title: Crystal structure of (E)-1-(4'-meth-oxy-[1,1'-biphen-yl]-4-yl)-3-(3-nitro-phen-yl)prop-2-en-1-one.
abstract: The title compound, C22H17NO4, crystallizes with two independent mol-ecules (A and B) in the asymmetric unit. Each mol-ecule exists as an E isomer with C-C=C-C torsion angles of -175.69 (17) and -178.41 (17)° in A and B, respectively. In mol-ecule A, the planes of the terminal benzene rings are twisted by an angle of 26.67 (10)°, while the biphenyl unit is non-planar, the dihedral angle between the rings being 30.81 (10)°. The dihedral angle between the nitro-phenyl ring and the inner phenyl ring is 6.50 (9)°. The corresponding values in mol-ecule B are 60.61 (9), 31.07 (8) and 31.05 (9)°. In the crystal, mol-ecules are arranged in a head-to-head manner, with the 3-nitro-phenyl groups nearly parallel to one another. The A and B mol-ecules are linked to one another via C-H⋯O hydrogen bonds, forming chains lying parallel to (-320) and enclosing R 2 (2)(10) and R 2 (2)(12) ring motifs. The meth-oxy group in both mol-ecules is positionally disordered with a refined occupancy ratio of 0.979 (4):0.021 (4) for mol-ecule A and 0.55 (4):0.45 (4) for mol-ecule B.
authors.affiliation: Department of Chemistry, Annamalai University, Annamalai Nagar 608 002, Tamilnadu, India.
authors.forename: T
authors.initials: T
authors.lastname: Vidhyasagar
authors.affiliation: Department of Chemistry, Annamalai University, Annamalai Nagar 608 002, Tamilnadu, India.
authors.forename: K
authors.initials: K
authors.lastname: Rajeswari
authors.affiliation: Department of Chemistry, Annamalai University, Annamalai Nagar 608 002, Tamilnadu, India.
authors.forename: D
authors.initials: D
authors.lastname: Shanthi
authors.affiliation: Department of Physics, Kunthavai Naachiar Government Arts College (W) (Autonomous), Thanjavur 613 007, Tamilnadu, India.
authors.forename: M
authors.initials: M
authors.lastname: Kayalvizhi
authors.affiliation: Department of Physics, Kunthavai Naachiar Government Arts College (W) (Autonomous), Thanjavur 613 007, Tamilnadu, India.
authors.forename: G
authors.initials: G
authors.lastname: Vasuki
authors.affiliation: Postgraduate Research Department of Physics, Rajah Serfoji Government College (Autonomous), Thanjavur 613 005, Tamilnadu, India.
authors.forename: A
authors.initials: A
authors.lastname: Thiruvalluvar
keywords: C—H⋯O hydrogen bonding; chalcones; crystal structure; main-residue disorder