organic compounds
(E)-1-(4,4′′-Difluoro-5′-methoxy-1,1′:3′,1′′-terphenyl-4′-yl)-3-(4-methoxyphenyl)prop-2-en-1-one
aNelson Mandela Metropolitan University, Summerstrand Campus, Department of Chemistry, University Way, Summerstrand, PO Box 77000, Port Elizabeth 6031, South Africa, bMangalore University, Department of Studies in Chemistry, Mangalagangotri 574 199, India, and cUniversity of Mysore, Department of Studies in Chemistry, Manasagangotri, Mysore 570 006, India
*Correspondence e-mail: richard.betz@webmail.co.za
The title compound, C29H22F2O3, is a meta-terphenyl derivative featuring a Michael-system-derived substituent with an E-configured C=C function. In the crystal, C—H⋯O and C—H⋯F contacts connect the molecules into planes parallel to (101). The shortest centroid–centroid distance between two aromatic systems is 3.7169 (7) Å and is apparent between the terminal benzene ring of the Michael-system-derived substituent and its symmetry-generated equivalent.
Related literature
For the pharmacological importance of terphenyls, see: Liu (2006) and of see: Dhar (1981); Dimmock et al. (1999); Satyanarayana et al. (2004). For our work on the synthesis of different chalcone derivatives, see: Samshuddin et al. (2011); Fun et al. (2010); Jasinski et al. (2010); Baktır et al. (2011). For graph-set analysis of hydrogen bonds, see: Etter et al. (1990); Bernstein et al. (1995).
Experimental
Crystal data
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Data collection
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Refinement
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Data collection: APEX2 (Bruker, 2010); cell SAINT (Bruker, 2010); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and Mercury (Macrae et al., 2008); software used to prepare material for publication: SHELXL97 and PLATON (Spek, 2009).
Supporting information
https://doi.org/10.1107/S1600536811047696/qk2026sup1.cif
contains datablocks I, global. DOI:Supporting information file. DOI: https://doi.org/10.1107/S1600536811047696/qk2026Isup2.cdx
Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536811047696/qk2026Isup3.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536811047696/qk2026Isup4.cml
To a mixture of 1-(4,4''-difluoro-5'-methoxy-1,1':3',1''-terphenyl-4'-yl) ethanone (3.38 g, 0.01 mol) and anisaldehyde (1.36 g, 0.01 mol) in 30 ml e thanol, 10 ml of 10% sodium hydroxide solution was added and stirred at 5–10 °C for 3 h. The precipitate formed was collected by filtration and purified by recrystallization from ethanol (yield: 79%). Single crystals suitable for the X-ray diffraction study were grown from DMF by slow evaporation at room temperature.
Carbon-bound H atoms were placed in calculated positions (C—H 0.95 Å and C—H 0.98 Å for the methyl groups, see below) and were included in the
in the riding model approximation, with U(H) set to 1.2Ueq(C). The H atoms of the methyl groups were allowed to rotate with a fixed angle around the C—C bond to best fit the experimental electron density (HFIX 137 in the SHELX program suite (Sheldrick, 2008)), with U(H) set to 1.5Ueq(C).Chalcones constitute an important family of substances belonging to
a large group of natural and synthetic products with interesting physicochemical properties, biological activity and structural characteristics. They have been reported to possess many interesting pharmacological activities (Dhar, 1981) including anti-inflammatory, antimicrobial, antifungal, antioxidant, cytotoxic, antitumor and anticancer activities (Dimmock et al., 1999; Satyanarayana et al., 2004). In recent years, it has been reported that some terphenyls exhibit considerable biological activities (e.g. being potent anticoagulants, immunosuppressants, antithrombotics, neuroprotectives, specific 5-lipoxygenase inhibitors) and showing cytotoxic activities (Liu, 2006). In view of the pharmacological importance of terphenyls and and in continuation of our work on synthesis of various derivatives of 4,4'-difluoro chalcone (Samshuddin et al., 2011, Fun et al., 2010, Jasinski et al., 2010, Baktır et al., 2011), the molecular and of the title compound is reported.The C=C function along the Michael system is (E)-configured. The least-squares planes defined by the respective carbon atoms of the individual para-fluorophenyl moieties enclose angles of 25.42 (5) ° and 64.01 (5) ° with the plane defined by the carbon atoms of the terphenyl's central phenyl ring.
