organic compounds
(2E)-1-(4-Bromophenyl)-3-[3-(4-methoxyphenyl)-1-phenyl-1H-pyrazol-4-yl]prop-2-en-1-one
aDepartment of Chemistry, BITS, Pilani - K. K. Birla Goa Campus, Goa 403 726, India, bDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia, and cChemistry Department, Faculty of Science, King Abdulaziz University, PO Box 80203 Jeddah, Saudi Arabia
*Correspondence e-mail: edward.tiekink@gmail.com
The pyrazole ring in the title compound, C25H19BrN2O2, is almost planar (r.m.s. deviation = 0.003 Å) and forms dihedral angles of 7.56 (13) and 56.48 (13)° with the N- and C-bound benzene rings, respectively. The prop-2-en-1-one residue has an E conformation about the C=C double bond [1.328 (4) Å] and is almost coplanar with the pyrazole ring [C—C—C—C torsion angle = −174.4 (3)°]. A twist between the prop-2-en-1-one unit and the terminal benzene ring is evident [C—C—C—C torsion angle = −15.4 (4)°]. In the crystal, molecules are consolidated into a three-dimensional architecture by C—H⋯O, C—H⋯π and π–π [centroid–centroid separation = 3.7597 (16) Å] interactions.
Related literature
For background details and biological applications of pyrazole and et al. (2009); Prasath & Bhavana (2012); Prasath et al. (2013). For the structure of the 4-methoxyphenyl pyrazole compound, see: Fun et al. (2011).
see: BabasahebExperimental
Crystal data
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Data collection: CrysAlis PRO (Agilent, 2013); cell CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012) and DIAMOND (Brandenburg, 2006); software used to prepare material for publication: publCIF (Westrip, 2010).
Supporting information
https://doi.org/10.1107/S1600536813016838/hb7095sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536813016838/hb7095Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536813016838/hb7095Isup3.cml
A mixture of 3-(4-methoxyphenyl)-1-phenyl-1H-pyrazole-4-carbaldehyde (1.4 g, 0.005 M), 4-bromo acetophenone (1 g, 0.005 M) and KOH (0.5 g) in distilled ethanol (50 ml) was stirred for 12 h at room temperature. The resulting mixture was neutralized with dilute acetic acid. The resultant solid was filtered, dried and purified by
using 1:2 mixture of ethyl acetate and hexane. Re-crystallization was by slow evaporation of an acetone solution of (I) which yielded yellow needles. M.pt. 433–435 K. Yield: 80%.The C-bound H atoms were geometrically placed (C—H = 0.95–0.98 Å) and refined as riding with Uiso(H) = 1.2–1.5Ueq(C).
In addition to their being valuable intermediates in organic synthesis (Prasath & Bhavana, 2012), nitrogen-containing heterocyclic analogues, such as pyrazole
exhibit a variety of biological activities, e.g. anti-plasmodial, anti-microbial and anti-cancer activities (Prasath et al., 2013; Babasaheb et al., 2009). It was in this context that the title compound, (I), was investigated.The molecular structure of (I), Fig. 1, comprises a planar (r.m.s. deviation = 0.003 Å) tri-substituted pyrazoyl ring. The N1- and C12-bound benzene rings form dihedral angles of 7.56 (13) and 56.48 (13)°, respectively, with the five-membered ring, and 60.88 (12)° with each other. The prop-2-en-1-one residue has an E-configuration about the C8═C9 double bond [1.328 (4) Å], and is also co-planar with the five-membered ring as seen in the value of the C8—C9—C10—C11 torsion angle of -174.4 (3)°. This planarity does not extend to the terminal benzene ring as there is a twist manifested in the C2—C1—C7—C8 torsion angle of -15.4 (4)°. The observed conformation for (I) resembles closely that reported recently for the unsubstituted parent compound (Fun et al., 2011).
In the crystal packing, centrosymmetrically related molecules are connected via C—H···O interactions, Table 1, and these are connected into a three-dimensional architecture by π—π [between centrosymmetrically related bromobenzene rings; 3.7597 (16)° for 1 - x, 2 - y, 2 - z] and methyl-C—H···π(methoxybenzene ring) interactions, Fig. 2 and Table 1.
