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Exercise: Aromatic or not: The Frost circle

Exercise

Hückel's rule says that a compound must have ...

Please make a choice.

Please make a choice.

correct

wrong

partly correct

This is the right answer

... 2n + 2 π electrons to be aromatic.

No, sorry.

... 4n + 2 π electrons to be aromatic.

Correct!

... 4n + 4 π electrons to be aromatic.

Sorry, that is wrong.

... 1n + 2 π electrons to be aromatic.

Sorry, that is not correct.

... 4n + 3 π electrons to be aromatic.

No, sorry.

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Exercise

In order to be aromatic all bonding molecular orbitals (MO) of a compound must be ...

Please make a choice.

Please make a choice.

correct

wrong

partly correct

This is the right answer

... occupied incompletely, and there must not be any electron in a destabilizing antibonding or non-bonding orbital.

No, sorry.

... occupied completely, and there must not be any electron in a stabilizing antibonding or non-bonding orbital.

Sorry, that is not correct.

... occupied completely, and there must be at least one proton in an antibonding or non-bonding orbital.

No, sorry. Protons in orbitals???

... occupied completely, and there must not be any electron in a destabilizing antibonding or non-bonding orbital.

Yes, that is correct.

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