In the crystal, C–H···O as well as C–H···F contacts can be observed whose range falls by more than 0.1 Å below the sum of van-der-Waals radii of the respective atoms. The C–H···O contacts stem from one of the hydrogen atoms of a para-fluoro phenyl moiety and one of the methoxy groups and invariably apply the ketonic oxygen atom as acceptor. The C–H···F contacts are exclusively supported by the vinylic hydrogen atom on the Michael system. In terms of graph-set analysis (Etter et al., 1990; Bernstein et al., 1995), the descriptor for the C–H···F contacts is R22(26) on the unitary level while the C–H···O contacts necessitate a C11(9)C11(10) descriptor on the same level. In total, the molecules are connected to planes parallel (1 0 1). The shortest intercentroid distance between two ring centroids was found at 3.7169 (7) Å and is apparent between the methoxyphenyl moiety connected to the Michael system and its symmetry-generated equivalents. Details about metrical parameters of the C–H···O and C–H···F contacts as well as information about their symmetry can be found in Table 1 (Fig. 2).
For the pharmacological importance of terphenyls, see: Liu (2006) and of
see: Dhar (1981); Dimmock et al. (1999); Satyanarayana et al. (2004). For our work on the synthesis of different chalcone derivatives, see: Samshuddin et al. (2011); Fun et al. (2010); Jasinski et al. (2010); Baktır et al. (2011). For graph-set analysis of hydrogen bonds, see: Etter et al. (1990); Bernstein et al. (1995).Data collection: APEX2 (Bruker, 2010); cell
SAINT (Bruker, 2010); data reduction: SAINT (Bruker, 2010); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and Mercury (Macrae et al., 2008); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009).C29H22F2O3 | F(000) = 952 |
Mr = 456.47 | Dx = 1.332 Mg m−3 |
Monoclinic, P21/c | Melting point: 453 K |
Hall symbol: -P 2ybc | Mo Kα radiation, λ = 0.71073 Å |
a = 9.6059 (2) Å | Cell parameters from 9984 reflections |
b = 19.2236 (5) Å | θ = 2.3–28.3° |
c = 13.3772 (3) Å | µ = 0.10 mm−1 |
β = 112.905 (1)° | T = 200 K |
V = 2275.46 (9) Å3 | Block, colourless |
Z = 4 | 0.54 × 0.51 × 0.51 mm |
Bruker APEXII CCD diffractometer | 4754 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.032 |
Graphite monochromator | θmax = 28.3°, θmin = 2.0° |
φ and ω scans | h = −12→12 |
20209 measured reflections | k = −25→16 |
5655 independent reflections | l = −17→17 |
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)] = 0.045 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.125 | H-atom parameters constrained |
S = 1.03 | w = 1/[σ2(Fo2) + (0.0584P)2 + 0.9094P] where P = (Fo2 + 2Fc2)/3 |
5655 reflections | (Δ/σ)max < 0.001 |
309 parameters | Δρmax = 0.37 e Å−3 |
0 restraints | Δρmin = −0.28 e Å−3 |
