QUIZ 1. An amine called dimethyl ethylamine is what type of amine compound? a. Primary amine b. Secondary amine c. Tertiary amine d. Quaternary amine Answer: c. This amine clearly has three alkyl groups associated with it, making it a tertiary amine. A primary amine has one alkyl or aryl group, while a secondary amine has two alkyl or aryl groups attached to it. 2. What would the charge be on tetramethylammonium, which has four alkyl groups attached? a. +1 b. +2 c. +3 d. 0 Answer: a. This would be an ammonium ion that would have a single positive charge associated with it, which would essentially be no different from a regular NH4+ ammonium cation. 3. Which amine compound is charged? a. Primary amine b. Secondary amine c. Tertiary amine d. Quaternary amine Answer: d. A quaternary amine has four alkyl groups around a nitrogen compound. Because neutral nitrogen compounds have three hydrogen atoms or up to three alkyl groups, having a fourth would mean there is a positive charge on the compound.
188