Question 1

Draw an acceptable structure for 4-phenylbut-1-ene.

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Question 2

Provide the proper IUPAC name for the alkene shown below.

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Question 3

Which of the following alkenes can show geometric isomerism: 2,3-dichloro-2-pentene, 4-chloro-3-ethyl-3-hexene, 3-chloro-2-methyl-2-butene, and 3-chloro-2-methyl-1-butene?

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Question 4

Draw an acceptable structure for 4-ethylhept-1-ene.

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Question 5

Provide the proper IUPAC name for the alkene shown below.

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Question 6

Name the alkene shown. Be sure to include the appropriate E or Z label necessary.

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Question 7

If a certain hydrocarbon molecule has 10 carbons atoms, one ring and two triple bonds, how many hydrogens does it have?
A) 10
B) 12
C) 14
D) 16
E) 18

Accepted Answer

The hydrocarbon in question follows the general formula for calculating hydrogen atoms in a hydrocarbon, which is CnH2n+2 for alkanes. However, since this molecule has a ring and two triple bonds, we need to adjust this formula. Each ring or triple bond acts like a degree of unsaturation, reducing the number of hydrogen atoms by 2 for each. Therefore, starting with an alkane base of C10H22, we subtract 2 hydrogens for the ring and 4 hydrogens for the two triple bonds (2 for each), resulting in C10H16. However, since triple bonds actually reduce the hydrogen count by 4 per bond (not 2, as initially calculated), we need to correct the calculation: Starting again from C10H22, subtracting 2 for the ring and 8 for the two triple bonds (4 for each) gives us C10H12.

Question 8

Identify the correct name for the following structure. 
A) 3-methoxy-5-methylcyclohepta-1,5-diene
B) 6-methoxy-1-methylcyclohepta-1,4-diene
C) 7-methoxy-5-methylcyclohepta-1,4-diene
D) 4-methoxy-2-methylcyclohepta-1,5-diene

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Question 9

Name the compound shown below.

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Question 10

Draw and name the six alkenes which have the molecular formula C₅H₁₀.

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Question 11

Provide an acceptable name for (CH₃)₂CHCH=C(CH₃)CH₂CH₃.

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Question 12

Provide the proper IUPAC name for the alkene shown below. CH₂ CHCH₂CH₂CH₂CH₃

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Question 13

Draw and name all alkenes which have the molecular formula C₄H₈.

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Question 14

Provide a correct IUPAC name for the structure below.

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Question 15

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? A) 2 B) 3 C) 4 D) 5 E) 6

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Question 16

Provide the proper IUPAC name for the alkene shown below.

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Question 17

For which of the following alkenes will cis- and trans- isomers not exist? 
A) a) only
B) b) only
C) both a) and c)
D) d) only
E) both c) and d)

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Question 18

Provide an acceptable name for (CH₃CH₂)₂CHCH₂CH=CH₂.

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Question 19

Draw an acceptable structure for 1,2-dimethylcyclohexene.

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Question 20

How many elements of unsaturation are implied by the molecular formula 
A) 0
B) 1
C) 2
D) 3
E) 4

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Quiz 7: Structure and Synthesis of Alkenes; Elimination

Draw an acceptable structure for 4-phenylbut-1-ene.

Provide the proper IUPAC name for the alkene shown below.

Which of the following alkenes can show geometric isomerism: 2,3-dichloro-2-pentene, 4-chloro-3-ethyl-3-hexene, 3-chloro-2-methyl-2-butene, and 3-chloro-2-methyl-1-butene?

Draw an acceptable structure for 4-ethylhept-1-ene.

Provide the proper IUPAC name for the alkene shown below.

Name the alkene shown. Be sure to include the appropriate E or Z label necessary.

If a certain hydrocarbon molecule has 10 carbons atoms, one ring and two triple bonds, how many hydrogens does it have?

Identify the correct name for the following structure.

Name the compound shown below.

Draw and name the six alkenes which have the molecular formula C5H10.

Provide an acceptable name for (CH3)2CHCH=C(CH3)CH2CH3.

Provide the proper IUPAC name for the alkene shown below. CH2 CHCH2CH2CH2CH3

Draw and name all alkenes which have the molecular formula C4H8.

Provide a correct IUPAC name for the structure below.

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?

Provide the proper IUPAC name for the alkene shown below.

For which of the following alkenes will cis- and trans- isomers not exist?

Provide an acceptable name for (CH3CH2)2CHCH2CH=CH2.

Draw an acceptable structure for 1,2-dimethylcyclohexene.

How many elements of unsaturation are implied by the molecular formula

Draw and name the six alkenes which have the molecular formula C₅H₁₀.

Provide an acceptable name for (CH₃)₂CHCH=C(CH₃)CH₂CH₃.

Provide the proper IUPAC name for the alkene shown below. CH₂ CHCH₂CH₂CH₂CH₃

Draw and name all alkenes which have the molecular formula C₄H₈.

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?

Provide an acceptable name for (CH₃CH₂)₂CHCH₂CH=CH₂.