The syntheses of bis[N,N"-alkylene-2,2'-(phenylmethylene) bis(3,4- dimethylpyrrole-5-aldimino)] dimetallic complexes M2L[alkylenes=1,2- ethylene, 1,3-propylene, 1,4-butylene; M=Mn(Ⅱ), Fe(Ⅲ)cl] are first described. Their spectral characters and configurations are also discussed. The dimetallic complexes were prepared by reaction of appropriate metal salts with a series of Schiff base mononuclear complexes derived by reaction of Schiff base ligands with appropriate metal salts and alkylenediamine. The Schiff base ligands were prepared from the [1+2] condensation of appropriate alkylenediamine with 2,2'-(phenylmethylene)bis(3,4-dimethylpyrrole- 5-carboxaldehyde).

Key words: SCHIFF BASE, MANGANESE COMPLEX, IRON COMPLEX, DINUCLEAR COMPLEX, SPECTRAL CHARACTERISTICS, SYNTHESIS METHODS, PYRROLE P