title: 2-tert-Butylamino-4-chloro-6-ethylamino-1,3,5-triazine: a structure with Z' = 4 containing two different molecular conformations and two independent chains of hydrogen-bonded R(2)2(8) rings.
abstract: The title compound (trivial name terbutylazine), C(9)H(16)ClN(5), (I), crystallizes with Z' = 4 in the space group Pca2(1), and equal numbers of molecules adopt two different conformations for the ethylamine groups. The four independent molecules form two approximately enantiomorphic pairs. Eight independent N-H...N hydrogen bonds link the molecules into two independent chains of R(2)(2)(8) rings, in which the arrangement of the alkylamine substituents in the independent molecules precludes any further crystallographic symmetry. The significance of this study lies in its finding of two distinct molecular conformations within the structure and two distinct ways in which the molecules are organized into hydrogen-bonded chains, and in its comparison of the hydrogen-bonded structure of (I) with those of analogous 1,3,5-triazines and pyrimidines.
authors.affiliation: Departamento de Didáctica del las Ciencias, Edificio Humanidades y Ciencias de Educación (D2), Universidad de Jaén, 23071 Jaén, Spain.
authors.forename: Antonio
authors.initials: A
authors.lastname: Quesada
authors.forename: Maria A
authors.initials: MA
authors.lastname: Fontecha
authors.forename: Maria V
authors.initials: MV
authors.lastname: López
authors.forename: John N
authors.initials: JN
authors.lastname: Low
authors.forename: Christopher
authors.initials: C
authors.lastname: Glidewell