Abstract
The title molecule, C19H19FO2, exits in the enol form with a dihedral angle of 33.06 (8)° between the two benzene rings. The molecular conformation is stabilized in part by an intramolecular O—H⋯O hydrogen bond.
Related literature
For background information on 1,3-diketones, see: Baskar & Roesky (2005 ▶); Bassett et al. (2004 ▶); Bertolasi et al. (1991 ▶); Jang et al. (2006 ▶); Soldatov et al. (2003 ▶); Vila et al. (1991 ▶).
Experimental
Crystal data
C19H19FO2
M r = 298.34
Monoclinic,
a = 9.8349 (12) Å
b = 10.0163 (13) Å
c = 16.232 (2) Å
β = 97.788 (2)°
V = 1584.3 (3) Å3
Z = 4
Mo Kα radiation
μ = 0.09 mm−1
T = 298 (2) K
0.20 × 0.10 × 0.10 mm
Data collection
Bruker SMART CCD diffractometer
Absorption correction: multi-scan (SADABS; Sheldrick, 1996 ▶) T min = 0.993, T max = 0.995
12039 measured reflections
3099 independent reflections
2199 reflections with I > 2σ(I)
R int = 0.074
Refinement
R[F 2 > 2σ(F 2)] = 0.050
wR(F 2) = 0.131
S = 1.00
3099 reflections
205 parameters
H atoms treated by a mixture of independent and constrained refinement
Δρmax = 0.17 e Å−3
Δρmin = −0.19 e Å−3
Data collection: SMART (Bruker, 1997 ▶); cell refinement: SAINT (Bruker, 1999 ▶); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: SHELXTL (Sheldrick, 2008 ▶); software used to prepare material for publication: PLATON (Spek, 2003 ▶).
Supplementary Material
Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536808042372/lh2743sup1.cif
Structure factors: contains datablocks I. DOI: 10.1107/S1600536808042372/lh2743Isup2.hkl
Additional supplementary materials: crystallographic information; 3D view; checkCIF report
Table 1. Hydrogen-bond geometry (Å, °).
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| O2—H2A⋯O1 | 1.16 (2) | 1.38 (2) | 2.4720 (16) | 154 (2) |
Acknowledgments
The authors are grateful to Hubei Normal University for financial support.
supplementary crystallographic information
Comment
1,3-Diketones are interesting due to their enolic tautomeric forms and their ability to form strong intermolecular or intramolecular hydrogen bonds (Bertolasi et al., 1991; Vila et al., 1991). They are used widely in the chemistry of metallocomplexes (Baskar et al., 2005; Bassett et al., 2004; Jang et al., 2006; Soldatov et al., 2003). The title compound (I) (Fig. 1), is in the enol form stabilized by an intramolecular O-H···O hydrogen bond (see Table 1).
Experimental
1-(4-fluorophenyl)ethanone (1.38 g, 0.01 mol), methyl 4-tert-butylbenzoate (1.92 g, 0.01 mol), NaNH2 (0.78 g, 0.02 mol) and dry ether (60 ml) were placed into round bottom flask. The mixture was stirred for 6 h at room temperature under a blanket of nitrogen, acidified with dilute hydrochloric acid, and stirring was continued until all solids dissolved. The ether layer was separated and washed with saturated NaHCO3 solution, dried over anhydrous Na2SO4 and was removed by evaporation. The residual solid was recrystallized from ethanol solution to give the title compound (I) (yield 1.78 g, 59.6%, m.p. 388 K). Crystals suitable for X-ray diffraction were grown by slow evaporation of a CHCl3—EtOH (1:4) solution of the title compound at room temperature.
Refinement
H atoms were placed in geometrically idealized positions and constrained to ride on their parent atoms, with C—H distances of 0.93 to 0.96 Å, and with Uiso(H) = 1.2 Ueq(C). The H atom of the hydroxyl group was located in a difference Fourier map and its position was refined freely, with Uiso(H) = 1.5 Uiso(O).
Figures
Fig. 1.
The molecular structure of (I). Displacement ellipsoids are drawn at the 50% probability level. The dashed line indicates a intramolecular hydrogen bond.
