Alkynols (''hydroxyalkynes'') are organic chemical compounds derived from

alkynes \ce \ce Acetylene \ce \ce \ce Propyne \ce \ce \ce \ce 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 no ...

and are among the

alcohols In chemistry, an alcohol is a type of organic compound that carries at least one hydroxyl () functional group bound to a saturated carbon atom. The term ''alcohol'' originally referred to the primary alcohol ethanol (ethyl alcohol), which i ...

. Thus, as structural features, they have a C≡C triple bond and a

hydroxy group In chemistry, a hydroxy or hydroxyl group is a functional group with the chemical formula and composed of one oxygen atom covalently bonded to one hydrogen atom. In organic chemistry, alcohols and carboxylic acids contain one or more hydrox ...

. They are not identical to the

ynol In organic chemistry, an alkynol (shortened to ynol) is an alkyne with a hydroxyl group affixed to one of the two carbon atoms composing the triple bond (). The deprotonated anions of ynols are known as '' ynolates''. An ynol with hydroxyl grou ...

s. Some alkynols play a role as intermediates in the chemical industry. Compounds in this group include

propargyl alcohol Propargyl alcohol, or 2-propyn-1-ol, is an organic compound with the formula C3H4O. It is the simplest stable alcohol containing an alkyne functional group. Propargyl alcohol is a colorless viscous liquid that is miscible with water and most pol ...

, 3-butyn-1-ol, and 5-hexyn-1-ol.

Synthesis

Alkynols may be formed by the

alkynylation In organic chemistry, alkynylation is an addition reaction in which a terminal alkyne () is added to a carbonyl group () to form an α-alkynyl alcohol (). When the acetylide is formed from acetylene (), the reaction gives an α-ethynyl alcohol. ...

of carbonyl compounds, usually in liquid ammonia.

Literature

* Allinger, Cava, de Jongh,

Johnson Johnson is a surname of Anglo-Norman origin meaning "Son of John". It is the second most common in the United States and 154th most common in the world. As a common family name in Scotland, Johnson is occasionally a variation of ''Johnston'', a ...

, Lebel, Stevens: ''Organische Chemie'', 1. Auflage, Walter de Gruyter, Berlin 1980, , p. 749. * Beyer / Walter: ''Lehrbuch der Organischen Chemie'', 19. Auflage, S. Hirzel Verlag, Stuttgart 1981, , pp. 98–99, 122. * K. Peter C. Vollhardt, Neil E. Schore: ''Organische Chemie'', 4. Auflage, Wiley-VCH, Weinheim 2005, , p. 632.

References

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