organic compounds
3-(5-Chloro-3-methyl-1-phenylpyrazol-4-yl)-1,5-diphenylpentane-1,5-dione: sheets built from C—H⋯O and C—H⋯π(arene) hydrogen bonds
aGrupo de Investigación de Compuestos Heterocíclicos, Departamento de Química, Universidad de Valle, AA 25360 Cali, Colombia, bDepartamento de Química Inorgánica y Orgánica, Universidad de Jaén, 23071 Jaén, Spain, cDepartment of Chemistry, University of Aberdeen, Meston Walk, Old Aberdeen AB24 3UE, Scotland, and dSchool of Chemistry, University of St Andrews, Fife KY16 9ST, Scotland
*Correspondence e-mail: cg@st-andrews.ac.uk
Molecules of the title compound, C27H23ClN2O2, are linked into sheets of alternating large and small rings by a combination of C—H⋯O and C—H⋯π(arene) hydrogen bonds.
Comment
The title compound, (I), has been obtained from the base-catalysed condensation of 5-chloro-3-methyl-1-phenylpyrazole-4-carbaldehyde with acetophenone. Evidently, the intended target 3-(5-chloro-3-methyl-1-phenylpyrazol-4-yl)-1-phenylpropenone, (II), required as an intermediate for the synthesis of novel fused heterocyclic systems, has undergone a Michael-type reaction with a further molecule of acetophenone to form the observed product, (I).
Compound (I) and the analogous 3-(5-chloro-3-methyl-1-phenylpyrazol-4-yl)-1,5-di-2-thienylpentane-1,5-dione, (III) (Trilleras et al., 2005), both crystallize in the Pbca, with dimensions which are fairly similar, bearing in mind the different temperatures for the two determinations [293 (2) K for (I) and 120 (2) K for (III)], and hence the two compounds are isomorphous. In addition, the corresponding atom coordinates are very similar, as are the molecular conformations, with an all-trans and nearly planar aliphatic chain exhibiting approximate local mirror symmetry (Table 1). Indeed, with the exception of the N-bound phenyl ring (C11–C16), which makes a dihedral angle of 42.7 (2)° with the pyrazole ring, the entire molecule has approximate mirror symmetry. However, there are some significant differences between the supramolecular structures of (I) and (III), so that these compounds are not strictly isostructural.
The supramolecular aggregation in compound (I) is determined by a combination of C—H⋯O and C—H⋯π(arene)
hydrogen bonds (Table 1). Atom C8 in the molecule at (x, y, z) acts as hydrogen-bond donor to the C91–C96 ring in the molecule at (1 − x, 1 − y, 1 − z), so forming by inversion a centrosymmetric dimer, centred at (, , ) (Fig. 2). This behaviour thus mimics that of compound (III), where one of the thiophene rings acts as the hydrogen-bond acceptor. However, while the dimers in (III) are not further linked by any direction-specific intermolecular forces, those in (I) are linked into sheets by a single C—H⋯O hydrogen bond, whose action in isolation is to link the molecules into chains. Atom C14 in the molecule at (x, y, z) acts as hydrogen-bond donor to atom O7 in the molecule at (−x, + y, − z), so forming a C(12) (Bernstein et al., 1995) chain running parallel to the [010] direction and generated by the 21 screw axis along (0, y, ) (Fig. 3). The combined action of the two hydrogen bonds generates a sheet.The C14 atoms in the molecules at (x, y, z) and (1 − x, 1 − y, 1 − z), which form the dimer centred at (, , ), act as hydrogen-bond donors to O7 atoms in the molecules at (−x, + y, − z) and (1 + x, − y, − + z), respectively, which form parts of the dimers centred at (−, 1, 1) and (, 0, 0), respectively. Similarly, the O7 atoms at (x, y, z) and (1 − x, 1 − y, 1 − z) accept hydrogen bonds from the C14 atoms in the molecules at (−x, − + y, − z) and (1 + x, − y, − + z), respectively, which themselves lie in the dimers centred at (−, 0, 1) and (, 1, 0). Thus, each dimer is linked to four adjacent dimers, and propagation of these intermolecular interactions by the space-group symmetry operations links the molecules into a (102) sheet containing large and small rings alternating in chessboard fashion (Fig. 4).
The only direction-specific contact between adjacent sheets is a rather long C—H⋯O contact with aryl atom C73 as the donor (Table 2), but whose H⋯O distance is close to the van der Waals limit. This interaction is, therefore, probably of little or no structural significance.
In closely analogous 1,5-bis(4-chlorophenyl)-3-(2-chloroquinolin-3-yl)pentane-1,5-dione, (IV) (Insuasty et al., 2006), which also crystallizes in the Pbca, although with unit-cell dimensions markedly different from those of (I) and (III), a combination of one C—H⋯N hydrogen bond and one C—H⋯O hydrogen bond links the molecules into sheets of R44(26) rings, but C—H⋯π(arene) hydrogen bonds are absent.