Crystal data
| C19H19FO2 | F(000) = 632 |
| Mr = 298.34 | Dx = 1.251 Mg m−3 |
| Monoclinic, P21/n | Melting point: 388 K |
| Hall symbol: -P 2yn | Mo Kα radiation, λ = 0.71073 Å |
| a = 9.8349 (12) Å | Cell parameters from 3223 reflections |
| b = 10.0163 (13) Å | θ = 2.3–22.9° |
| c = 16.232 (2) Å | µ = 0.09 mm−1 |
| β = 97.788 (2)° | T = 298 K |
| V = 1584.3 (3) Å3 | Block, colorless |
| Z = 4 | 0.20 × 0.10 × 0.10 mm |
Data collection
| Bruker SMART CCD diffractometer | 3099 independent reflections |
| Radiation source: fine-focus sealed tube | 2199 reflections with I > 2σ(I) |
| graphite | Rint = 0.074 |
| φ and ω scans | θmax = 26.0°, θmin = 2.3° |
| Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −11→12 |
| Tmin = 0.993, Tmax = 0.995 | k = −12→12 |
| 12039 measured reflections | l = −19→19 |
Refinement
| 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)] = 0.050 | Hydrogen site location: inferred from neighbouring sites |
| wR(F2) = 0.131 | H atoms treated by a mixture of independent and constrained refinement |
| S = 1.00 | w = 1/[σ2(Fo2) + (0.07P)2] where P = (Fo2 + 2Fc2)/3 |
| 3099 reflections | (Δ/σ)max = 0.001 |
| 205 parameters | Δρmax = 0.17 e Å−3 |
| 0 restraints | Δρmin = −0.18 e Å−3 |
Special details
| 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. |
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2)
| x | y | z | Uiso*/Ueq | ||
| C1 | 0.12996 (18) | 0.09274 (19) | −0.07276 (10) | 0.0599 (5) | |
| C2 | 0.0803 (2) | 0.2198 (2) | −0.08119 (10) | 0.0666 (5) | |
| H2 | 0.0522 | 0.2559 | −0.1335 | 0.080* | |
| C3 | 0.07296 (18) | 0.29335 (17) | −0.01033 (9) | 0.0587 (5) | |
| H3 | 0.0401 | 0.3805 | −0.0150 | 0.070* | |
| C4 | 0.11376 (15) | 0.23969 (16) | 0.06796 (9) | 0.0457 (4) | |
| C5 | 0.16498 (16) | 0.11083 (17) | 0.07303 (9) | 0.0545 (4) | |
| H5 | 0.1943 | 0.0741 | 0.1250 | 0.065* | |
| C6 | 0.17340 (17) | 0.03602 (18) | 0.00290 (10) | 0.0596 (5) | |
| H6 | 0.2076 | −0.0506 | 0.0068 | 0.071* | |
| C7 | 0.09992 (16) | 0.32242 (16) | 0.14225 (9) | 0.0491 (4) | |
| C8 | 0.11727 (16) | 0.27023 (16) | 0.22333 (9) | 0.0499 (4) | |
| H8 | 0.1464 | 0.1824 | 0.2321 | 0.060* | |
| C9 | 0.09179 (16) | 0.34703 (16) | 0.29012 (9) | 0.0498 (4) | |
| C10 | 0.09963 (16) | 0.29479 (16) | 0.37555 (9) | 0.0475 (4) | |
| C11 | 0.01481 (18) | 0.34617 (16) | 0.42948 (10) | 0.0561 (4) | |
| H11 | −0.0459 | 0.4148 | 0.4118 | 0.067* | |
| C12 | 0.01961 (17) | 0.29659 (17) | 0.50883 (10) | 0.0565 (4) | |
| H12 | −0.0396 | 0.3319 | 0.5432 | 0.068* | |
| C13 | 0.10956 (15) | 0.19580 (15) | 0.53959 (9) | 0.0464 (4) | |
| C14 | 0.19521 (17) | 0.14742 (17) | 0.48502 (9) | 0.0557 (4) | |
