Provide the systematic IUPAC name for (CH₃)₂CHC≡CCH₂C(CH₃)₃. A)1,1,5,5,5-Pentamethyl-2-pentyne B)1,1,1,5,5-Pentamethyl-3-pentyne C)2,2,6-trimethyl-4-heptyne D)2,6,6-trimethyl-3-heptyne E)tert-butylisopropylacetylene

Question

Quizplus · Accepted Answer

The longest carbon chain is 13 carbons, and the triple bond is between carbons 3 and 6 from the left end. Therefore, the base name is "heptyne" with substituents at positions 2, 6, and 6. The substituents are three "methyl" groups, which are indicated by the prefix "trimethyl." The groups attached to the 2-carbon are "ethylthio" groups, which are represented by the prefix "eth." Finally, the group attached to the 6-carbon is a "cyclohexylthio" group, which is represented by the prefix "cyclohexyl." Putting these together gives the systematic name "2,6,6-trimethyl-3-heptyne."

Provide the Systematic IUPAC Name for (CH3)2CHC≡CCH2C(CH3)3

Provide the Systematic IUPAC Name for (CH₃)₂CHC≡CCH₂C(CH₃)₃