Dihydropyran
In organic chemistry, dihydropyran refers to two heterocyclic compounds with the formula C5H8O:
- 3,4-Dihydro-2H-pyran
- 3,6-dihydro-2H-pyran
Nomenclature
In IUPAC names, "dihydro" refers to the two added hydrogen atoms needed to remove one double bond from the parent compound pyran. The numbers in front of the prefix indicate the position of the added hydrogen atoms (and not the position of the double bonds).[1] The italicized capital H denotes the "indicated hydrogen", which is a second hydrogen atom present on the location where no double bond is present.[2]
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gollark: ↑ thanks wikipedia
gollark: https://en.wikipedia.org/wiki/Epistemology
gollark: I assume so, but probably not for visible light.
gollark: Actually, what happens if you expose Caveman to ceramic memeplexes?
See also
References
- A Guide to IUPAC Nomenclature of Organic Compounds (Recommendations 1993): R-3.1.2 Hydro prefixes
- A Guide to IUPAC Nomenclature of Organic Compounds (Recommendations 1993): R-1.3 Indicated Hydrogen
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