Home The crystal structure of ethyl 2-(3-(2-ethoxy-2-oxoethyl)benzo[d] thiazol-2(3H)-ylidene)acetate, C15H17NO4S
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The crystal structure of ethyl 2-(3-(2-ethoxy-2-oxoethyl)benzo[d] thiazol-2(3H)-ylidene)acetate, C15H17NO4S

  • Deng-Ze Wu EMAIL logo
Published/Copyright: August 2, 2019

Abstract

C15H17NO4S, orthorhombic, Pbca (no. 61), a = 9.9890(11) Å, b = 14.4529(16) Å, c = 21.635(2) Å, V = 3123.4(6) Å3, Z = 8, Rgt(F) = 0.0565, wRref(F2) = 0.1656, T = 293(2) K.

CCDC no.: 1916643

The molecular structure is shown in the figure (Hydrogen atoms are omitted for clarity). 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:Colorless prismatic
Size:0.20 × 0.16 × 0.13 mm
Wavelength:Mo Kα radiation (0.71073 Å)
μ:0.22 mm−1
Diffractometer, scan mode:APEX CCD, φ and ω
θmax, completeness:25.0°, 97%
N(hkl)measured, N(hkl)unique, Rint:16103, 2745, 0.047
Criterion for Iobs, N(hkl)gt:Iobs > 2 σ(Iobs), 1985
N(param)refined:220
Programs:Bruker [1], SHELX [2], [3], Diamond [4]
Table 2:

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

AtomxyzUiso*/Ueq
S10.60644(8)0.22712(6)0.58873(3)0.0654(3)
N10.5023(2)0.19535(14)0.69547(10)0.0503(6)
O10.4639(3)0.37876(17)0.54489(10)0.0888(7)
O20.3299(2)0.46485(15)0.60470(10)0.0744(6)
O30.6185(2)0.30863(16)0.78006(10)0.0765(6)
C10.6022(3)0.12826(18)0.68930(13)0.0537(7)
C20.6380(3)0.06146(19)0.73131(16)0.0668(8)
H20.59500.05720.76930.080*
C30.7391(4)0.0011(2)0.7159(2)0.0839(11)
H30.7637−0.04480.74380.101*
C40.8038(4)0.0071(2)0.6606(2)0.0918(12)
H40.8718−0.03470.65140.110*
C50.7698(3)0.0742(2)0.61819(17)0.0783(10)
H50.81410.07820.58050.094*
C60.6683(3)0.1355(2)0.63294(13)0.0603(7)
C70.4935(2)0.25685(17)0.64751(12)0.0488(6)
C80.4119(3)0.33077(18)0.64578(13)0.0544(7)
H80.35740.34320.67960.065*
C90.4066(3)0.3909(2)0.59328(14)0.0610(7)
C100.3194(5)0.5333(3)0.55617(18)0.0973(12)
H10A0.40740.54630.53920.117*
H10B0.26300.51010.52310.117*
C110.2632(8)0.6154(3)0.5813(2)0.151(2)
H11A0.19270.59950.60950.227*
H11B0.22770.65270.54840.227*
H11C0.33130.64940.60280.227*
C120.4344(2)0.21128(17)0.75308(12)0.0508(6)
H12A0.42280.15300.77460.061*
H12B0.34630.23690.74500.061*
C130.5122(3)0.27675(19)0.79307(13)0.0569(7)
O4a0.4419(8)0.3038(4)0.8397(3)0.0710(13)
C14a0.5084(6)0.3689(5)0.8811(2)0.0747(12)
H14Aa0.49600.43190.86690.090*
H14Ba0.60360.35600.88330.090*
C15a0.4408(9)0.3543(6)0.9452(3)0.0953(18)
H15Aa0.34760.36980.94250.143*
H15Ba0.48320.39340.97530.143*
H15Ca0.45010.29080.95750.143*
O4’b0.4570(13)0.2754(7)0.8524(5)0.0772(16)
C14’b0.5272(10)0.3168(7)0.9073(5)0.0861(15)
H14Cb0.52810.27330.94150.103*
H14Db0.61880.33250.89690.103*
C15’b0.4561(14)0.3956(8)0.9232(6)0.106(2)
H15Db0.45050.43600.88810.158*
H15Eb0.50090.42690.95640.158*
H15Fb0.36750.37860.93610.158*
  1. aOccupancy: 0.6, bOccupancy: 0.4.

Source of material

The title compound was prepared according to published method [5], and obtained pale yellow solid. 1H NMR (Bruker Avance 500 MHz, CDCl3) δ ppm: 7.43–7.42 (m, 1H), 7.21–7.18 (m, 1H), 7.06–7.03 (m, 1H), 6.84–6.83 (m, 1H), 5.09 (s, 1H), 4.50 (s, 2H), 4.2–4.13 (m, 4H), 1.25–1.19 (m, 6H); 13C NMR (Bruker Avance 500 MHz, CDCl3) δ ppm: 168.6, 166.6, 160.8, 140.3, 126.5, 126.2, 122.5, 122.0, 108.8, 79.7, 62.2, 59.5, 46.6, 14.6, 14.1. Single crystal suitable for X-ray diffraction cultured from a slow evaporation of a mixture of acetone and petroleum ether.

Experimental details

H atoms bonded to C atoms were positioned geometrically and refined using a riding model, with Uiso(H) = 1.5 Ueq(C) for methyl H atoms and 1.2 Ueq(C) for all other H atoms. All the non-hydrogen atoms were refined anisotropically.

Comment

In recent decades, benzothiazole derivatives have been found to bear a variety of biological activity and widely used in the field of industry [6], [7], agriculture [8], and medicine [9], [10]. Thus, the synthesis and crystal structures of various benzothiazole derivatives have attracted great attention [5], [11], [12]. In the title compound, the benzo and the thiazole moiety are in the same plane. This planar parent structure is present in previously reported benzothiazolylacetate [12]. There are three kinds of C—H⋯O hydrogen bonds, such as C(10)—H(10A)⋯O(1) hydrogen bond (2.477 Å), C(8)—H(8)⋯O(3) hydrogen bond (2.590 Å), and C(12)—H(12B)⋯O(3) hydrogen bond (2.559 Å). Although the benzo and the thiazole ring are coplanar, there is no π-π stacking interaction but a kind of aliphatic C(12)—H(12A)⋯π (benzo moiety) bond (2.741 Å). This is should be ascribed to the the presence of the torsion angle (85.2°) between the N-substituted group and benzothiazole ring, which causes that there is no overlap between the aromatic cycles in the upper and lower molecules.

Acknowledgements

I acknowledge the financial support from Wenzhou University for the publication fee.

References

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Received: 2019-05-20
Accepted: 2019-07-12
Published Online: 2019-08-02
Published in Print: 2019-11-26

©2019 Deng-Ze Wu, published by De Gruyter, Berlin/Boston

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

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