organic compounds
1,1′-{[1,4-Phenylenebis(methylene)]bis(oxy)bis(4,1-phenylene)}diethanone
aDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
*Correspondence e-mail: khaledi@siswa.um.edu.my
The centroid of the central aromatic ring of the title molecule, C24H22O4, is located on an inversion center. The dihedral angle between the central and terminal benzene rings is 75.00 (7)°. In the crystal, molecules are linked through C—H⋯O hydrogen bonds into chains along [121]. The chains are connected into layers via C—H⋯π interactions.
Related literature
For related structures, see: Al-Mohammed et al. (2011); Hu (2010); Tang et al. (2008).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2007); cell SAINT (Bruker, 2007); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: X-SEED (Barbour, 2001); software used to prepare material for publication: SHELXL97 and publCIF (Westrip, 2010).
Supporting information
https://doi.org/10.1107/S160053681104565X/pv2469sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S160053681104565X/pv2469Isup2.hkl
To a suspension of α,α'-dibromo-p-xylene (1 g, 3.8 mmol) and potassium carbonate (1.05 g, 7.57 mmol) in dry acetone (25 ml), 4'-hydroxyacetophenone (1.03 g, 7.57 mmole) was added and the mixture was refluxed for 48 hr. The solvent was then evaporated under reduced pressure and the crude material was extracted with dichloromethane (3 x 25 ml). The combined organic layers were washed with water followed by brine and dried over anhydrous sodium sulfate. The solvent was evaporated under vacuum and the formed amorphous solid was re-crystallized from chloroform to obtain colorless crystals of the title compound (m.p. = 435–437 K).
Hydrogen atoms were placed at calculated positions and refined in riding mode with C—H distances of 0.95 (aryl), 0.98 (methyl) and 0.99 (methylene) Å, and Uiso(H) set to 1.2 (1.5 for methyl) Ueq(carrier atoms).
We have recently reported the π interactions (Table 1, Fig. 2).
of o-acetyl isomer of the title compound (Al-Mohammed et al., 2011). Similar to the previous structure, the title molecule shows a centrosymmetric molecular structure with the centroid of the central benzene ring being located on an inversion center. The central and terminal rings make a dihedral angle of 75.00 (7)°. This value is comparable to those observed in the structures of the previously reported isomer and some other similar compounds (Hu, 2010; Tang et al., 2008). In the crystal, the molecules are linked through C—H···O bonds into chains along [1 2 1] direction. The chains are connected into layers via C—H···For related structures, see: Al-Mohammed et al. (2011); Hu (2010); Tang et al. (2008).
Data collection: APEX2 (Bruker, 2007); cell
SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: X-SEED (Barbour, 2001); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008) and publCIF (Westrip, 2010).C24H22O4 | Z = 1 |
Mr = 374.42 | F(000) = 198 |
Triclinic, P1 | Dx = 1.368 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 8.1286 (12) Å | Cell parameters from 1506 reflections |
b = 8.1610 (7) Å | θ = 2.9–28.8° |
c = 8.4878 (6) Å | µ = 0.09 mm−1 |
α = 116.164 (5)° | T = 100 K |
β = 106.328 (7)° | Block, colorless |
γ = 100.196 (7)° | 0.23 × 0.19 × 0.09 mm |
V = 454.41 (8) Å3 |
Bruker APEXII CCD diffractometer | 1654 independent reflections |
Radiation source: fine-focus sealed tube | 1472 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.020 |
φ and ω scans | θmax = 25.5°, θmin = 2.8° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −9→9 |
Tmin = 0.979, Tmax = 0.992 | k = −9→9 |
2732 measured reflections | l = −10→10 |
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)] = 0.040 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.112 | H-atom parameters constrained |
