Lewis Bases and Lone Pair Electrons

[Joey_Okumura_1E]

Do Lewis bases tend to have lone pair electrons on their central atoms or lone pair electrons on any of the atoms?

[Lucy_Balish_3G]

You should always put the lone pairs on the central atom when you are drawing a lewis structure. That way you can ensure that the outer electrons have filled valence shells with a low formal charge and consequently know you are finding the most stable configuration.

[Aaron Akhavan-Dis1B]

Do Lewis bases tend to have lone pair electrons on their central atoms or lone pair electrons on any of the atoms?

I think as long as you satisfy the octet rule, you should be fine. A lot of central atoms are bonded with multiple other atoms but as long as they all have 8 valence electrons, and are the most stable configuration, you're good. :D

[Crystal Pan 2G]

In the example Dr. Lavelle gave during lecture, the lone pair donor(lewis base) was NH3 and it was on the N atom, and the lone pair acceptor(lewis acid) is B from BF3.