- 1. Chemical context
- 2. Structural commentary
- 3. Supramolecular features
- 4. Database survey
- 5. Hirshfeld surface analysis, interaction energies
- 6. Synthesis and crystallization
- 7. Gelation studies
- 8. Refinement
- 9. Hirshfeld surface, fingerprint plots, interaction energy calculations
- Supporting information
- References
- 1. Chemical context
- 2. Structural commentary
- 3. Supramolecular features
- 4. Database survey
- 5. Hirshfeld surface analysis, interaction energies
- 6. Synthesis and crystallization
- 7. Gelation studies
- 8. Refinement
- 9. Hirshfeld surface, fingerprint plots, interaction energy calculations
- Supporting information
- References
weak interactions in crystals
An exploration of O—H⋯O and C—H⋯π interactions in a long-chain-ester-substituted phenylphenol: methyl 10-[4-(4-hydroxyphenyl)phenoxy]decanoate
aDepartment of Chemistry, SUNY-College at Geneseo, Geneseo, NY 14454, USA
*Correspondence e-mail: geiger@geneseo.edu
An understanding of the driving forces resulting in crystallization vs organogel formation is essential to the development of modern soft materials. In the molecular structure of the title compound, methyl 10-[4-(4-hydroxyphenyl)phenoxy]decanoate (MBO10Me), C23H30O4, the aromatic rings of the biphenyl group are canted by 6.6 (2)° and the long-chain ester group has an extended conformation. In the crystal, molecules are linked by O—H⋯O hydrogen bonds, forming chains along [10]. The chains are linked by C—H⋯O hydrogen bonds, forming layers parallel to the ac plane. The layers are linked by C—H⋯π interactions, forming a three-dimensional supramolecular structure. The extended structure exhibits a lamellar sheet arrangement of molecules stacking along the b-axis direction. Each molecule has six nearest neighbors and the seven-molecule bundles stack to form a columnar Interaction energies within the bundles are dominated by dispersion forces, whereas intercolumnar interactions have a greater electrostatic component.
Keywords: crystal structure; Hirshfeld surface; energy framework; interaction energy; hydrogen bonds; C—H⋯π interactions.
CCDC reference: 1586244
1. Chemical context
In a gel, the scaffold molecules (the gelator) assemble into a network of fibers, which trap large numbers of solvent molecules by way of non-covalent interactions (Weiss, 2014). Organogels, which are obtained by dissolving a small amount of a low-molecular-mass organic gelator in an organic solvent, have myriad uses, including drug delivery and biomedical diagnostics (Wu & Wang, 2016; Tibbitt et al., 2016), medical implants (Liow et al., 2016; Yasmeen et al., 2014), and tissue engineering (Xavier et al., 2015; Yan et al., 2015).
For a gel, self-assembly of a three-dimensional arrangement of molecules incorporating a large number of solvent molecules results in a thermodynamically stable state, whereas self-assembly followed by crystallization gives a solid. The factors resulting in gelation rather than crystallization are subtle and, as a result, there are few examples of single-crystal structure determinations of organogelators (Adhikari et al., 2016; Rojek et al., 2015; Cui et al., 2010; Martin et al., 2016; Geiger, Zick et al., 2017; Geiger, Geiger et al., 2017).
Traditional hydrogen bonding, π–π and C—H⋯π interactions play important roles in determining the stability of organogels and crystalline lattices. The combination of solid-state structural data obtained via X-ray and interaction energies determined using computational techniques affords a powerful means of exploring the subtle differences in the driving force for crystallization vs gelation.
andRecently, we reported the crystal structures and gelation properties of two bis(long-chain-ester)-substituted biphenyl compounds (Geiger, Geiger et al., 2017). To further understand the factors favoring gelation over crystallization, we have extended our exploration to a mono-substituted analog. In this report, we explore the structure, gelation ability, and intermolecular interactions exhibited by methyl 10-[4-(4-hydroxyphenyl)phenoxy]decanoate (MBO10Me). Using CrystalExplorer17 (Turner et al., 2017), we have estimated the strengths of the primary intermolecular interactions found in the supramolecular structure. As expected, the presence of the phenol results in an extended O—H⋯O and C–H⋯O hydrogen-bonding network. In addition, and C—H⋯π interactions are observed.
2. Structural commentary
MBO10Me was isolated as a side product during the synthesis of the corresponding bis(ester-substituted)biphenyl, 4,4′-bis(9-methyloxycarbonylnonyloxy)biphenyl, BBO10Me (see Scheme below).
