Quinone

Quinone

Quinone (/kwiːˈnoʊn/) is a class of organic compounds that are formally "derived from aromatic compounds [such as benzene or naphthalene] by conversion of an even number of –CH= groups into –C(=O)– groups with any necessary rearrangement of double bonds", resulting in "a fully conjugated cyclic dione structure". The class includes some heterocyclic compounds.

Etymology

The term 'quinone' originates from quinic acid, which is derived from the bark of the cinchona tree. Cinchona bark, known for its medicinal properties, was used to treat malaria from as early as the 1600s.

Types of Quinones

There are several types of quinones, including the following:

• Benzoquinone
• Naphthoquinone
• Anthraquinone
• Plastoquinone
• Ubiquinone

Biological Importance

Quinones are produced by various biological systems and are involved in several important biological processes. For example, ubiquinones are part of the electron transport chain in mitochondria, and plastoquinones are involved in photosynthesis in plants.

Related Terms

• Hydroquinone
• Quinol
• Quinhydrone
• Quinone methide

External links

• Medical encyclopedia article on Quinone
• Wikipedia's article - Quinone

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