Definition

Noun: A pungent, colorless gas with the chemical formula BF₃. It is a compound of boron and fluorine, used primarily as a catalyst in chemical reactions, especially in organic synthesis.

Usage

"Boron trifluoride" is a technical term used in chemistry and industrial contexts. It is always treated as a singular, non-count noun when referring to the substance as a whole. It is often discussed in terms of its properties, handling, and applications.

Examples

• The laboratory ordered a cylinder of boron trifluoride for the polymerization experiment.
• Boron trifluoride is highly reactive with water, forming corrosive acids.
• The chemist explained the role of boron trifluoride as a Lewis acid catalyst.

Advanced Usage

• As a Lewis acid: In advanced chemistry, boron trifluoride is a classic example of a Lewis acid (an electron pair acceptor). Its central boron atom has an empty orbital, making it highly electrophilic.
  • The empty p-orbital on boron in boron trifluoride allows it to accept an electron pair from a Lewis base.
• In coordination complexes: It forms stable adducts with ethers, amines, and other Lewis bases.
  • The boron trifluoride etherate complex is a common reagent in organic synthesis.

Variants and Related Words

• BF₃: The standard chemical formula abbreviation for boron trifluoride.
• Boron trifluoride etherate / BF₃·OEt₂: A common liquid complex of boron trifluoride with diethyl ether, used as a more manageable source of BF₃ in labs.
• Boron trifluoride dihydrate / BF₃·2H₂O: The compound formed when BF₃ reacts with water.

Synonyms

• BF₃ (Chemical formula)
• Boron fluoride (A less common but sometimes used name)

Related Phrases / Idioms

(This is a specific chemical compound, so it does not have idiomatic or phrasal verb usage in the conventional sense.)

Noun

1. a pungent colorless gas