Although BBO10Me readily forms stable gels in a variety of solvents, MBO10Me does not behave as an organogelator in any of the solvents examined. The solid-state structures of BBO6Me and BBO6Et have been reported (Geiger, Geiger et al., 2017). BBO6Me behaves as an organogelator, but BBO6Et does not. The two compounds are isostructural and a comparative energy framework analysis (Turner et al., 2015) showed that the ethyl ester exhibits weaker intercolumnar interactions. The structural characterization of MBO10Me was undertaken in an effort to better understand the subtle differences in the strengths of the intermolecular interactions that control gelation.
Fig. 1 shows the molecular structure of MBO10Me with the atom-labeling scheme. The dihedral angle between the two phenyl rings is 6.6 (2) ° and the C6—C1—C7—C12 torsion angle is −6.3 (4)°. The ester chain adopts a straight-chain conformation, as is found in similar structures (Geiger, Zick et al., 2017; Geiger, Geiger et al., 2017), which maximizes the intermolecular van der Waals interactions. The ester chain is, however, tilted out of the plane of the phenyl ring to which it is attached, with a C13—O2—C4—C3 torsion angle of 173.2 (3)°.
3. Supramolecular features
As seen in Table 1 and Fig. 2, O—H⋯O hydrogen bonds, in which the phenol group is the donor and the ester carbonyl group is the acceptor, and C—H⋯O hydrogen bonds, in which the methyl group is the donor and the phenol is the acceptor, result in sheets parallel to the ac plane that are composed of interlinked R44(52) rings. The structure is extended into the third dimension via C—H⋯π interactions involving phenyl ring hydrogen atoms and the π systems of both phenyl rings (see Fig. 3 and Table 1). The result is a columnar structure similar to that observed in BBO6Me and BBO6Et (Geiger, Geiger et al., 2017) with an important difference: the columns are joined by an O—H⋯O hydrogen-bonding network in which the phenol is the donor and the ester carbonyl is the acceptor (Table 1 and Fig. 2).
4. Database survey
A search of the Cambridge Structural Database (CSD, V5.38, last update May 2017; Groom et al., 2016) for 4,4′-biphenols yielded 21 structures, excluding those in which the biphenol was coordinated to a metal. There are 15 examples of structures with biphenol molecules in which the dihedral angle between phenyl rings is 2° or less. [The calculated in the gas phase for 4,4′-biphenyl is ca 8 kJ mol−1 (Johansson & Olsen, 2008).] In the title compound, MBO10Me, the dihedral angle between the two phenyl rings is 6.6 (2)°.
5. Hirshfeld surface analysis, interaction energies
Using CrystalExplorer17 (Turner et al., 2017), the Hirshfeld surface and fingerprint plots were calculated (see Section 9 for details). As seen in Fig. 4, the closest intermolecular contacts involve the phenol group. Each of the types of hydrogen-bonding interactions are clearly discernible in the fingerprint plot. The presence of C—H⋯π bonding is also apparent. The H⋯O and H⋯C surface-contact coverages are 17.6% and 22.9%, respectively. No significant π–π interactions are are observed [the closest ring centroid-to-ring centroid distance is 4.921 (2) Å].
Table 2 shows the results of the interaction energy calculations (see Section 9 for details). The results are represented graphically in Fig. 5 as framework energy diagrams (Turner et al., 2015). In an energy framework, the cylinder size correlates to the strength of the interaction. The framework is reminiscent of that observed in the bis(substituted) compounds with interactions that are primarily dispersive in nature between the six nearest intracolumnar neighbors. However, the intercolumnar interactions, which possess the O—H⋯O hydrogen bonding, have greater electrostatic components. These findings show that the van der Waals and C—H⋯π interactions result in significantly favorable intermolecular attractive forces, surpassing the strength of the intercolumnar O—H⋯O interaction.
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Based on the three structures reported to date, a columnar supramolecular structure appears to be a common feature of long-chain ester compounds with a biphenyl core. The findings reported herein support the rationale posited for the difference in gelation ability exhibited by BBO6Me and BBO6Et (Geiger, Geiger et al., 2017), i.e., the strength of the intercolumnar interactions. The O—H⋯O hydrogen bonds between columns in MBO10Me are about twice the strength of the intercolumnar interactions found in BBO6Me (−15.5 kJ mol−1) and three times that found in BBO6Et (−10.1 kJ mol−1). A possible explanation for the lack of gelation ability of MBO10Me is that the stronger intercolumnar interactions favor formation of the rather than incorporation of a large number of solvent molecules giving a gel.
