Q42: Dipolar cycloadditions requires a zwitterionic compounds.
Q43: A sigmatropic rearrangement involves the loss and
Q44: Photochemical electrocyclic reactions always involve disrotatory movement
Q45: The Hoffman rearrangement transforms an amide into
Q46: Sigmatropic rearrangements are photochemically forbidden.
Q48: Ketenes are capable of [2+2] thermal cycloadditions
Q49: Ozone transforms an alkene into carbonyls.
Q50: A dieneophile is activated with electron withdrawing
Q51: A reaction of an alkyne and an
Q52: [6+4] cycloadditions are thermally forbidden.
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