Home The crystal structure of 4-(trifluoromethyl)nicotinic acid, C7H4F3NO2
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The crystal structure of 4-(trifluoromethyl)nicotinic acid, C7H4F3NO2

  • Gui-Jie Liu , Meng-En Zhu , Jin-Rui Hou and Bin Cai ORCID logo EMAIL logo
Published/Copyright: February 17, 2020

Abstract

C7H4F3NO2, monoclinic, P21/c (no. 14), a = 6.4488(11) Å, b = 14.922(2) Å, c = 7.7868(12) Å, β = 100.941(5)°, V = 735.7(2) Å3, Z = 4, Rgt(F) = 0.0431, wRref(F2) = 0.1158, T = 150(2) K.

CCDC no.: 1982036

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:Colourless block
Size:0.25 × 0.20 × 0.10 mm
Wavelength:Mo Kα radiation (0.71073 Å)
μ:0.18 mm−1
Diffractometer, scan mode:Bruker APEX-II, φ and ω
θmax, completeness:25.2°, >99%
N(hkl)measured, N(hkl)unique, Rint:8642, 1327, 0.060
Criterion for Iobs, N(hkl)gt:Iobs > 2 σ(Iobs), 968
N(param)refined:123
Programs:Bruker [1], SHELX [2], Olex2 [3], [4]
Table 2:

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

AtomxyzUiso*/Ueq
C10.2564(3)0.24552(14)0.6831(3)0.0226(5)
C20.4344(3)0.30516(14)0.7697(3)0.0212(5)
C30.4464(3)0.39823(14)0.7541(3)0.0237(5)
C40.6210(4)0.44297(15)0.8461(3)0.0281(6)
H40.6330390.5061390.8364680.034*
C50.7774(4)0.39415(15)0.9522(3)0.0282(6)
H50.8962060.4251571.0158530.034*
C60.6021(3)0.26272(14)0.8778(3)0.0237(5)
H60.5977460.1993040.8872860.028*
C70.2776(4)0.45240(15)0.6375(3)0.0307(6)
F10.1061(2)0.46464(9)0.70817(18)0.0385(4)
F20.3486(2)0.53504(8)0.6096(2)0.0458(5)
F30.2174(2)0.41500(9)0.48051(17)0.0383(4)
N10.7683(3)0.30548(12)0.9687(2)0.0264(5)
O10.0700(3)0.28262(11)0.6696(2)0.0339(5)
O20.2894(3)0.17027(10)0.6368(2)0.0307(4)
H1−0.031(6)0.249(2)0.597(5)0.091(12)*

Source of material

Both the starting materials, 4-(trifluoromethyl)nicotinic acid and THF, are commercial and used without further purification. 1.91 g 4-(trifluoromethyl)nicotinic acid (1 mmol) was added to 25 mL THF at room temperature. After stirring for 15 min, the solution was filtered and sat quietly. Colorless crystals were obtained, yield 88.6% (based on 4-(trifluoromethyl)nicotinic acid).

Experimental details

The structure was solved by direct methods with the SHELXS program. All H-atoms from C, N and O atoms were positioned with idealized geometry and refined isotropic (Uiso(H) = 1.2Ueq(C), 1.2Ueq(N) and Uiso(H) = 1.5Ueq (O, respectively), for all H atoms) using a riding model with C—H = 0.950 Å and O—H = 0.925 Å).

Comment

The research on nicotinic acid derivatives becomes a growing area of scientific interest due to the bioactivity of them. In 1953, Wright and coworker already reported the crystal structure of nicotinic acid [5]. Thereafter, many crystal structures of nicotinic acid derivatives, especially halogeno-substituted derivatives, have been reported, such as F-, Cl-, Br-, I-substituted nicotinic acid derivatives [6], [7], [8]. Anilinonicotinic acids have aroused interest for a long time and a number of crystal structures have been reported successively [9], [10], [11], [12], [13]. Some other substituted nicotinic acid derivatives although have been made [14], [15], [16], [17]. However, to the best of our knowledge, the trifluoromethyl-substituted nicotinic acid have not been reported until now.

As shown in the figure, 4-(trifluoromethyl)nicotinic acid crystallizes in monoclinic, P21/c group with one molecule in the asymmetric unit. All of the C and N atoms are nearly co-planar. All bond lengths and angles of the title compound are comparable with its analogues [5], [6], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18]. The classical hydrogen bond, O—H⋯N, generates a one-dimensional structure by a head-to-tail mode. There are at least two kinds of non-classical hydrogen bonds: C—H⋯O and C—H⋯F, which link one-dimesional chains mentioned above to a two-dimensional structure.

Award Identifier / Grant number: 192102210028

Award Identifier / Grant number: 51602358

Funding statement: This work was supported by Key Scientific and Technological Research Projects in Henan Province (192102210028) and the National Natural Science Foundation of China (51602358).

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Received: 2019-12-18
Accepted: 2020-02-05
Published Online: 2020-02-17
Published in Print: 2020-04-28

©2020 Gui-Jie Liu et al., published by De Gruyter, Berlin/Boston

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

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  78. The crystal structure of (2,3-dioxo-5,6:13,14-dibenzo-9,10-benzo-1,4,8,11-7, 11-diene-κ4N,N′,N′′,N′′′)-nickel(II), Ni(C22H14N4O2)
  79. Crystal structure of 3-(1-benzyl-2-ethyl-4-nitro-1H-imidazol-5-ylthio)-propanoic acid, C15H17N3O4S
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  81. Crystal structure and antimicrobial properties of (1,4,7,10-tetraoxacyclododecane-κ4O,O′,O′′,O′′′)cesium(I) pentaiodide, C16H32CsI5O8
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