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CHEM 302 - Aldol Reactions Exam with correct answers
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CHEM 302 - Aldol Reactions Exam with correct answers
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CHEM 302 - Aldol Reactions Exam withcorrect answers
___ deprotonation of carbonyl compound makes an enol or an enolate, which are strong
nucleophiles that react with E+, leading to an ___ substitution reaction - correct answer
-alpha
enols and enolates are strong ____, and are the results of rxn happening at the alpha
carbon of ___ - correct answer -nucleophile, carbonyls
enols are made in ___ solution from carbonyl compound - correct answer -acidic
enolates are made in ___ solution from carbonyl compound - correct answer -basic
enolates are ___ nucleophiles than enols because of their ___ ___ - correct answer -
stronger, negative charge
enol and keto forms are ___ of the carbonyl group that differ in the position of the
double bond and a proton. - correct answer -tautomers
enol and keto forms differ in the position of the pi bond and a proton, making them ___
isomers - correct answer -constitutional
A(n) ___ tautomer has a C=O bond and an additional C-H bond - correct answer -keto
A(n) _______ tautomer has an O-H group bonded to a C=C - correct answer -enol
Equilibrium favors the keto form for most carbonyl compounds largely because the C=O
is much ___ and ___ than a C=C. - correct answer -stronger, stable
less than ___% of enol is present at equilibrium for most carbonyl compounds - correct
answer -1
With ___ ketones, two different enols are possible - correct answer -unsymmetrical
aka beta-dicarbonyl or 1,3-dicarbonyl compounds
compounds containing two carbonyl groups separated by a single carbon - correct
answer -active methylene compounds
for beta-dicarbonyl compounds (active methylene compounds), the concentration of
enol at equilibrium sometimes ____ the one of the keto form - correct answer -exceeds
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