Experimental
To a solution of acetophenone (1 mmol) and 5-chloro-4-formyl-3-methyl-1-phenylpyrazole (0.5 mmol) in absolute ethanol (10 ml), a catalytic amount of sodium hydroxide (1 pellet) was added and the reaction mixture was stirred at room temperature for 1 h. The precipitate which formed was isolated by filtration, washed with ethanol, dried and finally recrystallized from dimethylformamide to give colourless crystals suitable for single-crystal X-ray diffraction (m.p. 390 K, yield 65%). MS (70 eV) m/z (%): 442 (1, M+), 323 (30), 287 (16), 105 (100), 77 (58), 51 (10).
Crystal data
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Refinement
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The Pbca was uniquely assigned from the All H atoms were located in difference maps and then treated as riding atoms, with C—H distances of 0.93 (aromatic), 0.96 (CH3), 0.97 (CH2) or 0.98 Å (aliphatic CH), and with Uiso(H) = 1.2Ueq(C), or 1.5Ueq(C) for the methyl group.
Data collection: COLLECT (Nonius, 1999); cell DENZO (Otwinowski & Minor, 1997) and COLLECT; data reduction: DENZO and COLLECT; program(s) used to solve structure: SIR2004 (Burla et al., 2005); program(s) used to refine structure: OSCAIL (McArdle, 2003) and SHELXL97 (Sheldrick, 1997); molecular graphics: PLATON (Spek, 2003); software used to prepare material for publication: SHELXL97 and PRPKAPPA (Ferguson, 1999).
Supporting information
10.1107/S0108270106025583/gg3030sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S0108270106025583/gg3030Isup2.hkl
To a solution of 5-chloro-4-formyl-3-methyl-1-phenylpyrazole (0.5 mmol) and acetophenone (1 mmol) in absolute ethanol (10 ml), a catalytic amount of sodium hydroxide (1 pellet) was added and the reaction mixture was stirred at room temperature for 1 h. The precipitate which formed was isolated by filtration, washed with ethanol, dried and finally recrystallized from dimethylformamide to give colourless crystals suitable for single-crystal X-ray diffraction (m.p. 390 K, yield 65%). MS (70 eV) m/z (%) 442 (1, M+), 323?(30), 287?(16), 105?(100), 77?(58), 51?(10).
The
Pbca was uniquely assigned from the All H atoms were located in difference maps and then treated as riding atoms, with C—H distances of 0.93 (aromatic), 0.96 (CH3), 0.97 (CH2) or 0.98 Å (aliphatic CH), and with Uiso(H) = 1.2Ueq(C), or 1.5Ueq(C) for the methyl group.Data collection: COLLECT (Nonius, 1999); cell
DENZO (Otwinowski & Minor, 1997) and COLLECT; data reduction: DENZO and COLLECT; program(s) used to solve structure: SIR2004 (Burla et al., 2005); program(s) used to refine structure: OSCAIL (McArdle, 2003) and SHELXL97 (Sheldrick, 1997); molecular graphics: PLATON (Spek, 2003); software used to prepare material for publication: SHELXL97 and PRPKAPPA (Ferguson, 1999).C27H23ClN2O2 | F(000) = 1856 |
Mr = 442.92 | Dx = 1.311 Mg m−3 |
