Butyl group

A butyl group is a piece of a chemical in organic chemistry. Butyl groups are a type of alkyl group. They are molecules of butane where a hydrogen atom has been

Butyl group

A butyl group is a piece of a chemical in organic chemistry. Butyl groups are a type of alkyl group. They are molecules of butane where a hydrogen atom has been removed to connect to a larger compound. The chemical formula of a butyl group is −C4H9, sometimes abbreviated Bu.

Isomers

There are four different structures of butyl groups, even though the formula is the same. These are called isomers. Two butyl isomers can be made from each butane isomer, depending on where a hydrogen atom is removed.

Parent butane Structure Common name IUPAC preferred name Systematic names Abbreviation
n-butyl butyl butyl
butan-1-yl 		Bu, nBu
sec-butyl butan-2-yl 1-methylpropyl

butan-2-yl

sBu
isobutyl 2‑methylpropyl 2-methylpropyl
2‑methylpropan‑1‑yl 		iBu
width=10% tert-butyl tert-butyl 1,1‑dimethylethyl
2‑methylpropan‑2‑yl 		tBu


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