For background details and biological applications of pyrazole and
see: Babasaheb et al. (2009); Prasath & Bhavana (2012); Prasath et al. (2013). For the structure of the 4-methoxyphenyl pyrazole compound, see: Fun et al. (2011).Data collection: CrysAlis PRO (Agilent, 2013); cell
CrysAlis PRO (Agilent, 2013); data reduction: CrysAlis PRO (Agilent, 2013); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012) and DIAMOND (Brandenburg, 2006); software used to prepare material for publication: publCIF (Westrip, 2010).C25H19BrN2O2 | Z = 2 |
Mr = 459.33 | F(000) = 468 |
Triclinic, P1 | Dx = 1.511 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 7.3643 (3) Å | Cell parameters from 2849 reflections |
b = 10.6795 (5) Å | θ = 3.0–27.5° |
c = 13.1038 (6) Å | µ = 2.06 mm−1 |
α = 91.822 (4)° | T = 100 K |
β = 101.311 (4)° | Prism, yellow |
γ = 91.792 (3)° | 0.50 × 0.40 × 0.30 mm |
V = 1009.31 (8) Å3 |
Agilent SuperNova Dual diffractometer with an Atlas detector | 4649 independent reflections |
Radiation source: SuperNova (Mo) X-ray Source | 3875 reflections with I > 2σ(I) |
Mirror monochromator | Rint = 0.038 |
Detector resolution: 10.4041 pixels mm-1 | θmax = 27.6°, θmin = 3.0° |
ω scan | h = −9→9 |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2013) | k = −13→13 |
Tmin = 0.921, Tmax = 1.000 | l = −15→17 |
8736 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)] = 0.043 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.111 | H-atom parameters constrained |
S = 1.04 | w = 1/[σ2(Fo2) + (0.0485P)2 + 0.731P] where P = (Fo2 + 2Fc2)/3 |
4649 reflections | (Δ/σ)max = 0.001 |
271 parameters | Δρmax = 0.47 e Å−3 |
0 restraints | Δρmin = −0.55 e Å−3 |
C25H19BrN2O2 | γ = 91.792 (3)° |
Mr = 459.33 | V = 1009.31 (8) Å3 |
Triclinic, P1 | Z = 2 |
a = 7.3643 (3) Å | Mo Kα radiation |
b = 10.6795 (5) Å | µ = 2.06 mm−1 |
c = 13.1038 (6) Å | T = 100 K |
α = 91.822 (4)° | 0.50 × 0.40 × 0.30 mm |
β = 101.311 (4)° |
Agilent SuperNova Dual diffractometer with an Atlas detector | 4649 independent reflections |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2013) | 3875 reflections with I > 2σ(I) |
Tmin = 0.921, Tmax = 1.000 | Rint = 0.038 |
8736 measured reflections |
R[F2 > 2σ(F2)] = 0.043 | 0 restraints |
wR(F2) = 0.111 | H-atom parameters constrained |
S = 1.04 | Δρmax = 0.47 e Å−3 |
4649 reflections | Δρmin = −0.55 e Å−3 |
271 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 | ||
Br1 | 0.11696 (4) | 1.12761 (3) | 0.86611 (2) | 0.03080 (12) | |
O1 | 0.6500 (3) | 0.61824 (19) | 0.97288 (15) | 0.0248 (4) | |
O2 | 0.6830 (2) | 0.98810 (16) | 0.42732 (14) | 0.0185 (4) | |
N1 | 1.2201 (3) | 0.58644 (19) | 0.65301 (17) | 0.0145 (4) | |
