Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536807041554/bt2457sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S1600536807041554/bt2457Isup2.hkl |
CCDC reference: 660372
The title compound was prepared according to a published procedure (Gauerke & Marvel, 1928) upon reaction of cyclohexyl magnesium bromide with diethyl oxalate. Crystals suitable for X-ray analysis were directly obtained from the crystallized reaction product.
All H atoms were located in a difference map and refined as riding on their parent atoms. H atoms bonded to C atoms were positioned geometrically and allowed to ride on their parent atoms at distances of C—H = 0.98 Å with Uiso(H) = 1.5Ueq(C) for methyl H, C—H = 0.99 Å with Uiso(H) = 1.2Ueq(C) for methylene H, and C—H = 1.00 Å with Uiso(H) = 1.2Ueq(C) for methine H. The H atom bonded to the O atom was positioned geometrically and allowed to ride on its parent atom at a distance of O—H = 0.84 Å with Uiso(H) = 1.5Ueq(O).
The title compound, C16H28O3, was prepared as an intermediate in the synthesis of dicyclohexylglycolic acid. It was obtained upon reaction of cyclohexyl magnesium bromide with diethyl oxalate.
The cyclohexyl rings invariably adopt chair conformations. Intramolecular hydrogen bonds between the O-bonded H atom and the double-bonded O atom are present in the crystal structure.
The molecular structure (Fig. 1) shows two cyclohexyl rings, a hydroxy group and a carboxy group attached to the central C atom.
The molecular packing is shown in Figure 2.
The title compound was prepared according to a published procedure (Gauerke & Marvel, 1928).
Data collection: CrysAlis CCD (Oxford Diffraction, 2005); cell refinement: CrysAlis CCD; data reduction: CrysAlis CCD or RED? (Oxford Diffraction, 2005); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: ORTEPIII (Burnett & Johnson, 1996); software used to prepare material for publication: SHELXL97.
C16H28O3 | Z = 4 |
Mr = 268.39 | F(000) = 592 |
Monoclinic, P21/c | Dx = 1.152 Mg m−3 |
Hall symbol: -P 2ybc | Mo Kα radiation, λ = 0.71073 Å |
a = 8.873 (2) Å | θ = 3.8–27.5° |
b = 23.121 (3) Å | µ = 0.08 mm−1 |
c = 8.4300 (14) Å | T = 200 K |
β = 116.475 (15)° | Platelet, colourless |
V = 1548.1 (5) Å3 | 0.35 × 0.35 × 0.11 mm |
Nonius KappaCCD diffractometer | 2649 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.040 |
Graphite monochromator | θmax = 27.5°, θmin = 3.8° |
ω scans | h = −6→11 |
9044 measured reflections | k = −27→30 |
3563 independent reflections | l = −10→9 |
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)] = 0.063 | Hydrogen site location: difference Fourier map |
wR(F2) = 0.147 | H-atom parameters constrained |
S = 1.09 | w = 1/[σ2(Fo2) + (0.0525P)2] where P = (Fo2 + 2Fc2)/3 |
