{2,2′-[1,1′-(4-Azaheptane-1,7-diyldinitrilo)diethylidyne]diphenolato}copper(II)

Abstract

The quinquedentate ligand 2,2'-[1,1'-(4-azaheptane-1,7-diyldinitrilo)diethylidyne]diphenol in the title compound, [Cu(C22H27N3O2)], furnishes an N3O2 donor set, which results in a distorted square-pyramidal coordination; the two O and two imine N atoms lie in the basal plane, while the secondary amine N atom of the ligand occupies the axial position. The axial Cu-N bond is 0.33 A longer than the average of the equatorial bonds, and the O atoms are trans. The symmetry of the molecule is lowered by the twist-boat and chair conformations adopted by the two CuNN chelate rings. The complex contains two intramolecular C-H...O interactions, and two molecules of the complex are linked into a dimer by means of moderate N-H...O hydrogen bonds. Spectroscopic evidence supports the presence of hydrogen bonds.

{2,2′-[1,1′-(4-Azaheptane-1,7-diyldinitrilo)diethylidyne]diphenolato}(pyridine)cobalt(III) hexafluorophosphate

“…The properties of these complexes can be modified by the structural modification of the pentadentate Schiff base and by the nature of the ligand occupying the sixth coordination site. We have recently reported the structure of some Ni II and Cu II complexes of (Me-sal) 2 dpt (Morshedi et al, 2006;Amirnasr et al, 2006). In this context, we report here the synthesis and structure of the title compound, [Co III {(Mesal) 2 dpt}(py)]PF 6 , (I).…”