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Crystal structure of N-(3,4-dichlorobenzylidene)-4-methylaniline, C14H11Cl2N

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Published/Copyright: February 7, 2017

Abstract

C14H11Cl2N, monoclinic, P21/c (no. 14), a = 6.1494(3) Å, b = 14.4196(5) Å, c = 14.2686(8) Å, β = 97.055(5)°, V = 1255.64(10) Å3, Z = 4, Rgt(F) = 0.0347, wRref(F2) = 0.0894, T = 290 K.

CCDC no.:: 1525722

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

Table 1

Data collection and handling.

Crystal:Colourless sheet
Size:0.45 × 0.40 × 0.33 mm
Wavelength:Mo Kα radiation (0.71073 Å)
μ:4.9 cm−1
Diffractometer, scan mode:Gemini S Ultra, ω-scans
2θmax, completeness:52°, >99%
N(hkl)measured, N(hkl)unique, Rint:6756, 2449, 0.020
Criterion for Iobs, N(hkl)gt:Iobs > 2 σ(Iobs), 2030
N(param)refined:155
Programs:CrysAlisPRO [4], SHELX [5]
Table 2

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

AtomxyzUiso*/Ueq
Cl10.43922(9)0.73283(3)0.63031(4)0.06131(18)
Cl20.85709(8)0.65646(3)0.54576(4)0.05815(17)
N10.8114(2)0.29318(9)0.62144(11)0.0440(4)
C10.4957(3)0.61516(11)0.63048(12)0.0413(4)
C20.6817(3)0.58194(11)0.59479(12)0.0386(4)
C30.7262(3)0.48821(11)0.59714(12)0.0392(4)
H30.85130.46610.57400.047*
C40.5846(3)0.42656(11)0.63396(12)0.0391(4)
C50.3978(3)0.46060(13)0.66749(13)0.0466(4)
H50.30070.41960.69090.056*
C60.3541(3)0.55461(13)0.66659(13)0.0464(4)
H60.22980.57690.69020.056*
C70.6305(3)0.32649(11)0.63733(12)0.0420(4)
H70.52130.28620.65180.050*
C80.8433(3)0.19551(11)0.62316(12)0.0391(4)
C90.6826(3)0.13134(12)0.59179(13)0.0441(4)
H90.54260.15150.56870.053*
C100.7296(3)0.03763(12)0.59470(13)0.0480(4)
H100.6190−0.00440.57460.058*
C110.9372(3)0.00453(12)0.62673(12)0.0447(4)
C121.0963(3)0.06917(12)0.65752(14)0.0500(5)
H121.23660.04900.68010.060*
C131.0512(3)0.16303(12)0.65542(14)0.0499(5)
H131.16170.20500.67590.060*
C140.9874(4)−0.09788(13)0.62742(16)0.0646(6)
H14A1.0628−0.11500.68790.097*
H14B1.0784−0.11150.57910.097*
H14C0.8532−0.13230.61570.097*

Source of material

The product was synthesized by solvent-free method [1, 2] . The raw materials 3,4-dichlorobenzaldehyde (98%) and p-methylaniline (98%) were purchased from J&K SCIENTIFIC LTD. Equimolar 3,4-dichlorobenzaldehyde and p-nitroaniline were stirred uniformly at first. Then, the mixture was placed

in the electric heating jacket to be heated and stirred until it was melted. The reaction process was monitored by thin layer chromatography (TCL). When the reaction was completed, the crude product was cooled to room temperature and solidified. White lamellar crystals of the title compound were obtained by recrystallizing with ethanol [3].

Experimental details

All hydrogen atoms were identified in difference Fourier syntheses. The structure was solved using the direct method and refined by full-matrix least-squares method on F2 using the SHELX program system [4]. All non-hydrogen atoms were refined anisotropically, whereas all hydrogen atoms were refined isotropically with a riding model using the default SHELX parameters.

Discussion

In the crystal structure, all bond lengths are within normal ranges. The two differently substituted phenyl rings are connected by a C = N moiety and show a dihedral angle of 46.99°. According to the space group symmetry the unit cell contains four N-(3,4-dichlorobenzylidene)-4-methylaniline molecules. There is at least one C—H⋯π interaction between H6 of one molecule to the tolyl moiety of an adjacent one (2.845 Å). There are π—π interactions between chloro substituted phenyl moieties with a plane to plane distance of 3.452 Å.

Award Identifier / Grant number: 21272063

Award Identifier / Grant number: 21402047

Funding statement: The project was supported by the National Natural Science Foundation of China (No. 21272063, 21402047) and Hunan Provincial Natural Science Foundation of China (No.14JJ3112).

Acknowledgements

The project was supported by the National Natural Science Foundation of China (No. 21272063, 21402047) and Hunan Provincial Natural Science Foundation of China (No.14JJ3112).

References

1 Cao, C. Z.; Lu, B. T.; Chen G. F.: Investigation of the substituent specific cross-interaction effects on 13C NMR of the C = N bridging group in substituted benzylidene anilines. J. Phys. Org. Chem. 24 (2011) 335–341.10.1002/poc.1760Search in Google Scholar

2 Schmeyers, J.; Toda, F.; Boy, J.; Kaupp G.: Quantitative solid–solid synthesis of azomethines. J. Chem. Soc., Perkin Trans. 4 (1998) 989–994.10.1039/a704633bSearch in Google Scholar

3 Wang, L. Y.; Cao, C. T.; Cao, C. Z.: Effect of substituent on the UV-Vis spectra: an extension from disubstituted to multi-substituted benzylideneanilines. J. Phys. Org. Chem. 29 (2016) 299–304.10.1002/poc.3533Search in Google Scholar

4 Agilent Technologies: CrysAlisPRO Software system, version 1.171.35.15, Agilent Technologies UK Ltd, Oxford, UK, 2011.Search in Google Scholar

5 Sheldrick, G. M.: A short history of SHELX. Acta Crystallogr. A64 (2008) 112–122.10.1107/S0108767307043930Search in Google Scholar PubMed

Received: 2016-7-22
Accepted: 2017-1-5
Published Online: 2017-2-7
Published in Print: 2017-3-1

©2017 Hua Yuan et al., published by De Gruyter.

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

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