3563 reflections | (Δ/σ)max < 0.001 |
172 parameters | Δρmax = 0.28 e Å−3 |
0 restraints | Δρmin = −0.19 e Å−3 |
C16H28O3 | V = 1548.1 (5) Å3 |
Mr = 268.39 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 8.873 (2) Å | µ = 0.08 mm−1 |
b = 23.121 (3) Å | T = 200 K |
c = 8.4300 (14) Å | 0.35 × 0.35 × 0.11 mm |
β = 116.475 (15)° |
Nonius KappaCCD diffractometer | 2649 reflections with I > 2σ(I) |
9044 measured reflections | Rint = 0.040 |
3563 independent reflections |
R[F2 > 2σ(F2)] = 0.063 | 0 restraints |
wR(F2) = 0.147 | H-atom parameters constrained |
S = 1.09 | Δρmax = 0.28 e Å−3 |
3563 reflections | Δρmin = −0.19 e Å−3 |
172 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 | ||
O12 | 0.35070 (15) | 0.17755 (5) | 0.07234 (17) | 0.0391 (3) | |
H12 | 0.3048 | 0.2097 | 0.0338 | 0.059* | |
O111 | 0.09969 (18) | 0.23581 (6) | 0.0822 (2) | 0.0499 (4) | |
O112 | 0.01746 (14) | 0.16183 (5) | 0.19875 (17) | 0.0349 (3) | |
C11 | 0.1170 (2) | 0.18694 (7) | 0.1387 (2) | 0.0332 (4) | |
C12 | 0.2577 (2) | 0.14687 (7) | 0.1467 (2) | 0.0295 (4) | |
C13 | −0.1205 (2) | 0.19669 (8) | 0.1969 (3) | 0.0382 (5) | |
H131 | −0.2067 | 0.2032 | 0.0735 | 0.046* | |
H132 | −0.0780 | 0.2347 | 0.2530 | 0.046* | |
C14 | −0.1940 (3) | 0.16416 (10) | 0.2978 (4) | 0.0573 (6) | |
H141 | −0.2931 | 0.1848 | 0.2913 | 0.086* | |
H142 | −0.1102 | 0.1608 | 0.4219 | 0.086* | |
H143 | −0.2273 | 0.1255 | 0.2466 | 0.086* | |
C21 | 0.3843 (2) | 0.13388 (7) | 0.3428 (2) | 0.0285 (4) | |
H21 | 0.4891 | 0.1192 | 0.3401 | 0.034* | |
C22 | 0.4345 (2) | 0.18909 (7) | 0.4551 (2) | 0.0355 (4) | |
H221 | 0.4702 | 0.2188 | 0.3943 | 0.043* | |
H222 | 0.3357 | 0.2043 | 0.4670 | 0.043* | |
C23 | 0.5776 (2) | 0.17780 (8) | 0.6391 (3) | 0.0446 (5) | |
H231 | 0.6801 | 0.1665 | 0.6278 | 0.053* | |
H232 | 0.6028 | 0.2138 | 0.7100 | 0.053* | |
C24 | 0.5322 (3) | 0.13022 (9) | 0.7343 (3) | 0.0475 (5) | |
H241 | 0.4406 | 0.1439 | 0.7616 | 0.057* | |
H242 | 0.6312 | 0.1213 | 0.8477 | 0.057* | |
C25 | 0.4757 (2) | 0.07563 (8) | 0.6223 (2) | 0.0377 (4) | |
H251 | 0.4384 | 0.0467 | 0.6840 | 0.045* | |
H252 | 0.5723 | 0.0591 | 0.6090 | 0.045* | |
C26 | 0.3317 (2) | 0.08747 (7) | 0.4385 (2) | 0.0320 (4) | |
H261 | 0.2312 | 0.1007 | 0.4504 | 0.038* | |
H262 | 0.3020 | 0.0514 | 0.3680 | 0.038* | |
C31 | 0.1795 (2) | 0.09223 (7) | 0.0338 (2) | 0.0286 (4) | |
H31 | 0.1194 | 0.0703 | 0.0907 | 0.034* | |
C32 | 0.3153 (2) | 0.05253 (7) | 0.0273 (2) | 0.0327 (4) | |
H321 | 0.3784 | 0.0738 | −0.0259 | 0.039* | |
H322 | 0.3957 | 0.0415 | 0.1495 | 0.039* | |
C33 | 0.2383 (2) | −0.00201 (8) | −0.0810 (2) | 0.0375 (4) | |
H331 | 0.3285 | −0.0255 | −0.0879 | 0.045* | |
H332 | 0.1860 | −0.0254 | −0.0204 | 0.045* | |
