isobutüül

Isobutyl refers to the branched-chain alkyl group with the formula –CH2CH(CH3)2. It is one of the four structural isomers of the butyl group, the others being n-butyl, sec-butyl, and tert-butyl. The isobutyl group is characterized by a methylene group attached to a tertiary carbon atom which is itself bonded to two methyl groups. This structural arrangement gives isobutyl distinct physical and chemical properties compared to its isomers.

In organic chemistry, the isobutyl group is commonly found as a substituent in various organic compounds. For instance, isobutyl acetate is an ester used as a solvent and in artificial flavorings. Isobutyl alcohol, also known as 2-methylpropan-1-ol, is a primary alcohol that finds applications in solvents, plasticizers, and as an intermediate in the synthesis of other chemicals. The presence of the isobutyl group can influence the solubility, boiling point, and reactivity of a molecule. Its branched structure often leads to lower melting points and higher vapor pressures compared to linear isomers.