Definition

1. Noun:
   • A toxic, colorless, flammable liquid organic base with a disagreeable odor; usually derived from coal. It is a heterocyclic compound with the formula C₅H₅N, used as a solvent and in the synthesis of other chemicals.

Usage Examples

• Noun:
  • The laboratory was well-ventilated due to the use of pyridine, which has a strong, unpleasant smell.
  • Pyridine is an important starting material for manufacturing many pharmaceuticals and agrochemicals.
  • The chemist handled the pyridine with extreme care, wearing gloves and safety goggles.

Advanced Usage

• "Pyridine ring": Refers to the specific six-membered ring structure of one nitrogen atom and five carbon atoms that defines pyridine and its derivatives.
  • The molecule contains a pyridine ring, which influences its chemical reactivity.
• "Pyridine derivative": Refers to any compound whose structure is based on or derived from the pyridine molecule.
  • Nicotine and vitamin B6 are examples of important pyridine derivatives found in nature.

Variants and Related Words

• Pyridinium (n): The cationic (positively charged) form of pyridine, often found in salts.
  • The reaction produced a pyridinium salt as a crystalline solid.
• Pyridyl (adj): A prefix or suffix used in chemical nomenclature to indicate a group derived from pyridine by removal of a hydrogen atom.
  • The compound has a pyridyl group attached to the main carbon chain.

Synonyms

• Azine (in a broader chemical context): A class of organic compounds that share a six-membered ring containing nitrogen, though this is a more general term.
• Solvent, base (describing its functions, but not direct synonyms for the specific compound).

Related Phrases

• Heterocyclic compound: The broader category of ring-shaped chemical compounds containing at least one atom other than carbon in the ring; pyridine is a prime example.
  • Pyridine is a fundamental heterocyclic compound in organic chemistry.

Noun

1. a toxic colorless flammable liquid organic base with a disagreeable odor; usually derived from coal