Naming Alkynes Worksheet
A Grade 11 Chemistry worksheet focusing on the IUPAC nomenclature of alkynes, including identifying parent chains, numbering, and naming branched alkynes.
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Naming Alkynes Worksheet
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Carefully read each question and provide the correct IUPAC name for the given alkyne structure or draw the structure from the given name. Remember to identify the longest carbon chain containing the triple bond, number from the end closest to the triple bond, and list substituents alphabetically.
1. The IUPAC name for CH≡CH is .
2. The IUPAC name for CH₃-C≡C-CH₃ is .
3. The IUPAC name for CH₃-CH₂-C≡C-CH₃ is .
1. Provide the IUPAC name for the following alkyne:
CH₃-C(CH₃)₂-C≡C-CH₂-CH₃
2. Provide the IUPAC name for the following alkyne:
CH₃-CH₂-C≡C-CH(CH₃)-CH₂-CH₃
1. When naming an alkyne, the carbon chain is always numbered to give the triple bond the lowest possible number.
True
False
2. If both a double bond and a triple bond are present in a molecule, the double bond always takes precedence in numbering.
True
False
1. Draw the condensed structural formula for 3-methyl-1-pentyne.
2. Draw the condensed structural formula for 4,4-dimethyl-2-hexyne.
1. What is the parent chain for 3-ethyl-1-hexyne?
Hexyne
Pentyne
Heptyne
Butyne
2. Which of the following is an incorrect IUPAC name for an alkyne?
1-butyne
2-pentyne
3-hexyne
4-methyl-1-pentyne
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