organic compounds
(2E)-1-(4,4′′-Difluoro-5′-methoxy-1,1′:3′,1′′-terphenyl-4′-yl)-3-(4-fluorophenyl)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 cP.A. College of Engineering, Department of Chemistry, Nadupadavu, Mangalore 574 199, India
*Correspondence e-mail: richard.betz@webmail.co.za
In the title compound, C28H19F3O2, the C=C double bond has an E configuration. In the crystal, C—H⋯F contacts link the molecules into chains along [111]. The shortest centroid–centroid distance between two π systems is 3.8087 (8) Å and is apparent between the para-fluorophenyl group attached to the Michael system 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 work on the synthesis and strcutures of different chalcone derivatives, see: Samshuddin et al. (2011a,b); Fun et al. (2010a,b); Jasinski et al. (2010a,b); Baktir et al. (2011a,b). 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
10.1107/S1600536811042279/zl2413sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536811042279/zl2413Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536811042279/zl2413Isup3.cdx
Supporting information file. DOI: 10.1107/S1600536811042279/zl2413Isup4.cml
To a mixture of 1-(4,4''-difluoro-5'-methoxy-1,1':3',1''-terphenyl-4'-yl) ethanone (0.338 g, 0.001 mol) and p-fluorobenzaldehyde (0.124 g, 0.001 mol) in 30 ml e thanol, 1 ml of 10% sodium hydroxide solution was added and stirred at 278–283 K for 3 h. The precipitate formed was collected by filtration and purified by recrystallization from ethanol (yield: 83%). Single crystals suitable for the X-ray diffraction study were grown from a 1:1 (v:v) mixture of DMF and ethanol by slow evaporation at room temperature.
Carbon-bound H atoms were placed in calculated positions (C—H 0.95 Å for aromatic and vinylic carbon atoms, C—H 0.99 Å for methylene groups) 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).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).C28H19F3O2 | F(000) = 920 |
Mr = 444.43 | Dx = 1.402 Mg m−3 |
Monoclinic, P21/c | Melting point: 549 K |
Hall symbol: -P 2ybc | Mo Kα radiation, λ = 0.71073 Å |
a = 22.5742 (5) Å | Cell parameters from 9830 reflections |
b = 6.8101 (1) Å | θ = 3.0–28.3° |
c = 13.8475 (3) Å | µ = 0.11 mm−1 |
β = 98.405 (1)° | T = 200 K |
V = 2105.95 (7) Å3 | Block, yellow |
Z = 4 | 0.56 × 0.26 × 0.18 mm |
Bruker APEXII CCD diffractometer | 4087 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.032 |
Graphite monochromator | θmax = 28.3°, θmin = 1.8° |
ϕ and ω scans | h = −30→30 |
