Home Crystal structure of (4-(2-chlorophenyl)-1H-pyrrol-3-yl)(ferrocenyl) methanone, C21H16ClFeNO
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Crystal structure of (4-(2-chlorophenyl)-1H-pyrrol-3-yl)(ferrocenyl) methanone, C21H16ClFeNO

  • Cuiya Zhang , Zhoujing Zhu , Wenqiang Tang ORCID logo , Xiaona Xu and Bin Liu ORCID logo EMAIL logo
Published/Copyright: February 26, 2024

Abstract

C21H16ClFeNO, monoclinic, P21/c (no. 14), a = 10.3273(5) Å, b = 23.0536(11) Å, c = 7.2835(4) Å, β = 106.078(2)°, V = 1666.24(15) Å3, Z = 4, R gt(F) = 0.0558, wR ref(F 2) = 0.1219, T = 170 K.

The molecular structure is shown in the figure. Table 1 contains crystallographic data and Table 2 contains the list of the atoms including atomic coordinates and displacement parameters.

Table 1:

Data collection and handling.

Crystal: Red block
Size: 0.15 × 0.08 × 0.05 mm
Wavelength: Mo radiation (0.71073 Å)
μ: 1.07 mm−1
Diffractometer, scan mode: D8 VENTURE, φ and ω
θ max, completeness: 27.1°, >99 %
N(hkl)measured, N(hkl)unique, R int: 13,222, 3657, 0.089
Criterion for I obs, N(hkl)gt: I obs > 2σ(I obs), 2468
N(param)refined: 269
Programs: Bruker [1], SHELX [2, 3], Olex2 [4]
Table 2:

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

Atom x y z U iso*/U eq
Fe1 0.25336 (5) 0.35105 (2) 0.82963 (8) 0.02294 (17)
Cl1a 0.05697 (16) 0.54491 (7) 0.6815 (3) 0.0296 (4)
O1 0.3585 (2) 0.50292 (10) 0.8515 (3) 0.0208 (6)
Cl2b 0.4185 (3) 0.67316 (10) 0.5448 (4) 0.0336 (6)
N1 0.3308 (3) 0.51250 (14) 0.2226 (5) 0.0234 (7)
C12 0.3212 (3) 0.49782 (15) 0.5200 (5) 0.0188 (8)
C15 0.2811 (3) 0.55675 (16) 0.4674 (5) 0.0196 (8)
C8 0.3697 (4) 0.40858 (15) 0.7316 (5) 0.0223 (8)
C11 0.3477 (3) 0.47212 (15) 0.7092 (5) 0.0191 (8)
C9 0.4467 (4) 0.38270 (16) 0.9075 (6) 0.0253 (9)
H9 0.488558 0.402693 1.022686 0.030*
C13 0.3521 (4) 0.47309 (16) 0.3639 (5) 0.0228 (8)
H13 0.383181 0.434551 0.357755 0.027*
C14 0.2881 (4) 0.56354 (16) 0.2841 (5) 0.0237 (8)
H14 0.266825 0.598075 0.210790 0.028*
C17a 0.2521 (5) 0.60872 (17) 0.5843 (8) 0.0196 (16)
C18a 0.3223 (5) 0.6602 (2) 0.5853 (7) 0.0276 (17)
H18a 0.387529 0.662960 0.515894 0.033*
C20a 0.2970 (5) 0.70770 (16) 0.6878 (7) 0.0306 (15)
H20a 0.344970 0.742891 0.688515 0.037*
C22a 0.2015 (5) 0.70368 (17) 0.7894 (7) 0.0289 (16)
H22a 0.184217 0.736136 0.859464 0.035*
C24a 0.1313 (4) 0.6522 (2) 0.7884 (7) 0.0257 (16)
H24a 0.066022 0.649450 0.857795 0.031*
C26a 0.1566 (4) 0.60471 (16) 0.6859 (7) 0.0216 (14)
C4 0.1220 (4) 0.29255 (16) 0.8919 (6) 0.0273 (9)
H4 0.128840 0.251492 0.888335 0.033*
C2 0.1458 (4) 0.38677 (17) 0.9970 (6) 0.0308 (9)
H2 0.171445 0.419968 1.075962 0.037*
C3 0.1795 (4) 0.32886 (17) 1.0519 (6) 0.0296 (9)
H3 0.231615 0.316251 1.174234 0.036*
C10 0.4488 (4) 0.32197 (17) 0.8781 (6) 0.0315 (10)
H10 0.493608 0.294103 0.969879 0.038*
C5 0.0524 (4) 0.32887 (17) 0.7385 (6) 0.0310 (9)
H5 0.004414 0.316462 0.613795 0.037*
C7 0.3237 (4) 0.36291 (16) 0.5980 (6) 0.0304 (9)
H7 0.269559 0.367342 0.470073 0.037*
C1 0.0675 (4) 0.38699 (17) 0.8051 (6) 0.0325 (10)
H1A 0.030952 0.420357 0.732611 0.039*
C6 0.3723 (4) 0.31001 (17) 0.6877 (7) 0.0358 (10)
H6 0.356600 0.272691 0.630540 0.043*
C27b 0.1280 (8) 0.5781 (3) 0.6613 (12) 0.030 (2)
H27b 0.091465 0.540182 0.635835 0.036*
C16b 0.2318 (8) 0.5957 (3) 0.5868 (12) 0.019 (2)
C19b 0.2852 (7) 0.6512 (3) 0.6241 (12) 0.024 (2)
C21b 0.2348 (8) 0.6891 (2) 0.7359 (12) 0.032 (2)
H21b 0.271251 0.727051 0.761447 0.038*
C23b 0.1309 (8) 0.6715 (3) 0.8105 (11) 0.031 (3)
H23b 0.096427 0.697380 0.886866 0.037*
C25b 0.0775 (7) 0.6160 (3) 0.7731 (11) 0.038 (2)
H25b 0.006533 0.603946 0.824062 0.046*
H1 0.341 (4) 0.5053 (18) 0.107 (7) 0.040 (13)*
  1. aOccupancy: 0.6, bOccupancy: 0.4.

