title: Diethyl piperazine-1,4-diyldioxalate.
abstract: The ethyl oxamate group, N-C(O)-C(O)-OEt, in the title compound, alternatively called diethyl N,N':N,N'-bis(ethylene)dioxamate, C12H18N2O6, can be considered as being composed of two singly bonded amide and ester functionalities. The ethyl oxamate group is not planar. The two carbonyl groups are almost perpendicular, with an oxalyl O=C-C=O torsion angle of -111.34 (17) degrees. The molecule is located on an inversion centre. Infinite supramolecular tapes, propagating along the b axis, are formed through soft C-H...O interactions which form a centrosymmetric R(2)2(12) motif.
authors.affiliation: Unidad Profesional Interdisciplinaria de Biotecnología, Instituto Politécnico Nacional, Avenida Acueducto s/n, Barrio La Laguna Ticomán, México DF 07340, Mexico.
authors.forename: Francisco J
authors.initials: FJ
authors.lastname: Martínez-Martínez
authors.forename: Rodrigo E
authors.initials: RE
authors.lastname: Rojas-Pérez
authors.forename: Efrén V
authors.initials: EV
authors.lastname: García-Báez
authors.forename: Herbert
authors.initials: H
authors.lastname: Höpfl
authors.forename: Itzia I
authors.initials: II
authors.lastname: Padilla-Martínez