title: 3-amino-4'-methyl-5-ethylbiphenyl-2,4-dicarbonitrile and 3-amino-4'-(n,n-diethylamino)-5-ethylbiphenyl-2,4-dicarbonitrile.
abstract: In the title compounds, C17H15N3 and C20H22N4, the methyl derivative crystallizes with two molecules in the asymmetric unit, while the N,N-diethylamino derivative crystallizes with one molecule per asymmetric unit. The biphenyl twist angle for both molecular structures is approximately 45 degrees. The molecular packing is stabilized by N-H...N hydrogen bonds.
authors.affiliation: Department of Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai 600 025, India.
authors.forename: A
authors.initials: A
authors.lastname: Subbiah Pandi
authors.forename: D
authors.initials: D
authors.lastname: Velmurugan
authors.forename: S
authors.initials: S
authors.lastname: Shanmuga Sundara Raj
authors.forename: H K
authors.initials: HK
authors.lastname: Fun
authors.forename: V
authors.initials: V
authors.lastname: Raghukumar
authors.forename: V T
authors.initials: VT
authors.lastname: Ramakrishnan