title: Dibenzyl 3,3',4,4'-tetra-methyl-5,5'-(ethynedi-yl)bis-(pyrrole-2-carboxyl-ate).
abstract: The title mol-ecule, C(30)H(28)N(2)O(4), has crystallographic twofold rotation symmetry, with the pyrrole planes forming a dihedral angle of 40.49 (4)°. The pyrrole N-H donor and adjacent ester carbonyl acceptor form R(2) (2)(10) hydrogen-bonded rings about inversion centers, leading to chains of hydrogen-bonded mol-ecules along [001].
authors.affiliation: Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803-1804, USA.
authors.forename: Hillary K
authors.initials: HK
authors.lastname: Tanui
authors.forename: Frank R
authors.initials: FR
authors.lastname: Fronczek
authors.forename: M Graça H
authors.initials: MG
authors.lastname: Vicente