N2 | 1.3006 (3) | 0.51261 (19) | 0.73128 (16) | 0.0137 (4) | |
C1 | 0.5191 (4) | 0.7966 (2) | 0.8896 (2) | 0.0172 (5) | |
C2 | 0.5417 (4) | 0.8979 (3) | 0.8283 (2) | 0.0213 (6) | |
H2 | 0.6396 | 0.8992 | 0.7906 | 0.026* | |
C3 | 0.4235 (4) | 0.9967 (3) | 0.8216 (2) | 0.0227 (6) | |
H3 | 0.4391 | 1.0656 | 0.7796 | 0.027* | |
C4 | 0.2828 (4) | 0.9933 (3) | 0.8769 (2) | 0.0208 (6) | |
C5 | 0.2543 (4) | 0.8941 (3) | 0.9378 (2) | 0.0227 (6) | |
H5 | 0.1551 | 0.8931 | 0.9745 | 0.027* | |
C6 | 0.3751 (4) | 0.7954 (3) | 0.9440 (2) | 0.0205 (6) | |
H6 | 0.3587 | 0.7266 | 0.9859 | 0.025* | |
C7 | 0.6504 (4) | 0.6906 (2) | 0.9023 (2) | 0.0173 (5) | |
C8 | 0.7763 (4) | 0.6782 (2) | 0.8287 (2) | 0.0176 (5) | |
H8 | 0.7483 | 0.7174 | 0.7637 | 0.021* | |
C9 | 0.9287 (4) | 0.6129 (2) | 0.8514 (2) | 0.0164 (5) | |
H9 | 0.9515 | 0.5759 | 0.9174 | 0.020* | |
C10 | 1.0640 (3) | 0.5920 (2) | 0.7864 (2) | 0.0147 (5) | |
C11 | 1.2115 (4) | 0.5143 (2) | 0.8117 (2) | 0.0155 (5) | |
H11 | 1.2439 | 0.4703 | 0.8742 | 0.019* | |
C12 | 1.0770 (3) | 0.6352 (2) | 0.68607 (19) | 0.0130 (5) | |
C13 | 1.4631 (3) | 0.4466 (2) | 0.7208 (2) | 0.0142 (5) | |
C14 | 1.5469 (4) | 0.4699 (2) | 0.6376 (2) | 0.0162 (5) | |
H14 | 1.4993 | 0.5305 | 0.5889 | 0.019* | |
C15 | 1.7022 (4) | 0.4038 (2) | 0.6258 (2) | 0.0172 (5) | |
H15 | 1.7594 | 0.4183 | 0.5681 | 0.021* | |
C16 | 1.7731 (4) | 0.3171 (2) | 0.6979 (2) | 0.0198 (6) | |
H16 | 1.8791 | 0.2722 | 0.6899 | 0.024* | |
C17 | 1.6886 (4) | 0.2960 (3) | 0.7821 (2) | 0.0215 (6) | |
H17 | 1.7381 | 0.2370 | 0.8319 | 0.026* | |
C18 | 1.5322 (4) | 0.3604 (2) | 0.7942 (2) | 0.0186 (5) | |
H18 | 1.4741 | 0.3457 | 0.8516 | 0.022* | |
C19 | 0.9641 (3) | 0.7257 (2) | 0.62029 (19) | 0.0132 (5) | |
C20 | 0.9485 (3) | 0.8468 (2) | 0.6597 (2) | 0.0153 (5) | |
H20 | 1.0031 | 0.8678 | 0.7303 | 0.018* | |
C21 | 0.8557 (3) | 0.9374 (2) | 0.5987 (2) | 0.0153 (5) | |
H21 | 0.8458 | 1.0191 | 0.6274 | 0.018* | |
C22 | 0.7771 (3) | 0.9074 (2) | 0.4951 (2) | 0.0141 (5) | |
C23 | 0.7907 (4) | 0.7859 (2) | 0.4545 (2) | 0.0164 (5) | |
H23 | 0.7359 | 0.7648 | 0.3840 | 0.020* | |
C24 | 0.8836 (3) | 0.6967 (2) | 0.5167 (2) | 0.0154 (5) | |
H24 | 0.8925 | 0.6146 | 0.4884 | 0.019* | |
C25 | 0.6747 (4) | 1.1152 (2) | 0.4644 (2) | 0.0196 (6) | |
H25A | 0.6039 | 1.1636 | 0.4089 | 0.029* | |
H25B | 0.8006 | 1.1521 | 0.4851 | 0.029* | |
H25C | 0.6138 | 1.1166 | 0.5245 | 0.029* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Br1 | 0.02570 (17) | 0.03300 (19) | 0.03209 (19) | 0.01428 (13) | 0.00041 (12) | −0.00323 (13) |
O1 | 0.0285 (11) | 0.0290 (11) | 0.0198 (10) | 0.0076 (9) | 0.0099 (9) | 0.0081 (9) |
O2 | 0.0181 (9) | 0.0157 (9) | 0.0203 (9) | 0.0013 (7) | −0.0009 (8) | 0.0053 (8) |
