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### Charges on Amines

Posted: Sun Mar 13, 2016 1:07 pm
Is there supposed to be a charge on amines? Because wouldn't a tertiary amine have one more bond the the first three types?

### Re: Charges on Amines

Posted: Sun Mar 13, 2016 6:07 pm
To be neutral, nitrogen should have three bonds and one lone pair. A primary amine has two bonds to hydrogens, one bond to an alkyl group, and one lone pair (example: $CH_{3}-NH_{2}$. A secondary amine has one bond to hydrogen, two bonds to alkyl groups, and one lone pair (example: $CH_{3}-NH-CH_{3}$. A tertiary amine has three bonds to alkyl groups and one lone pair (example: $(CH_{3})_{3}-N$. In all of these, the nitrogen has three bonds and one lone pair, giving it a neutral charge.