organic compounds
2,8-Dimethyltricyclo[5.3.1.13,9]dodecane-syn-2,syn-8-diol–propanoic acid (1/1)
aSchool of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
*Correspondence e-mail: m.scudder@unsw.edu.au
The racemic title compound, C14H24O2·C3H6O2, crystallizes in the monoclinic P21/c as a 1:1 diol/carboxylic acid cocrystal, A–B. The lattice incorporates infinite chains of the alcohol–carboxylic acid–alcohol supramolecular synthon, (⋯O—H⋯O=C(R)—O—H⋯O—H⋯), in which the hydrogen-bonded molecules (A—B—A)n surround a pseudo-threefold screw axis. The carboxylic acid group functions like an extended alcohol hydroxy group. Each diol, A, takes part in two such threefold screw arrangements, leading to a hydrogen-bonded layer structure, with adjacent layers containing diol molecules of opposite handedness. The central C atom of the propano bridge is disordered over two sites of occupancies 0.75 (1) and 0.25 (1). The methyl group of the propanoic acid molecule is disordered over two sites of occupancies 0.68 (1) and 0.32 (1).
Related literature
For related literature on the diol component of the title compound, see: Bishop (2009); Dance et al. (1986). Two members of this diol family have been found previously to form such 1:1 compounds with see: Alshahateet et al. (2004); Yue et al. (2006).
Experimental
Crystal data
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Data collection
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Refinement
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Data collection: CAD-4 Software (Enraf–Nonius, 1989); cell CAD-4 Software; data reduction: local program; program(s) used to solve structure: SIR92 (Altomare et al., 1994); program(s) used to refine structure: RAELS (Rae, 2000); molecular graphics: ORTEP-3 (Farrugia, 1997) and CrystalMaker (Palmer, 2005); software used to prepare material for publication: local programs.
Supporting information
10.1107/S1600536809016547/hg2504sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536809016547/hg2504Isup2.hkl
Racemic 2,8-dimethyltricyclo[5.3.1.13,9]dodecane-syn-2,syn-8-diol was prepared as described (Dance et al., 1986) and the X-ray quality co-crystals obtained by slow concentration of a propanoic acid solution.
The central C atom of the propano bridge (C13) was disordered over two sites of occupancies 0.75 (1) and 0.25. For the propanoic acid molecules, the methyl group, C3P, was disordered over two sites of occupancies 0.68 (1) and 0.32. H atoms attached to C were included at calculated positions (C—H = 1.0 Å). The disorder of C13 was taken into account when calculating the H atom positions and occupancies for C13 and the adjacent C12 and C14. The hydroxy H atoms were located on a difference map, and were then fixed at a position along the O···O vector with O—H = 1.0 Å. All H atoms were refined with isotropic thermal parameters equivalent to those of the atom to which they were bonded.
