Abstract
The chemistry of carbon monoxide (CO) as a ligand has evolved significantly and transition-metal carbonyl complexes have been widely used as catalysts in many important catalytic processes. Here the authors comment on the recent progress of main-group element carbonyl complexes along with their future prospects.
Highlights
The chemistry of carbon monoxide (CO) as a ligand has evolved significantly and transition-metal carbonyl complexes have been widely used as catalysts in many important catalytic processes
TMs are known to react with CO to form TM carbonyl complexes with various types of TM–CO bonding motifs, e.g., terminal, bridging, and isocarbonyl
The most common TM carbonyl complexes contain terminal CO bonds, which consists of σ-donation from CO lone pair to an empty orbital on the TM and πbackdonation from a filled d orbital of the TM to an empty π*-orbital on CO
Summary
The chemistry of carbon monoxide (CO) as a ligand has evolved significantly and transition-metal carbonyl complexes have been widely used as catalysts in many important catalytic processes. The chemistry of main-group carbonyl complexes has garnered increased attention. The formation of carbonyl complexes by the simple reaction with CO is very rare for main-group elements, due to the lack of suitable π-back-bonding orbitals, some milestone advances in main-group carbonyl chemistry have been recently reported.
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