C34 | 0.1058 (2) | 0.01237 (9) | −0.2680 (2) | 0.0415 (5) | |
H341 | 0.1609 | 0.0307 | −0.3347 | 0.050* | |
H342 | 0.0514 | −0.0238 | −0.3301 | 0.050* | |
C35 | −0.0276 (2) | 0.05302 (8) | −0.2645 (2) | 0.0391 (5) | |
H351 | −0.0936 | 0.0326 | −0.2131 | 0.047* | |
H352 | −0.1058 | 0.0643 | −0.3873 | 0.047* | |
C36 | 0.0509 (2) | 0.10733 (8) | −0.1559 (2) | 0.0365 (4) | |
H361 | −0.0389 | 0.1318 | −0.1520 | 0.044* | |
H362 | 0.1073 | 0.1298 | −0.2141 | 0.044* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O12 | 0.0400 (7) | 0.0345 (7) | 0.0466 (8) | −0.0015 (5) | 0.0229 (6) | 0.0110 (6) |
O111 | 0.0523 (9) | 0.0335 (7) | 0.0649 (10) | 0.0134 (6) | 0.0270 (8) | 0.0167 (7) |
O112 | 0.0307 (6) | 0.0312 (6) | 0.0443 (7) | 0.0069 (5) | 0.0181 (6) | 0.0031 (5) |
C11 | 0.0316 (9) | 0.0288 (9) | 0.0340 (9) | 0.0035 (7) | 0.0099 (8) | 0.0027 (7) |
C12 | 0.0273 (9) | 0.0284 (8) | 0.0339 (9) | 0.0010 (6) | 0.0147 (7) | 0.0057 (7) |
C13 | 0.0291 (9) | 0.0373 (10) | 0.0437 (11) | 0.0085 (7) | 0.0121 (8) | −0.0043 (8) |
C14 | 0.0485 (13) | 0.0487 (13) | 0.0897 (18) | 0.0056 (10) | 0.0443 (13) | 0.0014 (12) |
C21 | 0.0239 (8) | 0.0253 (8) | 0.0336 (9) | 0.0019 (6) | 0.0105 (7) | 0.0026 (7) |
C22 | 0.0363 (10) | 0.0265 (9) | 0.0409 (10) | −0.0024 (7) | 0.0145 (8) | −0.0006 (7) |
C23 | 0.0422 (11) | 0.0403 (11) | 0.0425 (11) | −0.0084 (8) | 0.0110 (9) | −0.0069 (9) |
C24 | 0.0498 (12) | 0.0508 (12) | 0.0340 (10) | −0.0027 (9) | 0.0116 (9) | −0.0019 (9) |
C25 | 0.0346 (10) | 0.0385 (10) | 0.0365 (10) | 0.0039 (8) | 0.0128 (8) | 0.0080 (8) |
C26 | 0.0299 (9) | 0.0290 (9) | 0.0345 (9) | −0.0016 (7) | 0.0121 (8) | 0.0030 (7) |
C31 | 0.0259 (8) | 0.0309 (9) | 0.0286 (9) | 0.0025 (6) | 0.0119 (7) | 0.0030 (7) |
C32 | 0.0275 (9) | 0.0373 (10) | 0.0320 (9) | 0.0052 (7) | 0.0121 (7) | 0.0024 (7) |
C33 | 0.0361 (10) | 0.0394 (10) | 0.0386 (10) | 0.0044 (8) | 0.0181 (8) | −0.0027 (8) |
C34 | 0.0411 (11) | 0.0502 (11) | 0.0339 (10) | −0.0021 (8) | 0.0173 (9) | −0.0044 (8) |
C35 | 0.0326 (10) | 0.0500 (11) | 0.0299 (9) | −0.0016 (8) | 0.0097 (8) | 0.0006 (8) |
C36 | 0.0291 (9) | 0.0427 (10) | 0.0327 (9) | 0.0060 (7) | 0.0093 (8) | 0.0065 (8) |
O12—C12 | 1.428 (2) | C24—H241 | 0.9900 |
O12—H12 | 0.8400 | C24—H242 | 0.9900 |
O111—C11 | 1.209 (2) | C25—C26 | 1.531 (2) |
O112—C11 | 1.332 (2) | C25—H251 | 0.9900 |
O112—C13 | 1.460 (2) | C25—H252 | 0.9900 |
C11—C12 | 1.531 (2) | C26—H261 | 0.9900 |
C12—C31 | 1.548 (2) | C26—H262 | 0.9900 |
C12—C21 | 1.558 (2) | C31—C36 | 1.534 (2) |
C13—C14 | 1.486 (3) | C31—C32 | 1.535 (2) |
C13—H131 | 0.9900 | C31—H31 | 1.0000 |
C13—H132 | 0.9900 | C32—C33 | 1.528 (2) |
C14—H141 | 0.9800 | C32—H321 | 0.9900 |
C14—H142 | 0.9800 | C32—H322 | 0.9900 |
