Rhenium(V)-oxo corrolazines: isolating redox-active ligand reactivity

Area of Science:

• Organometallic Chemistry
• Coordination Chemistry
• Materials Science

Background:

• Metallocorrolazines are a class of porphyrinoid complexes with diverse applications.
• Third-row transition metal complexes offer unique electronic and catalytic properties.
• Understanding ligand-based reactivity is crucial for designing new functional molecules.

Purpose of the Study:

• To report the synthesis and characterization of the first third-row metallocorrolazine.
• To investigate the reactivity of this novel rhenium-porphyrinoid complex.
• To explore the potential of the oxidized complex in chemical transformations.

Main Methods:

• Single crystal X-ray diffraction for structural characterization.
• Reactions with strong acids and oxidizing agents to probe reactivity.
• Electrochemical or chemical oxidation to generate the one-electron oxidized species.

Main Results:

• Successful synthesis and full characterization of a third-row (Re) metallocorrolazine.
• The complex displays exclusive ligand-based reactivity towards acids and oxidants.
• The one-electron oxidized π-radical-cation exhibits hydrogen-atom abstraction capabilities.

Conclusions:

• This work presents a new class of third-row metallocorrolazine complexes.
• The observed reactivity highlights the potential for catalytic applications.
• The H-atom abstraction ability opens avenues for synthetic transformations.