Solvent effects on the redox potentials of tetraethylammonium hexacyanomanganate(III) and hexacyanoferrate(III)

摘要: Abstract Tetraethylammonium hexacyanomanganate(III) was studied in formamide, N-methylformamide, methanol, propylenecarbonate, N,N-dimethylthioformamide, N-methylthiopyrrolidinone(2), butyrolactone, acetonitrile, dimethylsulfoxide, N,N-dimethylformamide, N-methylpyrrolidinone(2), nitromethane and tetramethylenesulfone employing polarographic voltammetric techniques. Reversible or nearly reversible behaviour for the reaction Mn(CN) 6 3− /Mn(CN) 2− observed most solvents on stationary platinum electrode. The 4− both dropping mercury electrode Besides several anodic waves due to successive reactions of with cyano-ligand complex occurred at No redox (et 4 N) 3 found nitromethane. tetraethylammonium hexacyanoferrate(III) N-methylpyrrolidinone(2) butyrolactone. variation E 1/2 ( pa + pc ) values versus bisphenylchromium(I)/bisbiphenylchromium(0) as reference system processes , Fe(CN) /Fe(CN) nature solvent is discussed within donor-acceptor concept. Correlations between 1/2( acceptor properties have been observed. preparation tetraethyl- tetrabutylammonium described.