6. Synthesis and crystallization
6.1. Methyl 10-[4-(4-hydroxyphenyl)phenoxy]decanoate (MBO10Me)
The title compound was isolated as a minor side-product during the synthesis of the organogelator 4,4′-bis-(9-methyloxycarbonylnonyloxy)biphenyl (BBO10Me). 1H NMR (400 MHz, DMSO-d6) δ 9.40 (s, 1H), 7.44 (d, 2H), 7.38 (d, 2H), 6.92 (d, 2H), 6.68 (d, 2H), 4.02 (t, 2H), 3.60 (s, 3H), 2.20 (t, 2H), 1.73 (m, 2H), 1.35–1.45 (m, 12H). Single crystals suitable for X-ray analysis were isolated from the NMR tube in DMSO-d6.
7. Gelation studies
The gelation behavior of MBO10Me was examined in n-octanol, n-hexanol, n-butanol and ethanol. Gelation attempts were carried out using a 2.0% (wt/wt) of the compound and solvent in a screw-capped vial. The mixture was heated until all the solid dissolved and was then allowed to cool to room temperature. Formation of a gel is indicated when inversion of the vial yields no movement of the solvent.
8. Refinement
Crystal data, data collection and structure . All H atoms were located in difference-Fourier maps. H atoms were refined using a riding model, with C—H = 0.95 Å and Uiso(H) = 1.2Ueq(C) for the aromatic positions, C—H = 0.99 Å and Uiso(H) = 1.2Ueq(C) for the methylene groups, and C—H = 0.98 Å and Uiso(H) = 1.5Ueq(C) for the methyl group. The phenolic H atom was refined freely, including the isotropic displacement parameter. A meaningless and corresponding standard deviation were observed.
details are summarized in Table 3
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9. Hirshfeld surface, fingerprint plots, interaction energy calculations
Hirshfeld surfaces, fingerprint plots, interaction energies and energy frameworks (Turner et al., 2015) were calculated using CrystalExplorer17 (Turner et al., 2017). Interaction energies were calculated employing the CE-B3LYP/6-31G(d,p) functional/basis set combination and are corrected for basis set superposition energy using the counterpoise method. The interaction energy is broken down as
Etot = keleE′ele + kpolE′pol + kdisE′dis + krepE′repwhere the k values are scale factors, E′ele represents the electrostatic component, E′pol the polarization energy, E′dis the dispersion energy, and E′rep the exchange-repulsion energy (Turner et al., 2014; Mackenzie et al., 2017). The C—H bond lengths were converted to normalized values based on neutron diffraction results (Allen et al., 2004).
Supporting information
CCDC reference: 1586244
https://doi.org/10.1107/S2056989017016589/su5401sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S2056989017016589/su5401Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S2056989017016589/su5401Isup3.mol