Data collection: CAD-4 Software (Enraf–Nonius, 1989); cell
CAD-4 Softwar (Enraf–Nonius, 1989); data reduction: local program; program(s) used to solve structure: SIR92 (Altomare et al., 1994); program(s) used to refine structure: RAELS (Rae, 2000); molecular graphics: ORTEP-3 (Farrugia, 1997) and CrystalMaker (Palmer, 2005); software used to prepare material for publication: local programs.C14H24O2·C3H6O2 | F(000) = 656.0 |
Mr = 298.4 | Dx = 1.17 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
a = 7.390 (4) Å | Cell parameters from 11 reflections |
b = 13.218 (5) Å | θ = 11–12° |
c = 18.469 (8) Å | µ = 0.08 mm−1 |
β = 110.23 (2)° | T = 294 K |
V = 1693 (1) Å3 | Irregular, colourless |
Z = 4 | 0.10 mm (radius) |
Enraf–Nonius CAD-4 diffractometer | θmax = 25° |
ω/2θ scans | h = 0→8 |
3188 measured reflections | k = 0→15 |
2942 independent reflections | l = −22→22 |
1786 reflections with I > 2σ(I) | 1 standard reflections every 30 min |
Rint = 0.014 | intensity decay: 29% |
Refinement on F | 0 restraints |
R[F2 > 2σ(F2)] = 0.056 | H-atom parameters constrained |
wR(F2) = 0.070 | w = 1/[σ2(F) + 0.0004F2] |
S = 1.32 | (Δ/σ)max = 0.003 |
2942 reflections | Δρmax = 0.39 e Å−3 |
199 parameters | Δρmin = −0.41 e Å−3 |
C14H24O2·C3H6O2 | V = 1693 (1) Å3 |
Mr = 298.4 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 7.390 (4) Å | µ = 0.08 mm−1 |
b = 13.218 (5) Å | T = 294 K |
c = 18.469 (8) Å | 0.10 mm (radius) |
β = 110.23 (2)° |
Enraf–Nonius CAD-4 diffractometer | Rint = 0.014 |
3188 measured reflections | 1 standard reflections every 30 min |
2942 independent reflections | intensity decay: 29% |
1786 reflections with I > 2σ(I) |
R[F2 > 2σ(F2)] = 0.056 | 0 restraints |
wR(F2) = 0.070 | H-atom parameters constrained |
S = 1.32 | Δρmax = 0.39 e Å−3 |
2942 reflections | Δρmin = −0.41 e Å−3 |
199 parameters |
x | y | z | Uiso*/Ueq | Occ. (<1) | |
O1 | 0.7617 (2) | 0.2866 (1) | 0.2685 (1) | 0.0659 (5) | |
O2 | 0.4331 (2) | 0.66382 (11) | 0.16336 (9) | 0.0559 (5) | |
C1 | 0.4896 (3) | 0.3428 (2) | 0.1636 (1) | 0.0495 (6) | |
C2 | 0.7107 (3) | 0.3385 (2) | 0.1951 (1) | 0.0496 (6) | |
C3 | 0.8088 (3) | 0.4441 (2) | 0.2035 (1) | 0.0513 (6) | |
C4 | 0.6996 (3) | 0.5155 (2) | 0.1356 (1) | 0.0503 (6) | |
C5 | 0.4789 (3) | 0.5105 (2) | 0.1032 (1) | 0.0475 (6) | |
C6 | 0.3662 (3) | 0.5599 (2) | 0.1493 (1) | 0.0472 (6) | |
C7 | 0.3899 (3) | 0.5039 (2) | 0.2262 (1) | 0.0528 (6) | |