35196 measured reflections | k = −9→8 |
5218 independent reflections | l = −18→18 |
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)] = 0.038 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.102 | H-atom parameters constrained |
S = 1.04 | w = 1/[σ2(Fo2) + (0.0462P)2 + 0.5814P] where P = (Fo2 + 2Fc2)/3 |
5218 reflections | (Δ/σ)max < 0.001 |
299 parameters | Δρmax = 0.30 e Å−3 |
0 restraints | Δρmin = −0.19 e Å−3 |
C28H19F3O2 | V = 2105.95 (7) Å3 |
Mr = 444.43 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 22.5742 (5) Å | µ = 0.11 mm−1 |
b = 6.8101 (1) Å | T = 200 K |
c = 13.8475 (3) Å | 0.56 × 0.26 × 0.18 mm |
β = 98.405 (1)° |
Bruker APEXII CCD diffractometer | 4087 reflections with I > 2σ(I) |
35196 measured reflections | Rint = 0.032 |
5218 independent reflections |
R[F2 > 2σ(F2)] = 0.038 | 0 restraints |
wR(F2) = 0.102 | H-atom parameters constrained |
S = 1.04 | Δρmax = 0.30 e Å−3 |
5218 reflections | Δρmin = −0.19 e Å−3 |
299 parameters |
x | y | z | Uiso*/Ueq | ||
F1 | −0.04953 (4) | 0.88945 (14) | 0.40789 (7) | 0.0567 (3) | |
F2 | 0.37032 (4) | 0.00783 (12) | 0.22814 (6) | 0.0486 (2) | |
F3 | 0.53866 (4) | 1.35725 (17) | −0.11810 (8) | 0.0755 (3) | |
O1 | 0.25624 (4) | 0.57595 (14) | −0.06967 (7) | 0.0445 (2) | |
O2 | 0.18161 (4) | 1.02710 (14) | −0.05061 (7) | 0.0422 (2) | |
C1 | 0.25957 (5) | 0.72789 (19) | −0.02279 (8) | 0.0317 (3) | |
C2 | 0.30451 (6) | 0.88085 (19) | −0.03214 (9) | 0.0343 (3) | |
H2 | 0.3015 | 1.0037 | −0.0007 | 0.041* | |
C3 | 0.34907 (5) | 0.85151 (19) | −0.08335 (9) | 0.0342 (3) | |
H3 | 0.3493 | 0.7298 | −0.1168 | 0.041* | |
C4 | 0.15353 (7) | 1.2144 (2) | −0.06059 (10) | 0.0455 (3) | |
H4A | 0.1662 | 1.2924 | −0.0017 | 0.068* | |
H4B | 0.1100 | 1.1977 | −0.0695 | 0.068* | |
H4C | 0.1651 | 1.2821 | −0.1175 | 0.068* | |
C11 | 0.21736 (5) | 0.76519 (17) | 0.05006 (8) | 0.0291 (2) | |
C12 | 0.17663 (5) | 0.92003 (18) | 0.03161 (9) | 0.0313 (3) | |
C13 | 0.13322 (5) | 0.95422 (18) | 0.09070 (9) | 0.0310 (3) | |
H13 | 0.1050 | 1.0572 | 0.0756 | 0.037* | |
C14 | 0.13129 (5) | 0.83612 (17) | 0.17253 (8) | 0.0285 (2) | |
C15 | 0.17348 (5) | 0.68782 (17) | 0.19389 (8) | 0.0287 (2) | |
H15 | 0.1733 | 0.6120 | 0.2514 | 0.034* | |
C16 | 0.21618 (5) | 0.64726 (17) | 0.13284 (8) | 0.0279 (2) | |
C21 | 0.08371 (5) | 0.86298 (16) | 0.23502 (9) | 0.0289 (2) | |
C22 | 0.02421 (5) | 0.89054 (18) | 0.19403 (9) | 0.0331 (3) | |
H22 | 0.0143 | 0.9020 | 0.1252 | 0.040* | |
C23 | −0.02064 (6) | 0.90140 (18) | 0.25208 (10) | 0.0375 (3) | |
