benzoquinone

Thân thiện

A scientist examines a yellow benzoquinone sample in the laboratory.

Definition

Noun: 1. A type of aromatic organic compound: Benzoquinone refers to any chemical compound belonging to a specific class characterized by a benzene ring (a six-carbon aromatic ring) where two hydrogen atoms are replaced by two oxygen atoms, forming a quinone structure (a diketone). These compounds are typically yellow in color. 2. A biologically significant molecule: Benzoquinones include several compounds that play crucial roles in biological systems, often acting as coenzymes (helper molecules for enzymes), electron acceptors in cellular processes like respiration, or as vitamins (e.g., part of Vitamin K activity).

Usage Examples

• General Chemistry Context:
  • The bright yellow color of the solution indicated the presence of a benzoquinone.
  • Researchers synthesized a new benzoquinone derivative for testing.
• Biochemistry/Biology Context:
  • Ubiquinone, a benzoquinone, is an essential electron carrier in the mitochondrial electron transport chain.
  • The benzoquinone structure is a key feature in several biologically active quinones.

Advanced Usage

• "Benzoquinone moiety": Refers to the benzoquinone part of a larger, more complex molecule.
  • The drug's activity is attributed to its benzoquinone moiety, which can accept electrons.
• In technical literature, specific isomers are distinguished: 1,4-benzoquinone (-benzoquinone) and 1,2-benzoquinone (-benzoquinone).

Variants and Related Words

• Quinone (n): The broader class of cyclic diketones to which benzoquinones belong. All benzoquinones are quinones, but not all quinones are benzoquinones.
• Ubiquinone (Coenzyme Q) (n): A well-known, naturally occurring benzoquinone vital for energy production in cells.
• Hydroquinone (n): The reduced form of a benzoquinone, often interconverted in redox reactions.

Synonyms

• Quinone (in a broad, often interchangeable sense when context is clear)
• Cyclohexadienedione (systematic chemical name)

Notes on Different Meanings

The term "benzoquinone" is highly specialized and primarily used in scientific fields (chemistry, biochemistry, pharmacology). It does not have common idiomatic or figurative meanings. Its core meaning consistently relates to its specific chemical structure and biological function.

Học thuật

Noun

1. any of a class of aromatic yellow compounds including several that are biologically important as coenzymes or acceptors or vitamins; used in making dyes

Từ đồng nghĩa

• quinone