In
organic chemistry
Organic chemistry is a subdiscipline within chemistry involving the science, scientific study of the structure, properties, and reactions of organic compounds and organic matter, organic materials, i.e., matter in its various forms that contain ...
, dihydropyran refers to two
heterocyclic compounds with the
formula
In science, a formula is a concise way of expressing information symbolically, as in a mathematical formula or a ''chemical formula''. The informal use of the term ''formula'' in science refers to the general construct of a relationship betwe ...
C
5H
8O:
*
3,4-Dihydro-2''H''-pyran
*3,6-dihydro-2''H''-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).
The italicized capital ''H'' denotes the "indicated hydrogen", which is a second hydrogen atom present on the location where no double bond is present.
[A Guide to IUPAC Nomenclature of Organic Compounds (Recommendations 1993)]
''R-1.3 Indicated Hydrogen''
/ref>
See also
* Pyran
* Tetrahydropyran
References
{{DEFAULTSORT:Dihydropyran, 2, 3-