pentan2ylryhmistä

Pentan-2-yl is a branched alkyl group with the chemical formula C5H11. It is derived from pentane by removing a hydrogen atom from the second carbon. This results in a five-carbon chain where the attachment point to another molecule is at the second carbon. The structure can be represented as CH3-CH(CH3)-CH2-CH2-CH3. This specific arrangement distinguishes it from other pentyl isomers like n-pentyl, isopentyl, sec-pentyl (which is the same as pentan-2-yl), tert-pentyl, and neopentyl.

The term "pentan-2-yl" is commonly used in organic chemistry nomenclature to describe substituents in larger molecules. For example, it might appear as part of the name of an alcohol, ether, or amine. The physical and chemical properties of a molecule containing a pentan-2-yl group are influenced by the presence of this branched, five-carbon chain. These properties can include boiling point, solubility, and reactivity, which differ from those of compounds with straight-chain or differently branched alkyl groups. The pentan-2-yl group is a saturated hydrocarbon fragment, meaning it consists solely of carbon-carbon and carbon-hydrogen single bonds.