Supporting information file. DOI: https://doi.org/10.1107/S2056989017016589/su5401Isup4.cml
Data collection: APEX2 (Bruker, 2013); cell
SAINT (Bruker, 2013); data reduction: SAINT (Bruker, 2013); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL2014/7 (Sheldrick, 2015); molecular graphics: PLATON (Spek, 2009) and Mercury (Macrae et al., 2008); software used to prepare material for publication: publCIF (Westrip, 2010).C23H30O4 | F(000) = 800 |
Mr = 370.47 | Dx = 1.192 Mg m−3 |
Monoclinic, Cc | Mo Kα radiation, λ = 0.71073 Å |
a = 42.287 (9) Å | Cell parameters from 122 reflections |
b = 7.2848 (15) Å | θ = 3.1–19.4° |
c = 6.7006 (13) Å | µ = 0.08 mm−1 |
β = 91.226 (12)° | T = 200 K |
V = 2063.7 (7) Å3 | Plate, clear colorless |
Z = 4 | 0.40 × 0.40 × 0.20 mm |
Bruker SMART X2S benchtop diffractometer | 3095 independent reflections |
Radiation source: sealed microfocus tube | 2363 reflections with I > 2σ(I) |
Doubly curved silicon crystal monochromator | Rint = 0.060 |
Detector resolution: 8.3330 pixels mm-1 | θmax = 25.3°, θmin = 2.8° |
ω scans | h = −44→50 |
Absorption correction: multi-scan (SADABS; Bruker, 2013) | k = −8→8 |
Tmin = 0.64, Tmax = 0.98 | l = −8→8 |
10387 measured reflections |
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)] = 0.044 | Hydrogen site location: mixed |
wR(F2) = 0.122 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.05 | w = 1/[σ2(Fo2) + (0.063P)2 + 0.2432P] where P = (Fo2 + 2Fc2)/3 |
3095 reflections | (Δ/σ)max < 0.001 |
249 parameters | Δρmax = 0.12 e Å−3 |
2 restraints | Δρmin = −0.18 e Å−3 |
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. |
x | y | z | Uiso*/Ueq | ||
O1 | 0.73167 (7) | 0.2440 (4) | −0.5378 (5) | 0.0736 (9) | |
H1 | 0.7463 (10) | 0.294 (5) | −0.458 (7) | 0.077 (14)* | |
O2 | 0.51725 (5) | 0.2275 (3) | 0.0196 (3) | 0.0512 (7) | |
O3 | 0.28496 (7) | 0.1690 (4) | 1.2022 (5) | 0.0826 (9) | |
O4 | 0.29945 (7) | 0.3224 (4) | 1.4752 (4) | 0.0800 (9) | |
C1 | 0.60847 (8) | 0.2531 (4) | −0.2156 (5) | 0.0383 (8) | |
C2 | 0.58278 (8) | 0.1710 (5) | −0.3145 (5) | 0.0442 (8) | |
H2 | 0.5858 | 0.1167 | −0.4415 | 0.053* | |
C3 | 0.55318 (8) | 0.1662 (5) | −0.2339 (5) | 0.0447 (8) | |
H3 | 0.5364 | 0.108 | −0.3058 | 0.054* | |
C4 | 0.54735 (8) | 0.2444 (5) | −0.0505 (5) | 0.0401 (9) | |
C5 | 0.57240 (9) | 0.3313 (5) | 0.0505 (5) | 0.0508 (9) | |
H5 | 0.569 | 0.3892 | 0.1753 | 0.061* | |
C6 | 0.60217 (8) | 0.3326 (4) | −0.0319 (6) | 0.0499 (9) | |
H6 | 0.619 | 0.3903 | 0.0402 | 0.06* | |
C7 | 0.64072 (7) | 0.2542 (4) | −0.3000 (5) | 0.0392 (8) | |
C8 | 0.64804 (9) | 0.1590 (5) | −0.4734 (6) | 0.0600 (10) | |
