ChemInform Abstract: Reactivity of Pentacoordinate Ferrous Porphyrins with Exo-Bidentate Nitrogenous Bases. Mononuclear and Binuclear Complexes in Dynamic Equilibrium.
Abstract
The spectroscopically and electrochemically monitored reaction of thiocarbonyl-tetraphenylporphinatoiron(II) with the bidentate nitrogenous bases pyrazine, 2,2'-bipyridine, 1,2-bis(4-pyridyl)ethane or -ethene and 1,4-diazabicyclo(2.2.2)octane in halocarbon solvents affords six-coordinate monomeric and binuclear base-bridged porphyrin complexes in dynamic equilibrium.
ChemInform Abstract
The spectroscopically and electrochemically monitored reaction of thiocarbonyl-tetraphenylporphinatoiron(II) with the bidentate nitrogenous bases pyrazine, 2,2'-bipyridine, 1,2-bis(4-pyridyl)ethane or -ethene and 1,4-diazabicyclo(2.2.2)octane in halocarbon solvents affords six-coordinate monomeric and binuclear base-bridged porphyrin complexes in dynamic equilibrium. Within the potential limits of the solvent/supporting electrolyte system, each complex undergoes at least four separate electron-transfer reactions with retention of the CS ligand. An electron-transfer pathway is proposed.