C8 | 0.3898 (4) | 0.3878 (2) | 0.2161 (1) | 0.0579 (7) | |
C9 | 0.4195 (3) | 0.4001 (2) | 0.0871 (1) | 0.0536 (6) | |
C10 | 0.7824 (4) | 0.2728 (2) | 0.1425 (2) | 0.0718 (8) | |
C11 | 0.1519 (4) | 0.5658 (2) | 0.1009 (2) | 0.0656 (8) | |
C12 | 0.8701 (4) | 0.4943 (2) | 0.2831 (2) | 0.0695 (8) | |
C13 | 0.7455 (5) | 0.5768 (3) | 0.2979 (2) | 0.067 (1) | 0.75 |
C13' | 0.7388 (9) | 0.4872 (7) | 0.3304 (4) | 0.067 (1) | 0.25 |
C14 | 0.5481 (5) | 0.5443 (2) | 0.2994 (1) | 0.0707 (8) | |
O1P | 0.5377 (3) | 0.7775 (1) | 0.0674 (1) | 0.0740 (6) | |
O2P | 0.8391 (3) | 0.7734 (2) | 0.1482 (1) | 0.0801 (6) | |
C1P | 0.7228 (4) | 0.7995 (2) | 0.0878 (2) | 0.0667 (7) | |
C2P | 0.7710 (5) | 0.8619 (3) | 0.0287 (2) | 0.096 (1) | |
C3P | 0.9587 (9) | 0.8359 (5) | 0.0180 (3) | 0.119 (2) | 0.68 |
C3'P | 0.6746 (18) | 0.9630 (8) | 0.0220 (6) | 0.119 (2) | 0.32 |
H101 | 0.9031 | 0.2819 | 0.2980 | 0.066 | |
H102 | 0.3622 | 0.7085 | 0.1882 | 0.056 | |
HC1 | 0.4427 | 0.2716 | 0.1523 | 0.049 | |
HC3 | 0.9335 | 0.4301 | 0.1955 | 0.051 | |
H1C4 | 0.7466 | 0.5001 | 0.0921 | 0.050 | |
H2C4 | 0.7357 | 0.5865 | 0.1536 | 0.050 | |
HC5 | 0.4377 | 0.5454 | 0.0520 | 0.047 | |
HC7 | 0.2666 | 0.5181 | 0.2354 | 0.053 | |
H1C8 | 0.2520 | 0.3657 | 0.1953 | 0.058 | |
H2C8 | 0.4535 | 0.3580 | 0.2686 | 0.058 | |
H1C9 | 0.2759 | 0.3951 | 0.0636 | 0.054 | |
H2C9 | 0.4795 | 0.3706 | 0.0509 | 0.054 | |
H1C10 | 0.7499 | 0.3061 | 0.0909 | 0.072 | |
H2C10 | 0.9254 | 0.2643 | 0.1660 | 0.072 | |
H3C10 | 0.7188 | 0.2050 | 0.1360 | 0.072 | |
H1C11 | 0.0979 | 0.4958 | 0.0894 | 0.066 | |
H2C11 | 0.0820 | 0.6035 | 0.1301 | 0.066 | |
H3C11 | 0.1354 | 0.6018 | 0.0514 | 0.066 | |
H1C12 | 1.0007 | 0.5242 | 0.2929 | 0.069 | 0.75 |
H2C12 | 0.8794 | 0.4394 | 0.3215 | 0.069 | 0.75 |
H1'C12 | 0.8886 | 0.5679 | 0.2752 | 0.069 | 0.25 |
H2'C12 | 0.9963 | 0.4635 | 0.3147 | 0.069 | 0.25 |
H1C13 | 0.7237 | 0.6289 | 0.2565 | 0.067 | 0.75 |
H2C13 | 0.8185 | 0.6079 | 0.3491 | 0.067 | 0.75 |
H1C13' | 0.8114 | 0.5142 | 0.3831 | 0.067 | 0.25 |
H2C13' | 0.7085 | 0.4141 | 0.3342 | 0.067 | 0.25 |
H1C14 | 0.5727 | 0.4897 | 0.3391 | 0.071 | 0.75 |
H2C14 | 0.4921 | 0.6047 | 0.3166 | 0.071 | 0.75 |
H1'C14 | 0.4920 | 0.5456 | 0.3415 | 0.071 | 0.25 |
H2'C14 | 0.5785 | 0.6150 | 0.2880 | 0.071 | 0.25 |
H101P | 0.4980 | 0.7344 | 0.1038 | 0.074 | |
H1C2P | 0.7770 | 0.9345 | 0.0447 | 0.096 | 0.68 |
H2C2P | 0.6649 | 0.8527 | −0.0221 | 0.096 | 0.68 |
