Crystal structures of 3-fluoro-N-[2-(tri­fluoro­meth­yl)phen­yl]benzamide, 3-bromo-N-[2-(tri­fluoro­meth­yl)phen­yl]benzamide and 3-iodo-N-[2-(tri­fluoro­meth­yl)phen­yl]benzamide

Acta Crystallographica Section E: Crystallographic Communications

Suresha, E.¹  Suchetan, P.A.¹  Lokanath, N.K.²  Naveen, S.³ 

[1] Department of Chemistry, University College of Science, Tumkur University, Tumkur 572 103, India;Department of Studies in Physics, University of Mysore, Manasagangotri, Mysuru 570 006, India;Institution of Excellence, University of Mysore, Manasagangotri, Mysuru 570 006, India

关键词: CRYSTAL STRUCTURE;    AMIDE;    BENZAMIDE;    2-(TRIFLUOROMETHYL)PHENYL;    N-H...O HYDROGEN BONDING;    HALOGEN-HALOGEN CONTACTS;   

DOI  :  10.1107/S2056989016007866

学科分类：数学（综合）

来源: International Union of Crystallography

【 摘 要 】

In the title compounds, C14H9F4NO, (I), C14H9BrF3NO, (II), and C14H9F3INO, (III), the two benzene rings are inclined to one another by 43.94 (8)° in mol­ecule A and 55.66 (7)° in mol­ecule B of compound (I), which crystallizes with two independent mol­ecules in the asymmetric unit, but by only 10.40 (12)° in compound (II) and 12.5 (2)° in compound (III). In the crystals of all three compounds, N—H⋯O hydrogen bonds link the mol­ecules to form chains propagating along the a-axis direction for (I), and along the b-axis direction for (II) and (III). In the crystal of (I), –A–B–A–B– chains are linked by C—H⋯O hydrogen bonds, forming layers parallel to (010). Within the layers there are weak offset π–π inter­actions present [inter­centroid distances = 3.868 (1) and 3.855 (1) Å]. In the crystals of (II) and (III), the chains are linked via short halogen–halogen contacts [Br⋯Br = 3.6141 (4) Å in (II) and I⋯I = 3.7797 (5) Å in (III)], resulting in the formation of ribbons propagating along the b-axis direction.

【 授权许可】

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