Definition: Acetylenyl is a compound that contains an acetyl group, which is a formamide (2H) - acetyl (CH3COOH), in its esterified or enol-form. Acetylenyl has several important uses. Acetyl groups are used to make a variety of compounds, including carboxylic acids, esters, and alcohols. The acetyl group is the part of an acetyl ester that gives it its distinctive smell and taste. The acetyl group in ethanone (CH3COOH) has been found to be responsible for the characteristic odour and sour taste of ethanol. It also plays a key role in the formation of alcohols. Acetylenyl compounds can form enol and ester bonds with other molecules. Acetylenyl is one of two acetyl groups in ethanone, the other being an acetyl group in propene (C8H18). Both are used to make alkane derivatives. It also plays a role in many chemical reactions. For example, it can be used as a reactant in the formation of a number of alcohols. Acetylenyl esters and carboxylic acids can be made from ethanone by adding water or reducing it with acetic anhydride (CH3COOH). The reaction produces ethanal (CH3CH2OH) and other organic compounds such as glycolates and ketones. It is also used in the preparation of esters, amides, and ethers. Acetylenyl ester bonds can be formed by adding water or reducing it with acetic anhydride. These reactions are important in the synthesis of several organic products including alkene, alkyne, and alkoxide compounds.

acetylenyl