What is the IUPAC name for the molecule shown below?
A) 2,2,3-trimethyl-4-hexyne
B) 4-tert-butyl-2-pentyne
C) 4,5,5-trimethyl-2-hexyne
D) 4,5,5,5-tetramethyl-2-pentyne
E) 2,2-dimethyl-3-(1-propynyl)butane

Question

What is the IUPAC name for the molecule shown below? 
A) 2,2,3-trimethyl-4-hexyne 
B) 4-tert-butyl-2-pentyne 
C) 4,5,5-trimethyl-2-hexyne 
D) 4,5,5,5-tetramethyl-2-pentyne 
E) 2,2-dimethyl-3-(1-propynyl)butane

Quizplus · Accepted Answer

The longest continuous carbon chain in this molecule contains 6 carbons. There is a triple bond between the second and third carbon atoms. The substituents are two methyl groups attached to the fourth carbon atom and one methyl group attached to the fifth carbon atom. Therefore, the IUPAC name of this molecule is 4,5,5-trimethyl-2-hexyne.

What Is the IUPAC Name for the Molecule Shown Below