H8 | 0.6317 | 0.0942 | −0.5427 | 0.072* | |
C9 | 0.67810 (9) | 0.1556 (5) | −0.5479 (6) | 0.0662 (11) | |
H9 | 0.6822 | 0.0868 | −0.665 | 0.079* | |
C10 | 0.70209 (8) | 0.2498 (4) | −0.4554 (6) | 0.0522 (10) | |
C11 | 0.69596 (9) | 0.3481 (5) | −0.2861 (6) | 0.0600 (10) | |
H11 | 0.7124 | 0.4153 | −0.2207 | 0.072* | |
C12 | 0.66573 (8) | 0.3490 (5) | −0.2107 (5) | 0.0552 (10) | |
H12 | 0.6619 | 0.4174 | −0.0929 | 0.066* | |
C13 | 0.51112 (8) | 0.2887 (5) | 0.2186 (5) | 0.0469 (9) | |
H13A | 0.5118 | 0.4244 | 0.2255 | 0.056* | |
H13B | 0.5272 | 0.2385 | 0.3135 | 0.056* | |
C14 | 0.47868 (8) | 0.2203 (5) | 0.2700 (6) | 0.0483 (9) | |
H14A | 0.4788 | 0.0844 | 0.2685 | 0.058* | |
H14B | 0.4633 | 0.2624 | 0.1663 | 0.058* | |
C15 | 0.46794 (8) | 0.2860 (4) | 0.4725 (5) | 0.0437 (8) | |
H15A | 0.4682 | 0.4219 | 0.4748 | 0.052* | |
H15B | 0.4831 | 0.2421 | 0.5766 | 0.052* | |
C16 | 0.43495 (8) | 0.2191 (4) | 0.5219 (5) | 0.0426 (8) | |
H16A | 0.4199 | 0.2639 | 0.4178 | 0.051* | |
H16B | 0.4348 | 0.0832 | 0.5171 | 0.051* | |
C17 | 0.42356 (8) | 0.2799 (4) | 0.7235 (5) | 0.0429 (8) | |
H17A | 0.424 | 0.4157 | 0.7289 | 0.052* | |
H17B | 0.4385 | 0.2338 | 0.8276 | 0.052* | |
C18 | 0.39041 (9) | 0.2150 (4) | 0.7728 (5) | 0.0448 (8) | |
H18A | 0.3754 | 0.261 | 0.6691 | 0.054* | |
H18B | 0.3899 | 0.0792 | 0.7683 | 0.054* | |
C19 | 0.37950 (8) | 0.2779 (4) | 0.9753 (5) | 0.0442 (8) | |
H19A | 0.3811 | 0.4134 | 0.9811 | 0.053* | |
H19B | 0.3942 | 0.2279 | 1.0785 | 0.053* | |
C20 | 0.34601 (8) | 0.2228 (5) | 1.0281 (5) | 0.0469 (9) | |
H20A | 0.331 | 0.2703 | 0.9249 | 0.056* | |
H20B | 0.3444 | 0.0873 | 1.0291 | 0.056* | |
C21 | 0.33705 (9) | 0.2965 (5) | 1.2292 (6) | 0.0546 (10) | |
H21A | 0.3522 | 0.2475 | 1.3304 | 0.066* | |
H21B | 0.3396 | 0.4316 | 1.2272 | 0.066* | |
C22 | 0.30427 (9) | 0.2536 (5) | 1.2951 (6) | 0.0529 (9) | |
C23 | 0.26842 (13) | 0.2933 (7) | 1.5605 (9) | 0.0984 (18) | |
H23A | 0.2635 | 0.1618 | 1.5605 | 0.148* | |
H23B | 0.2524 | 0.3589 | 1.4805 | 0.148* | |
H23C | 0.2685 | 0.3397 | 1.6978 | 0.148* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0492 (17) | 0.092 (2) | 0.080 (2) | −0.0003 (13) | 0.0247 (15) | −0.0105 (16) |
O2 | 0.0425 (14) | 0.0684 (17) | 0.0429 (15) | −0.0038 (12) | 0.0052 (12) | −0.0054 (12) |
O3 | 0.0494 (15) | 0.109 (2) | 0.090 (2) | −0.0115 (16) | 0.0097 (14) | −0.0197 (19) |
O4 | 0.076 (2) | 0.100 (2) | 0.0656 (19) | −0.0162 (16) | 0.0320 (16) | −0.0190 (17) |
C1 | 0.046 (2) | 0.0295 (16) | 0.040 (2) | 0.0002 (12) | 0.0028 (15) | 0.0012 (13) |
C2 | 0.048 (2) | 0.0502 (19) | 0.0340 (19) | −0.0005 (15) | 0.0007 (15) | −0.0056 (15) |