C14—H143 | 0.9800 | C33—C34 | 1.525 (3) |
C21—C22 | 1.532 (2) | C33—H331 | 0.9900 |
C21—C26 | 1.535 (2) | C33—H332 | 0.9900 |
C21—H21 | 1.0000 | C34—C35 | 1.522 (3) |
C22—C23 | 1.526 (3) | C34—H341 | 0.9900 |
C22—H221 | 0.9900 | C34—H342 | 0.9900 |
C22—H222 | 0.9900 | C35—C36 | 1.527 (3) |
C23—C24 | 1.518 (3) | C35—H351 | 0.9900 |
C23—H231 | 0.9900 | C35—H352 | 0.9900 |
C23—H232 | 0.9900 | C36—H361 | 0.9900 |
C24—C25 | 1.521 (3) | C36—H362 | 0.9900 |
C12—O12—H12 | 109.5 | C24—C25—H251 | 109.2 |
C11—O112—C13 | 116.77 (14) | C26—C25—H251 | 109.2 |
O111—C11—O112 | 124.58 (17) | C24—C25—H252 | 109.2 |
O111—C11—C12 | 122.76 (17) | C26—C25—H252 | 109.2 |
O112—C11—C12 | 112.65 (14) | H251—C25—H252 | 107.9 |
O12—C12—C11 | 107.41 (13) | C25—C26—C21 | 110.19 (14) |
O12—C12—C31 | 108.86 (14) | C25—C26—H261 | 109.6 |
C11—C12—C31 | 109.50 (13) | C21—C26—H261 | 109.6 |
O12—C12—C21 | 106.08 (13) | C25—C26—H262 | 109.6 |
C11—C12—C21 | 110.59 (14) | C21—C26—H262 | 109.6 |
C31—C12—C21 | 114.13 (13) | H261—C26—H262 | 108.1 |
O112—C13—C14 | 107.11 (15) | C36—C31—C32 | 109.26 (14) |
O112—C13—H131 | 110.3 | C36—C31—C12 | 112.13 (14) |
C14—C13—H131 | 110.3 | C32—C31—C12 | 111.50 (13) |
O112—C13—H132 | 110.3 | C36—C31—H31 | 107.9 |
C14—C13—H132 | 110.3 | C32—C31—H31 | 107.9 |
H131—C13—H132 | 108.5 | C12—C31—H31 | 107.9 |
C13—C14—H141 | 109.5 | C33—C32—C31 | 111.48 (14) |
C13—C14—H142 | 109.5 | C33—C32—H321 | 109.3 |
H141—C14—H142 | 109.5 | C31—C32—H321 | 109.3 |
C13—C14—H143 | 109.5 | C33—C32—H322 | 109.3 |
H141—C14—H143 | 109.5 | C31—C32—H322 | 109.3 |
H142—C14—H143 | 109.5 | H321—C32—H322 | 108.0 |
C22—C21—C26 | 109.31 (15) | C34—C33—C32 | 111.78 (15) |
C22—C21—C12 | 111.60 (13) | C34—C33—H331 | 109.3 |
C26—C21—C12 | 116.61 (13) | C32—C33—H331 | 109.3 |
C22—C21—H21 | 106.2 | C34—C33—H332 | 109.3 |
C26—C21—H21 | 106.2 | C32—C33—H332 | 109.3 |
C12—C21—H21 | 106.2 | H331—C33—H332 | 107.9 |
C23—C22—C21 | 111.49 (14) | C35—C34—C33 | 111.27 (15) |
C23—C22—H221 | 109.3 | C35—C34—H341 | 109.4 |
C21—C22—H221 | 109.3 | C33—C34—H341 | 109.4 |
C23—C22—H222 | 109.3 | C35—C34—H342 | 109.4 |
C21—C22—H222 | 109.3 | C33—C34—H342 | 109.4 |
H221—C22—H222 | 108.0 | H341—C34—H342 | 108.0 |
C24—C23—C22 | 111.36 (15) | C34—C35—C36 | 111.61 (15) |
C24—C23—H231 | 109.4 | C34—C35—H351 | 109.3 |
C22—C23—H231 | 109.4 | C36—C35—H351 | 109.3 |
C24—C23—H232 | 109.4 | C34—C35—H352 | 109.3 |
C22—C23—H232 | 109.4 | C36—C35—H352 | 109.3 |
H231—C23—H232 | 108.0 | H351—C35—H352 | 108.0 |
C23—C24—C25 | 111.41 (17) | C35—C36—C31 | 111.50 (15) |
C23—C24—H241 | 109.3 | C35—C36—H361 | 109.3 |
C25—C24—H241 | 109.3 | C31—C36—H361 | 109.3 |
C23—C24—H242 | 109.3 | C35—C36—H362 | 109.3 |
C25—C24—H242 | 109.3 | C31—C36—H362 | 109.3 |
