Why is gasoline often called "unleaded fuel"?

• It contains no lead, which was previously added to prevent engine knock.

• It has a lighter weight than leaded fuel.

• It is a newer type of fuel that doesn't require lead.

• It is safer to handle than leaded fuel.

What defines an organometallic compound?

• It is a compound that contains only carbon and hydrogen.

• It is an organic compound with a carbon-metal bond.

• It is a metal compound used in organic reactions.

• It is a compound found only in living organisms.

Why must water be kept away from Grignard reagents?

• Water makes the reagent less flammable.

• Grignard reagents react with acidic hydrogens in water to produce unwanted alkanes.

• Water helps to speed up the reaction, making it too fast.

• Water causes the Grignard reagent to solidify.

What is a key characteristic of both Grignard and organolithium reagents?

• They are strong acids.

• They are weak bases.

• They are strong bases and proton acceptors.

• They are only used in industrial settings.

What type of bond is formed when an organolithium reagent reacts with a carbonyl compound?

• Carbon-oxygen bond

• Carbon-hydrogen bond

• Carbon-carbon bond

• Lithium-oxygen bond

When an organolithium reagent attacks an epoxide, which carbon atom is typically targeted?

• The most substituted carbon

• The least substituted carbon

• The oxygen atom

• Any carbon atom equally

Compared to Grignard and organolithium reagents, how do Gilman reagents generally behave in chemical reactions?

• They are much more reactive.

• They are less reactive and more selective.

• They only react with oxygen.

• They cause more elimination reactions.

What type of reaction are Gilman reagents particularly useful for, where two alkyl fragments are joined together?

• Elimination reactions

• Oxidation reactions

• Cross-coupling reactions

• Hydrolysis reactions