Organic Chemistry Practice Exam 8

The video tutorial covers IUPAC nomenclature for alkenes, focusing on cyclic compounds and stereochemistry. It explains elimination reactions, particularly the formation of Hoffman products using tert-butoxide. The role of deuterium in hydrogenation reactions is discussed, highlighting sin addition and stereochemistry. The geometry of phosphorus tribromide is analyzed, including electron domain and molecular geometry. The hybridization of oxygens in esters is explored, emphasizing SP3 and SP2 character. The tutorial concludes with a detailed IUPAC naming of alkenes, considering stereochemistry and E/Z configuration.

What is the parent chain in the given cyclic alkene?

• Cyclopentane

• Pentane

• Hexane

• Cyclohexane

Which rule is used to assign priority in stereochemistry?

• Zaitsev's Rule

• Hammond's Postulate

• Markovnikov's Rule

• Cahn-Ingold-Prelog Priority Rules

What type of reaction is used to form alkenes from alkyl bromides?

• Substitution

• Hydrolysis

• Addition

• Elimination

Which base is typically used to obtain the Hofmann product?

• Sodium hydroxide

• Ammonia

• Lithium aluminum hydride

• Tert-butoxide

What is deuterium?

• A type of carbon

• An isotope of oxygen

• An isotope of hydrogen

• A type of nitrogen

In a syn addition reaction, how are the added atoms oriented?

• Trans to each other

• Cis to each other

• Randomly oriented

• Opposite sides

What is the electron domain geometry of phosphorus tribromide?

• Tetrahedral

• Trigonal planar

• Linear

• Trigonal bipyramidal

What is the molecular geometry of phosphorus tribromide?

• Bent

• Linear

• Trigonal pyramidal

• Tetrahedral

What is the predominant hybridization of the carbonyl oxygen in an ester?

• sp

• sp3d

• sp2

• sp3

What is the hybridization of the oxygen atom bonded to the carbonyl carbon in an ester?

• sp

• sp2

• sp3

• sp3d