| H14 | 0.2580 | 0.0808 | 0.5032 | 0.067* | |
| C15 | 0.19034 (17) | 0.19472 (17) | 0.40495 (9) | 0.0541 (4) | |
| H15 | 0.2488 | 0.1589 | 0.3702 | 0.065* | |
| C16 | 0.11634 (16) | 0.14446 (16) | 0.62880 (9) | 0.0512 (4) | |
| C17 | −0.02548 (19) | 0.1488 (2) | 0.65807 (11) | 0.0744 (6) | |
| H17A | −0.0544 | 0.2400 | 0.6614 | 0.112* | |
| H17B | −0.0205 | 0.1080 | 0.7119 | 0.112* | |
| H17C | −0.0903 | 0.1012 | 0.6193 | 0.112* | |
| C18 | 0.2134 (2) | 0.2360 (2) | 0.68505 (10) | 0.0774 (6) | |
| H18A | 0.3020 | 0.2364 | 0.6664 | 0.116* | |
| H18B | 0.2221 | 0.2039 | 0.7412 | 0.116* | |
| H18C | 0.1770 | 0.3250 | 0.6827 | 0.116* | |
| C19 | 0.1691 (2) | 0.00150 (18) | 0.63681 (12) | 0.0791 (6) | |
| H19A | 0.1140 | −0.0541 | 0.5973 | 0.119* | |
| H19B | 0.1639 | −0.0305 | 0.6920 | 0.119* | |
| H19C | 0.2628 | −0.0010 | 0.6262 | 0.119* | |
| F1 | 0.13561 (14) | 0.01881 (12) | −0.14199 (6) | 0.0933 (4) | |
| O1 | 0.06597 (13) | 0.44469 (12) | 0.12968 (7) | 0.0671 (4) | |
| O2 | 0.05431 (14) | 0.47163 (12) | 0.27994 (8) | 0.0720 (4) | |
| H2A | 0.050 (2) | 0.485 (2) | 0.2088 (15) | 0.108* |
Atomic displacement parameters (Å2)
| U11 | U22 | U33 | U12 | U13 | U23 | |
| C1 | 0.0655 (12) | 0.0679 (12) | 0.0478 (9) | 0.0042 (9) | 0.0136 (8) | −0.0004 (8) |
| C2 | 0.0872 (14) | 0.0695 (13) | 0.0436 (9) | 0.0131 (10) | 0.0110 (8) | 0.0131 (8) |
| C3 | 0.0709 (12) | 0.0531 (10) | 0.0526 (10) | 0.0069 (9) | 0.0105 (8) | 0.0105 (8) |
| C4 | 0.0383 (9) | 0.0509 (10) | 0.0480 (9) | −0.0008 (7) | 0.0060 (6) | 0.0057 (7) |
| C5 | 0.0546 (10) | 0.0619 (11) | 0.0458 (9) | 0.0075 (8) | 0.0026 (7) | 0.0083 (8) |
| C6 | 0.0628 (12) | 0.0584 (11) | 0.0574 (10) | 0.0130 (9) | 0.0080 (8) | 0.0037 (8) |
| C7 | 0.0445 (9) | 0.0480 (10) | 0.0540 (9) | −0.0026 (7) | 0.0035 (7) | 0.0054 (7) |
| C8 | 0.0547 (10) | 0.0466 (10) | 0.0475 (9) | 0.0040 (8) | 0.0040 (7) | 0.0024 (7) |
| C9 | 0.0493 (10) | 0.0455 (10) | 0.0525 (9) | −0.0028 (7) | −0.0003 (7) | −0.0013 (7) |
| C10 | 0.0484 (9) | 0.0456 (9) | 0.0468 (8) | −0.0007 (7) | 0.0004 (7) | −0.0062 (7) |
| C11 | 0.0625 (11) | 0.0490 (10) | 0.0560 (10) | 0.0152 (8) | 0.0049 (8) | 0.0000 (7) |
| C12 | 0.0612 (11) | 0.0559 (11) | 0.0537 (10) | 0.0124 (9) | 0.0128 (8) | −0.0052 (8) |
| C13 | 0.0465 (9) | 0.0443 (9) | 0.0475 (8) | −0.0021 (7) | 0.0028 (7) | −0.0069 (7) |
| C14 | 0.0547 (10) | 0.0603 (11) | 0.0507 (9) | 0.0163 (8) | 0.0017 (7) | 0.0021 (7) |
| C15 | 0.0531 (10) | 0.0615 (11) | 0.0480 (9) | 0.0132 (8) | 0.0075 (7) | −0.0049 (7) |
| C16 | 0.0502 (10) | 0.0554 (10) | 0.0471 (9) | −0.0006 (8) | 0.0029 (7) | −0.0021 (7) |