N1 | 0.0168 (10) | 0.0125 (10) | 0.0143 (10) | 0.0032 (8) | 0.0026 (8) | 0.0040 (8) |
N2 | 0.0139 (10) | 0.0133 (10) | 0.0140 (10) | 0.0025 (8) | 0.0023 (8) | 0.0037 (8) |
C1 | 0.0174 (12) | 0.0205 (13) | 0.0129 (12) | 0.0009 (11) | 0.0018 (10) | −0.0020 (10) |
C2 | 0.0200 (13) | 0.0246 (14) | 0.0206 (14) | 0.0025 (11) | 0.0065 (11) | 0.0015 (12) |
C3 | 0.0259 (14) | 0.0216 (14) | 0.0209 (14) | 0.0038 (12) | 0.0042 (12) | 0.0041 (12) |
C4 | 0.0177 (13) | 0.0239 (14) | 0.0185 (13) | 0.0078 (11) | −0.0025 (11) | −0.0043 (11) |
C5 | 0.0157 (13) | 0.0336 (16) | 0.0189 (14) | 0.0042 (12) | 0.0043 (11) | −0.0035 (12) |
C6 | 0.0212 (13) | 0.0268 (14) | 0.0147 (13) | 0.0023 (11) | 0.0054 (11) | 0.0038 (11) |
C7 | 0.0172 (12) | 0.0200 (13) | 0.0144 (12) | −0.0010 (10) | 0.0025 (10) | −0.0003 (11) |
C8 | 0.0195 (13) | 0.0189 (13) | 0.0149 (12) | 0.0006 (11) | 0.0044 (10) | 0.0007 (10) |
C9 | 0.0192 (12) | 0.0180 (12) | 0.0124 (12) | 0.0009 (10) | 0.0034 (10) | 0.0039 (10) |
C10 | 0.0141 (12) | 0.0149 (12) | 0.0151 (12) | 0.0014 (10) | 0.0024 (10) | 0.0015 (10) |
C11 | 0.0170 (12) | 0.0155 (12) | 0.0144 (12) | 0.0003 (10) | 0.0032 (10) | 0.0037 (10) |
C12 | 0.0111 (11) | 0.0113 (11) | 0.0157 (12) | −0.0011 (9) | 0.0013 (9) | −0.0006 (10) |
C13 | 0.0139 (11) | 0.0136 (11) | 0.0144 (12) | 0.0025 (10) | 0.0009 (10) | 0.0011 (10) |
C14 | 0.0189 (12) | 0.0140 (12) | 0.0160 (12) | 0.0025 (10) | 0.0040 (10) | 0.0016 (10) |
C15 | 0.0174 (12) | 0.0195 (13) | 0.0158 (13) | −0.0001 (10) | 0.0060 (10) | −0.0008 (10) |
C16 | 0.0172 (12) | 0.0191 (13) | 0.0244 (14) | 0.0043 (11) | 0.0067 (11) | 0.0013 (11) |
C17 | 0.0231 (14) | 0.0217 (14) | 0.0210 (14) | 0.0090 (11) | 0.0053 (11) | 0.0090 (11) |
C18 | 0.0190 (13) | 0.0186 (13) | 0.0200 (13) | 0.0036 (11) | 0.0064 (11) | 0.0073 (11) |
C19 | 0.0109 (11) | 0.0152 (12) | 0.0142 (12) | 0.0009 (9) | 0.0034 (9) | 0.0035 (10) |
C20 | 0.0155 (12) | 0.0185 (12) | 0.0116 (12) | 0.0004 (10) | 0.0018 (10) | 0.0013 (10) |
C21 | 0.0145 (12) | 0.0126 (12) | 0.0190 (13) | 0.0006 (10) | 0.0046 (10) | −0.0011 (10) |
C22 | 0.0088 (11) | 0.0157 (12) | 0.0185 (13) | −0.0015 (9) | 0.0038 (10) | 0.0059 (10) |
C23 | 0.0176 (12) | 0.0162 (12) | 0.0139 (12) | −0.0009 (10) | 0.0001 (10) | 0.0002 (10) |
C24 | 0.0165 (12) | 0.0124 (11) | 0.0172 (13) | −0.0013 (10) | 0.0032 (10) | −0.0002 (10) |
C25 | 0.0181 (13) | 0.0154 (12) | 0.0255 (14) | 0.0025 (11) | 0.0037 (11) | 0.0076 (11) |
Br1—C4 | 1.903 (3) | C11—H11 | 0.9500 |
O1—C7 | 1.224 (3) | C12—C19 | 1.480 (3) |
O2—C22 | 1.362 (3) | C13—C14 | 1.379 (4) |
O2—C25 | 1.434 (3) | C13—C18 | 1.388 (4) |
N1—C12 | 1.329 (3) | C14—C15 | 1.394 (3) |
N1—N2 | 1.366 (3) | C14—H14 | 0.9500 |
