amine

/'æmain/

Thân thiện

A chemist carefully adds an amine to a test tube in the laboratory.

Definition

1. Noun:
   • A compound derived from ammonia by replacing hydrogen atoms with univalent hydrocarbon radicals: An "amine" is an organic compound and functional group that contains a basic nitrogen atom with a lone pair. It is formally derived from ammonia (NH₃) by replacing one or more hydrogen atoms with alkyl or aryl groups.

Examples of Usage

• Noun:
  • Methylamine is a simple amine with a strong odor.
  • Many pharmaceuticals, such as antihistamines, are complex amines.
  • The presence of an amine group often makes a molecule basic.

Advanced Usage

• Primary, Secondary, and Tertiary Amines: These classifications depend on how many hydrogen atoms in the ammonia molecule have been replaced by organic groups.
  • A primary amine, like ethylamine, has one organic group replacing a hydrogen.
  • A tertiary amine, like trimethylamine, has three organic groups.
• Amine as a Base: In chemical reactions, amines often act as bases, accepting a proton.
  • The amine group in the molecule can be protonated in acidic conditions.

Variants and Related Words

• Amino (adj): A prefix used to indicate the presence of an amine group, often in biochemistry.
  • Amino acids are the building blocks of proteins.
• Ammonia (n): The inorganic compound (NH₃) from which amines are formally derived.

Synonyms

• None in common usage: In technical chemistry, "amine" is the precise term. In very general contexts, one might refer to it as a nitrogenous base or organic base, but these are not direct synonyms.

Related Phrases (Phrasal Verbs)

• Not applicable: "Amine" is a technical noun and does not form standard phrasal verbs.

Related Idioms

• Not applicable: There are no common idioms using the word "amine."

Học thuật

Noun

1. a compound derived from ammonia by replacing hydrogen atoms by univalent hydrocarbon radicals

Từ đồng nghĩa

• aminoalkane