Organic Chemistry Practice Exam 1

The video tutorial covers organo cuprates, Grignard reagents, radical bromination, and hydrogenation of alkenes and alkynes. It explains the preparation and reactions of these compounds, including the regioselectivity of bromination and the stability of cyclic molecules. The tutorial also includes multiple choice questions on molecular stability and IUPAC naming.

What is the primary role of an organo cuprate in a reaction?

• To deliver an alkyl nucleophile

• To stabilize a carbocation

• To form a radical intermediate

• To act as an electrophile

In the preparation of a Grignard reagent, what is the role of magnesium?

• To insert into a carbon-carbon bond

• To stabilize a carbocation

• To insert into a carbon-halogen bond

• To act as a leaving group

Why are bromine radicals more regioselective than chlorine radicals?

• Bromine radicals are more stable

• Bromine radicals are less stable

• Chlorine radicals are more reactive

• Chlorine radicals are larger

What is the main reason cyclobutane is less stable than cyclohexane?

• Hyperconjugation

• Torsional strain

• Angle strain

• Steric hindrance

How many electrons can occupy a molecular orbital?

• Four

• One

• Two

• Three

What type of bond breaking is associated with radical formation?

• Heterolysis

• Covalent cleavage

• Homolysis

• Ionic cleavage

In IUPAC naming, what is the first step in identifying a compound?

• Identifying the stereochemistry

• Identifying the substituents

• Identifying the longest carbon chain

• Identifying the functional group