Oxidative Addition in Coordination Chemistry

The video tutorial introduces oxidative addition, a key organometallic reaction where new ligands attach to a metal, altering its oxidation state. It explains the mechanism, highlighting cis-concerted and stepwise oxidative additions, with examples involving molecular hydrogen and methyl iodide. The tutorial also covers common bonds involved, such as H-H and Si-H, and notes limitations like d0 metals' inability to participate. Examples illustrate potential stereoisomers and emphasize the importance of electron count in reactions.

What is a key requirement for a metal to undergo oxidative addition?

• The metal must have a stable oxidation state.

• The metal must be in a gaseous state.

• The metal must be a noble gas.

• The metal must be radioactive.

In a concerted oxidative addition, how do the ligands typically arrange themselves?

• In a linear fashion

• Randomly

• Cis to each other

• Trans to each other

Which type of bond is most commonly involved in concerted oxidative addition?

• Nonpolar bonds

• Ionic bonds

• Polar bonds

• Metallic bonds

What role does the dz2 orbital play in oxidative addition involving an iridium complex?

• It donates electron density to the ligands.

• It remains inactive during the reaction.

• It projects lobes along the axis with open coordination sites.

• It forms a covalent bond with the ligands.

In stepwise oxidative addition, which part of the polar molecule does the metal interact with first?

• The less electronegative end

• The center of the molecule

• The more electronegative end

• The entire molecule at once

What is a characteristic of the intermediate formed in stepwise oxidative addition?

• It is always neutral.

• It has a lower oxidation state than the original metal.

• It is highly unstable and decomposes immediately.

• It has a formal charge one greater than before.

Which type of bond is more challenging to activate but is synthetically important?

• C-H bonds

• C-C bonds

• N-H bonds

• O-H bonds

Why can't d0 metals participate in oxidative addition?

• They have no d electrons to lose.

• They are too large.

• They are already fully oxidized.

• They are too reactive.

What happens to the oxidation state of the metal after oxidative addition?

• It decreases by 2.

• It remains the same.

• It decreases by 1.

• It increases by 2.

Which of the following bonds is NOT commonly involved in oxidative addition?

• C-C bonds

• N-H bonds

• Sn-Sn bonds

• B-B bonds