C29H22F2O3 | V = 2275.46 (9) Å3 |
Mr = 456.47 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 9.6059 (2) Å | µ = 0.10 mm−1 |
b = 19.2236 (5) Å | T = 200 K |
c = 13.3772 (3) Å | 0.54 × 0.51 × 0.51 mm |
β = 112.905 (1)° |
Bruker APEXII CCD diffractometer | 4754 reflections with I > 2σ(I) |
20209 measured reflections | Rint = 0.032 |
5655 independent reflections |
R[F2 > 2σ(F2)] = 0.045 | 0 restraints |
wR(F2) = 0.125 | H-atom parameters constrained |
S = 1.03 | Δρmax = 0.37 e Å−3 |
5655 reflections | Δρmin = −0.28 e Å−3 |
309 parameters |
x | y | z | Uiso*/Ueq | ||
F1 | 1.26002 (12) | 0.02346 (5) | 0.34310 (8) | 0.0531 (3) | |
F2 | 1.29595 (14) | 0.18370 (8) | 1.21317 (8) | 0.0771 (4) | |
O1 | 0.72100 (12) | 0.25739 (5) | 0.81288 (8) | 0.0372 (2) | |
O2 | 0.56634 (10) | 0.17164 (5) | 0.56481 (7) | 0.0331 (2) | |
O3 | 0.22589 (11) | −0.09964 (5) | 0.91422 (8) | 0.0364 (2) | |
C1 | 0.70335 (13) | 0.19685 (6) | 0.78248 (9) | 0.0255 (2) | |
C2 | 0.59846 (14) | 0.15198 (7) | 0.80742 (10) | 0.0295 (3) | |
H2 | 0.5335 | 0.1731 | 0.8369 | 0.035* | |
C3 | 0.58766 (13) | 0.08347 (7) | 0.79165 (10) | 0.0271 (2) | |
H3 | 0.6480 | 0.0636 | 0.7572 | 0.033* | |
C4 | 0.48881 (15) | 0.16369 (9) | 0.45031 (11) | 0.0394 (3) | |
H4A | 0.4974 | 0.1154 | 0.4301 | 0.059* | |
H4B | 0.5338 | 0.1947 | 0.4129 | 0.059* | |
H4C | 0.3820 | 0.1756 | 0.4293 | 0.059* | |
C5 | 0.23701 (19) | −0.17318 (8) | 0.90367 (14) | 0.0429 (3) | |
H5A | 0.3431 | −0.1874 | 0.9382 | 0.064* | |
H5B | 0.1975 | −0.1857 | 0.8266 | 0.064* | |
H5C | 0.1780 | −0.1969 | 0.9390 | 0.064* | |
C11 | 0.79205 (13) | 0.16861 (6) | 0.71955 (9) | 0.0236 (2) | |
C12 | 0.71812 (13) | 0.15845 (6) | 0.60728 (9) | 0.0245 (2) | |
C13 | 0.79734 (13) | 0.13784 (7) | 0.54504 (9) | 0.0262 (2) | |
H13 | 0.7452 | 0.1310 | 0.4692 | 0.031* | |
C14 | 0.95320 (13) | 0.12709 (6) | 0.59309 (9) | 0.0257 (2) | |
C15 | 1.02729 (13) | 0.13882 (7) | 0.70402 (10) | 0.0283 (3) | |
H15 | 1.1338 | 0.1330 | 0.7372 | 0.034* | |
C16 | 0.94848 (13) | 0.15899 (6) | 0.76765 (9) | 0.0256 (2) | |
C21 | 1.03663 (13) | 0.10142 (7) | 0.52704 (10) | 0.0265 (2) | |
C22 | 0.98189 (16) | 0.11293 (9) | 0.41562 (11) | 0.0384 (3) | |
H22 | 0.8925 | 0.1396 | 0.3816 | 0.046* | |
C23 | 1.05596 (18) | 0.08598 (9) | 0.35336 (12) | 0.0435 (4) | |
H23 | 1.0168 | 0.0929 | 0.2771 | 0.052* | |
C24 | 1.18607 (17) | 0.04932 (8) | 0.40404 (12) | 0.0366 (3) | |
C25 | 1.24621 (17) | 0.03782 (8) | 0.51371 (12) | 0.0404 (3) | |
H25 | 1.3383 | 0.0130 | 0.5472 | 0.048* | |
C26 | 1.16917 (15) | 0.06331 (8) | 0.57462 (11) | 0.0353 (3) | |
H26 | 1.2078 | 0.0545 | 0.6505 | 0.042* | |
C31 | 1.03597 (13) | 0.16740 (7) | 0.88673 (9) | 0.0290 (3) | |
C32 | 1.1509 (2) | 0.21657 (9) | 0.92460 (12) | 0.0494 (4) | |
