adjacent mol-ecules related by an inversion centre are linked by pairs of O-H⋯O hydrogen bonds, forming a zigzag chain along [1].Entities:
Year: 2009 PMID: 21583153 PMCID: PMC2969648 DOI: 10.1107/S1600536809016110
Source DB: PubMed Journal: Acta Crystallogr Sect E Struct Rep Online ISSN: 1600-5368
| C8H12O4 | |
| Triclinic, | |
| Hall symbol: -P 1 | Mo |
| Cell parameters from 3560 reflections | |
| θ = 2.6–26.9° | |
| µ = 0.11 mm−1 | |
| α = 82.505 (10)° | |
| β = 80.309 (11)° | Plate, colorless |
| γ = 81.875 (10)° | 0.24 × 0.20 × 0.10 mm |
| Bruker SMART CCD area-detector diffractometer | 1925 independent reflections |
| Radiation source: fine-focus sealed tube | 1222 reflections with |
| graphite | |
| φ and ω scans | θmax = 27.5°, θmin = 3.5° |
| Absorption correction: multi-scan ( | |
| 9807 measured reflections |
| Refinement on | Secondary atom site location: difference Fourier map |
| Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
| H atoms treated by a mixture of independent and constrained refinement | |
| (Δ/σ)max < 0.001 | |
| 1925 reflections | Δρmax = 0.27 e Å−3 |
| 118 parameters | Δρmin = −0.19 e Å−3 |
| 0 restraints | Extinction correction: |
| Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.057 (12) |
| 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 |
| O1 | 0.4359 (3) | 0.5154 (3) | 0.88398 (12) | 0.0583 (5) | |
| O2 | 0.2703 (4) | 0.2964 (3) | 1.01503 (13) | 0.0620 (5) | |
| O3 | 0.7370 (4) | −0.1284 (3) | 0.57741 (15) | 0.0709 (6) | |
| O4 | 0.8260 (3) | 0.2120 (3) | 0.55122 (14) | 0.0632 (5) | |
| C1 | 0.2929 (4) | 0.3798 (3) | 0.91784 (16) | 0.0386 (5) | |
| C2 | 0.1278 (4) | 0.2898 (4) | 0.85544 (16) | 0.0420 (5) | |
| H2 | −0.0488 | 0.3021 | 0.8932 | 0.050* | |
| C3 | 0.2176 (4) | 0.0476 (3) | 0.84796 (17) | 0.0457 (6) | |
| H3A | 0.2410 | −0.0240 | 0.9161 | 0.055* | |
| H3B | 0.0853 | −0.0174 | 0.8242 | 0.055* | |
| C4 | 0.1185 (4) | 0.4153 (4) | 0.74843 (17) | 0.0493 (6) | |
| H4A | −0.0264 | 0.3782 | 0.7208 | 0.059* | |
| H4B | 0.0878 | 0.5694 | 0.7557 | 0.059* | |
| C5 | 0.4695 (4) | 0.0121 (3) | 0.77409 (16) | 0.0411 (5) | |
| H5A | 0.5175 | −0.1420 | 0.7694 | 0.049* | |
| H5B | 0.6056 | 0.0664 | 0.8006 | 0.049* | |
| C6 | 0.3638 (4) | 0.3713 (4) | 0.67093 (17) | 0.0457 (6) | |
| H6A | 0.3350 | 0.4396 | 0.6028 | 0.055* | |
| H6B | 0.5029 | 0.4346 | 0.6907 | 0.055* | |
| C7 | 0.4420 (4) | 0.1286 (3) | 0.66664 (16) | 0.0411 (5) | |
| H7 | 0.3028 | 0.0710 | 0.6423 | 0.049* | |
| C8 | 0.6862 (4) | 0.0769 (4) | 0.59270 (16) | 0.0432 (5) | |
| H1 | 0.369 (7) | 0.355 (6) | 1.048 (3) | 0.106 (12)* | |
| H8 | 0.898 (8) | −0.163 (6) | 0.526 (3) | 0.128 (13)* |
| O1 | 0.0785 (12) | 0.0610 (11) | 0.0431 (9) | −0.0335 (10) | −0.0145 (8) | −0.0002 (8) |
| O2 | 0.0795 (13) | 0.0717 (12) | 0.0413 (10) | −0.0360 (10) | −0.0111 (9) | 0.0020 (8) |
| O3 | 0.0759 (13) | 0.0525 (11) | 0.0741 (13) | −0.0054 (9) | 0.0251 (10) | −0.0191 (9) |
| O4 | 0.0571 (11) | 0.0595 (11) | 0.0685 (12) | −0.0124 (9) | 0.0167 (9) | −0.0190 (9) |