| C17 | 0.0699 (13) | 0.0938 (15) | 0.0614 (11) | −0.0013 (11) | 0.0153 (9) | 0.0105 (10) |
| C18 | 0.0857 (14) | 0.0914 (15) | 0.0515 (10) | −0.0224 (12) | −0.0039 (9) | −0.0023 (9) |
| C19 | 0.1093 (17) | 0.0651 (13) | 0.0644 (12) | 0.0161 (12) | 0.0167 (11) | 0.0115 (9) |
| F1 | 0.1407 (12) | 0.0884 (9) | 0.0527 (6) | 0.0260 (7) | 0.0201 (6) | −0.0074 (5) |
| O1 | 0.0956 (10) | 0.0484 (7) | 0.0566 (7) | 0.0054 (7) | 0.0083 (6) | 0.0085 (5) |
| O2 | 0.1083 (11) | 0.0459 (7) | 0.0598 (8) | 0.0109 (7) | 0.0044 (7) | −0.0007 (5) |
Geometric parameters (Å, °)
| C1—F1 | 1.3532 (19) | C11—H11 | 0.9300 |
| C1—C2 | 1.364 (3) | C12—C13 | 1.390 (2) |
| C1—C6 | 1.368 (2) | C12—H12 | 0.9300 |
| C2—C3 | 1.376 (2) | C13—C14 | 1.390 (2) |
| C2—H2 | 0.9300 | C13—C16 | 1.530 (2) |
| C3—C4 | 1.388 (2) | C14—C15 | 1.378 (2) |
| C3—H3 | 0.9300 | C14—H14 | 0.9300 |
| C4—C5 | 1.384 (2) | C15—H15 | 0.9300 |
| C4—C7 | 1.485 (2) | C16—C19 | 1.523 (2) |
| C5—C6 | 1.375 (2) | C16—C18 | 1.533 (2) |
| C5—H5 | 0.9300 | C16—C17 | 1.534 (2) |
| C6—H6 | 0.9300 | C17—H17A | 0.9600 |
| C7—O1 | 1.2784 (19) | C17—H17B | 0.9600 |
| C7—C8 | 1.405 (2) | C17—H17C | 0.9600 |
| C8—C9 | 1.380 (2) | C18—H18A | 0.9600 |
| C8—H8 | 0.9300 | C18—H18B | 0.9600 |
| C9—O2 | 1.3054 (19) | C18—H18C | 0.9600 |
| C9—C10 | 1.474 (2) | C19—H19A | 0.9600 |
| C10—C15 | 1.383 (2) | C19—H19B | 0.9600 |
| C10—C11 | 1.387 (2) | C19—H19C | 0.9600 |
| C11—C12 | 1.375 (2) | O2—H2A | 1.16 (2) |
| F1—C1—C2 | 118.81 (15) | C14—C13—C12 | 115.83 (14) |
| F1—C1—C6 | 118.39 (16) | C14—C13—C16 | 122.26 (14) |
| C2—C1—C6 | 122.81 (16) | C12—C13—C16 | 121.89 (14) |
| C1—C2—C3 | 118.32 (15) | C15—C14—C13 | 122.32 (15) |
| C1—C2—H2 | 120.8 | C15—C14—H14 | 118.8 |
| C3—C2—H2 | 120.8 | C13—C14—H14 | 118.8 |
| C2—C3—C4 | 121.11 (16) | C14—C15—C10 | 120.86 (15) |
| C2—C3—H3 | 119.4 | C14—C15—H15 | 119.6 |
| C4—C3—H3 | 119.4 | C10—C15—H15 | 119.6 |
| C5—C4—C3 | 118.25 (14) | C19—C16—C13 | 111.57 (14) |
| C5—C4—C7 | 123.03 (13) | C19—C16—C18 | 109.51 (15) |
| C3—C4—C7 | 118.72 (14) | C13—C16—C18 | 107.85 (13) |
| C6—C5—C4 | 121.43 (14) | C19—C16—C17 | 108.31 (15) |
| C6—C5—H5 | 119.3 | C13—C16—C17 | 111.03 (13) |
| C4—C5—H5 | 119.3 | C18—C16—C17 | 108.51 (15) |
| C1—C6—C5 | 118.07 (16) | C16—C17—H17A | 109.5 |
| C1—C6—H6 | 121.0 | C16—C17—H17B | 109.5 |
| C5—C6—H6 | 121.0 | H17A—C17—H17B | 109.5 |
| O1—C7—C8 | 120.13 (14) | C16—C17—H17C | 109.5 |
| O1—C7—C4 | 117.12 (13) | H17A—C17—H17C | 109.5 |
| C8—C7—C4 | 122.71 (14) | H17B—C17—H17C | 109.5 |
| C9—C8—C7 | 121.11 (15) | C16—C18—H18A | 109.5 |
| C9—C8—H8 | 119.4 | C16—C18—H18B | 109.5 |
| C7—C8—H8 | 119.4 | H18A—C18—H18B | 109.5 |
