In
organic chemistry
Organic chemistry is a subdiscipline within chemistry involving the scientific study of the structure, properties, and reactions of organic compounds and organic materials, i.e., matter in its various forms that contain carbon atoms.Clayden, J.; ...
, the term ethynyl designates a
functional group
In organic chemistry, a functional group is a substituent or moiety in a molecule that causes the molecule's characteristic chemical reactions. The same functional group will undergo the same or similar chemical reactions regardless of the rest ...
with a
double bond with 2 carbon atoms both with
sp hybridisation and a triple bond(1 sigma and 2 pi bond) . It is a species similar to acetylene (or in IUPAC ethyne ) with a less H atom thus joined to root chain.
* An ethynyl group (HC≡C–), also designated as acetylenic group (from
acetylene
Acetylene (systematic name: ethyne) is the chemical compound with the formula and structure . It is a hydrocarbon and the simplest alkyne. This colorless gas is widely used as a fuel and a chemical building block. It is unstable in its pure ...
), and referred to in IUPAC chemical nomenclature as
-yne
In chemistry, the suffix -yne is used to denote the presence of a triple bond.
The suffix follows IUPAC nomenclature, and is mainly used in organic chemistry. However, inorganic compounds featuring unsaturation in the form of triple bonds may ...
suffix. Also sometimes designed as ''ethinyl'' in compounds (
ethinylestradiol,
ethisterone (ethinyltestosterone)). See main page
alkyne
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Acetylene
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Propyne
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1-Butyne
In organic chemistry, an alkyne is an unsaturated hydrocarbon containing at least one carbon—carbon triple bond. The simplest acyclic alkynes with only one triple bond and n ...
s.
* The
ethynyl radical
The ethynyl radical (systematically named λ3-ethyne and hydridodicarbon(''C''—''C'')) is an organic compound with the chemical formula C≡CH (also written CHor ). It is a simple molecule that does not occur naturally on Earth but is abundant ...
(HC≡C·), the compound found in interstellar medium, and transiently on earth during chemical reactions.
* The ethynyl carbanion
Acetylide (HC≡C
−)
See also
*
Ethynylation
*
Propynyl ( H
3C–C≡C–R, 1-propynyl group; or HC≡C–CH
2–R, 2-propynyl group,
Propargyl
In organic chemistry, the propargyl group is a functional group of 2-propynyl with the structure . It is an alkyl group derived from propyne ().
The term propargylic refers to a saturated position ( ''sp''3-hybridized) on a molecular framework n ...
)
Alkynyl groups
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