ArI(NTf₂)₂: the boundary of oxidative capacity for ArIL₂?

Area of Science:

• Organometallic Chemistry
• Oxidation Chemistry
• Crystallography

Background:

• Aryl-iodine(III) compounds are versatile reagents in organic synthesis.
• The oxidative power of aryl-iodine(III) complexes is tunable via ligand substitution.
• Bistriflimide (NTf2) is a strongly non-coordinating anion with potential to stabilize highly electrophilic iodine species.

Purpose of the Study:

• To synthesize and characterize a novel aryl-iodine(III) complex featuring bistriflimide ligands.
• To evaluate the oxidative capabilities of the new compound in comparison to related species.
• To theoretically assess the compound's position within the spectrum of known aryl-iodine(III) oxidants.

Main Methods:

• Synthesis of NO2-C6H4-I(NTf2)2 via established organometallic routes.
• Single-crystal X-ray diffraction for crystallographic characterization.
• Comparative experimental studies of oxidation reactions.
• Computational analysis using density functional theory (DFT) to determine electronic structure and reactivity.

Main Results:

• Successful synthesis and full crystallographic characterization of NO2-C6H4-I(NTf2)2.
• Demonstrated ability of NO2-C6H4-I(NTf2)2 to perform oxidation reactions unachievable by ArI(OTf)2.
• Theoretical calculations identify Ar-I(NTf2)2 as the most potent oxidant within the ArIL2 class.

Conclusions:

• The novel nitroarene-iodine-bistriflimide compound represents a significant advancement in hypervalent iodine chemistry.
• This compound exhibits superior oxidative power compared to previously studied analogues.
• The findings suggest potential for broader applications in challenging oxidation reactions previously inaccessible.