| O2—C9—C8 | 120.78 (14) | C16—C18—H18C | 109.5 |
| O2—C9—C10 | 115.86 (14) | H18A—C18—H18C | 109.5 |
| C8—C9—C10 | 123.32 (15) | H18B—C18—H18C | 109.5 |
| C15—C10—C11 | 117.77 (15) | C16—C19—H19A | 109.5 |
| C15—C10—C9 | 122.06 (14) | C16—C19—H19B | 109.5 |
| C11—C10—C9 | 120.17 (15) | H19A—C19—H19B | 109.5 |
| C12—C11—C10 | 120.64 (15) | C16—C19—H19C | 109.5 |
| C12—C11—H11 | 119.7 | H19A—C19—H19C | 109.5 |
| C10—C11—H11 | 119.7 | H19B—C19—H19C | 109.5 |
| C11—C12—C13 | 122.56 (15) | C7—O1—H2A | 101.2 (10) |
| C11—C12—H12 | 118.7 | C7—O1—H2A | 101.2 (10) |
| C13—C12—H12 | 118.7 | C9—O2—H2A | 102.1 (11) |
| F1—C1—C2—C3 | 178.96 (17) | O2—C9—C10—C11 | 29.4 (2) |
| C6—C1—C2—C3 | −0.5 (3) | C8—C9—C10—C11 | −148.40 (16) |
| C1—C2—C3—C4 | −0.5 (3) | C15—C10—C11—C12 | −1.3 (3) |
| C2—C3—C4—C5 | 1.3 (3) | C9—C10—C11—C12 | 178.87 (15) |
| C2—C3—C4—C7 | −178.35 (16) | C10—C11—C12—C13 | 1.2 (3) |
| C3—C4—C5—C6 | −1.2 (2) | C11—C12—C13—C14 | 0.0 (3) |
| C7—C4—C5—C6 | 178.49 (15) | C11—C12—C13—C16 | 178.28 (15) |
| F1—C1—C6—C5 | −178.81 (15) | C12—C13—C14—C15 | −0.9 (3) |
| C2—C1—C6—C5 | 0.6 (3) | C16—C13—C14—C15 | −179.20 (15) |
| C4—C5—C6—C1 | 0.2 (3) | C13—C14—C15—C10 | 0.7 (3) |
| C5—C4—C7—O1 | 172.32 (15) | C11—C10—C15—C14 | 0.4 (3) |
| C3—C4—C7—O1 | −8.0 (2) | C9—C10—C15—C14 | −179.79 (15) |
| C5—C4—C7—C8 | −10.2 (2) | C14—C13—C16—C19 | −27.3 (2) |
| C3—C4—C7—C8 | 169.45 (15) | C12—C13—C16—C19 | 154.50 (16) |
| O1—C7—C8—C9 | 3.2 (2) | C14—C13—C16—C18 | 93.01 (19) |
| C4—C7—C8—C9 | −174.20 (14) | C12—C13—C16—C18 | −85.19 (19) |
| C7—C8—C9—O2 | −1.8 (2) | C14—C13—C16—C17 | −148.23 (16) |
| C7—C8—C9—C10 | 175.89 (14) | C12—C13—C16—C17 | 33.6 (2) |
| O2—C9—C10—C15 | −150.37 (16) | C8—C7—O1—H2A | −3.3 (9) |
| C8—C9—C10—C15 | 31.8 (2) | C4—C7—O1—H2A | 174.2 (9) |
Hydrogen-bond geometry (Å, °)
| D—H···A | D—H | H···A | D···A | D—H···A |
| O2—H2A···O1 | 1.16 (2) | 1.38 (2) | 2.4720 (16) | 154 (2) |
Footnotes
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: LH2743).
References
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- Bruker (1997). SMART Bruker AXS Inc., Madison, Wisconsin, USA.
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Associated Data
This section collects any data citations, data availability statements, or supplementary materials included in this article.
Supplementary Materials
Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536808042372/lh2743sup1.cif
Structure factors: contains datablocks I. DOI: 10.1107/S1600536808042372/lh2743Isup2.hkl
Additional supplementary materials: crystallographic information; 3D view; checkCIF report