H23 | −0.0612 | 0.9206 | 0.2240 | 0.045* | |
C24 | −0.00510 (6) | 0.88379 (18) | 0.35085 (10) | 0.0384 (3) | |
C25 | 0.05286 (6) | 0.8598 (2) | 0.39518 (10) | 0.0398 (3) | |
H25 | 0.0622 | 0.8508 | 0.4642 | 0.048* | |
C26 | 0.09725 (6) | 0.84925 (18) | 0.33614 (9) | 0.0345 (3) | |
H26 | 0.1377 | 0.8323 | 0.3652 | 0.041* | |
C31 | 0.25833 (5) | 0.48112 (17) | 0.15868 (8) | 0.0274 (2) | |
C32 | 0.23728 (5) | 0.30657 (18) | 0.19374 (9) | 0.0312 (3) | |
H32 | 0.1962 | 0.2967 | 0.2010 | 0.037* | |
C33 | 0.27442 (6) | 0.14721 (18) | 0.21833 (9) | 0.0343 (3) | |
H33 | 0.2596 | 0.0294 | 0.2426 | 0.041* | |
C34 | 0.33354 (6) | 0.16525 (18) | 0.20640 (9) | 0.0333 (3) | |
C35 | 0.35695 (5) | 0.3347 (2) | 0.17383 (9) | 0.0352 (3) | |
H35 | 0.3982 | 0.3430 | 0.1673 | 0.042* | |
C36 | 0.31926 (5) | 0.49307 (18) | 0.15071 (9) | 0.0322 (3) | |
H36 | 0.3350 | 0.6119 | 0.1290 | 0.039* | |
C41 | 0.39775 (5) | 0.9881 (2) | −0.09336 (9) | 0.0340 (3) | |
C42 | 0.44727 (6) | 0.9221 (2) | −0.13332 (10) | 0.0425 (3) | |
H42 | 0.4484 | 0.7899 | −0.1550 | 0.051* | |
C43 | 0.49492 (6) | 1.0455 (3) | −0.14204 (11) | 0.0504 (4) | |
H43 | 0.5288 | 0.9998 | −0.1690 | 0.060* | |
C44 | 0.49179 (6) | 1.2347 (3) | −0.11076 (11) | 0.0498 (4) | |
C45 | 0.44382 (7) | 1.3083 (2) | −0.07209 (10) | 0.0473 (3) | |
H45 | 0.4431 | 1.4414 | −0.0516 | 0.057* | |
C46 | 0.39656 (6) | 1.1840 (2) | −0.06367 (9) | 0.0394 (3) | |
H46 | 0.3628 | 1.2322 | −0.0374 | 0.047* |
U11 | U22 | U33 | U12 | U13 | U23 | |
F1 | 0.0539 (5) | 0.0573 (6) | 0.0682 (6) | −0.0014 (4) | 0.0407 (4) | −0.0098 (4) |
F2 | 0.0448 (5) | 0.0415 (5) | 0.0603 (5) | 0.0126 (4) | 0.0102 (4) | 0.0063 (4) |
F3 | 0.0552 (6) | 0.0899 (8) | 0.0845 (7) | −0.0380 (5) | 0.0209 (5) | 0.0072 (6) |
O1 | 0.0498 (6) | 0.0425 (5) | 0.0458 (5) | −0.0121 (4) | 0.0220 (4) | −0.0141 (4) |
O2 | 0.0514 (6) | 0.0377 (5) | 0.0416 (5) | 0.0052 (4) | 0.0203 (4) | 0.0118 (4) |
C1 | 0.0316 (6) | 0.0353 (6) | 0.0295 (6) | −0.0033 (5) | 0.0092 (5) | −0.0003 (5) |
C2 | 0.0372 (6) | 0.0345 (6) | 0.0334 (6) | −0.0059 (5) | 0.0125 (5) | −0.0022 (5) |
C3 | 0.0348 (6) | 0.0366 (7) | 0.0327 (6) | −0.0028 (5) | 0.0096 (5) | 0.0012 (5) |
C4 | 0.0596 (9) | 0.0370 (7) | 0.0394 (7) | 0.0012 (6) | 0.0055 (6) | 0.0090 (6) |
C11 | 0.0291 (6) | 0.0289 (6) | 0.0308 (6) | −0.0061 (4) | 0.0092 (4) | −0.0028 (5) |
C12 | 0.0347 (6) | 0.0288 (6) | 0.0317 (6) | −0.0053 (5) | 0.0093 (5) | 0.0011 (5) |
C13 | 0.0309 (6) | 0.0272 (6) | 0.0359 (6) | −0.0006 (5) | 0.0080 (5) | −0.0006 (5) |