H1'C2P | 0.7236 | 0.8267 | −0.0224 | 0.096 | 0.32 |
H2'C2P | 0.9138 | 0.8713 | 0.0452 | 0.096 | 0.32 |
H1C3P | 0.9777 | 0.8811 | −0.0222 | 0.119 | 0.68 |
H2C3P | 1.0675 | 0.8456 | 0.0679 | 0.119 | 0.68 |
H3C3P | 0.9554 | 0.7638 | 0.0011 | 0.119 | 0.68 |
H1C3P' | 0.7056 | 1.0050 | −0.0172 | 0.119 | 0.32 |
H2C3P' | 0.5318 | 0.9533 | 0.0056 | 0.119 | 0.32 |
H3C3P' | 0.7219 | 0.9979 | 0.0732 | 0.119 | 0.32 |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.052 (1) | 0.071 (1) | 0.071 (1) | −0.0012 (9) | 0.0151 (9) | 0.0241 (9) |
O2 | 0.060 (1) | 0.046 (1) | 0.068 (1) | −0.0018 (8) | 0.0298 (8) | −0.0045 (8) |
C1 | 0.049 (1) | 0.041 (1) | 0.059 (1) | −0.008 (1) | 0.021 (1) | −0.002 (1) |
C2 | 0.050 (1) | 0.045 (1) | 0.057 (1) | −0.001 (1) | 0.022 (1) | 0.003 (1) |
C3 | 0.046 (1) | 0.048 (1) | 0.061 (2) | −0.002 (1) | 0.020 (1) | 0.000 (1) |
C4 | 0.051 (1) | 0.047 (1) | 0.060 (2) | −0.002 (1) | 0.028 (1) | 0.000 (1) |
C5 | 0.051 (1) | 0.049 (1) | 0.044 (1) | −0.003 (1) | 0.019 (1) | 0.001 (1) |
C6 | 0.047 (1) | 0.043 (1) | 0.054 (1) | −0.003 (1) | 0.020 (1) | −0.002 (1) |
C7 | 0.053 (2) | 0.058 (1) | 0.056 (1) | 0.003 (1) | 0.030 (1) | 0.005 (1) |
C8 | 0.054 (2) | 0.057 (2) | 0.070 (2) | −0.002 (1) | 0.031 (1) | 0.007 (1) |
C9 | 0.054 (2) | 0.052 (1) | 0.053 (2) | −0.003 (1) | 0.016 (1) | −0.005 (1) |
C10 | 0.067 (2) | 0.058 (2) | 0.099 (2) | 0.005 (1) | 0.039 (2) | −0.010 (2) |
C11 | 0.047 (2) | 0.070 (2) | 0.074 (2) | 0.002 (1) | 0.014 (1) | 0.004 (1) |
C12 | 0.059 (2) | 0.067 (2) | 0.068 (2) | 0.000 (1) | 0.003 (1) | −0.008 (1) |
C13 | 0.069 (2) | 0.068 (2) | 0.055 (2) | −0.005 (2) | 0.008 (2) | −0.015 (2) |
C13' | 0.069 (2) | 0.068 (2) | 0.055 (2) | −0.005 (2) | 0.008 (2) | −0.015 (2) |
C14 | 0.087 (2) | 0.077 (2) | 0.049 (2) | 0.002 (2) | 0.025 (1) | −0.008 (1) |
O1P | 0.068 (1) | 0.083 (1) | 0.066 (1) | −0.010 (1) | 0.0154 (9) | 0.008 (1) |
O2P | 0.067 (1) | 0.087 (1) | 0.074 (1) | −0.013 (1) | 0.008 (1) | 0.011 (1) |
C1P | 0.073 (2) | 0.058 (2) | 0.067 (2) | −0.012 (2) | 0.022 (2) | −0.002 (1) |
C2P | 0.105 (3) | 0.099 (3) | 0.084 (2) | −0.020 (2) | 0.031 (2) | 0.017 (2) |
C3P | 0.136 (5) | 0.143 (5) | 0.083 (3) | −0.002 (4) | 0.046 (3) | 0.024 (3) |
C3'P | 0.136 (5) | 0.143 (5) | 0.083 (3) | −0.002 (4) | 0.046 (3) | 0.024 (3) |
O1—C2 | 1.448 (3) | C11—H2C11 | 1.000 |
O1—H101 | 1.000 | C11—H3C11 | 1.000 |
O2—C6 | 1.453 (3) | C12—C13 | 1.512 (4) |