H32 | 1.1697 | 0.2463 | 0.8745 | 0.059* | |
C33 | 1.2391 (2) | 0.22275 (11) | 1.03526 (14) | 0.0601 (5) | |
H33 | 1.3168 | 0.2567 | 1.0615 | 0.072* | |
C34 | 1.21002 (18) | 0.17847 (11) | 1.10472 (11) | 0.0501 (4) | |
C35 | 1.10140 (19) | 0.12816 (12) | 1.07091 (12) | 0.0538 (5) | |
H35 | 1.0867 | 0.0973 | 1.1214 | 0.065* | |
C36 | 1.01272 (16) | 0.12334 (10) | 0.96049 (11) | 0.0442 (4) | |
H36 | 0.9351 | 0.0893 | 0.9354 | 0.053* | |
C41 | 0.49220 (13) | 0.03587 (6) | 0.82201 (9) | 0.0261 (2) | |
C42 | 0.49079 (14) | −0.03467 (7) | 0.79823 (10) | 0.0298 (3) | |
H42 | 0.5519 | −0.0509 | 0.7618 | 0.036* | |
C43 | 0.40287 (15) | −0.08220 (7) | 0.82603 (10) | 0.0310 (3) | |
H43 | 0.4035 | −0.1301 | 0.8086 | 0.037* | |
C44 | 0.31392 (14) | −0.05848 (7) | 0.87982 (10) | 0.0282 (2) | |
C45 | 0.31186 (14) | 0.01215 (7) | 0.90335 (10) | 0.0285 (3) | |
H45 | 0.2493 | 0.0283 | 0.9387 | 0.034* | |
C46 | 0.39985 (13) | 0.05836 (7) | 0.87571 (10) | 0.0272 (2) | |
H46 | 0.3985 | 0.1062 | 0.8930 | 0.033* |
U11 | U22 | U33 | U12 | U13 | U23 | |
F1 | 0.0621 (6) | 0.0616 (6) | 0.0549 (6) | 0.0049 (5) | 0.0437 (5) | −0.0110 (5) |
F2 | 0.0674 (7) | 0.1271 (12) | 0.0192 (4) | 0.0025 (7) | −0.0025 (4) | −0.0068 (5) |
O1 | 0.0469 (6) | 0.0328 (5) | 0.0397 (5) | −0.0057 (4) | 0.0254 (4) | −0.0092 (4) |
O2 | 0.0227 (4) | 0.0522 (6) | 0.0219 (4) | 0.0035 (4) | 0.0059 (3) | −0.0026 (4) |
O3 | 0.0441 (5) | 0.0325 (5) | 0.0414 (5) | −0.0044 (4) | 0.0263 (4) | −0.0002 (4) |
C1 | 0.0262 (5) | 0.0306 (6) | 0.0199 (5) | 0.0001 (4) | 0.0093 (4) | −0.0011 (4) |
C2 | 0.0301 (6) | 0.0349 (7) | 0.0283 (6) | 0.0000 (5) | 0.0168 (5) | −0.0023 (5) |
C3 | 0.0258 (5) | 0.0345 (6) | 0.0229 (5) | 0.0010 (5) | 0.0115 (4) | −0.0011 (5) |
C4 | 0.0257 (6) | 0.0624 (9) | 0.0237 (6) | 0.0019 (6) | 0.0027 (5) | −0.0031 (6) |
C5 | 0.0580 (9) | 0.0317 (7) | 0.0477 (8) | −0.0039 (6) | 0.0301 (7) | 0.0011 (6) |
C11 | 0.0260 (5) | 0.0260 (5) | 0.0197 (5) | −0.0005 (4) | 0.0100 (4) | −0.0003 (4) |
C12 | 0.0222 (5) | 0.0294 (6) | 0.0211 (5) | −0.0003 (4) | 0.0074 (4) | 0.0001 (4) |
C13 | 0.0271 (5) | 0.0329 (6) | 0.0173 (5) | 0.0003 (5) | 0.0073 (4) | −0.0011 (4) |
C14 | 0.0271 (5) | 0.0306 (6) | 0.0207 (5) | 0.0018 (4) | 0.0107 (4) | 0.0003 (4) |
C15 | 0.0235 (5) | 0.0380 (7) | 0.0220 (5) | 0.0036 (5) | 0.0072 (4) | −0.0008 (5) |
C16 | 0.0271 (5) | 0.0302 (6) | 0.0183 (5) | 0.0010 (4) | 0.0077 (4) | 0.0001 (4) |
C21 | 0.0279 (5) | 0.0313 (6) | 0.0221 (5) | −0.0005 (5) | 0.0115 (4) | −0.0021 (4) |
C22 | 0.0366 (7) | 0.0549 (9) | 0.0268 (6) | 0.0100 (6) | 0.0159 (5) | 0.0044 (6) |
C23 | 0.0479 (8) | 0.0624 (10) | 0.0267 (6) | 0.0050 (7) | 0.0216 (6) | 0.0004 (6) |
C24 | 0.0436 (7) | 0.0390 (7) | 0.0387 (7) | −0.0023 (6) | 0.0286 (6) | −0.0078 (6) |
