Write the structure of benzylamine hydrochloride in two different ways, and name the hydrochloride as an ammonium salt.

Question

Structure of benzylamine with its chemical formula and name displayed alongside.

Accepted Answer

Hi, everybody. Our next problem says, provide two possible structures or die cyclo heal amine hydrochloride and give its name as an ammonium salt. And we're given a picture of the dy cyclohexylamine molecule. We have NH in the center and coming from the nitrogen, two cyclohexane groups. So right away seeing this amine and seeing that our questions talks about hydrochloride. It says we're looking for the structure of di cyclohexylamine hydrochloride that will probably make us think of the reaction of amines with strong acids, amines or weak basis. So we have an amine. So let's draw our bonded to N with another R group. So R prime and the hydrogen, we call that nitrogen has a lone pair. And if that reacts with a strong acid. So in this case, say hydrogen chloride, that the lone pair on the nitrogen can react with the hydrogen on the acid. It's an acid, it readily gives up a hydrogen ion and we'll end up with an ammonium. So RNR prime and this now has two hydrogens, oops hydrogen, not nitrogen. And with four bonds around it, the nitrogen now has a positive charge and this is an ammonium ion So with that in mind, we look at the structure we're given, we know we have a long pair in the nitrogen. Since it just has three bonds, it will react with hydrogen chloride. The kind of strange thing perhaps is we see this name of di cyclo hexamine, hydrochloride. Well, ammonium ions that have been formed by this reaction can be written in this form as the name of the amine plus the name of the acid since this reaction is so predictable. So in that case, we can actually write the structure and I'll just add it to our structure. We were given in the form of the amine and then a little dot after the Neen center and then right HCL again, the results of that reaction quite well known. The other perhaps more conventional way to write it is write our nitrogen and we know we have two cyclohexane rings coming out of there, they're still present. And now our nitrogen has two hydrogens on it and a positive charge then the acid which is disassociated and given us the hydrogen now exists as a chloride ion. So then I'll write cl minus and write that right next to harmonium ion. So this is our salt in the form of that ammonium and the chloride iron. And let's give it its name, we'd say die CYO Heel. Since there are two psycho heel groups there, ammonium chloride, we don't have any other groups. So there we go, we have our two possible structures. One where you have this dot HCL one where we actually draw the ammonium ion forming and associating with the chloride ion. And we have our name DICY Cloy ammonium chloride. See you in the next video.

Write the structure of benzylamine hydrochloride in two different ways, and name the hydrochloride as an ammonium salt.

Verified video answer for a similar problem:

Key Concepts

Benzylamine Structure

Hydrochloride Formation

Ammonium Salts