Ch. 14 - Aromaticity

Which of the following is aromatic?

• A

• B

• C

• D

• E

Which of the following has significant resonance stabilization?

• I

• II

• III

• None

• All of the above

Which is NOT aromatic?

• I

• II

• III

• IV

• V

Which reagent can be used as a simple chemical test to distinguish between benzene and 1-hexene?

• A

• B

• C

• D

• E

How many equivalent resonance structures can be drawn for the cyclopentadienyl anion?

• 3

• 6

• 5

• 2

Consider the molecular orbital diagram of benzene. In ground state, how many molecular orbitals are filled with electrons?

• 6

• 3

• 1

• 2

Cyclopentadiene is unusually acidic for a hydrocarbon. An explanation for this is the following statement is...

• All of the atoms are sp2 hybridized

• Cyclopentadiene is aromatic

• Removal of a hydride ion yields a highly stable aromatic cation

• Removal of a proton yields a highly stable aromatic anion

• I

• II

• III

• IV