C25 | 0.0364 (7) | 0.0469 (8) | 0.0411 (8) | 0.0104 (6) | 0.0187 (6) | −0.0023 (6) |
C26 | 0.0341 (6) | 0.0456 (8) | 0.0269 (6) | 0.0074 (6) | 0.0124 (5) | −0.0008 (5) |
C31 | 0.0257 (5) | 0.0408 (7) | 0.0194 (5) | 0.0054 (5) | 0.0074 (4) | −0.0016 (5) |
C32 | 0.0554 (9) | 0.0532 (9) | 0.0264 (7) | −0.0139 (7) | 0.0017 (6) | 0.0016 (6) |
C33 | 0.0619 (11) | 0.0666 (12) | 0.0312 (8) | −0.0165 (9) | −0.0042 (7) | −0.0058 (8) |
C34 | 0.0407 (8) | 0.0827 (13) | 0.0188 (6) | 0.0093 (8) | 0.0028 (5) | −0.0045 (7) |
C35 | 0.0420 (8) | 0.0962 (14) | 0.0243 (7) | 0.0009 (8) | 0.0143 (6) | 0.0119 (8) |
C36 | 0.0336 (7) | 0.0730 (11) | 0.0255 (6) | −0.0064 (7) | 0.0110 (5) | 0.0056 (7) |
C41 | 0.0255 (5) | 0.0307 (6) | 0.0223 (5) | 0.0013 (4) | 0.0095 (4) | 0.0003 (4) |
C42 | 0.0323 (6) | 0.0332 (6) | 0.0282 (6) | 0.0015 (5) | 0.0165 (5) | −0.0032 (5) |
C43 | 0.0364 (6) | 0.0282 (6) | 0.0306 (6) | 0.0000 (5) | 0.0154 (5) | −0.0034 (5) |
C44 | 0.0281 (6) | 0.0323 (6) | 0.0243 (6) | −0.0012 (5) | 0.0102 (4) | 0.0020 (5) |
C45 | 0.0274 (5) | 0.0346 (6) | 0.0260 (6) | 0.0039 (5) | 0.0130 (5) | 0.0006 (5) |
C46 | 0.0277 (5) | 0.0285 (6) | 0.0259 (6) | 0.0032 (4) | 0.0109 (4) | −0.0004 (5) |
F1—C24 | 1.3663 (14) | C21—C22 | 1.3917 (17) |
F2—C34 | 1.3652 (16) | C22—C23 | 1.3892 (18) |
O1—C1 | 1.2227 (16) | C22—H22 | 0.9500 |
O2—C12 | 1.3668 (14) | C23—C24 | 1.363 (2) |
O2—C4 | 1.4269 (15) | C23—H23 | 0.9500 |
O3—C44 | 1.3623 (15) | C24—C25 | 1.369 (2) |
O3—C5 | 1.4290 (17) | C25—C26 | 1.3860 (18) |
C1—C2 | 1.4602 (17) | C25—H25 | 0.9500 |
C1—C11 | 1.5125 (15) | C26—H26 | 0.9500 |
C2—C3 | 1.3315 (18) | C31—C36 | 1.383 (2) |
C2—H2 | 0.9500 | C31—C32 | 1.390 (2) |
C3—C41 | 1.4604 (17) | C32—C33 | 1.395 (2) |
C3—H3 | 0.9500 | C32—H32 | 0.9500 |
C4—H4A | 0.9800 | C33—C34 | 1.367 (3) |
C4—H4B | 0.9800 | C33—H33 | 0.9500 |
C4—H4C | 0.9800 | C34—C35 | 1.364 (3) |
C5—H5A | 0.9800 | C35—C36 | 1.392 (2) |
C5—H5B | 0.9800 | C35—H35 | 0.9500 |
C5—H5C | 0.9800 | C36—H36 | 0.9500 |
C11—C16 | 1.3978 (16) | C41—C42 | 1.3919 (18) |
C11—C12 | 1.4028 (15) | C41—C46 | 1.4093 (16) |
C12—C13 | 1.3865 (16) | C42—C43 | 1.3894 (18) |
C13—C14 | 1.3958 (16) | C42—H42 | 0.9500 |
C13—H13 | 0.9500 | C43—C44 | 1.3909 (17) |
C14—C15 | 1.3919 (16) | C43—H43 | 0.9500 |
C14—C21 | 1.4892 (16) | C44—C45 | 1.3955 (18) |
C15—C16 | 1.3962 (16) | C45—C46 | 1.3724 (17) |
C15—H15 | 0.9500 | C45—H45 | 0.9500 |
C16—C31 | 1.4927 (16) | C46—H46 | 0.9500 |
C21—C26 | 1.3901 (18) | ||
C12—O2—C4 | 116.93 (9) | C24—C23—H23 | 120.7 |
C44—O3—C5 | 117.47 (11) | C22—C23—H23 | 120.7 |
O1—C1—C2 | 120.33 (11) | C23—C24—F1 | 118.70 (13) |
O1—C1—C11 | 119.44 (11) | C23—C24—C25 | 122.62 (12) |
C2—C1—C11 | 120.22 (11) | F1—C24—C25 | 118.68 (13) |
C3—C2—C1 | 124.49 (11) | C24—C25—C26 | 118.27 (13) |
