Textbook Question
Give names or structures for the following ammonium salts. Indicate whether each is the ammonium salt of a primary, secondary, or tertiary amine.
a.
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17. Amines
Naming Ammonium Salts
Multiple Choice
Provide the IUPAC name for the following ammonium ion.
A
sec-butylcyclohexylammonium ion
B
N-isopropylcyclohexanammonium ion
C
N-cyclohexyl-2-propanammonium ion
D
N-propylcyclohexanammonium ion
Verified step by step guidance1
Identify the structure of the ammonium ion in the image. The central nitrogen atom is bonded to a cyclohexyl group and a propyl group.
Recognize that the nitrogen atom is part of an ammonium ion, indicated by the positive charge.
Determine the longest carbon chain attached to the nitrogen. In this case, the cyclohexyl group is a six-membered ring, and the propyl group is a three-carbon chain.
Assign the substituents on the nitrogen atom. The cyclohexyl group is a substituent, and the propyl group is another substituent.
Combine the substituents with the ammonium ion naming convention. The IUPAC name is formed by naming the substituents alphabetically followed by 'ammonium'. Thus, the correct IUPAC name is N-propylcyclohexanaminium.
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