C14 | 0.0283 (6) | 0.0271 (6) | 0.0313 (6) | −0.0057 (4) | 0.0085 (4) | −0.0040 (4) |
C15 | 0.0298 (6) | 0.0285 (6) | 0.0295 (5) | −0.0044 (5) | 0.0094 (4) | −0.0002 (5) |
C16 | 0.0275 (5) | 0.0268 (6) | 0.0305 (6) | −0.0056 (4) | 0.0075 (4) | −0.0033 (4) |
C21 | 0.0305 (6) | 0.0228 (5) | 0.0351 (6) | −0.0024 (4) | 0.0113 (5) | −0.0027 (5) |
C22 | 0.0349 (6) | 0.0289 (6) | 0.0367 (6) | 0.0008 (5) | 0.0090 (5) | −0.0008 (5) |
C23 | 0.0310 (6) | 0.0302 (6) | 0.0534 (8) | 0.0008 (5) | 0.0129 (6) | −0.0041 (6) |
C24 | 0.0425 (7) | 0.0290 (6) | 0.0498 (8) | −0.0018 (5) | 0.0273 (6) | −0.0070 (5) |
C25 | 0.0493 (8) | 0.0382 (7) | 0.0348 (6) | 0.0004 (6) | 0.0163 (6) | −0.0049 (5) |
C26 | 0.0351 (6) | 0.0342 (6) | 0.0355 (6) | −0.0002 (5) | 0.0090 (5) | −0.0046 (5) |
C31 | 0.0286 (6) | 0.0287 (6) | 0.0260 (5) | −0.0036 (4) | 0.0082 (4) | −0.0045 (4) |
C32 | 0.0295 (6) | 0.0325 (6) | 0.0335 (6) | −0.0035 (5) | 0.0109 (5) | −0.0020 (5) |
C33 | 0.0387 (7) | 0.0291 (6) | 0.0365 (6) | −0.0036 (5) | 0.0102 (5) | 0.0008 (5) |
C34 | 0.0357 (6) | 0.0325 (6) | 0.0318 (6) | 0.0048 (5) | 0.0055 (5) | −0.0028 (5) |
C35 | 0.0270 (6) | 0.0419 (7) | 0.0376 (6) | −0.0010 (5) | 0.0083 (5) | −0.0023 (5) |
C36 | 0.0300 (6) | 0.0329 (6) | 0.0349 (6) | −0.0057 (5) | 0.0090 (5) | −0.0005 (5) |
C41 | 0.0303 (6) | 0.0427 (7) | 0.0301 (6) | −0.0032 (5) | 0.0081 (5) | 0.0049 (5) |
C42 | 0.0388 (7) | 0.0474 (8) | 0.0442 (7) | 0.0004 (6) | 0.0156 (6) | 0.0041 (6) |
C43 | 0.0335 (7) | 0.0685 (10) | 0.0521 (8) | −0.0030 (7) | 0.0164 (6) | 0.0089 (8) |
C44 | 0.0392 (7) | 0.0645 (10) | 0.0459 (8) | −0.0186 (7) | 0.0070 (6) | 0.0121 (7) |
C45 | 0.0503 (8) | 0.0474 (8) | 0.0445 (8) | −0.0137 (7) | 0.0075 (6) | 0.0031 (6) |
C46 | 0.0383 (7) | 0.0447 (7) | 0.0367 (7) | −0.0048 (6) | 0.0106 (5) | 0.0014 (6) |
F1—C24 | 1.3648 (14) | C22—H22 | 0.9500 |
F2—C34 | 1.3624 (14) | C23—C24 | 1.367 (2) |
F3—C44 | 1.3628 (16) | C23—H23 | 0.9500 |
O1—C1 | 1.2180 (15) | C24—C25 | 1.371 (2) |
O2—C12 | 1.3704 (14) | C25—C26 | 1.3847 (17) |
O2—C4 | 1.4218 (17) | C25—H25 | 0.9500 |
C1—C2 | 1.4729 (17) | C26—H26 | 0.9500 |
C1—C11 | 1.5070 (16) | C31—C32 | 1.3936 (16) |
C2—C3 | 1.3278 (17) | C31—C36 | 1.3981 (16) |
C2—H2 | 0.9500 | C32—C33 | 1.3832 (17) |
C3—C41 | 1.4617 (17) | C32—H32 | 0.9500 |
C3—H3 | 0.9500 | C33—C34 | 1.3741 (18) |
C4—H4A | 0.9800 | C33—H33 | 0.9500 |
C4—H4B | 0.9800 | C34—C35 | 1.3728 (18) |
C4—H4C | 0.9800 | C35—C36 | 1.3818 (18) |
C11—C12 | 1.3979 (17) | C35—H35 | 0.9500 |
C11—C16 | 1.4030 (16) | C36—H36 | 0.9500 |
C12—C13 | 1.3849 (17) | C41—C42 | 1.3925 (18) |