C3—C2—H2 | 117.8 | C24—C25—H25 | 120.9 |
C1—C2—H2 | 117.8 | C26—C25—H25 | 120.9 |
C2—C3—C41 | 126.46 (11) | C25—C26—C21 | 121.37 (13) |
C2—C3—H3 | 116.8 | C25—C26—H26 | 119.3 |
C41—C3—H3 | 116.8 | C21—C26—H26 | 119.3 |
O2—C4—H4A | 109.5 | C36—C31—C32 | 118.83 (13) |
O2—C4—H4B | 109.5 | C36—C31—C16 | 120.99 (12) |
H4A—C4—H4B | 109.5 | C32—C31—C16 | 119.99 (12) |
O2—C4—H4C | 109.5 | C31—C32—C33 | 120.81 (15) |
H4A—C4—H4C | 109.5 | C31—C32—H32 | 119.6 |
H4B—C4—H4C | 109.5 | C33—C32—H32 | 119.6 |
O3—C5—H5A | 109.5 | C34—C33—C32 | 117.92 (16) |
O3—C5—H5B | 109.5 | C34—C33—H33 | 121.0 |
H5A—C5—H5B | 109.5 | C32—C33—H33 | 121.0 |
O3—C5—H5C | 109.5 | C35—C34—F2 | 118.20 (16) |
H5A—C5—H5C | 109.5 | C35—C34—C33 | 123.25 (14) |
H5B—C5—H5C | 109.5 | F2—C34—C33 | 118.54 (17) |
C16—C11—C12 | 118.68 (10) | C34—C35—C36 | 118.18 (15) |
C16—C11—C1 | 121.93 (10) | C34—C35—H35 | 120.9 |
C12—C11—C1 | 119.06 (10) | C36—C35—H35 | 120.9 |
O2—C12—C13 | 123.33 (10) | C31—C36—C35 | 120.96 (15) |
O2—C12—C11 | 115.64 (10) | C31—C36—H36 | 119.5 |
C13—C12—C11 | 121.01 (10) | C35—C36—H36 | 119.5 |
C12—C13—C14 | 120.45 (10) | C42—C41—C46 | 117.60 (11) |
C12—C13—H13 | 119.8 | C42—C41—C3 | 119.88 (11) |
C14—C13—H13 | 119.8 | C46—C41—C3 | 122.52 (11) |
C15—C14—C13 | 118.60 (10) | C43—C42—C41 | 122.17 (11) |
C15—C14—C21 | 121.09 (11) | C43—C42—H42 | 118.9 |
C13—C14—C21 | 120.28 (10) | C41—C42—H42 | 118.9 |
C14—C15—C16 | 121.42 (11) | C42—C43—C44 | 118.86 (12) |
C14—C15—H15 | 119.3 | C42—C43—H43 | 120.6 |
C16—C15—H15 | 119.3 | C44—C43—H43 | 120.6 |
C15—C16—C11 | 119.80 (10) | O3—C44—C43 | 124.85 (12) |
C15—C16—C31 | 117.84 (10) | O3—C44—C45 | 115.07 (11) |
C11—C16—C31 | 122.33 (10) | C43—C44—C45 | 120.07 (11) |
C26—C21—C22 | 118.11 (11) | C46—C45—C44 | 120.31 (11) |
C26—C21—C14 | 120.76 (11) | C46—C45—H45 | 119.8 |
C22—C21—C14 | 121.10 (11) | C44—C45—H45 | 119.8 |
C23—C22—C21 | 120.97 (13) | C45—C46—C41 | 120.98 (12) |
C23—C22—H22 | 119.5 | C45—C46—H46 | 119.5 |
C21—C22—H22 | 119.5 | C41—C46—H46 | 119.5 |
C24—C23—C22 | 118.62 (13) | ||
O1—C1—C2—C3 | −169.93 (13) | C23—C24—C25—C26 | 1.5 (2) |
C11—C1—C2—C3 | 9.58 (19) | F1—C24—C25—C26 | −179.01 (14) |
C1—C2—C3—C41 | 175.54 (11) | C24—C25—C26—C21 | −1.9 (2) |
O1—C1—C11—C16 | 68.39 (16) | C22—C21—C26—C25 | 0.6 (2) |
C2—C1—C11—C16 | −111.12 (13) | C14—C21—C26—C25 | 178.59 (13) |
O1—C1—C11—C12 | −104.98 (14) | C15—C16—C31—C36 | −113.39 (15) |
C2—C1—C11—C12 | 75.50 (15) | C11—C16—C31—C36 | 64.74 (18) |
C4—O2—C12—C13 | −0.32 (18) | C15—C16—C31—C32 | 61.56 (18) |
C4—O2—C12—C11 | 178.25 (12) | C11—C16—C31—C32 | −120.31 (15) |
C16—C11—C12—O2 | −177.27 (11) | C36—C31—C32—C33 | −1.6 (3) |
C1—C11—C12—O2 | −3.68 (16) | C16—C31—C32—C33 | −176.68 (16) |
C16—C11—C12—C13 | 1.35 (18) | C31—C32—C33—C34 | 0.8 (3) |
