Crystal structures of isomeric 4-bromo--[(2-nitro-phen-yl)sulfon-yl]benzamide and 4-bromo--[(4-nitro-phen-yl)sulfon-yl]benzamide.

The syntheses and crystal structures of the isomeric 4-bromo--[(2-nitro-phen-yl)sulfon-yl]benzamide, (I), and 4-bromo--[(4-nitro-phen-yl)sulfon-yl]benzamide, (II), are described (mol-ecular formula = CHBrNOS in each case). The asymmetric unit of (I) contains two independent mol-ecules [(I) and (I)], while that of (II) contains one mol-ecule. The benzoic acid aromatic ring of mol-ecule (I) is disordered due to rotation about the C-C(=O) bond over two orientations in a 0.

Crystal structures of 3-fluoro-N-[2-(tri-fluoro-meth-yl)phen-yl]benzamide, 3-bromo-N-[2-(tri-fluoro-meth-yl)phen-yl]benzamide and 3-iodo-N-[2-(tri-fluoro-meth-yl)phen-yl]benzamide.

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 mol-ecule A and 55.66 (7)° in mol-ecule B of compound (I), which crystallizes with two independent mol-ecules in the asymmetric unit, but by only 10.

N-(4-Meth-oxy-benzo-yl)benzene-sulfon-amide.

In the title compound, C14H13NO4S, the dihedral angle between the aromatic rings is 69.81 (1)°; the dihedral angle between the planes defined by the S-N-C=O segment of the central chain and the sulfonyl benzene ring is 74.91 (1)°.

N-[(2-Chloro-phen-yl)sulfon-yl]-2-meth-oxy-benzamide.

The title compound, C14H12ClNO4S, crystallizes with two mol-ecules in the asymmetric unit. The dihedral angles between the benzene rings are 89.68 (1) (mol-ecule 1) and 82.