6-(4-Bromo-phenyl)-2-ethoxy-4-(4-ethoxyphenyl)nicotinonitrile

Abstract

The mol-ecule of the title nicotinonitrile derivative, C<inf>22</inf>H <inf>19</inf>BrN<inf>2</inf>O<inf>2</inf>, is non-planar, the central pyridine ring making dihedral angles of 7.34 (14) and 43.56 (15)° with the 4-bromophenyl and 4-ethoxyphenyl rings, respectively. The ethoxy group of the 4-ethoxyphenyl is slightly twisted from the attached benzene ring [C-O-C-C = 174.2 (3)°], whereas the ethoxy group attached to the pyridine ring is in a (+)syn-clinal conformation [C-O-C-C = 83.0 (3)°]. A weak intra-molecular C-H?N inter-action generates an S(5) ring motif. In the crystal structure, the mol-ecules are linked by weak inter-molecular C-H?N inter-actions into screw chains along the b axis. These chains stacked along the a axis. ?-? inter-actions with centroid-centroid distances of 3.8724 (16) and 3.8727 (16) Å are also observed.