Give names or structures for the following ammonium salts. Ind...

Question

Give names or structures for the following ammonium salts. Indicate whether each is the ammonium salt of a primary, secondary, or tertiary amine.

c. N-Butyl-N-isopropylhexylammonium chloride

Accepted Answer

All right. Hi, everyone. So this question is asking us what is the structure of N ethyl NPY py ammonium bromide? Is it a salt of a primary secondary or tertiary amine? So lets go ahead and get started. They given the context provided in the question, this compound NF or NPY pal ammonium bromide is an example of an ammonium salt. Now, an ammonium salt is an ionic compound composed of a cion and an anion. Now, the cion in this case would be the ammonium ion because nitrogen would have a negative charge, whereas the counter anion in this case would be bromide or br negative. So now that we know what the anion looks like. Let's go ahead and proceed with the structure of or cat I. So in this case, I always like to start off by drawing the parent chain first and recall that the parent chain is described towards the end of the name itself. So the phrase pal ammonium tells me that nitrogen is connecting to a five carbon chain. Now because there is no position number indicating where nitrogen is on the carbon chain, we can go ahead and assume that nitrogen would be connected to carbon one of the parent chain. So the the carbon on the end. So for my structure, I am going to go ahead and draw my nitrogen atom in the center and I'm going to go ahead and connect that to my five carbon chain. Now, its worth noting here that in addition to having the carbon chain, each individual carbon must have hydrogens to ensure that they have all four bonds that they require. Right. So for example, the inner carbons of the chain would require two hydrogens because they would already have two bonds to other atoms. Whereas carbon five of the chain would require three hydrogens since it has only one bond to another carbon. So now we can talk about substituents. Now notice how we have two substituents listed, right? We have an EO group and we have a propo group. But instead of listing a position number on the parent chain, we simply have a capital letter N before each of them. This if you recall indicates that these ocho groups are attached to the nitrogen directly. So attached to the nitrogen, in addition to the five carbon pairing chain is an EO group or C two C three as well as a pro group. So ch two ch two ch three. So here we have all the groups present on the nitrogen atom. However, because this is an ammonium salt, nitrogen is going to have a positive charge, right. So to make sure that that is the case, I'm going to add a hydrogen attached to our nitrogen, they give it a positive charge due to the fact that nitrogen now has four bonds. And so our last step is to go ahead and add the anion specifically bromite. And so I would place bromide next to my nitrogen so that their opposite charges can go ahead and interact. So now let's talk about classification. Recall that an amine can be classified as either primary secondary or tertiary depending on how many carbon atoms are attached to nitrogen. So a primary Amin for example, would have a nitrogen atom connected to only one carbon atom. A secondary amine would have a nitrogen atom connected to two carbon atoms, whereas a tertiary, I mean would have three carbon atoms attached to nitrogen. Now recall that ammonium ions are pronated amines. So by examining the structure of the compound, we just drew our nitrogen atom is connected to three carbon atoms. So therefore, the ammonium salt that we just drew is the pronated form of a tertiary a mean. So in my answer, I would say that it is and ammonium salt of a tertiary amit it referring to n ethyl and prop py ammonium bromide and there you have it right. So here is your structure. And our final answer is that it is an ammonium salt of a tertiary amine because nitrogen is connected to three carbon atoms. So with that being said, thank you so very much for watching. And I hope you found this helpful.

Give names or structures for the following ammonium salts. Indicate whether each is the ammonium salt of a primary, secondary, or tertiary amine.
c. N-Butyl-N-isopropylhexylammonium chloride

Key Concepts

Ammonium Salts

Amines Classification

Nomenclature of Organic Compounds

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