Orthorhombic, Pbca | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ac 2ab | Cell parameters from 5148 reflections |
a = 15.2964 (3) Å | θ = 2.1–27.5° |
b = 17.4366 (2) Å | µ = 0.20 mm−1 |
c = 16.8320 (3) Å | T = 120 K |
V = 4489.39 (13) Å3 | Needle, colourless |
Z = 8 | 0.25 × 0.07 × 0.03 mm |
Bruker Nonius KappaCCD area-detector diffractometer | 5148 independent reflections |
Radiation source: Bruker Nonius FR591 rotating anode | 3253 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.076 |
Detector resolution: 9.091 pixels mm-1 | θmax = 27.5°, θmin = 2.1° |
ϕ and ω scans | h = −18→19 |
Absorption correction: multi-scan (SADABS; Sheldrick, 2003) | k = −22→22 |
Tmin = 0.923, Tmax = 0.994 | l = −21→21 |
48477 measured reflections |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.049 | H-atom parameters constrained |
wR(F2) = 0.136 | w = 1/[σ2(Fo2) + (0.071P)2 + 0.5899P] where P = (Fo2 + 2Fc2)/3 |
S = 1.06 | (Δ/σ)max = 0.001 |
5148 reflections | Δρmax = 0.34 e Å−3 |
291 parameters | Δρmin = −0.36 e Å−3 |
0 restraints | Extinction correction: SHELXL97 (Sheldrick, 1997), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.0049 (6) |
C27H23ClN2O2 | V = 4489.39 (13) Å3 |
Mr = 442.92 | Z = 8 |
Orthorhombic, Pbca | Mo Kα radiation |
a = 15.2964 (3) Å | µ = 0.20 mm−1 |
b = 17.4366 (2) Å | T = 120 K |
c = 16.8320 (3) Å | 0.25 × 0.07 × 0.03 mm |
Bruker Nonius KappaCCD area-detector diffractometer | 5148 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 2003) | 3253 reflections with I > 2σ(I) |
Tmin = 0.923, Tmax = 0.994 | Rint = 0.076 |
48477 measured reflections |
R[F2 > 2σ(F2)] = 0.049 | 0 restraints |
wR(F2) = 0.136 | H-atom parameters constrained |
S = 1.06 | Δρmax = 0.34 e Å−3 |
5148 reflections | Δρmin = −0.36 e Å−3 |
291 parameters |
x | y | z | Uiso*/Ueq | ||
N1 | 0.08215 (10) | 0.51879 (9) | 0.67052 (9) | 0.0306 (4) | |
C11 | 0.01801 (13) | 0.57556 (12) | 0.68856 (12) | 0.0326 (5) | |
C12 | 0.01904 (13) | 0.61321 (12) | 0.76064 (13) | 0.0363 (5) | |
C13 | −0.04328 (14) | 0.66959 (13) | 0.77567 (13) | 0.0402 (5) | |
C14 | −0.10655 (14) | 0.68606 (13) | 0.72017 (14) | 0.0419 (6) | |
C15 | −0.10830 (13) | 0.64651 (13) | 0.64901 (15) | 0.0426 (6) | |
C16 | −0.04554 (13) | 0.59163 (12) | 0.63219 (13) | 0.0368 (5) | |
N2 | 0.05817 (10) | 0.45273 (9) | 0.63228 (9) | 0.0317 (4) | |
C3 | 0.13242 (12) | 0.41443 (11) | 0.62071 (11) | 0.0289 (5) | |
C31 | 0.13026 (14) | 0.33782 (12) | 0.58143 (13) | 0.0376 (5) | |
C4 | 0.20619 (12) | 0.45476 (11) | 0.65004 (11) | 0.0266 (4) | |
C41 | 0.30143 (12) | 0.43254 (11) | 0.64849 (11) | 0.0280 (4) | |
C6 | 0.33765 (13) | 0.42224 (11) | 0.73321 (11) | 0.0295 (4) | |
C7 | 0.31158 (13) | 0.34732 (11) | 0.77115 (11) | 0.0292 (4) | |
O7 | 0.28295 (10) | 0.29494 (8) | 0.73048 (9) | 0.0424 (4) | |
C71 | 0.32357 (12) | 0.33693 (11) | 0.85842 (11) | 0.0272 (4) | |
C72 | 0.31328 (13) | 0.26362 (12) | 0.89033 (12) | 0.0350 (5) | |