C13—C14 | 1.3954 (17) | C41—C46 | 1.3974 (19) |
C13—H13 | 0.9500 | C42—C43 | 1.384 (2) |
C14—C15 | 1.3900 (16) | C42—H42 | 0.9500 |
C14—C21 | 1.4859 (15) | C43—C44 | 1.365 (2) |
C15—C16 | 1.3995 (16) | C43—H43 | 0.9500 |
C15—H15 | 0.9500 | C44—C45 | 1.371 (2) |
C16—C31 | 1.4880 (16) | C45—C46 | 1.3802 (19) |
C21—C26 | 1.3920 (17) | C45—H45 | 0.9500 |
C21—C22 | 1.3923 (17) | C46—H46 | 0.9500 |
C22—C23 | 1.3836 (18) | ||
C12—O2—C4 | 117.93 (10) | F1—C24—C25 | 118.55 (12) |
O1—C1—C2 | 122.93 (11) | C23—C24—C25 | 123.16 (12) |
O1—C1—C11 | 120.28 (11) | C24—C25—C26 | 117.86 (12) |
C2—C1—C11 | 116.78 (10) | C24—C25—H25 | 121.1 |
C3—C2—C1 | 121.72 (12) | C26—C25—H25 | 121.1 |
C3—C2—H2 | 119.1 | C25—C26—C21 | 121.26 (12) |
C1—C2—H2 | 119.1 | C25—C26—H26 | 119.4 |
C2—C3—C41 | 126.41 (12) | C21—C26—H26 | 119.4 |
C2—C3—H3 | 116.8 | C32—C31—C36 | 117.82 (11) |
C41—C3—H3 | 116.8 | C32—C31—C16 | 119.58 (10) |
O2—C4—H4A | 109.5 | C36—C31—C16 | 122.59 (10) |
O2—C4—H4B | 109.5 | C33—C32—C31 | 121.98 (11) |
H4A—C4—H4B | 109.5 | C33—C32—H32 | 119.0 |
O2—C4—H4C | 109.5 | C31—C32—H32 | 119.0 |
H4A—C4—H4C | 109.5 | C34—C33—C32 | 117.69 (11) |
H4B—C4—H4C | 109.5 | C34—C33—H33 | 121.2 |
C12—C11—C16 | 119.38 (10) | C32—C33—H33 | 121.2 |
C12—C11—C1 | 117.91 (10) | F2—C34—C35 | 118.87 (11) |
C16—C11—C1 | 122.67 (11) | F2—C34—C33 | 118.31 (11) |
O2—C12—C13 | 123.54 (11) | C35—C34—C33 | 122.81 (12) |
O2—C12—C11 | 114.93 (10) | C34—C35—C36 | 118.60 (11) |
C13—C12—C11 | 121.48 (11) | C34—C35—H35 | 120.7 |
C12—C13—C14 | 119.45 (11) | C36—C35—H35 | 120.7 |
C12—C13—H13 | 120.3 | C35—C36—C31 | 121.05 (11) |
C14—C13—H13 | 120.3 | C35—C36—H36 | 119.5 |
C15—C14—C13 | 119.33 (10) | C31—C36—H36 | 119.5 |
C15—C14—C21 | 119.78 (10) | C42—C41—C46 | 118.44 (12) |
C13—C14—C21 | 120.87 (11) | C42—C41—C3 | 119.38 (12) |
C14—C15—C16 | 121.73 (11) | C46—C41—C3 | 122.19 (12) |
C14—C15—H15 | 119.1 | C43—C42—C41 | 121.19 (14) |
C16—C15—H15 | 119.1 | C43—C42—H42 | 119.4 |
C15—C16—C11 | 118.53 (11) | C41—C42—H42 | 119.4 |
C15—C16—C31 | 118.53 (10) | C44—C43—C42 | 117.95 (14) |
C11—C16—C31 | 122.95 (10) | C44—C43—H43 | 121.0 |
C26—C21—C22 | 118.43 (11) | C42—C43—H43 | 121.0 |
C26—C21—C14 | 120.42 (11) | F3—C44—C43 | 118.54 (14) |
C22—C21—C14 | 121.03 (11) | F3—C44—C45 | 118.12 (15) |
C23—C22—C21 | 120.96 (12) | C43—C44—C45 | 123.35 (13) |
C23—C22—H22 | 119.5 | C44—C45—C46 | 118.22 (15) |
C21—C22—H22 | 119.5 | C44—C45—H45 | 120.9 |
C24—C23—C22 | 118.31 (12) | C46—C45—H45 | 120.9 |