O2—H102 | 1.000 | C12—C13' | 1.516 (5) |
C1—C2 | 1.535 (3) | C12—H1C12 | 1.000 |
C1—C8 | 1.527 (3) | C12—H2C12 | 1.000 |
C1—C9 | 1.527 (3) | C12—H1'C12 | 1.000 |
C1—HC1 | 1.000 | C12—H2'C12 | 1.000 |
C2—C3 | 1.555 (3) | C13—C14 | 1.531 (4) |
C2—C10 | 1.528 (3) | C13—H1C13 | 1.000 |
C3—C4 | 1.555 (3) | C13—H2C13 | 1.000 |
C3—C12 | 1.532 (3) | C13'—C14 | 1.525 (5) |
C3—HC3 | 1.000 | C13'—H1C13' | 1.000 |
C4—C5 | 1.532 (3) | C13'—H2C13' | 1.000 |
C4—H1C4 | 1.000 | C14—H1C14 | 1.000 |
C4—H2C4 | 1.000 | C14—H2C14 | 1.000 |
C5—C6 | 1.529 (3) | O1P—C1P | 1.319 (3) |
C5—C9 | 1.524 (3) | O1P—H101P | 1.000 |
C5—HC5 | 1.000 | O2P—C1P | 1.199 (3) |
C6—C7 | 1.556 (3) | C1P—C2P | 1.506 (4) |
C6—C11 | 1.528 (3) | C2P—C3P | 1.507 (6) |
C7—C8 | 1.547 (3) | C2P—C3'P | 1.499 (8) |
C7—C14 | 1.545 (4) | C2P—H1C2P | 1.000 |
C7—HC7 | 1.000 | C2P—H2C2P | 1.000 |
C8—H1C8 | 1.000 | C2P—H1'C2P | 1.000 |
C8—H2C8 | 1.000 | C2P—H2'C2P | 1.000 |
C9—H1C9 | 1.000 | C3P—H1C3P | 1.000 |
C9—H2C9 | 1.000 | C3P—H2C3P | 1.000 |
C10—H1C10 | 1.000 | C3P—H3C3P | 1.000 |
C10—H2C10 | 1.000 | C3'P—H1C3P' | 1.000 |
C10—H3C10 | 1.000 | C3'P—H2C3P' | 1.000 |
C11—H1C11 | 1.000 | C3'P—H3C3P' | 1.000 |
C2—O1—H101 | 115.1 | C6—C11—H1C11 | 109.5 |
C6—O2—H102 | 116.1 | C6—C11—H2C11 | 109.5 |
C2—C1—C8 | 117.3 (2) | C6—C11—H3C11 | 109.5 |
C2—C1—C9 | 110.2 (2) | H1C11—C11—H2C11 | 109.5 |
C2—C1—HC1 | 106.9 | H1C11—C11—H3C11 | 109.5 |
C8—C1—C9 | 108.1 (2) | H2C11—C11—H3C11 | 109.5 |
C8—C1—HC1 | 106.9 | C3—C12—C13 | 119.4 (2) |
C9—C1—HC1 | 106.9 | C3—C12—C13' | 119.4 (4) |
O1—C2—C1 | 105.7 (2) | C3—C12—H1C12 | 106.9 |
O1—C2—C3 | 111.7 (2) | C3—C12—H2C12 | 106.9 |
O1—C2—C10 | 106.9 (2) | C3—C12—H1'C12 | 106.9 |
C1—C2—C3 | 113.8 (2) | C3—C12—H2'C12 | 106.9 |
C1—C2—C10 | 109.8 (2) | C13—C12—H1C12 | 106.9 |
C3—C2—C10 | 108.8 (2) | C13—C12—H2C12 | 106.9 |
C2—C3—C4 | 111.7 (2) | C13'—C12—H1'C12 | 106.9 |
C2—C3—C12 | 117.2 (2) | C13'—C12—H2'C12 | 106.9 |
C2—C3—HC3 | 103.9 | H1C12—C12—H2C12 | 109.5 |
C4—C3—C12 | 114.2 (2) | H1'C12—C12—H2'C12 | 109.5 |
C4—C3—HC3 | 103.9 | C12—C13—C14 | 116.4 (3) |
C12—C3—HC3 | 103.9 | C12—C13—H1C13 | 107.7 |
C3—C4—C5 | 118.3 (2) | C12—C13—H2C13 | 107.7 |
C3—C4—H1C4 | 107.2 | C14—C13—H1C13 | 107.7 |
C3—C4—H2C4 | 107.2 | C14—C13—H2C13 | 107.7 |
C5—C4—H1C4 | 107.2 | H1C13—C13—H2C13 | 109.5 |
C5—C4—H2C4 | 107.2 | C12—C13'—C14 | 116.5 (4) |
H1C4—C4—H2C4 | 109.5 | C12—C13'—H1C13' | 107.7 |