C73 | 0.32038 (14) | 0.25179 (13) | 0.97102 (13) | 0.0420 (5) | |
C74 | 0.33885 (14) | 0.31228 (13) | 1.02112 (13) | 0.0423 (5) | |
C75 | 0.35083 (14) | 0.38514 (12) | 0.99041 (13) | 0.0396 (5) | |
C76 | 0.34331 (13) | 0.39723 (11) | 0.90936 (12) | 0.0324 (5) | |
C8 | 0.35730 (12) | 0.49020 (11) | 0.60219 (11) | 0.0287 (4) | |
C9 | 0.34092 (12) | 0.49125 (11) | 0.51367 (12) | 0.0290 (4) | |
O9 | 0.29296 (9) | 0.44428 (8) | 0.48188 (8) | 0.0370 (4) | |
C91 | 0.38728 (12) | 0.55060 (11) | 0.46528 (11) | 0.0278 (4) | |
C92 | 0.37698 (12) | 0.55107 (12) | 0.38296 (12) | 0.0314 (5) | |
C93 | 0.41941 (13) | 0.60481 (12) | 0.33684 (12) | 0.0364 (5) | |
C94 | 0.47220 (14) | 0.65961 (12) | 0.37192 (13) | 0.0377 (5) | |
C95 | 0.48274 (15) | 0.66021 (12) | 0.45313 (13) | 0.0418 (5) | |
C96 | 0.44089 (13) | 0.60586 (12) | 0.50000 (12) | 0.0365 (5) | |
C5 | 0.17038 (12) | 0.52049 (11) | 0.68095 (11) | 0.0283 (4) | |
Cl5 | 0.22177 (3) | 0.59854 (3) | 0.72142 (3) | 0.03617 (17) | |
H12 | 0.0608 | 0.6011 | 0.7987 | 0.044* | |
H13 | −0.0421 | 0.6963 | 0.8235 | 0.048* | |
H14 | −0.1481 | 0.7237 | 0.7305 | 0.050* | |
H15 | −0.1520 | 0.6569 | 0.6121 | 0.051* | |
H16 | −0.0460 | 0.5659 | 0.5838 | 0.044* | |
H31A | 0.0708 | 0.3241 | 0.5699 | 0.056* | |
H31B | 0.1554 | 0.3002 | 0.6162 | 0.056* | |
H31C | 0.1632 | 0.3398 | 0.5329 | 0.056* | |
H41 | 0.3059 | 0.3830 | 0.6214 | 0.034* | |
H6A | 0.4009 | 0.4252 | 0.7314 | 0.035* | |
H6B | 0.3169 | 0.4641 | 0.7661 | 0.035* | |
H72 | 0.3015 | 0.2224 | 0.8569 | 0.042* | |
H73 | 0.3127 | 0.2028 | 0.9918 | 0.050* | |
H74 | 0.3433 | 0.3041 | 1.0756 | 0.051* | |
H75 | 0.3639 | 0.4259 | 1.0241 | 0.048* | |
H76 | 0.3516 | 0.4462 | 0.8888 | 0.039* | |
H8A | 0.3463 | 0.5411 | 0.6232 | 0.034* | |
H8B | 0.4185 | 0.4785 | 0.6113 | 0.034* | |
H92 | 0.3411 | 0.5148 | 0.3589 | 0.038* | |
H93 | 0.4125 | 0.6042 | 0.2819 | 0.044* | |
H94 | 0.5005 | 0.6960 | 0.3407 | 0.045* | |
H95 | 0.5180 | 0.6972 | 0.4767 | 0.050* | |
H96 | 0.4487 | 0.6064 | 0.5548 | 0.044* |
U11 | U22 | U33 | U12 | U13 | U23 | |
N1 | 0.0310 (9) | 0.0305 (9) | 0.0304 (9) | −0.0023 (7) | 0.0013 (7) | −0.0019 (7) |
C11 | 0.0300 (11) | 0.0329 (11) | 0.0348 (12) | −0.0029 (9) | 0.0082 (9) | 0.0048 (9) |
C12 | 0.0341 (12) | 0.0395 (12) | 0.0354 (12) | −0.0003 (9) | 0.0043 (9) | 0.0036 (10) |
C13 | 0.0459 (13) | 0.0348 (12) | 0.0400 (13) | 0.0001 (10) | 0.0158 (11) | 0.0041 (10) |
C14 | 0.0362 (12) | 0.0358 (12) | 0.0536 (15) | 0.0038 (10) | 0.0151 (11) | 0.0135 (11) |
C15 | 0.0314 (12) | 0.0497 (14) | 0.0466 (14) | 0.0031 (10) | 0.0058 (10) | 0.0138 (11) |
C16 | 0.0339 (11) | 0.0422 (12) | 0.0343 (12) | −0.0031 (10) | 0.0048 (9) | 0.0070 (10) |
N2 | 0.0335 (9) | 0.0329 (9) | 0.0286 (9) | −0.0063 (8) | −0.0011 (7) | −0.0024 (7) |
C3 | 0.0323 (11) | 0.0327 (11) | 0.0218 (10) | −0.0047 (9) | 0.0002 (8) | 0.0013 (8) |
