Acyl group

File:Acetyl group.svg

The acetyl group, the acyl group related to acetic acid.

File:Essigsäure - Acetic acid.svg

Drawing of acetic acid showing two carbon atoms. The drawing, is one kind of structural formula.

In chemistry, an acyl group is a functional group (part of a molecule) related to an oxoacid. Removing a –OH group from an oxoacid gives the related acyl group.

In organic chemistry, acyl groups are usually related to carboxylic acids. For example, acetic acid is a carboxylic acid with the formula CH
3COOH, and the acetyl group is an acyl group with the formula CH
3CO–.

The formal definition of an acyl group allows for inorganic acids. The nitro group (related to nitric acid) and sulfonyl group (related to sulfuric acid and sulfonic acids) are inorganic acyl groups by this definition.

Acyl Group Media

• Chemical structural formulas of acyl group.svg

  A general acyl group (blue) in a ketone (top left), as an acylium cation (top centre), as an acyl radical (top right), an aldehyde (bottom left), ester (bottom centre) or amide (bottom right). (R1
  , R2
  and R3
  stands for organyl substituent or hydrogen in the case of R1
  )

• Reactivity of Carboxylic Acid Derivatives Towards Nucleophiles.png

  Acid chlorides are most reactive towards nucleophiles, followed by anhydrides, esters, amides, and carboxylate anions.

• Acetyl-chloride skeletal.svg

  Chemical structure of Acetyl chloride. Skeletal representation

• Acetic anhydride2DACS.svg

  Structure of Acetic anhydride

• Acetate anion.png

  Line drawing of the acetate anion.

• Ethyl-acetate-2D-skeletal.svg

  Skeletal formula of ethyl acetate.*CAS® Registry Number: 141-78-6 Image generated in ChemDraw Professional 22.2 and converted into SVG file using

• Ethoxide.png

  Line drawing of the ethoxide anion.

• Acetamide-2D-skeletal.png

  AcetamideDskeletal

• Amide anion.png

  The amide anion, which is the conjugate base of ammonia.

• Acetate anion.png

  Line drawing of the acetate anion.