C4—C5—C6 | 118.4 (2) | C12—C13'—H2C13' | 107.7 |
C4—C5—C9 | 108.3 (2) | C14—C13'—H1C13' | 107.7 |
C4—C5—HC5 | 106.5 | C14—C13'—H2C13' | 107.7 |
C6—C5—C9 | 110.0 (2) | H1C13'—C13'—H2C13' | 109.5 |
C6—C5—HC5 | 106.5 | C7—C14—C13 | 121.3 (2) |
C9—C5—HC5 | 106.5 | C7—C14—C13' | 118.6 (4) |
O2—C6—C5 | 106.6 (2) | C7—C14—H1C14 | 106.4 |
O2—C6—C7 | 111.3 (2) | C7—C14—H2C14 | 106.4 |
O2—C6—C11 | 106.0 (2) | C13—C14—H1C14 | 106.4 |
C5—C6—C7 | 113.3 (2) | C13—C14—H2C14 | 106.4 |
C5—C6—C11 | 110.5 (2) | H1C14—C14—H2C14 | 109.5 |
C7—C6—C11 | 109.0 (2) | C1P—O1P—H101P | 116.7 |
C6—C7—C8 | 111.5 (2) | O1P—C1P—O2P | 122.8 (3) |
C6—C7—C14 | 116.5 (2) | O1P—C1P—C2P | 113.2 (3) |
C6—C7—HC7 | 104.2 | O2P—C1P—C2P | 124.0 (3) |
C8—C7—C14 | 114.6 (2) | C1P—C2P—C3P | 115.4 (3) |
C8—C7—HC7 | 104.2 | C1P—C2P—C3'P | 108.8 (5) |
C14—C7—HC7 | 104.2 | C1P—C2P—H1C2P | 108.0 |
C1—C8—C7 | 118.9 (2) | C1P—C2P—H2C2P | 108.0 |
C1—C8—H1C8 | 107.1 | C1P—C2P—H1'C2P | 109.6 |
C1—C8—H2C8 | 107.1 | C1P—C2P—H2'C2P | 109.6 |
C7—C8—H1C8 | 107.1 | H1C2P—C2P—H2C2P | 109.5 |
C7—C8—H2C8 | 107.1 | H1'C2P—C2P—H2'C2P | 109.5 |
H1C8—C8—H2C8 | 109.5 | C2P—C3P—H1C3P | 109.5 |
C1—C9—C5 | 108.2 (2) | C2P—C3P—H2C3P | 109.5 |
C1—C9—H1C9 | 109.8 | C2P—C3P—H3C3P | 109.5 |
C1—C9—H2C9 | 109.8 | H1C3P—C3P—H2C3P | 109.5 |
C5—C9—H1C9 | 109.8 | H1C3P—C3P—H3C3P | 109.5 |
C5—C9—H2C9 | 109.8 | H2C3P—C3P—H3C3P | 109.5 |
H1C9—C9—H2C9 | 109.5 | C2P—C3'P—H1C3P' | 109.5 |
C2—C10—H1C10 | 109.5 | C2P—C3'P—H2C3P' | 109.5 |
C2—C10—H2C10 | 109.5 | C2P—C3'P—H3C3P' | 109.5 |
C2—C10—H3C10 | 109.5 | H1C3P'—C3'P—H2C3P' | 109.5 |
H1C10—C10—H2C10 | 109.5 | H1C3P'—C3'P—H3C3P' | 109.5 |
H1C10—C10—H3C10 | 109.5 | H2C3P'—C3'P—H3C3P' | 109.5 |
H2C10—C10—H3C10 | 109.5 |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H101···O2Pi | 1.00 | 1.82 | 2.822 (3) | 180 |
O2—H102···O1ii | 1.00 | 1.75 | 2.746 (3) | 180 |
O1P—H101P···O2 | 1.00 | 1.64 | 2.635 (3) | 180 |
Symmetry codes: (i) −x+2, y−1/2, −z+1/2; (ii) −x+1, y+1/2, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C14H24O2·C3H6O2 |
Mr | 298.4 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 294 |
a, b, c (Å) | 7.390 (4), 13.218 (5), 18.469 (8) |
β (°) | 110.23 (2) |
V (Å3) | 1693 (1) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.08 |
Crystal size (mm) | 0.10 (radius) |
Data collection | |
Diffractometer | Enraf–Nonius CAD-4 diffractometer |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 3188, 2942, 1786 |
