Home Crystal structure of (4-chlorophenyl)(3-ferrocenyl-5-(trifluoromethyl)-1H-pyrazol-1-yl)methanone, C21H14ClF3FeN2O
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Crystal structure of (4-chlorophenyl)(3-ferrocenyl-5-(trifluoromethyl)-1H-pyrazol-1-yl)methanone, C21H14ClF3FeN2O

  • Ban-Feng Ruan , Kun Wang and Sheng-Song Deng EMAIL logo
Published/Copyright: April 6, 2017

Abstract

C21H14ClF3FeN2O, triclinic, P1̅ (no. 2), a = 7.8754(6) Å, b = 10.9326(10) Å, c = 11.8418(9) Å, α = 73.845(3)°, β = 84.237(2)°, γ = 74.207(3)°, V = 942.00(13) Å3, Z = 2, Rgt(F) = 0.0385, wRref(F2) = 0.0973, T = 273 K.

CCDC no.:: 1538864

The crystal structure is shown in the figure. Tables 1 and 2 contain details on crystal structure and measurement conditions and a list of the atoms including atomic coordinates and displacement parameters.

Table 1

Data collection and handling.

Crystal:Colourless block
Size:0.25 × 0.21 × 0.15 mm
Wavelength:Mo Kα radiation (0.71073 Å)
μ:9.9 cm−1
Diffractometer, scan mode:Bruker SMART, φ and ω
2θmax, completeness:52°, >99%
N(hkl)measured, N(hkl)unique, Rint:9535, 3708, 0.026
Criterion for Iobs, N(hkl)gt:Iobs > 2 σ(Iobs), 3000
N(param)refined:262
Programs:Bruker programs [1], SHELX [2]

Source of material

A mixture of 5-ferrocenyl-3-(trifluoromethyl)-1H-pyrazole (3.20 g, 0.01 mol, prepared by a literature method [3]), triethylamine (1.21 g, 0.012 mol), and 4-fluorobenzoyl chloride (0.012 mol) in 15 mL of CH2Cl2 were refluxed overnight. After the completion of the reaction, the mixture was evaporated under reduced pressure. The residue was dissolved in ethyl acetate and extracted with water for three times to remove the triethylamine. The organic layer was dried over Na2SO4, filtered and evaporated to yield the crude mixture. The title compound was obtained by column chromatography on silica gel using petroleum ether/ethylacetate (20:1, v/v, Rf = 0.4) as eluent.

Experimental details

All the non-hydrogen atoms were located in successive difference Fourier syntheses. The final refinement was performed with the hydrogen atoms riding on the parent atoms.

Discussion

Among various organometallics, ferrocene has provided a widely applicable platform for the preparation of functional derivatives used in many areas like catalysis, material science, crystal engineering and bio-organometallic chemistry [4], [5], [6], [7]. The introduction of a ferrocenyl moiety has recognized as an attractive way to develop drugs such as anti-malarial drugs chloroquine (termed ferroquine) [8], quinine, mefloquine, and artemisinin and the anti-cancer drug ferrocifen [9]. Previous studies from our groups have shown that ferrocene analogs containing pyrazolyl group could display impressive anticancer activity and act as effective metallodrugs [3, 10] .

Table 2

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2)

AtomxyzUiso*/Ueq
Fe10.25178(4)0.26276(3)0.97426(3)0.03792(13)
Cl1−0.29569(12)1.10841(9)0.67487(8)0.0810(3)
F10.8536(3)0.6022(2)0.5754(2)0.1006(7)
F20.6552(3)0.5964(3)0.46839(18)0.1117(8)
F30.8221(3)0.4176(2)0.5673(2)0.1187(9)
O10.5461(3)0.8131(2)0.57412(19)0.0719(6)
N10.3736(3)0.5925(2)0.79007(17)0.0415(5)
C10.4582(3)0.4689(2)0.8352(2)0.0376(5)
N20.4652(3)0.6329(2)0.68733(17)0.0431(5)
C20.6046(3)0.4271(3)0.7634(2)0.0443(6)
H20.68270.34400.77640.053*
C30.6074(3)0.5324(3)0.6726(2)0.0463(6)
C40.4295(4)0.7697(3)0.6298(2)0.0494(6)
C50.2478(3)0.8493(3)0.6442(2)0.0460(6)
C60.1004(3)0.8046(3)0.6418(2)0.0485(6)
H60.11430.71920.63630.058*
C7−0.0666(4)0.8849(3)0.6476(2)0.0513(6)
H7−0.16560.85610.64220.062*
C8−0.0842(4)1.0093(3)0.6615(2)0.0539(7)
C90.0593(5)1.0554(3)0.6640(3)0.0691(9)
H90.04461.13930.67350.083*
C100.2259(4)0.9771(3)0.6525(3)0.0643(8)
H100.32411.00970.65030.077*
C110.7342(5)0.5397(4)0.5699(3)0.0720(9)
C120.4002(3)0.3951(2)0.9484(2)0.0380(5)
C130.4911(3)0.2701(3)1.0183(2)0.0464(6)
H130.60020.21910.99990.056*
C140.3865(4)0.2371(3)1.1204(2)0.0533(7)
H140.41470.16021.18110.064*
C150.2322(4)0.3404(3)1.1149(2)0.0529(7)
H150.14120.34361.17140.063*
C160.2395(3)0.4378(2)1.0093(2)0.0450(6)
H160.15410.51650.98380.054*
C170.0286(5)0.2060(4)0.9709(4)0.0842(11)
H17−0.06950.21981.02090.101*
C180.1703(5)0.0971(3)0.9897(3)0.0753(10)
H180.18330.02451.05480.090*
C190.2915(5)0.1129(3)0.8955(3)0.0678(9)
H190.39850.05350.88680.081*
C200.2219(5)0.2351(4)0.8165(3)0.0727(10)
H200.27490.27150.74600.087*
C210.0580(5)0.2927(4)0.8629(4)0.0852(12)
H21−0.01750.37370.82840.102*

The title compound crystallizes in the triclinic space group P1̅ with one molecule in the asymmetric unit. The distances of the Fe center and each carbon atom of its Cp rings are between 2.016(3) Å (Fe1⋯C26) and 2.045(3) Å (Fe1⋯C10), this distance is nearly identical to the analogs average distance found in ferrocene. The pyrazole moiety is almost in the same plane as the directly bonded Cp rings.

Acknowledgement

This work was supported by the Fundamental Research Funds for the Central Universities (Chunhua project 2013HGCH0015).

References

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Received: 2016-10-5
Accepted: 2017-3-19
Published Online: 2017-4-6
Published in Print: 2017-5-24

©2017 Ban-Feng Ruan et al., published by De Gruyter, Berlin/Boston

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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