Interpnictogen cations: exploring new vistas in coordination chemistry

Area of Science:

• Inorganic Chemistry
• Coordination Chemistry
• P-block Element Chemistry

Background:

• Pnictine derivatives exhibit dual Lewis acid/base behavior.
• Amines and phosphines are common ligands for transition metals and p-block Lewis acids.
• Pnictogen-centered acceptors are key in coordination chemistry.

Purpose of the Study:

• To review recent advancements in pnictogen coordination chemistry.
• To explore the extension of coordination chemistry into the p-block.
• To highlight compounds with enhanced Lewis acidity and homoatomic bonding.

Main Methods:

• Review of literature on pnictine derivatives and p-block Lewis acids.
• Analysis of coordination compounds involving pnictogen centers.
• Discussion of factors influencing Lewis acidity, such as cationic charge.

Main Results:

• Pnictine derivatives can function as both electron donors and acceptors.
• Coordination complexes with p-block Lewis acids, particularly pnictogen-centered ones, have been developed.
• Introduction of cationic charge enhances Lewis acidity of pnictogen centers.
• Compounds with homoatomic coordinate bonding (Pn-Pn and Pn-Pn') and lone pairs at acceptor centers have been synthesized.

Conclusions:

• Coordination chemistry is systematically expanding from transition metals to the p-block.
• Enhanced Lewis acidity in pnictogen centers opens new avenues for complex formation.
• Homoatomic bonding in pnictogen complexes offers unique electronic properties and reactivity.