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Chapter 7 243
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radical anion
a species with an atom that has a negative charge and an unpaired electron.
retrosynthetic analysis
working backward (on paper) from a target molecule to available starting materials.
or retrosynthesis
tautomerization
interconversion of keto–enol tautomers.
tautomers
constitutional isomers that are in rapid equilibrium; for example, keto and enol
tautomers. The keto and enol tautomers differ only in the location of a double bond
and a hydrogen.
terminal alkyne
an alkyne with its triple bond at the end of the carbon chain.
vinylic cation
a species with a positive charge on a vinylic carbon.
vinylic radical
a species with an unpaired electron on a vinylic carbon.