C3 | 0.0430 (18) | 0.049 (2) | 0.042 (2) | −0.0037 (14) | −0.0013 (15) | −0.0019 (15) |
C4 | 0.0399 (19) | 0.0411 (19) | 0.040 (2) | 0.0010 (14) | 0.0033 (16) | 0.0048 (15) |
C5 | 0.054 (2) | 0.052 (2) | 0.047 (2) | −0.0067 (16) | 0.0087 (17) | −0.0128 (17) |
C6 | 0.045 (2) | 0.0500 (18) | 0.055 (2) | −0.0121 (14) | 0.0052 (15) | −0.0159 (16) |
C7 | 0.045 (2) | 0.0299 (16) | 0.043 (2) | 0.0006 (12) | 0.0043 (16) | −0.0003 (13) |
C8 | 0.055 (2) | 0.066 (2) | 0.060 (2) | −0.0132 (16) | 0.0147 (18) | −0.0250 (19) |
C9 | 0.061 (2) | 0.071 (2) | 0.066 (3) | −0.0080 (19) | 0.021 (2) | −0.0298 (19) |
C10 | 0.048 (2) | 0.049 (2) | 0.060 (3) | 0.0047 (15) | 0.0116 (18) | 0.0014 (17) |
C11 | 0.047 (2) | 0.069 (2) | 0.064 (3) | −0.0045 (16) | 0.0020 (19) | −0.012 (2) |
C12 | 0.048 (2) | 0.067 (2) | 0.051 (2) | −0.0021 (16) | 0.0061 (18) | −0.0191 (17) |
C13 | 0.047 (2) | 0.053 (2) | 0.040 (2) | −0.0002 (15) | 0.0056 (16) | −0.0014 (16) |
C14 | 0.048 (2) | 0.051 (2) | 0.046 (2) | −0.0051 (15) | 0.0042 (16) | −0.0068 (17) |
C15 | 0.0403 (18) | 0.051 (2) | 0.040 (2) | 0.0011 (15) | 0.0004 (15) | −0.0007 (16) |
C16 | 0.0392 (18) | 0.0465 (19) | 0.042 (2) | −0.0024 (14) | 0.0000 (15) | −0.0047 (16) |
C17 | 0.0442 (19) | 0.0486 (19) | 0.0359 (19) | 0.0004 (15) | −0.0003 (15) | 0.0005 (16) |
C18 | 0.0471 (19) | 0.047 (2) | 0.040 (2) | 0.0001 (15) | −0.0005 (14) | −0.0055 (17) |
C19 | 0.044 (2) | 0.0509 (19) | 0.0374 (19) | −0.0005 (15) | −0.0007 (16) | 0.0000 (16) |
C20 | 0.045 (2) | 0.052 (2) | 0.043 (2) | −0.0011 (15) | 0.0009 (16) | −0.0029 (17) |
C21 | 0.050 (2) | 0.070 (3) | 0.043 (2) | −0.0068 (17) | 0.0075 (17) | −0.0075 (18) |
C22 | 0.049 (2) | 0.055 (2) | 0.056 (3) | 0.0026 (17) | 0.0095 (18) | 0.002 (2) |
C23 | 0.090 (4) | 0.100 (4) | 0.108 (5) | −0.009 (3) | 0.061 (3) | −0.008 (3) |
O1—C10 | 1.378 (4) | C13—H13A | 0.99 |
O1—H1 | 0.89 (4) | C13—H13B | 0.99 |
O2—C4 | 1.372 (4) | C14—C15 | 1.518 (5) |
O2—C13 | 1.435 (4) | C14—H14A | 0.99 |
O3—C22 | 1.188 (5) | C14—H14B | 0.99 |
O4—C22 | 1.327 (5) | C15—C16 | 1.521 (4) |
O4—C23 | 1.458 (5) | C15—H15A | 0.99 |
C1—C6 | 1.391 (5) | C15—H15B | 0.99 |
C1—C2 | 1.395 (4) | C16—C17 | 1.511 (4) |
C1—C7 | 1.487 (3) | C16—H16A | 0.99 |
C2—C3 | 1.374 (4) | C16—H16B | 0.99 |
C2—H2 | 0.95 | C17—C18 | 1.522 (4) |
C3—C4 | 1.381 (5) | C17—H17A | 0.99 |
C3—H3 | 0.95 | C17—H17B | 0.99 |
C4—C5 | 1.396 (5) | C18—C19 | 1.514 (5) |
C5—C6 | 1.385 (5) | C18—H18A | 0.99 |
C5—H5 | 0.95 | C18—H18B | 0.99 |
C6—H6 | 0.95 | C19—C20 | 1.521 (4) |
C7—C12 | 1.388 (4) | C19—H19A | 0.99 |
C7—C8 | 1.394 (5) | C19—H19B | 0.99 |
C8—C9 | 1.376 (5) | C20—C21 | 1.506 (5) |
C8—H8 | 0.95 | C20—H20A | 0.99 |