C24—C23—H23 | 120.8 | C45—C46—C41 | 120.84 (13) |
C22—C23—H23 | 120.8 | C45—C46—H46 | 119.6 |
F1—C24—C23 | 118.29 (12) | C41—C46—H46 | 119.6 |
O1—C1—C2—C3 | −8.7 (2) | C22—C23—C24—C25 | 1.34 (19) |
C11—C1—C2—C3 | 170.25 (12) | F1—C24—C25—C26 | 178.35 (11) |
C1—C2—C3—C41 | −176.55 (12) | C23—C24—C25—C26 | −1.3 (2) |
O1—C1—C11—C12 | −114.77 (14) | C24—C25—C26—C21 | 0.17 (19) |
C2—C1—C11—C12 | 66.28 (15) | C22—C21—C26—C25 | 0.88 (18) |
O1—C1—C11—C16 | 62.99 (16) | C14—C21—C26—C25 | −175.32 (11) |
C2—C1—C11—C16 | −115.96 (13) | C15—C16—C31—C32 | 40.84 (15) |
C4—O2—C12—C13 | 19.08 (18) | C11—C16—C31—C32 | −139.22 (12) |
C4—O2—C12—C11 | −163.68 (11) | C15—C16—C31—C36 | −138.15 (12) |
C16—C11—C12—O2 | 179.64 (10) | C11—C16—C31—C36 | 41.80 (17) |
C1—C11—C12—O2 | −2.53 (15) | C36—C31—C32—C33 | −1.33 (17) |
C16—C11—C12—C13 | −3.06 (17) | C16—C31—C32—C33 | 179.63 (11) |
C1—C11—C12—C13 | 174.78 (11) | C31—C32—C33—C34 | −0.47 (18) |
O2—C12—C13—C14 | 179.37 (11) | C32—C33—C34—F2 | −178.47 (11) |
C11—C12—C13—C14 | 2.30 (18) | C32—C33—C34—C35 | 1.67 (19) |
C12—C13—C14—C15 | 0.79 (17) | F2—C34—C35—C36 | 179.18 (11) |
C12—C13—C14—C21 | −177.28 (11) | C33—C34—C35—C36 | −0.96 (19) |
C13—C14—C15—C16 | −3.16 (17) | C34—C35—C36—C31 | −0.97 (18) |
C21—C14—C15—C16 | 174.93 (10) | C32—C31—C36—C35 | 2.07 (17) |
C14—C15—C16—C11 | 2.39 (17) | C16—C31—C36—C35 | −178.93 (11) |
C14—C15—C16—C31 | −177.66 (10) | C2—C3—C41—C42 | 167.43 (13) |
C12—C11—C16—C15 | 0.71 (16) | C2—C3—C41—C46 | −12.3 (2) |
C1—C11—C16—C15 | −177.02 (10) | C46—C41—C42—C43 | 1.2 (2) |
C12—C11—C16—C31 | −179.24 (10) | C3—C41—C42—C43 | −178.53 (13) |
C1—C11—C16—C31 | 3.03 (17) | C41—C42—C43—C44 | −0.4 (2) |
C15—C14—C21—C26 | 41.88 (16) | C42—C43—C44—F3 | 179.40 (13) |
C13—C14—C21—C26 | −140.05 (12) | C42—C43—C44—C45 | −0.5 (2) |
C15—C14—C21—C22 | −134.22 (12) | F3—C44—C45—C46 | −179.36 (13) |
C13—C14—C21—C22 | 43.84 (16) | C43—C44—C45—C46 | 0.6 (2) |
C26—C21—C22—C23 | −0.87 (18) | C44—C45—C46—C41 | 0.3 (2) |
C14—C21—C22—C23 | 175.31 (11) | C42—C41—C46—C45 | −1.16 (19) |
C21—C22—C23—C24 | −0.20 (18) | C3—C41—C46—C45 | 178.57 (12) |
C22—C23—C24—F1 | −178.34 (11) |
D—H···A | D—H | H···A | D···A | D—H···A |
C25—H25···F1i | 0.95 | 2.55 | 3.2276 (15) | 129 |
C43—H43···F2ii | 0.95 | 2.53 | 3.4449 (16) | 161 |
Symmetry codes: (i) −x, −y+2, −z+1; (ii) −x+1, −y+1, −z. |
Experimental details
Crystal data | |
Chemical formula | C28H19F3O2 |
Mr | 444.43 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 200 |
a, b, c (Å) | 22.5742 (5), 6.8101 (1), 13.8475 (3) |