C31 | 0.0424 (12) | 0.0361 (12) | 0.0342 (12) | −0.0060 (10) | −0.0033 (10) | −0.0056 (10) |
C4 | 0.0315 (10) | 0.0272 (10) | 0.0212 (10) | −0.0050 (8) | 0.0021 (8) | 0.0001 (8) |
C41 | 0.0317 (11) | 0.0298 (10) | 0.0226 (10) | −0.0011 (8) | 0.0000 (8) | −0.0003 (8) |
C6 | 0.0286 (10) | 0.0329 (11) | 0.0269 (11) | −0.0040 (9) | 0.0001 (8) | 0.0025 (8) |
C7 | 0.0298 (10) | 0.0287 (10) | 0.0290 (11) | 0.0012 (8) | 0.0002 (9) | 0.0002 (9) |
O7 | 0.0612 (10) | 0.0314 (8) | 0.0347 (9) | −0.0099 (7) | −0.0099 (7) | −0.0001 (6) |
C71 | 0.0225 (10) | 0.0312 (10) | 0.0278 (11) | −0.0002 (8) | 0.0005 (8) | 0.0042 (8) |
C72 | 0.0376 (11) | 0.0314 (11) | 0.0361 (12) | −0.0046 (9) | −0.0054 (9) | 0.0028 (9) |
C73 | 0.0455 (13) | 0.0394 (12) | 0.0411 (13) | −0.0045 (11) | −0.0046 (10) | 0.0137 (11) |
C74 | 0.0420 (12) | 0.0555 (14) | 0.0293 (12) | 0.0053 (11) | −0.0020 (10) | 0.0078 (11) |
C75 | 0.0479 (13) | 0.0418 (13) | 0.0292 (12) | 0.0050 (10) | −0.0041 (10) | −0.0026 (10) |
C76 | 0.0355 (11) | 0.0311 (11) | 0.0306 (11) | −0.0007 (9) | −0.0011 (9) | 0.0031 (9) |
C8 | 0.0288 (10) | 0.0312 (10) | 0.0261 (11) | −0.0021 (8) | 0.0017 (8) | −0.0005 (8) |
C9 | 0.0314 (10) | 0.0275 (10) | 0.0282 (11) | 0.0040 (9) | 0.0017 (8) | −0.0021 (8) |
O9 | 0.0491 (9) | 0.0344 (8) | 0.0274 (8) | −0.0100 (7) | −0.0011 (7) | −0.0025 (6) |
C91 | 0.0296 (10) | 0.0285 (10) | 0.0252 (11) | 0.0045 (8) | 0.0022 (8) | 0.0018 (8) |
C92 | 0.0288 (10) | 0.0368 (11) | 0.0287 (11) | 0.0026 (9) | −0.0011 (8) | −0.0017 (9) |
C93 | 0.0370 (12) | 0.0468 (13) | 0.0253 (11) | 0.0064 (10) | 0.0005 (9) | 0.0079 (9) |
C94 | 0.0391 (12) | 0.0346 (11) | 0.0394 (13) | 0.0036 (10) | 0.0084 (10) | 0.0144 (10) |
C95 | 0.0484 (13) | 0.0346 (12) | 0.0423 (14) | −0.0089 (10) | 0.0023 (11) | 0.0002 (10) |
C96 | 0.0455 (13) | 0.0372 (12) | 0.0267 (11) | −0.0042 (10) | 0.0019 (9) | −0.0003 (9) |
C5 | 0.0287 (11) | 0.0321 (11) | 0.0240 (10) | −0.0065 (9) | −0.0005 (8) | 0.0000 (8) |
Cl5 | 0.0369 (3) | 0.0328 (3) | 0.0388 (3) | −0.0075 (2) | 0.0021 (2) | −0.0088 (2) |
N1—C5 | 1.361 (2) | C7—C71 | 1.491 (3) |
N1—N2 | 1.370 (2) | C71—C76 | 1.390 (3) |
N1—C11 | 1.426 (3) | C71—C72 | 1.395 (3) |
C11—C12 | 1.380 (3) | C72—C73 | 1.378 (3) |
C11—C16 | 1.387 (3) | C72—H72 | 0.93 |
C12—C13 | 1.392 (3) | C73—C74 | 1.380 (3) |
C12—H12 | 0.93 | C73—H73 | 0.93 |
C13—C14 | 1.375 (3) | C74—C75 | 1.384 (3) |
C13—H13 | 0.93 | C74—H74 | 0.93 |
C14—C15 | 1.382 (3) | C75—C76 | 1.385 (3) |
C14—H14 | 0.93 | C75—H75 | 0.93 |
C15—C16 | 1.385 (3) | C76—H76 | 0.93 |
C15—H15 | 0.93 | C8—C9 | 1.511 (3) |
C16—H16 | 0.93 | C8—H8A | 0.97 |
N2—C3 | 1.332 (2) | C8—H8B | 0.97 |
C3—C4 | 1.418 (3) | C9—O9 | 1.223 (2) |
C3—C31 | 1.491 (3) | C9—C91 | 1.496 (3) |
C31—H31A | 0.96 | C91—C96 | 1.394 (3) |
C31—H31B | 0.96 | C91—C92 | 1.394 (3) |
C31—H31C | 0.96 | C92—C93 | 1.379 (3) |
C4—C5 | 1.373 (3) | C92—H92 | 0.93 |
C4—C41 | 1.508 (3) | C93—C94 | 1.383 (3) |