N2—C11 | 1.347 (3) | C15—C16 | 1.384 (4) |
N2—C13 | 1.435 (3) | C15—H15 | 0.9500 |
C1—C6 | 1.389 (4) | C16—C17 | 1.389 (4) |
C1—C2 | 1.393 (4) | C16—H16 | 0.9500 |
C1—C7 | 1.504 (4) | C17—C18 | 1.392 (4) |
C2—C3 | 1.383 (4) | C17—H17 | 0.9500 |
C2—H2 | 0.9500 | C18—H18 | 0.9500 |
C3—C4 | 1.376 (4) | C19—C20 | 1.394 (3) |
C3—H3 | 0.9500 | C19—C24 | 1.391 (3) |
C4—C5 | 1.382 (4) | C20—C21 | 1.385 (4) |
C5—C6 | 1.394 (4) | C20—H20 | 0.9500 |
C5—H5 | 0.9500 | C21—C22 | 1.391 (4) |
C6—H6 | 0.9500 | C21—H21 | 0.9500 |
C7—C8 | 1.470 (4) | C22—C23 | 1.400 (3) |
C8—C9 | 1.328 (4) | C23—C24 | 1.383 (4) |
C8—H8 | 0.9500 | C23—H23 | 0.9500 |
C9—C10 | 1.450 (3) | C24—H24 | 0.9500 |
C9—H9 | 0.9500 | C25—H25A | 0.9800 |
C10—C11 | 1.382 (3) | C25—H25B | 0.9800 |
C10—C12 | 1.427 (3) | C25—H25C | 0.9800 |
C22—O2—C25 | 117.2 (2) | C14—C13—N2 | 119.2 (2) |
C12—N1—N2 | 105.0 (2) | C18—C13—N2 | 119.4 (2) |
C11—N2—N1 | 112.2 (2) | C13—C14—C15 | 119.4 (2) |
C11—N2—C13 | 128.4 (2) | C13—C14—H14 | 120.3 |
N1—N2—C13 | 119.4 (2) | C15—C14—H14 | 120.3 |
C6—C1—C2 | 119.1 (2) | C16—C15—C14 | 120.2 (2) |
C6—C1—C7 | 118.7 (2) | C16—C15—H15 | 119.9 |
C2—C1—C7 | 122.1 (2) | C14—C15—H15 | 119.9 |
C3—C2—C1 | 120.8 (3) | C15—C16—C17 | 119.7 (2) |
C3—C2—H2 | 119.6 | C15—C16—H16 | 120.1 |
C1—C2—H2 | 119.6 | C17—C16—H16 | 120.1 |
C4—C3—C2 | 118.7 (3) | C16—C17—C18 | 120.7 (3) |
C4—C3—H3 | 120.6 | C16—C17—H17 | 119.7 |
C2—C3—H3 | 120.6 | C18—C17—H17 | 119.7 |
C3—C4—C5 | 122.3 (2) | C13—C18—C17 | 118.6 (2) |
C3—C4—Br1 | 118.9 (2) | C13—C18—H18 | 120.7 |
C5—C4—Br1 | 118.7 (2) | C17—C18—H18 | 120.7 |
C4—C5—C6 | 118.2 (2) | C20—C19—C24 | 118.3 (2) |
C4—C5—H5 | 120.9 | C20—C19—C12 | 119.7 (2) |
C6—C5—H5 | 120.9 | C24—C19—C12 | 121.8 (2) |
C1—C6—C5 | 120.8 (3) | C21—C20—C19 | 121.8 (2) |
C1—C6—H6 | 119.6 | C21—C20—H20 | 119.1 |
C5—C6—H6 | 119.6 | C19—C20—H20 | 119.1 |
O1—C7—C8 | 122.2 (2) | C20—C21—C22 | 119.3 (2) |
O1—C7—C1 | 119.7 (2) | C20—C21—H21 | 120.3 |
C8—C7—C1 | 118.1 (2) | C22—C21—H21 | 120.3 |
C9—C8—C7 | 121.1 (2) | O2—C22—C21 | 124.8 (2) |
C9—C8—H8 | 119.4 | O2—C22—C23 | 115.6 (2) |
C7—C8—H8 | 119.4 | C21—C22—C23 | 119.6 (2) |
C8—C9—C10 | 127.1 (2) | C24—C23—C22 | 120.2 (2) |
C8—C9—H9 | 116.4 | C24—C23—H23 | 119.9 |
C10—C9—H9 | 116.4 | C22—C23—H23 | 119.9 |
C11—C10—C12 | 104.5 (2) | C23—C24—C19 | 120.8 (2) |
C11—C10—C9 | 123.8 (2) | C23—C24—H24 | 119.6 |
C12—C10—C9 | 131.6 (2) | C19—C24—H24 | 119.6 |
N2—C11—C10 | 107.2 (2) | O2—C25—H25A | 109.5 |
N2—C11—H11 | 126.4 | O2—C25—H25B | 109.5 |
C10—C11—H11 | 126.4 | H25A—C25—H25B | 109.5 |
N1—C12—C10 | 111.1 (2) | O2—C25—H25C | 109.5 |
N1—C12—C19 | 118.7 (2) | H25A—C25—H25C | 109.5 |
C10—C12—C19 | 130.2 (2) | H25B—C25—H25C | 109.5 |
