title: 2-[2-(pyrrolidin-2-yl)propan-2-yl]-1H-pyrrole and its amide derivative 1-{2-[2-(1H-pyrrol-2-yl)propan-2-yl]pyrrolidin-1-yl}ethanone.
abstract: In the title compounds, C(11)H(18)N(2), (II), and C(13)H(20)N(2)O, (III), the pyrrolidine rings have twist conformations. Compound (II) crystallizes with two independent molecules (A and B) in the asymmetric unit. The mean planes of the pyrrole and pyrrolidine rings are inclined to one another by 89.99 (11) and 89.35 (10)° in molecules A and B, respectively. In (III), the amide derivative of (II), the same dihedral angle is much smaller, at only 13.42 (10)°. In the crystal structure of (II), the individual molecules are linked via N-H...N hydrogen bonds to form inversion dimers, each with an R(2)(2)(12) graph-set motif. In the crystal structure of (III), the molecules are linked via N-H...O hydrogen bonds to form inversion dimers with an R(2)(2)(16) graph-set motif.
authors.affiliation: Institute of Chemistry, University of Neuchâtel, Neuchâtel, Switzerland.
authors.forename: Guillaume
authors.initials: G
authors.lastname: Journot
authors.forename: Reinhard
authors.initials: R
authors.lastname: Neier
authors.forename: Helen
authors.initials: H
authors.lastname: Stoeckli-Evans