IUPAC Common Names Still In Use

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Common Name IUPAC System Name Structure
isopropyl 1-methylethyl ispropyl
sec-butyl 1-methylpropyl sec-butyl
isobutyl 2-methylpropyl isobutyl
tert-butyl 1,1-dimethylethyl tert-butyl
neopentyl 2,2-dimethylpropyl neopentyl
ethylene ethene ethylene
propylene propene propylene
isobutylene 2-methylpropene isobutylene
vinyl vinyl vinyl
allyl allyl allyl
acetylene ethyne acetylene
The structures of neopentane and other groups ending with an -ane can be found by adding a Hydrogen to the open bond.

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