A dieneophile is activated with electron withdrawing groups.
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Q45: The Hoffman rearrangement transforms an amide into
Q46: Sigmatropic rearrangements are photochemically forbidden.
Q47: OsO4 transforms an alkene into a trans-diol.
Q48: Ketenes are capable of [2+2] thermal cycloadditions
Q49: Ozone transforms an alkene into carbonyls.
Q51: A reaction of an alkyne and an
Q52: [6+4] cycloadditions are thermally forbidden.
Q53: Electrocyclic ring closures involve the loss of
Q54: A diene is activated with electron withdrawing
Q55: A [2+2] cycloaddition is thermally allowed.
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