β (°) | 98.405 (1) |
V (Å3) | 2105.95 (7) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.11 |
Crystal size (mm) | 0.56 × 0.26 × 0.18 |
Data collection | |
Diffractometer | Bruker APEXII CCD diffractometer |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 35196, 5218, 4087 |
Rint | 0.032 |
(sin θ/λ)max (Å−1) | 0.667 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.038, 0.102, 1.04 |
No. of reflections | 5218 |
No. of parameters | 299 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.30, −0.19 |
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 |
C25—H25···F1i | 0.95 | 2.55 | 3.2276 (15) | 128.5 |
C43—H43···F2ii | 0.95 | 2.53 | 3.4449 (16) | 161.3 |
Symmetry codes: (i) −x, −y+2, −z+1; (ii) −x+1, −y+1, −z. |
Acknowledgements
BN thanks the UGC for financial assistance through the SAP and BSR for 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., 2011a/b, Fun et al., 2010a/b, Jasinski et al., 2010a/b, Baktir et al., 2011a/b), the molecular and crystal structure of the title compound is reported.
The C=C double of the Michael system is (E)-configured. The least-squares planes defined by the carbon atoms of the para-fluoro phenyl rings of the terphenyl moiety and its central phenyl ring enclose angles of 40.37 (6)° and 44.04 (6)°, respectively (Fig. 1).
In the crystal, two different C–H···F contacts whose range falls by more than 0.1 Å below the sum of van-der-Waals radii of the atoms participating are observed. The first contact is apparent between one of the fluorine atoms on the terphenyl skeleton and a hydrogen atom on the terminal aromatic substituent on the Michael system's substituent. The second one is supported by the second fluorine atom on the terphenyl skeleton and a hydrogen atom on its symmetry-generated equivalent. Both contacts connect the molecules in such a way that cyclic patterns with local inversion symmetry are generated. In terms of graph-set analysis (Etter et al., 1990; Bernstein et al., 1995), the descriptor for the C–H···F contacts is R22(8)R22(28) on the unitary level. In total, the molecules are connected to infinite chains along [1 1 1]. Metrical parameters as well as information about the symmetry of these contacts is summarized in Table 1. The shortest intercentroid distance between two π systems was found at 3.8087 (8) Å and is apparent between the para-fluoro phenyl moiety attached to the Michael system and its symmetry-generated equivalent. (Fig. 2).
The packing of the title compound in the crystal is shown in Figure 3.