S = 1.07 | w = 1/[σ2(Fo2) + (0.0644P)2 + 0.0983P] where P = (Fo2 + 2Fc2)/3 |
1654 reflections | (Δ/σ)max < 0.001 |
128 parameters | Δρmax = 0.20 e Å−3 |
0 restraints | Δρmin = −0.34 e Å−3 |
C24H22O4 | γ = 100.196 (7)° |
Mr = 374.42 | V = 454.41 (8) Å3 |
Triclinic, P1 | Z = 1 |
a = 8.1286 (12) Å | Mo Kα radiation |
b = 8.1610 (7) Å | µ = 0.09 mm−1 |
c = 8.4878 (6) Å | T = 100 K |
α = 116.164 (5)° | 0.23 × 0.19 × 0.09 mm |
β = 106.328 (7)° |
Bruker APEXII CCD diffractometer | 1654 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 1472 reflections with I > 2σ(I) |
Tmin = 0.979, Tmax = 0.992 | Rint = 0.020 |
2732 measured reflections |
R[F2 > 2σ(F2)] = 0.040 | 0 restraints |
wR(F2) = 0.112 | H-atom parameters constrained |
S = 1.07 | Δρmax = 0.20 e Å−3 |
1654 reflections | Δρmin = −0.34 e Å−3 |
128 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 | ||
O1 | 1.00611 (13) | 1.92652 (14) | 1.27797 (14) | 0.0228 (3) | |
O2 | 0.62238 (13) | 1.01503 (13) | 0.83520 (13) | 0.0192 (3) | |
C1 | 1.22612 (19) | 1.8825 (2) | 1.4939 (2) | 0.0246 (3) | |
H1A | 1.2907 | 2.0214 | 1.5498 | 0.037* | |
H1B | 1.3039 | 1.8086 | 1.4524 | 0.037* | |
H1C | 1.1976 | 1.8627 | 1.5904 | 0.037* | |
C2 | 1.05129 (18) | 1.8131 (2) | 1.32364 (19) | 0.0179 (3) | |
C3 | 0.93621 (18) | 1.60305 (19) | 1.20855 (18) | 0.0166 (3) | |
C4 | 0.97991 (18) | 1.4674 (2) | 1.25479 (18) | 0.0174 (3) | |
H4 | 1.0826 | 1.5113 | 1.3695 | 0.021* | |
C5 | 0.87715 (18) | 1.2701 (2) | 1.13753 (19) | 0.0174 (3) | |
H5 | 0.9082 | 1.1802 | 1.1722 | 0.021* | |
C6 | 0.72738 (18) | 1.20521 (19) | 0.96773 (18) | 0.0166 (3) | |
C7 | 0.67704 (18) | 1.3397 (2) | 0.92338 (19) | 0.0181 (3) | |
H7 | 0.5714 | 1.2964 | 0.8115 | 0.022* | |
C8 | 0.78030 (19) | 1.5347 (2) | 1.04150 (19) | 0.0181 (3) | |
H8 | 0.7455 | 1.6249 | 1.0095 | 0.022* | |
C9 | 0.67885 (19) | 0.86901 (19) | 0.86356 (19) | 0.0197 (3) | |
H9A | 0.6449 | 0.8585 | 0.9629 | 0.024* | |
H9B | 0.8132 | 0.9049 | 0.9071 | 0.024* | |
C10 | 0.58484 (18) | 0.67807 (19) | 0.67576 (19) | 0.0172 (3) | |
C11 | 0.64548 (18) | 0.64417 (19) | 0.52994 (19) | 0.0183 (3) | |
H11 | 0.7453 | 0.7424 | 0.5498 | 0.022* | |
C12 | 0.56143 (18) | 0.4684 (2) | 0.35604 (19) | 0.0176 (3) | |
H12 | 0.6038 | 0.4474 | 0.2576 | 0.021* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0258 (6) | 0.0168 (5) | 0.0241 (5) | 0.0062 (4) | 0.0077 (4) | 0.0111 (4) |
O2 | 0.0205 (5) | 0.0115 (5) | 0.0182 (5) | 0.0045 (4) | 0.0024 (4) | 0.0057 (4) |
C1 | 0.0232 (7) | 0.0162 (7) | 0.0236 (7) | 0.0013 (6) | 0.0030 (6) | 0.0080 (6) |
C2 | 0.0192 (7) | 0.0161 (7) | 0.0177 (7) | 0.0052 (6) | 0.0089 (6) | 0.0079 (6) |
C3 | 0.0171 (7) | 0.0161 (7) | 0.0164 (7) | 0.0052 (6) | 0.0080 (5) | 0.0078 (6) |
C4 | 0.0174 (7) | 0.0185 (7) | 0.0137 (6) | 0.0064 (5) | 0.0050 (5) | 0.0071 (6) |
C5 | 0.0206 (7) | 0.0160 (7) | 0.0178 (7) | 0.0079 (6) | 0.0078 (6) | 0.0099 (6) |
C6 | 0.0178 (7) | 0.0143 (7) | 0.0158 (7) | 0.0041 (5) | 0.0076 (6) | 0.0064 (6) |
C7 | 0.0181 (7) | 0.0179 (7) | 0.0151 (6) | 0.0056 (6) | 0.0041 (5) | 0.0078 (6) |
C8 | 0.0207 (7) | 0.0172 (7) | 0.0190 (7) | 0.0080 (6) | 0.0078 (6) | 0.0111 (6) |
C9 | 0.0226 (7) | 0.0154 (7) | 0.0190 (7) | 0.0077 (6) | 0.0046 (6) | 0.0091 (6) |
C10 | 0.0184 (7) | 0.0143 (7) | 0.0190 (7) | 0.0080 (5) | 0.0050 (5) | 0.0094 (6) |
C11 | 0.0168 (7) | 0.0165 (7) | 0.0225 (7) | 0.0050 (5) | 0.0060 (5) | 0.0124 (6) |
C12 | 0.0194 (7) | 0.0184 (7) | 0.0189 (7) | 0.0089 (6) | 0.0083 (5) | 0.0115 (6) |
O1—C2 | 1.2240 (16) | C6—C7 | 1.3967 (19) |
O2—C6 | 1.3617 (17) | C7—C8 | 1.375 (2) |
O2—C9 | 1.4398 (15) | C7—H7 | 0.9500 |
C1—C2 | 1.5059 (19) | C8—H8 | 0.9500 |
C1—H1A | 0.9800 | C9—C10 | 1.5020 (18) |