C41—C8 | 1.533 (3) | C93—H93 | 0.93 |
C41—C6 | 1.540 (3) | C94—C95 | 1.376 (3) |
C41—H41 | 0.98 | C94—H94 | 0.93 |
C6—C7 | 1.508 (3) | C95—C96 | 1.389 (3) |
C6—H6A | 0.97 | C95—H95 | 0.93 |
C6—H6B | 0.97 | C96—H96 | 0.93 |
C7—O7 | 1.222 (2) | C5—Cl5 | 1.7130 (19) |
C5—N1—N2 | 110.14 (15) | C76—C71—C72 | 118.68 (18) |
C5—N1—C11 | 129.75 (16) | C76—C71—C7 | 122.85 (17) |
N2—N1—C11 | 119.97 (16) | C72—C71—C7 | 118.46 (17) |
C12—C11—C16 | 120.89 (19) | C73—C72—C71 | 120.51 (19) |
C12—C11—N1 | 120.64 (18) | C73—C72—H72 | 119.7 |
C16—C11—N1 | 118.47 (19) | C71—C72—H72 | 119.7 |
C11—C12—C13 | 119.2 (2) | C72—C73—C74 | 120.3 (2) |
C11—C12—H12 | 120.4 | C72—C73—H73 | 119.9 |
C13—C12—H12 | 120.4 | C74—C73—H73 | 119.9 |
C14—C13—C12 | 120.4 (2) | C73—C74—C75 | 120.0 (2) |
C14—C13—H13 | 119.8 | C73—C74—H74 | 120.0 |
C12—C13—H13 | 119.8 | C75—C74—H74 | 120.0 |
C13—C14—C15 | 119.9 (2) | C74—C75—C76 | 119.8 (2) |
C13—C14—H14 | 120.1 | C74—C75—H75 | 120.1 |
C15—C14—H14 | 120.1 | C76—C75—H75 | 120.1 |
C14—C15—C16 | 120.6 (2) | C75—C76—C71 | 120.70 (19) |
C14—C15—H15 | 119.7 | C75—C76—H76 | 119.7 |
C16—C15—H15 | 119.7 | C71—C76—H76 | 119.7 |
C15—C16—C11 | 119.1 (2) | C9—C8—C41 | 114.64 (15) |
C15—C16—H16 | 120.5 | C9—C8—H8A | 108.6 |
C11—C16—H16 | 120.5 | C41—C8—H8A | 108.6 |
C3—N2—N1 | 105.19 (15) | C9—C8—H8B | 108.6 |
N2—C3—C4 | 112.27 (17) | C41—C8—H8B | 108.6 |
N2—C3—C31 | 119.69 (17) | H8A—C8—H8B | 107.6 |
C4—C3—C31 | 128.04 (18) | O9—C9—C91 | 120.63 (17) |
C3—C31—H31A | 109.5 | O9—C9—C8 | 121.53 (17) |
C3—C31—H31B | 109.5 | C91—C9—C8 | 117.83 (16) |
H31A—C31—H31B | 109.5 | C96—C91—C92 | 118.62 (18) |
C3—C31—H31C | 109.5 | C96—C91—C9 | 121.93 (17) |
H31A—C31—H31C | 109.5 | C92—C91—C9 | 119.45 (17) |
H31B—C31—H31C | 109.5 | C93—C92—C91 | 120.68 (19) |
C5—C4—C3 | 103.20 (16) | C93—C92—H92 | 119.7 |
C5—C4—C41 | 127.36 (17) | C91—C92—H92 | 119.7 |
C3—C4—C41 | 129.45 (17) | C92—C93—C94 | 120.24 (19) |
C4—C41—C8 | 112.27 (15) | C92—C93—H93 | 119.9 |
C4—C41—C6 | 111.19 (15) | C94—C93—H93 | 119.9 |
C8—C41—C6 | 110.28 (15) | C95—C94—C93 | 119.84 (19) |
C4—C41—H41 | 107.6 | C95—C94—H94 | 120.1 |
C8—C41—H41 | 107.6 | C93—C94—H94 | 120.1 |
C6—C41—H41 | 107.6 | C94—C95—C96 | 120.3 (2) |
C7—C6—C41 | 113.45 (16) | C94—C95—H95 | 119.8 |
C7—C6—H6A | 108.9 | C96—C95—H95 | 119.8 |
C41—C6—H6A | 108.9 | C95—C96—C91 | 120.31 (19) |
C7—C6—H6B | 108.9 | C95—C96—H96 | 119.8 |
C41—C6—H6B | 108.9 | C91—C96—H96 | 119.8 |
H6A—C6—H6B | 107.7 | N1—C5—C4 | 109.19 (16) |
O7—C7—C71 | 120.32 (17) | N1—C5—Cl5 | 121.57 (15) |
O7—C7—C6 | 120.33 (17) | C4—C5—Cl5 | 129.12 (15) |
C71—C7—C6 | 119.33 (16) | ||
C5—N1—C11—C12 | −45.8 (3) | C91—C9—C8—C41 | 174.85 (16) |
N2—N1—C11—C12 | 138.94 (19) | C9—C8—C41—C6 | 166.61 (16) |
C5—N1—C11—C16 | 134.5 (2) | C3—C4—C41—C8 | 119.4 (2) |
N2—N1—C11—C16 | −40.7 (3) | C76—C71—C72—C73 | 1.6 (3) |
C16—C11—C12—C13 | −1.9 (3) | C7—C71—C72—C73 | −177.48 (18) |
