2-methylbutene-2 - is a substance of organic nature, belonging to the class of branched unsaturated / unsaturated hydrocarbons, namely, alkenes. It is a methyl derivative of butene-2 and pentene-2 isoper. The structural (graphical) formula of 2-methylbutene-2 shows the type of connection of atoms in the molecule, and from the name of the substance you can get information that the double bond and the methyl radical are located at the second carbon atom.
| Suggested title | 2-methylbutanamine-2 |
| Classes | Amen Primary amines |
| Molar mass | 87 g/mol |
| Gross formula | C5H13N |
- Receipt
- Hydrogenation of nitro compounds*
- Obtaining amines from alcohols
- Recovery in an alkaline or neutral environment*
- Displacement of amines from their salts by stronger bases
- Chemical properties
- N-alkylation of amines, obtaining secondary and tertiary amines
- The main properties of amines, obtaining ammonium compounds
- Reaction of primary amines with nitrous acid*
- Preparation of ammonium compounds with halogen derivatives
- Combustion
Receipt
Hydrogenation of nitro compounds*
2-methyl-2-nitrobutane + 3 hydrogen → (t°, nickel) → 2-methylbutanamine-2 + 2 water
Obtaining amines from alcohols
2-methylbutanol-2 + ammonia → (t °, cat.) → 2-methylbutanamine-2 + water
The reaction can continue until secondary and tertiary amines are obtained, in practice a mixture of products is obtained.
Recovery in an alkaline or neutral environment*
2-methyl-2-nitrobutane + 3 ammonium sulfide → 2-methylbutanamine-2 + 3 sulfur + 6 ammonia + 2 water
Displacement of amines from their salts by stronger bases
tertpentylammonium bromide + sodium hydroxide → 2-methylbutanamine-2 + sodium bromide + water
Chemical properties
N-alkylation of amines, obtaining secondary and tertiary amines
2-methylbutanamine-2 + chloroethane + sodium hydroxide → 2-methyl-N-ethylbutanamine-2 + sodium chloride + water
The reaction is carried out in two stages. The intermediate product is a salt, which can be treated with alkali to isolate the amine. Above is the summary equation of the two reactions.
The main properties of amines, obtaining ammonium compounds
2-methylbutanamine-2 + hydrochloric acid → tert-pentylammonium chloride
Reaction of primary amines with nitrous acid*
2-methylbutanamine-2 + nitric acid → 2-methylbutanol-2 + nitrogen ↑ + water
The reaction proceeds in two stages: sodium nitrite with hydrochloric acid give nitrous acid, which reacts with the amine.
A simplified record of the reaction is shown.
Preparation of ammonium compounds with halogen derivatives
2-methylbutanamine-2 + chloroethane → tert-pentylethylammonium chloride
Combustion
4 2-methylbutanamine-2 + 33 oxygen → (t°) → 20 carbon dioxide + 26 water + 2 nitrogen
