Download citation
Download citation

link to html
The title isomers, namely 3-chloro-N-[1-(1H-pyrrol-2-yl)ethyl­idene]aniline, (I), and 4-chloro-N-[1-(1H-pyrrol-2-yl)ethyl­idene]aniline, (II), both C12H11ClN2, differ in the position of the chlorine substitution. Both compounds have the basic imino­pyrrole structure, which shows a planar backbone with similar features. The dihedral angle formed by the planes of the pyrrole and benzene rings is 75.65 (7)° for (I) and 86.56 (8)° for (II). The H atom bound to the pyrrole N atom is positionally disordered and partial protonation occurs at the imino N atom in (I), while this phenomenon is absent from the structure of (II). Packing inter­actions for both compounds include inter­molecular N—H...N hydrogen bonds and C—H...π inter­actions, forming centrosymmetric dimers for both (I) and (II).

Download citation
Download citation

link to html
The title complex is composed of two deprotonated N,N′-bidentate 2-[(phenyl­imino)­ethyl]-1H-pyrrol-1-ide ligands around a central NiII cation, with the pyrrolide rings and imine groups lying trans to each other. Mol­ecules are linked into simple chains by two C—H...π hydrogen bonds, one of which is inter­molecular with a phenyl β-C atom as donor, while the other is intra­molecular with a pyrrole β-C atom as donor.

Download citation
Download citation

link to html
Two basic heterocyclic imino structures display a planar backbone with similar features, but differ in the heterocyclic atoms located in the five-membered rings, i.e. N and S. In the pyrrole, centrosymmetric imino­pyrrole dimers are assembled by means of two inverted N—H...N hydrogen bonds and two inverted C—H...π inter­actions. In the thio­phene, however, mol­ecules are linked by nonclassical C—H...N hydrogen bonds in which the mol­ecules play the roles of both hydrogen-bond donors and acceptors, resulting in one-dimensional supra­molecular chains.
Follow Acta Cryst. C
Sign up for e-alerts
Follow Acta Cryst. on Twitter
Follow us on facebook
Sign up for RSS feeds