Manganese(III) complexes with Schiff bases derived from heterocyclic β-diketones and some diamines

Manganese(III) schiff base complexes of the type [Mn(SB)OAc]. H2O ( where SE is derived from 4-benzoyl and 4-acetyl substituted 1-phenyl-3-methyl-2-pyrazolin-5-one and various diamines, viz., ethylenediamine ten), propylenediamine (pn), butylenediamine (bn) and hexylenediamine (hexn) have been prepared and their physicochemical properties studied. They an non-electrolytes in nature and their magnetic moments are close to 4.9 BM indicating spin-free type nature of the complexes and absence of any kind of exchange interaction. From IR, NMR, sind TGA data, presence of it water molecule of crystallization is indicated. Electronic spectra show one charge transfer band and mon than one d-d transitions. On the basis of analytical and physical data, the complexes are suggested to have five coordinated structures with square-pyramidal configuration.