benzyl radical

Thân thiện

A chemist draws the benzyl radical structure on a whiteboard.

Definition

1. Noun:
   • The univalent radical derived from toluene: A chemical group or fragment with the formula C₆H₅CH₂–, formed by removing one hydrogen atom from the methyl group of toluene. It is a common substituent in organic chemistry.

Usage

• The term "benzyl radical" is used specifically in the context of organic chemistry to describe this particular molecular structure. It is a fundamental concept for naming and understanding benzyl-containing compounds.

Examples

• Noun:
  • Benzyl bromide is an alkylating agent where the benzyl radical is attached to a bromine atom.
  • The reactivity of the compound is increased by the presence of the benzyl radical.

Advanced Usage

• In reaction mechanisms: The benzyl radical can be an intermediate in free-radical reactions due to the stability provided by resonance with the aromatic ring.
  • The benzyl radical intermediate was detected during the photolysis reaction.

Variants and Related Words

• Benzyl group (n): Often used synonymously with "benzyl radical" to refer to the C₆H₅CH₂– substituent when it is not a free radical but a part of a larger, stable molecule.
  • Benzyl alcohol contains a benzyl group bonded to a hydroxyl group.
• Benzyl cation: The positively charged ion (C₆H₅CH₂⁺).
• Benzyl anion: The negatively charged ion (C₆H₅CH₂⁻).

Synonyms

• Phenylmethyl radical: A systematic name indicating a phenyl group (C₆H₅–) attached to a methylene group (–CH₂–).
• Bn (abbreviation): Commonly used in chemical shorthand and structural formulas to represent the benzyl group/radical.

Notes

• It is crucial to distinguish the "benzyl radical" (C₆H₅CH₂·) from the "phenyl radical" (C₆H₅·), which lacks the methylene (–CH₂–) bridge.
• In non-technical contexts, this term is rarely encountered.

Học thuật

Noun

1. the univalent radical derived from toluene

Từ đồng nghĩa

• benzyl
• benzyl group