N1—C11—C12—C13 | 178.51 (18) | C71—C72—C73—C74 | −0.8 (3) |
C11—C12—C13—C14 | 1.8 (3) | C72—C73—C74—C75 | −0.4 (3) |
C12—C13—C14—C15 | −0.1 (3) | C73—C74—C75—C76 | 0.7 (3) |
C13—C14—C15—C16 | −1.6 (3) | C74—C75—C76—C71 | 0.2 (3) |
C14—C15—C16—C11 | 1.5 (3) | C72—C71—C76—C75 | −1.3 (3) |
C12—C11—C16—C15 | 0.2 (3) | C7—C71—C76—C75 | 177.74 (18) |
N1—C11—C16—C15 | 179.88 (17) | C4—C41—C8—C9 | −68.8 (2) |
C5—N1—N2—C3 | 0.7 (2) | C41—C8—C9—O9 | −6.8 (3) |
C11—N1—N2—C3 | 176.81 (16) | O9—C9—C91—C96 | 178.63 (18) |
N1—N2—C3—C4 | −0.7 (2) | C8—C9—C91—C96 | −3.0 (3) |
N1—N2—C3—C31 | 178.70 (17) | O9—C9—C91—C92 | −1.4 (3) |
N2—C3—C4—C5 | 0.5 (2) | C96—C91—C92—C93 | 0.4 (3) |
C31—C3—C4—C5 | −178.91 (19) | C9—C91—C92—C93 | −179.57 (17) |
N2—C3—C4—C41 | −179.47 (17) | C91—C92—C93—C94 | −0.7 (3) |
C31—C3—C4—C41 | 1.2 (3) | C92—C93—C94—C95 | 0.3 (3) |
C5—C4—C41—C8 | −60.5 (2) | C93—C94—C95—C96 | 0.3 (3) |
C5—C4—C41—C6 | 63.6 (2) | C94—C95—C96—C91 | −0.5 (3) |
C4—C41—C6—C7 | 77.6 (2) | C92—C91—C96—C95 | 0.2 (3) |
C41—C6—C7—O7 | 16.0 (3) | C9—C91—C96—C95 | −179.84 (19) |
O7—C7—C71—C76 | −170.18 (19) | N2—N1—C5—C4 | −0.5 (2) |
C6—C7—C71—C76 | 11.6 (3) | C11—N1—C5—C4 | −176.05 (18) |
O7—C7—C71—C72 | 8.9 (3) | N2—N1—C5—Cl5 | 175.80 (13) |
C72—C71—C7—C6 | −169.29 (18) | C11—N1—C5—Cl5 | 0.2 (3) |
C71—C7—C6—C41 | −165.78 (16) | C3—C4—C5—N1 | 0.0 (2) |
C7—C6—C41—C8 | −157.20 (16) | C41—C4—C5—N1 | 179.94 (17) |
C3—C4—C41—C6 | −116.5 (2) | C3—C4—C5—Cl5 | −175.88 (15) |
C92—C91—C9—C8 | 177.01 (17) | C41—C4—C5—Cl5 | 4.1 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
C8—H8B···Cgi | 0.97 | 2.79 | 3.673 (2) | 152 |
C14—H14···O7ii | 0.93 | 2.50 | 3.402 (3) | 165 |
C73—H73···O9iii | 0.93 | 2.59 | 3.449 (3) | 154 |
Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) −x, y+1/2, −z+3/2; (iii) x, −y+1/2, z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C27H23ClN2O2 |
Mr | 442.92 |
Crystal system, space group | Orthorhombic, Pbca |
Temperature (K) | 120 |
a, b, c (Å) | 15.2964 (3), 17.4366 (2), 16.8320 (3) |
V (Å3) | 4489.39 (13) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.20 |
Crystal size (mm) | 0.25 × 0.07 × 0.03 |
Data collection | |
Diffractometer | Bruker Nonius KappaCCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 2003) |
Tmin, Tmax | 0.923, 0.994 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 48477, 5148, 3253 |
Rint | 0.076 |
(sin θ/λ)max (Å−1) | 0.649 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.049, 0.136, 1.06 |
No. of reflections | 5148 |
No. of parameters | 291 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.34, −0.36 |
Computer programs: COLLECT (Nonius, 1999), DENZO (Otwinowski & Minor, 1997) and COLLECT, DENZO and COLLECT, SIR2004 (Burla et al., 2005), OSCAIL (McArdle, 2003) and SHELXL97 (Sheldrick, 1997), PLATON (Spek, 2003), SHELXL97 and PRPKAPPA (Ferguson, 1999).
