Determining Location of Lone Pair

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Jamie Hsu
Posts: 31
Joined: Fri Sep 28, 2018 12:19 am

Determining Location of Lone Pair

Postby Jamie Hsu » Tue Nov 20, 2018 2:27 pm

When determining the location of a lone pair on the central atom, does it matter between which elements the lone pair is placed in? For example in the 7th edition number 2E.23c we have IO2F2-
We have iodine as the central atom and have Fluorine on the south and west end of Iodine and Oxygen to be on the north and west end of Iodine. As a result, does the lone pair on iodine matter if its between the two Fluorines, or one Fluorine and one Oxygen, or two Oxygens?

Nicholas Carpo 1L
Posts: 36
Joined: Fri Sep 28, 2018 12:19 am

Re: Determining Location of Lone Pair

Postby Nicholas Carpo 1L » Tue Nov 20, 2018 3:06 pm

It matters when you are drawing the 3D structure and determining the molecular geometry of the molecule. Since the lone pair would want to be in the area where it interacts with the least amount of other atoms, it would be in the equatorial plane with the 2 F atoms, while the 2 O atoms will be on the axial positions.

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