Rint | 0.014 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.056, 0.070, 1.32 |
No. of reflections | 2942 |
No. of parameters | 199 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.39, −0.41 |
Computer programs: CAD-4 Software (Enraf–Nonius, 1989), CAD-4 Softwar (Enraf–Nonius, 1989), SIR92 (Altomare et al., 1994), RAELS (Rae, 2000), ORTEP-3 (Farrugia, 1997) and CrystalMaker (Palmer, 2005), local programs.
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H101···O2Pi | 1.00 | 1.82 | 2.822 (3) | 180 |
O2—H102···O1ii | 1.00 | 1.75 | 2.746 (3) | 180 |
O1P—H101P···O2 | 1.00 | 1.64 | 2.635 (3) | 180 |
Symmetry codes: (i) −x+2, y−1/2, −z+1/2; (ii) −x+1, y+1/2, −z+1/2. |
Footnotes
‡On leave from the Department of Material and Life Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
Acknowledgements
This research was supported by the Australian Research Council.
References
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The diol component, A, of the title compound, A—B, is a member of the helical tubuland host family, a major characteristic of which is formation of lattice inclusion compounds in the chiral space group P3121 (or its enantiomorph P3221) (Bishop, 2009). A forms this structure when crystallized from non-protic solvents (Dance et al., 1986). Some, but by no means all, of this family of diols can also form hydrogen-bonded co-crystals when crystallized from protic solvents. Two members of this diol family have been found previously to form such 1:1 compounds with carboxylic acids (Alshahateet et al., 2004; Yue et al., 2006). These co-crystals utilize infinite chains of an alcohol–carboxylic acid–alcohol supramolecular sython, (···O—H···O═ C(R)—O—H···O—H···), in which the carboxylic acid group behaves as if it were an extended alcohol hydroxy group. The diol, A, in the title compound is now found to be the third helical tubuland diol to behave in this manner (Fig. 1). Its 1:1 co-crystals with propanoic acid, A—B, contain chains of hydrogen-bonded molecules (A—B—A-)n surrounding pseudo-threefold screw axes resulting in formation of chiral layers as each diol, A, hydrogen bonds within two such threefold screw arrangements (Figs. 2 and 3). Adjacent layers contain diol molecules with the opposite handedness. The resultant lattice is essentially isostructural with the previous examples in P21/c found to use this novel supramolecular synthon.