C9—C10 | 1.363 (5) | C20—H20B | 0.99 |
C9—H9 | 0.95 | C21—C22 | 1.497 (5) |
C10—C11 | 1.371 (5) | C21—H21A | 0.99 |
C11—C12 | 1.385 (5) | C21—H21B | 0.99 |
C11—H11 | 0.95 | C23—H23A | 0.98 |
C12—H12 | 0.95 | C23—H23B | 0.98 |
C13—C14 | 1.506 (4) | C23—H23C | 0.98 |
C10—O1—H1 | 112 (3) | C14—C15—C16 | 112.8 (3) |
C4—O2—C13 | 118.5 (2) | C14—C15—H15A | 109.0 |
C22—O4—C23 | 117.3 (3) | C16—C15—H15A | 109.0 |
C6—C1—C2 | 115.9 (3) | C14—C15—H15B | 109.0 |
C6—C1—C7 | 121.9 (3) | C16—C15—H15B | 109.0 |
C2—C1—C7 | 122.2 (3) | H15A—C15—H15B | 107.8 |
C3—C2—C1 | 122.1 (3) | C17—C16—C15 | 114.3 (2) |
C3—C2—H2 | 119.0 | C17—C16—H16A | 108.7 |
C1—C2—H2 | 119.0 | C15—C16—H16A | 108.7 |
C2—C3—C4 | 121.4 (3) | C17—C16—H16B | 108.7 |
C2—C3—H3 | 119.3 | C15—C16—H16B | 108.7 |
C4—C3—H3 | 119.3 | H16A—C16—H16B | 107.6 |
O2—C4—C3 | 116.9 (3) | C16—C17—C18 | 114.6 (2) |
O2—C4—C5 | 125.1 (3) | C16—C17—H17A | 108.6 |
C3—C4—C5 | 118.0 (3) | C18—C17—H17A | 108.6 |
C6—C5—C4 | 119.7 (3) | C16—C17—H17B | 108.6 |
C6—C5—H5 | 120.1 | C18—C17—H17B | 108.6 |
C4—C5—H5 | 120.1 | H17A—C17—H17B | 107.6 |
C5—C6—C1 | 122.9 (3) | C19—C18—C17 | 113.6 (3) |
C5—C6—H6 | 118.6 | C19—C18—H18A | 108.9 |
C1—C6—H6 | 118.6 | C17—C18—H18A | 108.9 |
C12—C7—C8 | 115.2 (3) | C19—C18—H18B | 108.9 |
C12—C7—C1 | 122.3 (3) | C17—C18—H18B | 108.9 |
C8—C7—C1 | 122.4 (3) | H18A—C18—H18B | 107.7 |
C9—C8—C7 | 122.3 (3) | C18—C19—C20 | 115.6 (3) |
C9—C8—H8 | 118.8 | C18—C19—H19A | 108.4 |
C7—C8—H8 | 118.8 | C20—C19—H19A | 108.4 |
C10—C9—C8 | 120.7 (3) | C18—C19—H19B | 108.4 |
C10—C9—H9 | 119.6 | C20—C19—H19B | 108.4 |
C8—C9—H9 | 119.6 | H19A—C19—H19B | 107.4 |
C9—C10—C11 | 119.1 (3) | C21—C20—C19 | 111.5 (3) |
C9—C10—O1 | 118.4 (3) | C21—C20—H20A | 109.3 |
C11—C10—O1 | 122.5 (3) | C19—C20—H20A | 109.3 |
C10—C11—C12 | 119.8 (3) | C21—C20—H20B | 109.3 |
C10—C11—H11 | 120.1 | C19—C20—H20B | 109.3 |
C12—C11—H11 | 120.1 | H20A—C20—H20B | 108.0 |
C11—C12—C7 | 122.8 (3) | C22—C21—C20 | 116.2 (3) |
C11—C12—H12 | 118.6 | C22—C21—H21A | 108.2 |
C7—C12—H12 | 118.6 | C20—C21—H21A | 108.2 |
O2—C13—C14 | 107.0 (3) | C22—C21—H21B | 108.2 |
O2—C13—H13A | 110.3 | C20—C21—H21B | 108.2 |
C14—C13—H13A | 110.3 | H21A—C21—H21B | 107.4 |
O2—C13—H13B | 110.3 | O3—C22—O4 | 123.7 (4) |
C14—C13—H13B | 110.3 | O3—C22—C21 | 125.7 (4) |
H13A—C13—H13B | 108.6 | O4—C22—C21 | 110.5 (3) |
C13—C14—C15 | 113.0 (3) | O4—C23—H23A | 109.5 |
C13—C14—H14A | 109.0 | O4—C23—H23B | 109.5 |
C15—C14—H14A | 109.0 | H23A—C23—H23B | 109.5 |
C13—C14—H14B | 109.0 | O4—C23—H23C | 109.5 |
C15—C14—H14B | 109.0 | H23A—C23—H23C | 109.5 |
H14A—C14—H14B | 107.8 | H23B—C23—H23C | 109.5 |
