Template Synthesis and Structural Characterization of Homo Binuclear Chromium(III), Manganese(III), Iron(III), Cobalt(III), and Ruthenium(III) Complexes with Octaazamacrocyclic Ligands

Authors : Vinod K. SHARMA, Shipra SRIVASTAVA

Pages : 755-767

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Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The Schiff base octaazamacrocyclic ligands derived from primary diamines and 3,6-dimethyl/diphenyl-4,5-diazaocta-3,5-diene-2,7-dione, and their binuclear complexes [M2LCl4]Cl2 [M = Crinsert ignore into journalissuearticles values(III);, Feinsert ignore into journalissuearticles values(III);, Coinsert ignore into journalissuearticles values(III);, or Ruinsert ignore into journalissuearticles values(III);] and [Mn2Linsert ignore into journalissuearticles values(AcO);4]insert ignore into journalissuearticles values(AcO);2 were synthesized by template condensation reactions. Attempts to synthesize the corresponding metal-free macrocyclic ligands did not prove successful. The overall geometry and stereochemistry of these complexes were elucidated by elemental analyses, magnetic susceptibilities, electronic spectra, infrared spectra, molar conductance measurements, 1H NMR, and thermogravimetric analysis. All the trivalent metal ion complexes appear to be 1:2 electrolytes. An octahedral geometry is proposed for all the complexes.
Keywords : Synthesis, chromium, manganese, iron, cobalt, ruthenium, macrocycles