MANGANESE (III) COMPLEXES OF 1, 8-BIS (SALICYLIDENEAMINO)- 3,6-DUMINOCTANE

Abstract

Manganese (III) complexes of bivalent hexadentante Schiff base, triethylene-tetramine-bissalicylaldehyde, trien-sal, having the composition [Mn (trien-sal] X, where X=ClO4-, NO3-, NCS-, Br- or I-) have been prepared and their physic-chemical properties studied. The molar conductances of the complexes show that they are 1:1 electrolytes in acetone, indicating the non-coordinated nature of the anions. Their normal mangnetic moments of about 4.85 B.M. show them to be spin-free type whith four unpaired electrons. Their infrared spectra show that the secondary amino groups of the ligand also coordinate to the metal ion, making the ligand hexacoordinating. It is suggested that the complexes have tetragonally distorted octahedral structure. The electronic spectra of the complexes agree with this assignment.