| C1 | 0.0371 (11) | 0.0377 (11) | 0.0396 (12) | −0.0004 (9) | −0.0016 (9) | −0.0091 (9) |
| C2 | 0.0299 (10) | 0.0512 (13) | 0.0452 (12) | −0.0048 (9) | 0.0017 (9) | −0.0163 (10) |
| C3 | 0.0454 (12) | 0.0447 (13) | 0.0476 (13) | −0.0145 (10) | 0.0045 (10) | −0.0131 (10) |
| C4 | 0.0422 (12) | 0.0544 (14) | 0.0531 (14) | 0.0066 (10) | −0.0150 (10) | −0.0168 (11) |
| C5 | 0.0437 (12) | 0.0358 (11) | 0.0422 (12) | −0.0034 (9) | 0.0003 (9) | −0.0084 (9) |
| C6 | 0.0490 (13) | 0.0490 (13) | 0.0378 (12) | 0.0017 (10) | −0.0098 (10) | −0.0038 (10) |
| C7 | 0.0377 (11) | 0.0491 (13) | 0.0383 (11) | −0.0058 (9) | −0.0051 (9) | −0.0122 (9) |
| C8 | 0.0450 (12) | 0.0483 (14) | 0.0366 (11) | −0.0024 (10) | −0.0057 (9) | −0.0097 (10) |
| O1—C1 | 1.209 (2) | C3—H3B | 0.9700 |
| O2—C1 | 1.312 (3) | C4—C6 | 1.527 (3) |
| O2—H1 | 0.88 (4) | C4—H4A | 0.9700 |
| O3—C8 | 1.310 (3) | C4—H4B | 0.9700 |
| O3—H8 | 1.01 (4) | C5—C7 | 1.526 (3) |
| O4—C8 | 1.217 (3) | C5—H5A | 0.9700 |
| C1—C2 | 1.503 (3) | C5—H5B | 0.9700 |
| C2—C4 | 1.528 (3) | C6—C7 | 1.523 (3) |
| C2—C3 | 1.534 (3) | C6—H6A | 0.9700 |
| C2—H2 | 0.9800 | C6—H6B | 0.9700 |
| C3—C5 | 1.520 (3) | C7—C8 | 1.505 (3) |
| C3—H3A | 0.9700 | C7—H7 | 0.9800 |
| C1—O2—H1 | 110 (2) | H4A—C4—H4B | 107.6 |
| C8—O3—H8 | 114 (2) | C3—C5—C7 | 110.71 (18) |
| O1—C1—O2 | 121.6 (2) | C3—C5—H5A | 109.5 |
| O1—C1—C2 | 124.7 (2) | C7—C5—H5A | 109.5 |
| O2—C1—C2 | 113.66 (19) | C3—C5—H5B | 109.5 |
| C1—C2—C4 | 113.11 (18) | C7—C5—H5B | 109.5 |
| C1—C2—C3 | 109.99 (18) | H5A—C5—H5B | 108.1 |
| C4—C2—C3 | 111.41 (17) | C7—C6—C4 | 111.18 (19) |
| C1—C2—H2 | 107.3 | C7—C6—H6A | 109.4 |
| C4—C2—H2 | 107.3 | C4—C6—H6A | 109.4 |
| C3—C2—H2 | 107.3 | C7—C6—H6B | 109.4 |
| C5—C3—C2 | 111.67 (17) | C4—C6—H6B | 109.4 |
| C5—C3—H3A | 109.3 | H6A—C6—H6B | 108.0 |
| C2—C3—H3A | 109.3 | C8—C7—C6 | 113.13 (18) |
| C5—C3—H3B | 109.3 | C8—C7—C5 | 109.85 (18) |
| C2—C3—H3B | 109.3 | C6—C7—C5 | 111.08 (17) |
| H3A—C3—H3B | 107.9 | C8—C7—H7 | 107.5 |
| C6—C4—C2 | 114.13 (18) | C6—C7—H7 | 107.5 |
| C6—C4—H4A | 108.7 | C5—C7—H7 | 107.5 |
| C2—C4—H4A | 108.7 | O4—C8—O3 | 122.7 (2) |
| C6—C4—H4B | 108.7 | O4—C8—C7 | 123.5 (2) |
| C2—C4—H4B | 108.7 | O3—C8—C7 | 113.8 (2) |
| O1—C1—C2—C4 | −10.6 (3) | C2—C4—C6—C7 | 51.0 (2) |
| O2—C1—C2—C4 | 169.74 (18) | C4—C6—C7—C8 | −178.86 (18) |
| O1—C1—C2—C3 | 114.7 (2) | C4—C6—C7—C5 | −54.8 (2) |
| O2—C1—C2—C3 | −65.0 (2) | C3—C5—C7—C8 | −175.50 (17) |
| C1—C2—C3—C5 | −74.0 (2) | C3—C5—C7—C6 | 58.6 (2) |
| C4—C2—C3—C5 | 52.3 (2) | C6—C7—C8—O4 | 9.4 (3) |
| C1—C2—C4—C6 | 74.9 (2) | C5—C7—C8—O4 | −115.3 (2) |
| C3—C2—C4—C6 | −49.6 (2) | C6—C7—C8—O3 | −171.16 (19) |
| C2—C3—C5—C7 | −57.3 (2) | C5—C7—C8—O3 | 64.1 (2) |
| H··· | ||||
| O2—H1···O1i | 0.88 (4) | 1.81 (4) | 2.684 (2) | 178 (4) |
| O3—H8···O4ii | 1.01 (4) | 1.65 (4) | 2.658 (2) | 175 (4) |
Hydrogen-bond geometry (Å, °)
| H⋯ | ||||
|---|---|---|---|---|
| O2—H1⋯O1i | 0.88 (4) | 1.81 (4) | 2.684 (2) | 178 (4) |
| O3—H8⋯O4ii | 1.01 (4) | 1.65 (4) | 2.658 (2) | 175 (4) |
Symmetry codes: (i) ; (ii) .