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Multiple Choice
Provide the complete, IUPAC name for the following molecule:
A
(S)-1-chloro-4-methylhex-2-ynal
B
(S)-1-chloro-4-methyl-2-yn-1-one
C
(S)-4-methylhex-2-ynoic acid chloride
D
(S)-4-methylhex-2-ynoyl chloride
Verified step by step guidance
1
Identify the longest carbon chain that includes the functional group. In this case, the longest chain is a hexane chain with six carbon atoms.
Determine the functional group present in the molecule. The image shows an acyl chloride group, which is characterized by a carbonyl group (C=O) bonded to a chlorine atom (Cl).
Locate the triple bond in the molecule. The triple bond is between the second and third carbon atoms in the chain, making it a hex-2-yne.
Identify the substituents attached to the main chain. There is a methyl group attached to the fourth carbon atom, and the stereochemistry at this carbon is specified as (S).
Combine the information to form the IUPAC name. The name should reflect the acyl chloride functional group, the position of the triple bond, the methyl substituent, and the stereochemistry: (S)-4-methylhex-2-ynoyl chloride.