Compartmental Ligands. Part 10. Syntheses and Crystal and Molecular Structures of the Copper(II) Complexes of Schiff Bases derived from 1-(Pyrrol-2-yl)butane-1,3-dione and 1,3-Bis-(2-aminophenoxy)propane, and from Pyrrole-2-carbaldehyde and 3,6-Dioxaoctane-1,8-diamine

Article abstract of DOI:10.1039/DT9840002741

The synthesis of the acyclic Schiff bases H4L⁷ and H2L⁸, derived from 1-(pyrrol-2-yl)butane-1,3-dione and 1,3-bis(2-aminophenoxy)propane, and from pyrrole-2-carbaldehyde and 3,6-dioxaoctane-1,8-diamine, respectively are reported, together with their respective copper(II) complexes.Crystals of 7)> are monoclinic; R = 0.0549 for 1901 observed reflections.The copper is co-ordinated in the inner (N2O2) compartment with a trans mode of attachment by the ligand; the approximately square-planar co-ordination geometry shows a significant tetrahedral distortion.The pyrrole and ether functions are not bonded to the copper.In the structure of 8)(O2CMe)> (R = 0.0363, 4800 reflections), the co-ordination geometries of the copper atoms in the two independent molecules are tetragonally-distorted octahedral, the two long axial bonds being to one acetate oxygen and to one of the ether oxygen atoms; one pyrrole residue is not co-ordinated to copper.