Question

In each of the reactants shown here, a CO2H group is separated from a OH group by the same number of carbons. When heated in the presence of acid, only the compound in the first reaction forms a lactone.
Explain why.

H2SO4
.CO2H
OH
No lactone
H,SO4
CO2H
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Transcribed Image Text

H2SO4 .CO2H OH No lactone H,SO4 CO2H