104013-71-0Relevant academic research and scientific papers
Synthesis, characterization, and electrochemistry of indium(III) porphyrins that contain a stable indium-carbon σ bond
Tabard,Guilard,Kadish
, p. 4277 - 4285 (2008/10/08)
The syntheses and spectroscopic properties of a new series of σ-bonded indium porphyrins are reported, and their electrochemical behavior is characterized in different solvents containing 0.1 M tetrabutylammonium hexafluorophosphate as supporting electrolyte. Perfluoroaryl groups (C6F4H and C6F5) were σ-bonded to indium(III) complexes containing four different types of porphyrin rings. Each neutral complex was characterized by 1H NMR, 19F NMR, IR, and UV-visible spectroscopy. All of the complexes could be oxidized or reduced by multiple single-electron transfers. Two reversible reductions were observed in nonaqueous media and corresponded to ring-centered reactions, the first of which generated a stable [(P)In(C6F4X)]?- radical anion. The compounds could also be oxidized by two one-electron abstractions, but unlike previously described σ-bonded alkylindium (or arylindium) porphyrins, no cleavage of the σ bond occurred following the first oxidation; i.e., the generated radical cations were stable. These two oxidations were shown to be centered at the porphyrin π-ring system. The electrochemistry and spectroscopic properties of the new σ-bonded indium porphyrins were compared with those of other types of indium σ-bonded complexes.
