Chapter 7
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What is the IUPAC name for the following alkyne? A) 5-Bromo-2-heptyne B) 3-Bromo-5-heptyne C) 2-Bromo-2-methyl-4-hexyne D) 5-Bromo-5,5-dimethylhexyne E) 5-Bromo-5-methyl-2-hexyne
Answer: E
How many distinct terminal alkynes exist with a molecular formula of C5H8? A) 1 B) 2 C) 3 D) 4 E) 5
Answer: B
How many distinct internal alkynes exist with a molecular formula of C6H10? A) 1 B) 2 C) 3 D) 4 E) 5
Answer: C
What is the common name for the following alkyne? A) neohexyne B) trimethylpropyne C) trimethylacetylene D) tert-butylacetylene E) isopropylacetylene
Answer: D
Write structures and give IUPAC names for all alkynes with molecular formula C5H8.
Give the IUPAC name for (CH3)2C(CH2CH3)CCCH(CH3)2.
Answer: 2,5,5-trimethyl-3-heptyne
Give the IUPAC name for HCCCH2CH2CH3.
Answer: 1-pentyne
Give the IUPAC name for BrCH2CH2CCCH2CH3.
Answer: 1-bromo-3-hexyne
Draw an acceptable structure for acetylene.
Answer: H–C C–H
Draw an acceptable structure for 3-sec-butyl-1-heptyne.
Draw an acceptable structure for 2-hexyne.
Provide the systematic name of the compound shown.
Answer: 5,6,6-trimethyl-1-heptyne
Give the systematic name for the alkyne Cl3CCH2CH2CCCH3.
Answer: 6,6,6-trichloro-2-hexyne
Provide the structure of all distinct terminal alkynes with a molecular formula of C6H10.
Name the following compound. A) 3-heptyn-6-ol B) 3-hepten-6-ol C) 4-hepten-2-ol D) 4-heptyn-2-ol E) 4-heptan-2-ol
Answer: D
Name the following compound.
Answer: cis-4,5-dimethyl-4-hepten-2-yne or (Z)-4,5-dimethyl-4-hepten-2-yne
Provide an acceptable name for the compound shown.
Answer: 7,7-dichloro-5,5-dimethyl-3-heptyne or 7,7-dichloro-5,5-dimethylhept-3-yne
Give the IUPAC name for the following compound. A) isoprene B) 3-methyl-1,3-butadiene C) 2-methyl-1,3-butadiene D) 2-methyl-2,3-butadiene E) isobutadiene
Answer: C
What is the IUPAC name for the following compound? A) cis, trans-2, 4-heptadiene B) 2Z,4Z-2, 4-heptadiene C) cis, cis-2, 4-heptadiene D) trans, trans-2, 4-heptadiene E) 2E,4E-2, 4-heptadiene
Answer: A
Give the systematic name of the compound shown below.
Answer: 1,7-dimethyl-1,3-cycloheptadiene
Give the systematic name of the compound shown below.
Answer: (S)-5-methyl-5-hexen-2-ol
Name the following compound.
Answer: (2E,4Z)-2,4-hexadiene or trans, cis-2,4-hexadiene or (2Z,4E)-2,4-hexadiene or cis, trans-2,4-hexadiene
Provide the structure of (2E,4E)-2-chloro-2,4-octadiene.
Provide the systematic name of the compound shown.
Answer: (E)-5-methyl-5-hepten-1-yne