pyridine是什么意思 pyridine的读音、翻译、用法

As an English teacher, I can explain the term 'pyridine' from at least 4 perspectives and provide 5 English examples:

1. Definition: Pyridine is a basic heterocyclic organic compound with the chemical formula C5H5N. It is a derivative of benzene, with one carbon atom replaced by a nitrogen atom.

Example: Pyridine is widely used as a solvent and a building block for chemical synthesis.

2. Properties: Pyridine is a colorless liquid with a distinctively unpleasant odor, soluble in water and most organic solvents, and is a weak base.

Example: The pKa of pyridine is 5.2, which means it is a weaker base than ammonia.

3. Uses: Pyridine has a wide range of uses, including as a precursor to pharmaceuticals, agrochemicals, and dyes.

Example: The synthesis of anti-tuberculosis drug ethambutol involves the use of pyridine as a starting material.

4. Safety: Pyridine is considered to be a hazardous chemical, as it is flammable and toxic. It should be handled with care and only in well-ventilated areas.

Example: Pyridine should be stored in tightly sealed containers in a cool, dry, and well-ventilated area.

English examples:

1. Pyridine is commonly used as a solvent in the pharmaceutical industry.

2. The reaction of pyridine with acetic anhydride produces a compound used as a flavoring agent in foods.

3. Pyridine has been shown to have antifungal activity against certain plant pathogens.

4. The use of pyridine as a reagent in organic synthesis has greatly expanded the range of compounds that can be synthesized.

5. Pyridine is a key component in the preparation of the antimalarial drug chloroquine.