title: 6-(4-Bromo-phen-yl)-2-eth-oxy-4-(2,4,6-trimethoxy-phen-yl)nicotinonitrile.
abstract: In the asymmetric unit of the title nicotinonitrile derivative, C(23)H(21)BrN(2)O(4), there are two non-planar independent mol-ecules. The central pyridine ring makes dihedral angles of 9.05 (7) and 77.06 (7)°, respectively, with the 4-bromo-phenyl and 2,4,6-trimethoxy-phenyl rings in one mol-ecule, whereas the corresponding values are 5.96 (7) and 82.37 (7)° in the other. All the three meth-oxy groups are essentially in the plane of the attached benzene ring [C-O-C-C angles = 2.99 (19), 4.8 (2) and -6.2 (2)° in one mol-ecule, and 2.69 (18), 176.73 (15) and 1.3 (2)° in the other]. The eth-oxy group is slightly twisted in one mol-ecule [C-C-O-C = 173.84 (12)°], whereas it is coplanar with the pyridine ring in the other [C-C-O-C = -177.23 (13)°]. Weak intra-molecular C-H⋯N inter-actions generate S(5) ring motifs. In the crystal structure, the mol-ecules are linked by weak inter-molecular C-H⋯N and C-H⋯O inter-actions into a supra-molecular three-dimensional network in such a way that the nicotinonitrile units of neighboring mol-ecules are stacked in an anti-parallel manner along the c axis. The crystal is further stabilized by C-H⋯π inter-actions.
authors.forename: Suchada
authors.initials: S
authors.lastname: Chantrapromma
authors.forename: Hoong-Kun
authors.initials: HK
authors.lastname: Fun
authors.forename: Thitipone
authors.initials: T
authors.lastname: Suwunwong
authors.forename: Mahesh
authors.initials: M
authors.lastname: Padaki
authors.forename: Arun M
authors.initials: AM
authors.lastname: Isloor