C6—C1—C2—C3 | −1.0 (4) | C8—C9—C10—O1 | −179.0 (3) |
C7—C1—C2—C3 | 178.3 (3) | C9—C10—C11—C12 | 0.6 (5) |
C1—C2—C3—C4 | 0.5 (5) | O1—C10—C11—C12 | 179.8 (3) |
C13—O2—C4—C3 | 173.2 (3) | C10—C11—C12—C7 | −0.3 (6) |
C13—O2—C4—C5 | −5.6 (5) | C8—C7—C12—C11 | −0.8 (5) |
C2—C3—C4—O2 | −178.1 (3) | C1—C7—C12—C11 | 178.8 (3) |
C2—C3—C4—C5 | 0.8 (5) | C4—O2—C13—C14 | −169.0 (3) |
O2—C4—C5—C6 | 177.1 (3) | O2—C13—C14—C15 | −176.1 (3) |
C3—C4—C5—C6 | −1.7 (5) | C13—C14—C15—C16 | 179.1 (3) |
C4—C5—C6—C1 | 1.2 (5) | C14—C15—C16—C17 | 179.3 (3) |
C2—C1—C6—C5 | 0.2 (5) | C15—C16—C17—C18 | 179.4 (3) |
C7—C1—C6—C5 | −179.2 (3) | C16—C17—C18—C19 | −179.9 (3) |
C6—C1—C7—C12 | −6.3 (4) | C17—C18—C19—C20 | 177.7 (2) |
C2—C1—C7—C12 | 174.4 (3) | C18—C19—C20—C21 | −178.3 (3) |
C6—C1—C7—C8 | 173.2 (3) | C19—C20—C21—C22 | 178.9 (3) |
C2—C1—C7—C8 | −6.1 (4) | C23—O4—C22—O3 | −0.9 (6) |
C12—C7—C8—C9 | 1.6 (5) | C23—O4—C22—C21 | 179.6 (4) |
C1—C7—C8—C9 | −178.0 (3) | C20—C21—C22—O3 | −0.8 (6) |
C7—C8—C9—C10 | −1.4 (6) | C20—C21—C22—O4 | 178.8 (3) |
C8—C9—C10—C11 | 0.2 (6) |
Cg1 and Cg2 are the centroids of rings C1–C6 and C7–C12, respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···O3i | 0.89 (4) | 1.96 (4) | 2.813 (5) | 162 (4) |
C23—H23C···O1ii | 0.98 | 2.46 | 3.149 (5) | 127 |
C23—H23A···O3iii | 0.98 | 2.74 | 3.564 (6) | 142 |
C3—H3···O2iv | 0.95 | 2.82 | 3.627 (4) | 143 |
C2—H2···Cg1iv | 0.95 | 2.98 | 3.737 (4) | 138 |
C9—H9···Cg1iv | 0.95 | 2.89 | 3.716 (4) | 146 |
C5—H5···Cg2v | 0.95 | 2.95 | 3.722 (4) | 139 |
C12—H12···Cg2v | 0.95 | 2.83 | 3.661 (4) | 147 |
Symmetry codes: (i) x+1/2, −y+1/2, z−3/2; (ii) x−1/2, −y+1/2, z+5/2; (iii) x, −y, z+1/2; (iv) x, −y, z−1/2; (v) x, −y+1, z+1/2. |
N refers to the number of molecules with an R molecular centroid-to-centroid distance (Å). Energies are in kJ mol-1. |
N | primary interaction | R | E'ele | E'pol | E'dis | E'rep | Etot |
2 | C—H···π | 4.91 | -13.6 | -2.8 | -83.5 | 43.2 | -62.5 |
2 | C—H···π | 4.98 | -13.5 | -3.5 | -76.1 | 38.7 | -59.2 |
2 | H···H | 6.70 | -8.2 | -1.2 | -38.2 | 18.1 | -31.7 |
2 | O1—H···O3 | 23.60 | -34.2 | -7.1 | -10.6 | 33.0 | -30.3 |
2 | C—H···O1 | 27.25 | -6.1 | -1.3 | -5.5 | 8.8 | -6.8 |
2 | C—H···O1 | 25.53 | -1.9 | -0.4 | -4.4 | 1.6 | -5.1 |
Scale factors used to determine Etot: kele = 1.057, kpol = 0.740, kdisp = 0.871, krep = 0.618 (Mackenzie et al., 2017). See Section 9 for calculation details. |
Acknowledgements
This work was supported by a Congressionally directed grant from the US Department of Education for the X-ray diffractometer and a grant from the Geneseo Foundation.
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