secbutylcontaining

Secbutyl-containing refers to chemical compounds that include a sec-butyl group, a secondary butyl substituent with the formula -CH(CH3)CH2CH3. The term derives from butan-2-yl, the IUPAC name for this substituent. It is distinct from n-butyl (-CH2CH2CH2CH3) and isobutyl (-CH2CH(CH3)2). The sec-butyl group attaches to the parent molecule via the secondary carbon, often giving a moderately branched, sterically hindered site.

Common sec-butyl-containing species include sec-butyl alcohol (butan-2-ol), sec-butyl chloride (butan-2-yl chloride), sec-butyl acetate (butan-2-yl acetate). In formal naming, the substituent is called butan-2-yl in IUPAC nomenclature, with the common name sec-butyl. In larger molecules, the sec-butyl group is designated as a substituent at the point of attachment.