Fe (iii) Complexes of a Pentadentate Ligand Structural Investigation
No Thumbnail Available
Date
2010-06
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa University
Abstract
Two new Fe (III) complexes of two different geometries were synthesized from a
pentadentate ONONO donor ligand. The Schiff base ligand, BNSHIO, Bis-(NSalicylaldehyde)-
1,3-inden-2-one was prepared and analyzed from our laboratory [7, 9,
10]. Ninhydrin, hydrazine hydrate, and salicylaldehyde were the precursors used in
ligand synthesis. This ligand, by direct condensation with Fe(III) resulted in the
formation of a new high spin complex, Fe(III)LD. Another new Fe(III)LT was
synthesized by template method using the same precursors. Initially 1,3-Dihydrazonoinden-
2-one (DHIO) was prepared by condensing ninhydrin with hydrazine hydrate,
which was treated with Fe(III) and salicylaldehyde and refluxed. This resulted in a low
spin complex, Fe (III)LT. The ligand to metal ratio was found to be 1:1 in both
complexes. Fe (III)LT was found to be a cationic complex and Fe(III)LD was found to
be a neutral complex. Based on the analytical, conductance, spectral, magnetic
susceptibility, AAS, and UV-Vis, data, Fe (III)LD was proposed to have an octahedral
geometry and Fe(III)LT was proposed a trigonal bipyramidal geometry. In both
complexes, the ligand behaves as a pentadentate ONONO donor.
Key words: Schiff bases, Ninhydrin, hydrazine hydrate, Salicylaldehyde, pentadentate
ONONO donor, Bis-(N-salicylaldehyde)-1,3-dihydrazono-inden-2-one
(BNSDHIO),1,3-dihydrazono-inden-2-one(DHIO)
Description
Keywords
Schiff bases; Ninhydrin; hydrazine hydrate; Salicylaldehyde; pentadentate ONONO donor; Bis-(N-salicylaldehyde)-1;3-dihydrazono-inden-2-one (BNSDHIO);1;3-dihydrazono-inden-2-one(DHIO)