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Exam 7: Structure and Synthesis of Alkenes; Elimination

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Question 61

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Using Zaitsev's rule, choose the most stable alkene among the following.

A) hex-1-ene
B) (E) -hex-2-ene
C) (Z) -hex-2-ene
D) They are all of equal stability according to Zaitsev's rule.

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Question 62

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Provide the proper IUPAC name for the alkene shown below.

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(E)-3,4-di...

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Question 63

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Draw all likely alkene products in the following reaction and circle the product you expect to predominate.

Provide a structure for (Z)-4-bromo-3-heptene.

Provide the proper IUPAC name for the alkene shown below.

Which of the following best describes the geometry about the carbon-carbon double bond in the alkene below?

The trans isomers of cycloalkenes with rings containing fewer than ________ atoms are unstable at room temperature.

3-Methylpentane can be dehydrogenated to form an alkene with molecular formula of C₆H₁₂. What is the most stable alkene that could be formed? Name it with the appropriate stereochemical designator.

A chemist has isolated a new natural product and determined its molecular formula to be C₂₄H₄₀O₄. In hydrogenation experiments the chemist found that each mole of the natural product reacted with two moles of H₂. How many rings are present in the structure of the new natural product?

Which has the smaller heat of hydrogenation, (E)-2-pentene or (Z)-2-pentene? What is the structural origin of this difference?

Draw an acceptable structure for 1,2-dimethylcyclohexene.

Dehydrohalogenation of an alkyl halide by treating it with a strong base to yield an alkene product typically occurs by what reaction mechanism?

Consider the constitutional isomers 2-methylbut-1-ene, 2-methylbut-2-ene, and 3-methylbut-1-ene. When each of these alkenes is subjected to catalytic hydrogenation (H₂, Pt) , a single product results. Which of the following best describes the structural relationship among these products?

Draw all likely products of the following reaction and circle the product you expect to predominate. CH₃CH(OH)CH₂CH₂CH₃

Draw the structure of polyethylene.

Why is rotation about the carbon-carbon double bond in alkenes prohibited while relatively free rotation can occur about the carbon-carbon single bond in alkanes?

Identify the correct name for the following structure.

Predict the major product of the reaction shown below.

Which of the following compounds is an E isomer?

Provide the structure of the major organic product of the reaction below.