Question

what are metal carbonyles​

Answer 1

Answer:

Metal carbonyls are coordination complexes of transition metals with carbon monoxide ligands. Metal carbonyls are useful in organic synthesis and as catalysts or catalyst precursors in homogeneous catalysis, such as hydroformylation and Reppe chemistry.

Answer 2

Explanation:

Till now we have come across many complex compounds that contain carbonyl ligands only. These compounds are better termed as homoleptic carbonyls or metal carbonyls. Most of the transition metals are known to form homoleptic carbonyls or metal carbonyls which have simple, well-defined structures. For example tetrahedral, octahedral etc. In a metal carbonyl, the metal-carbon bond possesses both σ and π character. The bond between the carbonyl molecule and the metal is further strengthened by the synergic effect produced by the metal-ligand bond. The two types of bonding that exist in metal carbonyls are explained below:

Structure of Metal Carbonyls:

Due to the donation of electrons by the carbonyl molecules to the vacant orbitals of the metal, a metal-carbon σ bond is formed.

Due to the donation of a pair of electrons from a filled d orbital metal into the vacant antibonding π* orbital of carbonyl ligand, a metal-carbon π bond is formed.