C1—H1B | 0.9800 | C9—H9A | 0.9900 |
C1—H1C | 0.9800 | C9—H9B | 0.9900 |
C2—C3 | 1.4866 (19) | C10—C11 | 1.3931 (19) |
C3—C4 | 1.3964 (19) | C10—C12i | 1.3954 (19) |
C3—C8 | 1.4035 (19) | C11—C12 | 1.3864 (19) |
C4—C5 | 1.387 (2) | C11—H11 | 0.9500 |
C4—H4 | 0.9500 | C12—C10i | 1.3954 (19) |
C5—C6 | 1.3972 (19) | C12—H12 | 0.9500 |
C5—H5 | 0.9500 | ||
C6—O2—C9 | 117.64 (10) | C8—C7—C6 | 120.06 (12) |
C2—C1—H1A | 109.5 | C8—C7—H7 | 120.0 |
C2—C1—H1B | 109.5 | C6—C7—H7 | 120.0 |
H1A—C1—H1B | 109.5 | C7—C8—C3 | 121.19 (13) |
C2—C1—H1C | 109.5 | C7—C8—H8 | 119.4 |
H1A—C1—H1C | 109.5 | C3—C8—H8 | 119.4 |
H1B—C1—H1C | 109.5 | O2—C9—C10 | 108.13 (10) |
O1—C2—C3 | 120.37 (12) | O2—C9—H9A | 110.1 |
O1—C2—C1 | 120.78 (12) | C10—C9—H9A | 110.1 |
C3—C2—C1 | 118.84 (12) | O2—C9—H9B | 110.1 |
C4—C3—C8 | 117.90 (13) | C10—C9—H9B | 110.1 |
C4—C3—C2 | 122.90 (12) | H9A—C9—H9B | 108.4 |
C8—C3—C2 | 119.15 (12) | C11—C10—C12i | 118.81 (13) |
C5—C4—C3 | 121.68 (12) | C11—C10—C9 | 119.68 (13) |
C5—C4—H4 | 119.2 | C12i—C10—C9 | 121.51 (12) |
C3—C4—H4 | 119.2 | C12—C11—C10 | 120.58 (13) |
C4—C5—C6 | 119.14 (13) | C12—C11—H11 | 119.7 |
C4—C5—H5 | 120.4 | C10—C11—H11 | 119.7 |
C6—C5—H5 | 120.4 | C11—C12—C10i | 120.60 (12) |
O2—C6—C7 | 115.22 (12) | C11—C12—H12 | 119.7 |
O2—C6—C5 | 124.87 (12) | C10i—C12—H12 | 119.7 |
C7—C6—C5 | 119.91 (13) |
Symmetry code: (i) −x+1, −y+1, −z+1. |
Cg1 is the centroid of the C3–C8 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
C11—H11···O1ii | 0.95 | 2.54 | 3.4362 (18) | 158 |
C12—H12···Cg1iii | 0.95 | 2.61 | 3.5078 (17) | 158 |
Symmetry codes: (ii) −x+2, −y+3, −z+2; (iii) x, y−1, z−1. |
Experimental details
Crystal data | |
Chemical formula | C24H22O4 |
Mr | 374.42 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 100 |
a, b, c (Å) | 8.1286 (12), 8.1610 (7), 8.4878 (6) |
α, β, γ (°) | 116.164 (5), 106.328 (7), 100.196 (7) |
V (Å3) | 454.41 (8) |
Z | 1 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.23 × 0.19 × 0.09 |
Data collection | |
Diffractometer | Bruker APEXII CCD |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.979, 0.992 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 2732, 1654, 1472 |
Rint | 0.020 |
(sin θ/λ)max (Å−1) | 0.606 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.040, 0.112, 1.07 |
No. of reflections | 1654 |
No. of parameters | 128 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.20, −0.34 |
Computer programs: APEX2 (Bruker, 2007), SAINT (Bruker, 2007), SHELXS97 (Sheldrick, 2008), X-SEED (Barbour, 2001), SHELXL97 (Sheldrick, 2008) and publCIF (Westrip, 2010).
Cg1 is the centroid of the C3–C8 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
C11—H11···O1i | 0.95 | 2.54 | 3.4362 (18) | 157.6 |
C12—H12···Cg1ii | 0.95 | 2.61 | 3.5078 (17) | 158 |
Symmetry codes: (i) −x+2, −y+3, −z+2; (ii) x, y−1, z−1. |
Acknowledgements
The authors thank the University of Malaya for funding this study (FRGS grant No. FP001/2010 A).
References
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We have recently reported the crystal structure of o-acetyl isomer of the title compound (Al-Mohammed et al., 2011). Similar to the previous structure, the title molecule shows a centrosymmetric molecular structure with the centroid of the central benzene ring being located on an inversion center. The central and terminal rings make a dihedral angle of 75.00 (7)°. This value is comparable to those observed in the structures of the previously reported isomer and some other similar compounds (Hu, 2010; Tang et al., 2008). In the crystal, the molecules are linked through C—H···O bonds into chains along [1 2 1] direction. The chains are connected into layers via C—H···π interactions (Table 1, Fig. 2).