4.81 Question

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4.81 Question

Postby 305113590 » Sat Nov 24, 2018 10:22 pm

Borazine, B3N3H6, is a resonance structure that has alternating single and double bonds. This is because of the delocalization of electrons that contributes to the compound's stability. How would we know this without having prior knowledge of "aromaticity" in organic chemistry?

My initial thought was that it had all single bonds with lone pairs on nitrogen because boron is an exception to the octet rule.

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Re: 4.81 Question

Postby Chem_Mod » Sat Nov 24, 2018 11:25 pm

I would say that such knowledge often comes with experience, so doing a lot of questions is always a good way of learning in this section.
To answer the your question, when the molecule contain alternating single and double bond, the electron density can be diffused between the 6 elements within the ring, so just like benzene, it will be more stable compared to putting the pi bond electrons on nitrogen. Thus we should go with the more stable option if there is one.

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