C1—C11—C12—C13 | 174.94 (11) | C32—C33—C34—C35 | 1.1 (3) |
O2—C12—C13—C14 | 178.18 (11) | C32—C33—C34—F2 | 179.65 (17) |
C11—C12—C13—C14 | −0.33 (19) | F2—C34—C35—C36 | 179.30 (16) |
C12—C13—C14—C15 | −1.26 (19) | C33—C34—C35—C36 | −2.2 (3) |
C12—C13—C14—C21 | 176.82 (12) | C32—C31—C36—C35 | 0.5 (2) |
C13—C14—C15—C16 | 1.84 (19) | C16—C31—C36—C35 | 175.56 (14) |
C21—C14—C15—C16 | −176.22 (12) | C34—C35—C36—C31 | 1.3 (3) |
C14—C15—C16—C11 | −0.8 (2) | C2—C3—C41—C42 | 178.76 (13) |
C14—C15—C16—C31 | 177.35 (12) | C2—C3—C41—C46 | −1.5 (2) |
C12—C11—C16—C15 | −0.77 (18) | C46—C41—C42—C43 | −0.25 (19) |
C1—C11—C16—C15 | −174.17 (11) | C3—C41—C42—C43 | 179.53 (12) |
C12—C11—C16—C31 | −178.86 (11) | C41—C42—C43—C44 | −0.3 (2) |
C1—C11—C16—C31 | 7.74 (18) | C5—O3—C44—C43 | 6.38 (19) |
C15—C14—C21—C26 | 25.55 (19) | C5—O3—C44—C45 | −172.91 (12) |
C13—C14—C21—C26 | −152.49 (13) | C42—C43—C44—O3 | −178.15 (12) |
C15—C14—C21—C22 | −156.51 (13) | C42—C43—C44—C45 | 1.12 (19) |
C13—C14—C21—C22 | 25.45 (19) | O3—C44—C45—C46 | 177.93 (11) |
C26—C21—C22—C23 | 1.2 (2) | C43—C44—C45—C46 | −1.40 (19) |
C14—C21—C22—C23 | −176.78 (14) | C44—C45—C46—C41 | 0.84 (18) |
C21—C22—C23—C24 | −1.6 (2) | C42—C41—C46—C45 | −0.02 (18) |
C22—C23—C24—F1 | −179.25 (14) | C3—C41—C46—C45 | −179.79 (11) |
C22—C23—C24—C25 | 0.3 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
C3—H3···F1i | 0.95 | 2.51 | 3.4159 (15) | 159 |
C5—H5B···O1ii | 0.98 | 2.54 | 3.3534 (18) | 141 |
C22—H22···O1iii | 0.95 | 2.51 | 3.4208 (18) | 161 |
Symmetry codes: (i) −x+2, −y, −z+1; (ii) −x+1, y−1/2, −z+3/2; (iii) x, −y+1/2, z−1/2. |
Experimental details
Crystal data | |
Chemical formula | C29H22F2O3 |
Mr | 456.47 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 200 |
a, b, c (Å) | 9.6059 (2), 19.2236 (5), 13.3772 (3) |
β (°) | 112.905 (1) |
V (Å3) | 2275.46 (9) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.10 |
Crystal size (mm) | 0.54 × 0.51 × 0.51 |
Data collection | |
Diffractometer | Bruker APEXII CCD |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 20209, 5655, 4754 |
Rint | 0.032 |
(sin θ/λ)max (Å−1) | 0.667 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.045, 0.125, 1.03 |
No. of reflections | 5655 |
No. of parameters | 309 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.37, −0.28 |
Computer programs: APEX2 (Bruker, 2010), SAINT (Bruker, 2010), SHELXS97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997) and Mercury (Macrae et al., 2008), SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
C3—H3···F1i | 0.95 | 2.51 | 3.4159 (15) | 159.3 |
C5—H5B···O1ii | 0.98 | 2.54 | 3.3534 (18) | 140.9 |
C22—H22···O1iii | 0.95 | 2.51 | 3.4208 (18) | 160.6 |
Symmetry codes: (i) −x+2, −y, −z+1; (ii) −x+1, y−1/2, −z+3/2; (iii) x, −y+1/2, z−1/2. |
