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Pericyclic Reactions
Quiz 2

1 .       A symmetry-forbidden pathway [Hint]

2 .       Bond formation is antarafacial if [Hint]

3 .       According to molecular orbital theory, there is (are) ______ molecular orbital(s) produced for every atomic orbital involved. [Hint]

4 .       Antibonding orbitals result when [Hint]

5 .       When the four p orbitals of butadiene are combined, how many molecular orbitals are formed? [Hint]

6 .       The lowest unoccupied molecular orbital is known as the [Hint]

7 .       What product would (2E, 4E)-2,4-hexadiene give upon heating? [Hint]

8 .       In electrocyclic reactions, orbitals rotate to form bonds. If both orbitals rotate in the same direction, ring closure is called [Hint]

9 .       If the orbitals rotate in opposite directions, ring closure is called [Hint]

10 .       The selection rules for pericyclic reactions are also known as the [Hint]

11 .       The [3,3] sigmatropic rearrangement of a 1,5-diene is called [Hint]

12 .       The [3,3] sigmatropic rearrangement of an allyl vinyl ether is called a [Hint]

13 .       When a hydrogen migrates in a [1,3] sigmatropic rearrangement, the transition state involves a [Hint]

14 .       For a [1,3] sigmatropic migration of hydrogen under thermal conditions, the HOMO is [Hint]

15 .       A [1,7] sigmatropic hydrogen migration involves ________ pairs of electrons. [Hint]

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