Research Article: Butyl 4-(4-methyl­benzene­sulfonamido)­benzoate

Date Published: May 01, 2012

Publisher: International Union of Crystallography

Author(s): Ghulam Mustafa, Mehmet Akkurt, Yılmaz Dağdemir, Islam Ullah Khan.


In the title compound, C18H21NO4S, the aromatic rings are almost normal to each other, with a dihedral angle of 89.27 (18)°. The mol­ecular conformation is stabilized by an intra­molecular C—H⋯O inter­action, which generates an S(6) motif. In the crystal, N—H⋯O and C—H⋯O hydrogen bonds lead to the formation of chains propagating along [010]. Neighbouring chains are linked via a C—H⋯π inter­action. The –CH2CH2CH3 atoms of the butyl group are disordered over two sets of sites, with a refined site-occupancy ratio of 0.536 (16):0.464 (16).

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For related structures, see: Mustafa et al. (2010 ▶, 2011 ▶, 2012 ▶); Khan et al. (2011 ▶). For bond-length data, see: Allen et al. (1987 ▶). For the graph-set analysis of hydrogen bonding, see: Bernstein et al. (1995 ▶).