Acknowledgements
BN thanks the UGC for financial assistance under SAP and BSR one-time grants for the purchase of chemicals. SS thanks Mangalore University for research facilities.
References
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
Chalcones constitute an important family of substances belonging to flavonoids, a large group of natural and synthetic products with interesting physicochemical properties, biological activity and structural characteristics. They have been reported to possess many interesting pharmacological activities (Dhar, 1981) including anti-inflammatory, antimicrobial, antifungal, antioxidant, cytotoxic, antitumor and anticancer activities (Dimmock et al., 1999; Satyanarayana et al., 2004). In recent years, it has been reported that some terphenyls exhibit considerable biological activities (e.g. being potent anticoagulants, immunosuppressants, antithrombotics, neuroprotectives, specific 5-lipoxygenase inhibitors) and showing cytotoxic activities (Liu, 2006). In view of the pharmacological importance of terphenyls and chalcones, and in continuation of our work on synthesis of various derivatives of 4,4'-difluoro chalcone (Samshuddin et al., 2011, Fun et al., 2010, Jasinski et al., 2010, Baktır et al., 2011), the molecular and crystal structure of the title compound is reported.
The C=C function along the Michael system is (E)-configured. The least-squares planes defined by the respective carbon atoms of the individual para-fluorophenyl moieties enclose angles of 25.42 (5) ° and 64.01 (5) ° with the plane defined by the carbon atoms of the terphenyl's central phenyl ring.
In the crystal, C–H···O as well as C–H···F contacts can be observed whose range falls by more than 0.1 Å below the sum of van-der-Waals radii of the respective atoms. The C–H···O contacts stem from one of the hydrogen atoms of a para-fluoro phenyl moiety and one of the methoxy groups and invariably apply the ketonic oxygen atom as acceptor. The C–H···F contacts are exclusively supported by the vinylic hydrogen atom on the Michael system. In terms of graph-set analysis (Etter et al., 1990; Bernstein et al., 1995), the descriptor for the C–H···F contacts is R22(26) on the unitary level while the C–H···O contacts necessitate a C11(9)C11(10) descriptor on the same level. In total, the molecules are connected to planes parallel (1 0 1). The shortest intercentroid distance between two ring centroids was found at 3.7169 (7) Å and is apparent between the methoxyphenyl moiety connected to the Michael system and its symmetry-generated equivalents. Details about metrical parameters of the C–H···O and C–H···F contacts as well as information about their symmetry can be found in Table 1 (Fig. 2).