C14—C13—C18 | 121.4 (2) | ||
C12—N1—N2—C11 | 0.0 (3) | C9—C10—C12—C19 | 6.5 (5) |
C12—N1—N2—C13 | −179.2 (2) | C11—N2—C13—C14 | −171.7 (2) |
C6—C1—C2—C3 | 0.3 (4) | N1—N2—C13—C14 | 7.3 (3) |
C7—C1—C2—C3 | −177.2 (2) | C11—N2—C13—C18 | 8.5 (4) |
C1—C2—C3—C4 | 0.2 (4) | N1—N2—C13—C18 | −172.5 (2) |
C2—C3—C4—C5 | −0.8 (4) | C18—C13—C14—C15 | 1.4 (4) |
C2—C3—C4—Br1 | −178.9 (2) | N2—C13—C14—C15 | −178.5 (2) |
C3—C4—C5—C6 | 1.0 (4) | C13—C14—C15—C16 | −1.1 (4) |
Br1—C4—C5—C6 | 179.1 (2) | C14—C15—C16—C17 | 0.2 (4) |
C2—C1—C6—C5 | −0.1 (4) | C15—C16—C17—C18 | 0.6 (4) |
C7—C1—C6—C5 | 177.5 (2) | C14—C13—C18—C17 | −0.6 (4) |
C4—C5—C6—C1 | −0.5 (4) | N2—C13—C18—C17 | 179.2 (2) |
C6—C1—C7—O1 | −13.0 (4) | C16—C17—C18—C13 | −0.3 (4) |
C2—C1—C7—O1 | 164.4 (3) | N1—C12—C19—C20 | −120.3 (3) |
C6—C1—C7—C8 | 167.2 (2) | C10—C12—C19—C20 | 56.7 (4) |
C2—C1—C7—C8 | −15.4 (4) | N1—C12—C19—C24 | 54.7 (3) |
O1—C7—C8—C9 | −19.6 (4) | C10—C12—C19—C24 | −128.3 (3) |
C1—C7—C8—C9 | 160.2 (2) | C24—C19—C20—C21 | 0.1 (4) |
C7—C8—C9—C10 | 179.5 (2) | C12—C19—C20—C21 | 175.2 (2) |
C8—C9—C10—C11 | −174.4 (3) | C19—C20—C21—C22 | −0.6 (4) |
C8—C9—C10—C12 | 1.9 (5) | C25—O2—C22—C21 | 4.0 (4) |
N1—N2—C11—C10 | 0.3 (3) | C25—O2—C22—C23 | −176.8 (2) |
C13—N2—C11—C10 | 179.4 (2) | C20—C21—C22—O2 | −179.9 (2) |
C12—C10—C11—N2 | −0.5 (3) | C20—C21—C22—C23 | 0.9 (4) |
C9—C10—C11—N2 | 176.7 (2) | O2—C22—C23—C24 | 179.9 (2) |
N2—N1—C12—C10 | −0.3 (3) | C21—C22—C23—C24 | −0.8 (4) |
N2—N1—C12—C19 | 177.2 (2) | C22—C23—C24—C19 | 0.3 (4) |
C11—C10—C12—N1 | 0.5 (3) | C20—C19—C24—C23 | 0.1 (4) |
C9—C10—C12—N1 | −176.3 (3) | C12—C19—C24—C23 | −175.0 (2) |
C11—C10—C12—C19 | −176.6 (2) |
Cg1 is the centroid of the C1–C6 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
C11—H11···O1i | 0.95 | 2.25 | 3.198 (3) | 173 |
C25—H25B···Cg1ii | 0.98 | 2.61 | 3.478 (3) | 148 |
Symmetry codes: (i) −x+2, −y+1, −z+2; (ii) −x+2, −y+2, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C25H19BrN2O2 |
Mr | 459.33 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 100 |
a, b, c (Å) | 7.3643 (3), 10.6795 (5), 13.1038 (6) |
α, β, γ (°) | 91.822 (4), 101.311 (4), 91.792 (3) |
V (Å3) | 1009.31 (8) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 2.06 |
Crystal size (mm) | 0.50 × 0.40 × 0.30 |
Data collection | |
Diffractometer | Agilent SuperNova Dual diffractometer with an Atlas detector |
Absorption correction | Multi-scan (CrysAlis PRO; Agilent, 2013) |
Tmin, Tmax | 0.921, 1.000 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 8736, 4649, 3875 |
Rint | 0.038 |
(sin θ/λ)max (Å−1) | 0.651 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.043, 0.111, 1.04 |
No. of reflections | 4649 |
