Cationic nickel porphyrinoids with unexpected reactivity

Area of Science:

• Coordination Chemistry
• Organometallic Chemistry
• Catalysis

Background:

• Porphyrinoids are versatile macrocyclic compounds with diverse applications.
• Corrins are a class of related macrocycles known for their biological significance.
• Developing new porphyrinoid structures is crucial for expanding their catalytic potential.

Purpose of the Study:

• To synthesize novel cationic nickel(ii) complexes with unique ring-contracted porphyrinoid ligands.
• To investigate the electrochemical properties of these new metal complexes.
• To evaluate their efficacy as catalysts in carbon-carbon cross-coupling reactions.

Main Methods:

• Metal-templated macrocyclization was employed for ligand synthesis.
• Electrochemical techniques were used to study electron transfer processes.
• Catalytic activity was assessed in C-C cross-coupling reactions.

Main Results:

• Two novel ring-contracted porphyrinoid ligands were successfully synthesized.
• Cationic nickel(ii) complexes of these ligands were prepared.
• The complexes exhibited reversible electron transfer behavior.
• These complexes demonstrated catalytic activity in C-C cross-coupling, marking a first for porphyrinoid-based systems.

Conclusions:

• The successful synthesis of novel porphyrinoid ligands and their nickel(ii) complexes.
• Demonstration of reversible electron transfer in these new compounds.
• Establishment of the first porphyrinoid-based catalytic system for C-C cross-coupling.