H241—C24—H242 | 108.0 | H361—C36—H362 | 108.0 |
C24—C25—C26 | 112.03 (15) | ||
C13—O112—C11—O111 | −0.7 (3) | C23—C24—C25—C26 | −54.3 (2) |
C13—O112—C11—C12 | 179.84 (14) | C24—C25—C26—C21 | 56.8 (2) |
O111—C11—C12—O12 | −1.9 (2) | C22—C21—C26—C25 | −57.80 (18) |
O112—C11—C12—O12 | 177.55 (13) | C12—C21—C26—C25 | 174.47 (14) |
O111—C11—C12—C31 | −120.01 (19) | O12—C12—C31—C36 | −63.89 (17) |
O112—C11—C12—C31 | 59.49 (19) | C11—C12—C31—C36 | 53.26 (19) |
O111—C11—C12—C21 | 113.39 (19) | C21—C12—C31—C36 | 177.83 (14) |
O112—C11—C12—C21 | −67.11 (18) | O12—C12—C31—C32 | 58.99 (17) |
C11—O112—C13—C14 | −170.11 (16) | C11—C12—C31—C32 | 176.15 (14) |
O12—C12—C21—C22 | 69.68 (17) | C21—C12—C31—C32 | −59.29 (19) |
C11—C12—C21—C22 | −46.49 (19) | C36—C31—C32—C33 | −56.70 (19) |
C31—C12—C21—C22 | −170.47 (14) | C12—C31—C32—C33 | 178.79 (14) |
O12—C12—C21—C26 | −163.72 (14) | C31—C32—C33—C34 | 55.8 (2) |
C11—C12—C21—C26 | 80.12 (18) | C32—C33—C34—C35 | −53.8 (2) |
C31—C12—C21—C26 | −43.9 (2) | C33—C34—C35—C36 | 54.0 (2) |
C26—C21—C22—C23 | 58.06 (19) | C34—C35—C36—C31 | −56.4 (2) |
C12—C21—C22—C23 | −171.45 (15) | C32—C31—C36—C35 | 57.01 (19) |
C21—C22—C23—C24 | −56.1 (2) | C12—C31—C36—C35 | −178.85 (15) |
C22—C23—C24—C25 | 53.5 (2) |
Experimental details
Crystal data | |
Chemical formula | C16H28O3 |
Mr | 268.39 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 200 |
a, b, c (Å) | 8.873 (2), 23.121 (3), 8.4300 (14) |
β (°) | 116.475 (15) |
V (Å3) | 1548.1 (5) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.08 |
Crystal size (mm) | 0.35 × 0.35 × 0.11 |
Data collection | |
Diffractometer | Nonius KappaCCD |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 9044, 3563, 2649 |
Rint | 0.040 |
(sin θ/λ)max (Å−1) | 0.650 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.063, 0.147, 1.09 |
No. of reflections | 3563 |
No. of parameters | 172 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.28, −0.19 |
Computer programs: CrysAlis CCD (Oxford Diffraction, 2005), CrysAlis CCD or RED? (Oxford Diffraction, 2005), SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), ORTEPIII (Burnett & Johnson, 1996), SHELXL97.
The title compound, C16H28O3, was prepared as an intermediate in the synthesis of dicyclohexylglycolic acid. It was obtained upon reaction of cyclohexyl magnesium bromide with diethyl oxalate.
The cyclohexyl rings invariably adopt chair conformations. Intramolecular hydrogen bonds between the O-bonded H atom and the double-bonded O atom are present in the crystal structure.
The molecular structure (Fig. 1) shows two cyclohexyl rings, a hydroxy group and a carboxy group attached to the central C atom.
The molecular packing is shown in Figure 2.