No. of parameters | 271 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.47, −0.55 |
Computer programs: CrysAlis PRO (Agilent, 2013), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 2012) and DIAMOND (Brandenburg, 2006), publCIF (Westrip, 2010).
Cg1 is the centroid of the C1–C6 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
C11—H11···O1i | 0.95 | 2.25 | 3.198 (3) | 173 |
C25—H25B···Cg1ii | 0.98 | 2.61 | 3.478 (3) | 148 |
Symmetry codes: (i) −x+2, −y+1, −z+2; (ii) −x+2, −y+2, −z+1. |
Footnotes
‡Additional correspondence author, e-mail: juliebhavana@gmail.com.
Acknowledgements
PB and RP gratefully acknowledge the Council of Scientific and Industrial Research (CSIR), India, for research grant 02 (0076)/12/EMR-II and Senior Research Fellowship (09/919/(0014)/2012 EMR-I), respectively. We also thank the Ministry of Higher Education (Malaysia) for funding structural studies through the High-Impact Research scheme (UM.C/HIR-MOHE/SC/03).
References
Agilent (2013). CrysAlis PRO. Agilent Technologies Inc., Santa Clara, CA, USA. Google Scholar
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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.
In addition to their being valuable intermediates in organic synthesis (Prasath & Bhavana, 2012), nitrogen-containing heterocyclic analogues, such as pyrazole chalcones, exhibit a variety of biological activities, e.g. anti-plasmodial, anti-microbial and anti-cancer activities (Prasath et al., 2013; Babasaheb et al., 2009). It was in this context that the title compound, (I), was investigated.
The molecular structure of (I), Fig. 1, comprises a planar (r.m.s. deviation = 0.003 Å) tri-substituted pyrazoyl ring. The N1- and C12-bound benzene rings form dihedral angles of 7.56 (13) and 56.48 (13)°, respectively, with the five-membered ring, and 60.88 (12)° with each other. The prop-2-en-1-one residue has an E-configuration about the C8═C9 double bond [1.328 (4) Å], and is also co-planar with the five-membered ring as seen in the value of the C8—C9—C10—C11 torsion angle of -174.4 (3)°. This planarity does not extend to the terminal benzene ring as there is a twist manifested in the C2—C1—C7—C8 torsion angle of -15.4 (4)°. The observed conformation for (I) resembles closely that reported recently for the unsubstituted parent compound (Fun et al., 2011).
In the crystal packing, centrosymmetrically related molecules are connected via C—H···O interactions, Table 1, and these are connected into a three-dimensional architecture by π—π [between centrosymmetrically related bromobenzene rings; 3.7597 (16)° for symmetry operation 1 - x, 2 - y, 2 - z] and methyl-C—H···π(methoxybenzene ring) interactions, Fig. 2 and Table 1.