ELECTROCEMICAL STUDY OF SYM. POLYMETHYLFERROCENE/SYM. POLYMETHYLFERRICINIUM (MenFc/MenFc+) (n = 6, 8, 10) REDOX SYSTEMS IN ORGANIC SOLUTIONS

Redox systems MenFc/MenFc+ (n=6, 8, 10) consisting of symmetric polymethylferrocene and the corres-pon¬ding polymethylferricinium cation have been studied by cyclic voltammetry in organic solvents - acetonitrile, dichloromethane dimethylsulfoxide. The values diffusion coefficient reagents (MenFc MenFc+) redox calculated Randles-Sevcik equation, which are consistent with conclusion that "a one-electron reversible electrochemical reaction is determined reagents". features change coefficient, both sequence Fc/Fc+→Me6Fc/Me6Fc+→ Me8Fc/Me8Fc+ → Me10Fc/Me10Fc+ dependence on presence or absence charge reagents, interpreted volume (dimensions) increasing number methyl groups interaction cations electrolyte anions solution.The fact each system very close to molecule, allows us replace standard electrode potential (Eo) half-wave (E1/2) according Nernst equation. effect nature solvent value these has studied. It shown appearance cyclopentadienyl rings significantly weakens (especially iron atom) molecules, comparison Fc/Fc+ and, as a result, their less affected surrounding medium – molecules ions