- C6H6 a.k.a. Benzene is an organic chemical compound with the molecular formula C₆H₆. Its molecule is composed of 6 carbon atoms joined in a ring, with 1 hydrogen atom attached to each carbon atom. Because its molecules contain only carbon and hydrogen atoms, benzene is classed as a hydrocarbon.
- C6h6 a.k.a. Fulvene is one of several hydrocarbons with the same formula as benzene, C₆H₆. The fulvenes are the class of molecules based on this simple hydrocarbon skeleton; the parent chemical, fulvene, is rarely encountered itself. Thiele is credited with discovering the scope of the reaction between cyclopentadiene and aldehydes and ketones that yields the brightly coloured fulvene derivatives. Most fulvenes are still prepared by this route, starting from cyclopentadiene or its sodium cyclopentadienyl anionic form.
- C6h6 a.k.a. Benzvalene is an organic compound and one of several isomers of benzene. It was synthesised in 1971 by Thomas J. Katz et al.
- C6h6 a.k.a. Dewar benzene or bicyclo[2.2.0]hexa-2,5-diene is a bicyclic isomer of benzene with the molecular formula C₆H₆. The compound is named after James Dewar who included this structure in a list of possible C₆H₆ structures in 1867. However, he did not propose it as the structure of benzene, and in fact he supported the correct structure previously proposed by August Kekulé in 1865.
- also known as bicyclo[2.2.0]hexa-2,5-diene
- C6h6 a.k.a. Bicyclopropenyl is an organic compound and one of several valence isomers of benzene. The molecule can be described as two coupled cyclopropene units. The positions of the alkene groups can vary and therefore two other isomers are known: bicycloprop-1,2-enyl and bicyclopropen-1-yl.
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