1 Source of materials

To a solution of 1-ferrocenyl-3-(2-chloropheny)-2-propen-1-one (3.50 g, 10 mmol) and tosylmethyl isocyanide (2.15 g, 11 mmol) in N,N-dimethylformamide (25 mL) was added potassium tert-butoxide (2.24 g, 20 mmol). The mixture was stirred at room temperature for 12 h, until the TLC indicated the reaction was completed. The mixture was diluted with brine, and then extracted with ethyl acetate (3 × 30 mL). The organic phase was washed with brine (30 mL), dried with anhydrous sodium sulfate, and then concentrated under pressure. The title compound was separated by silica-gel column chromatography with ethyl acetate-petroleum ether (25 %). The target product was obtained as a white solid. Yield: 60.2 %. For crystal growth, the product was dissolved in a minimal amount of hot ethanol and slowly cooled to room temperature.

2 Experimental details

The C-bound H atoms were placed in idealized positions and refined by the riding model with U iso(H) = 1.2 U eq(C).

3 Comment

Ferrocene derivatives have garnered significant interest as candidate drugs for their potential anticancer, antibacterial, antifungal, and antiparasitic properties [5]. Over the past decades, numerous crystal structures of diverse ferrocene derivatives have been reported, leading to the development of novel drug molecules [6], [7], [8].

The asymmetric unit contains a single molecule of the title compound. The stability of the crystal lattice primarily relies on the N–H⋯O intermolecular interactions between the oxygen atom of the keto group and the hydrogen atoms located on pyrrole. The dihedral angles between the two cyclopentadienyl rings of the ferrocene scaffold and the pyrrole ring are measured to be 39.9° and 39.7°, respectively, while the dihedral angles between the ferrocene scaffold and the chloro-phenyl ring are 80.9° and 80.2°, respectively. All bond lengths fall within the expected range, ensuring the compound’s structural integrity [9], [10], [11], [12]. These findings contribute to the expanding knowledge of ferrocene derivatives and their potential in drug devel.


Corresponding author: Bin Liu, Xianyang Key Laboratory of Molecular Imaging and Drug Synthesis, School of Pharmacy, Shaanxi Institute of International Trade & Commerce, Xianyang, Shaanxi, China, E-mail:

Award Identifier / Grant number: 2021JM-561

Funding source: Key Laboratory of Molecular Imaging and Drug Synthesis of Xianyang City

Award Identifier / Grant number: 2021QXNL–PT-0008

Funding source: Effective Substances of Traditional Chinese Medicine Innovative Team in Shaanxi Institute of International Trade & Commerce

Award Identifier / Grant number: SSY18TD01

  1. Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: This work was financially supported by the projects of Natural Science Foundation of Shannxi Province (2021JM-561), Key Laboratory of Molecular Imaging and Drug Synthesis of Xianyang City (2021QXNL–PT-0008) and Effective Substances of Traditional Chinese Medicine Innovative Team in Shaanxi Institute of International Trade & Commerce (SSY18TD01).

  3. Conflict of interest: The authors declare no conflicts of interest regarding this article.

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Received: 2024-01-08
Accepted: 2024-02-14
Published Online: 2024-02-26
Published in Print: 2024-06-25

© 2024 the author(s), published by De Gruyter, Berlin/Boston

This work is licensed under the Creative Commons Attribution 4.0 International License.

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