C72—C71—C7—C6 | −169.29 (18) | C92—C91—C9—C8 | 177.01 (17) |
C71—C7—C6—C41 | −165.78 (16) | C91—C9—C8—C41 | 174.85 (16) |
C7—C6—C41—C8 | −157.20 (16) | C9—C8—C41—C6 | 166.61 (16) |
C3—C4—C41—C6 | −116.5 (2) | C3—C4—C41—C8 | 119.4 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
C8—H8B···Cgi | 0.97 | 2.79 | 3.673 (2) | 152 |
C14—H14···O7ii | 0.93 | 2.50 | 3.402 (3) | 165 |
C73—H73···O9iii | 0.93 | 2.59 | 3.449 (3) | 154 |
Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) −x, y+1/2, −z+3/2; (iii) x, −y+1/2, z+1/2. |
Acknowledgements
The X-ray data were collected by the EPSRC National X-ray Crystallography Service, University of Southampton, England. JC and JMT thank the Consejería de Innovación, Ciencia y Empresa (Junta de Andalucía, Spain) and the Universidad de Jaén for financial support. JMT also thanks the Universidad de Jaén for a research scholarship supporting a short stay at the EPSRC National X-ray Crystallography Service. JT and JQ thank COLCIENCIAS and UNIVALLE (Universidad del Valle, Colombia) for financial support.
References
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The title compound, (I), has been obtained from the base-catalysed condensation of 5-chloro-3-methyl-1-phenylpyrazole-4-carbaldehyde with acetophenone. Evidently, the intended target 3-(5-chloro-3-methyl-1-phenylpyrazol-4-yl)-1-phenylpropenone, (II), required as an intermediate for the synthesis of novel fused heterocyclic systems, has undergone a Michael-type reaction with a further molecule of acetophenone to form the observed product, (I).
Compound (I) and the analogous 3-(5-chloro-3-methyl-1-phenylpyrazol-4-yl)-1,5-di-2-thienylpentane-1,5-dione, (III) (Trilleras et al., 2005), both crystallize in space group Pbca, with dimensions which are fairly similar bearing in mind the different temperatures for the two determinations [293 (2) K for (I) and 120 (2) K for (III)], and hence the two compounds are isomorphous. In addition, the corresponding atom coordinates are very similar, as are the molecular conformations, with an all-trans and nearly planar aliphatic chain exhibiting approximate local mirror symmetry (Table 1). Indeed, with the exception of the N-phenyl ring C11–C16, which makes a dihedral angle of 42.7 (2)° with the pyrazole ring, the entire molecule has approximate mirror symmetry. However, there are some significant differences between the supramolecular structures of (I) and (III), so that these compounds are not strictly isostructural.
The supramolecular aggregation in compound (I) is determined by a combination of C—H···O and C—H···π(arene) hydrogen bonds (Table 1). Atom C8 in the molecule at (x, y, z) acts as hydrogen-bond donor to the ring C91–C96 in the molecule at (1 − x, 1 − y, 1 − z), so forming by inversion a centrosymmetric dimer, centred at (1/2, 1/2, 1/2) (Fig. 2). This behaviour thus mimics that of compound (III), where one of the thiophene rings acts as the hydrogen-bond acceptor. However, while the dimers in (III) are not further linked by any direction-specific intermolecular forces, those in (I) are linked into sheets by a single C—H···O hydrogen bond, whose action in isolation is to link the molecules into chains. Atom C14 in the molecule at (x, y, z) acts as hydrogen-bond donor to atom O7 in the molecule at (−x, 1/2 + y, 3/2 − z), so forming a C(12) (Bernstein et al., 1995) chain running parallel to the [010] direction and generated by the 21screw axis along (0, y, 3/4) (Fig. 3). The combined action of the two hydrogen bonds generates a sheet.
The atoms C14 in the molecules at (x, y, z) and (1 − x, 1 − y, 1 − z), which form the dimer centred at (1/2, 1/2, 1/2), act as hydrogen-bond donors to atoms O7 in the molecules at (−x, 1/2 + y, 3/2 − z) and (1 + x, 1/2 − y, −1/2 + z), respectively, which form parts of the dimers centred at (−1/2, 1, 1) and (3/2, 0, 0), respectively. Similarly, the atoms O7 at (x, y, z) and (1 − x, 1 − y, 1 − z) accept hydrogen bonds from the atoms C14 in the molecules at (−x, −1/2 + y, 3/2 − z) and (1 + x, 3/2 − y, −1/2 + z), respectively, which themselves lie in the dimers centred at (−1/2, 0, 1) and (3/2, 1, 0). Thus, each dimer is linked to four adjacent dimers, and propagation of these intermolecular interactions by the space group symmetry operations links the molecules into a (102) sheet containing large and small rings alternating in chessboard fashion (Fig. 4).
The only direction-specific contact between adjacent sheets is a rather long C—H···O contact with aryl atom C73 as the donor (Table 2), but whose H···O distance is close to the van der Waals limit. This interaction is, therefore, probably of little or no structural significance.
In the closely analogous compound 1,5-bis(4-chlorophenyl)-3-(2-chloroquinolin-3-yl)pentane-1,5-dione, (IV) (Insuasty et al., 2006), which also crystallizes in space group Pbca, although with unit-cell dimensions markedly different from those of (I) and (III), a combination one C—H···N hydrogen bond and one C—H···O hydrogen bond links the molecules into sheets of R44(26) rings, but C—H···π(arene) hydrogen bonds are absent.