Organometallic Reactions Part 4: Migratory Insertions

The video tutorial covers various organometallic reactions, focusing on migratory insertion, where ligands insert into metal-ligand bonds. It explains the reversibility of insertion, the role of π bonds, and provides examples with iron and tungsten complexes. The tutorial also explores alternative migration types like hydro metallation and polymerization, discusses complex stability, and examines mechanistic steps in catalytic cycles.

What is a key requirement for migratory insertion to occur between two ligands?

• The ligands must be identical.

• The ligands must be cis to each other.

• The ligands must be trans to each other.

• The ligands must be in different coordination spheres.

Which type of bond is most commonly involved in migratory insertion?

• Hydrogen bond

• π bond

• Ionic bond

• Sigma bond

In the example of an iron complex, what makes the insertion irreversible?

• The presence of a strong ligand

• The absence of π bonds

• The presence of a weak ligand

• The absence of a coordination site

What happens during hydro metallation?

• A metal forms a bond with a nitrogen atom.

• An alkene forms a π bond with a metal.

• A hydride migrates to a carbon atom.

• A hydride migrates to a metal center.

What is the result of repeated insertion of ethene into a metal-carbon bond?

• Formation of a metal oxide

• Formation of a polymer

• Formation of a single alkyl ligand

• Formation of a metal hydride

What is the electron count of a stable square planar platinum complex?

• 18 electrons

• 16 electrons

• 14 electrons

• 20 electrons

What type of reaction involves the loss of a ligand and a hydride from a complex?

• Oxidative addition

• Migratory insertion

• Ligand association

• Reductive elimination