Exam 7: Alkenes and Alkynes I

An unknown compound,B,has the molecular formula C₇H₁₂.On catalytic hydrogenation 1 mol of B absorbs 2 mol of hydrogen and yields 2-methylhexane.B has significant IR absorption band at about 3300 and 2200 cm^-1.Which compound best represents B?

Which mechanism best describes the chemical process shown below?

Which structure represents (Z)-1,4-dichlorohex-3-en-1-yne?

When diastereomers I and II undergo an E2 elimination on treatment with sodium ethoxide in ethanol,one of the isomers react 500 times faster than the other one.Also,one isomer gives only A as a product and the other isomer gives a mixture of A and B as products.Determine the products of each isomer and explain your reasoning.

What would be the major product(s)of the following reaction?

Treating (CH₃)₃C-Cl with a mixture of H₂O and CH₃OH at room temperature would yield:

Which would be the major product of the following reaction?

The correct IUPAC name for the following compound is:

Which would be the major product of the following reaction sequence?

Which would be the major product of the following reaction sequence?

Carbocations have three options available for further reaction.These options include reaction with a nucleophile,loss of a beta proton to give an alkene,and ___.

Complete the following reaction sequence,providing a brief rationale for your answer.

Give a detailed reaction mechanism for the reaction expected to occur when 2-bromo-2-methylpentane is heated with methanol.Draw clear structural formulas of all relevant species and use curved arrows to represent electron flow.Also indicate which step is likely to be rate-determining.

Reaction of sodium ethoxide with 1-bromopentane at 30 ^$\circ$ C yields primarily:

Treating 1-bromo-1-methylcyclohexane with CH₃OH at room temperature would yield:

Which mechanistic step in the acid-catalyzed dehydration of 3,3-dimethyl-2-butanol is the rate determining step?

What is the major product of the reaction of the following reaction?

Concerning the relative stabilities of alkenes,which is a false statement?

What would be the major product(s)of the following reaction?

What will be the major product of the following reaction?