4.5 Confusion

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Hussein Saleh 1L
Posts: 32
Joined: Tue Feb 20, 2018 3:01 am

4.5 Confusion

Postby Hussein Saleh 1L » Thu May 31, 2018 2:54 pm


I am having trouble with the answer to this question, "What's the shape of ClO2+" The answer says its trigonal planar but shouldn't it be bent?


Namie Fotion-1E
Posts: 31
Joined: Fri Apr 06, 2018 11:02 am

Re: 4.5 Confusion

Postby Namie Fotion-1E » Thu May 31, 2018 3:55 pm

Hi! So trigonal planar is correct in that it is the general geometry of CLO2, but if you want to define its shape, the shape is bent due to the lone pair repulsion

Jocelyn Fermin1J
Posts: 49
Joined: Tue Nov 14, 2017 3:01 am

Re: 4.5 Confusion

Postby Jocelyn Fermin1J » Thu May 31, 2018 3:58 pm

Hi Hussein,
ClO2+ does have a bent shape because of the lone pair, but the arrangement of molecules around the chlorine makes it a trigonal planar.
hope this helps!
Last edited by Jocelyn Fermin1J on Thu May 31, 2018 3:59 pm, edited 1 time in total.

Adela Henry 1I
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Joined: Fri Apr 06, 2018 11:03 am
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Re: 4.5 Confusion

Postby Adela Henry 1I » Thu May 31, 2018 3:58 pm

When you draw out the lewis structure, there are 2 single bonds between the Cl and the O atoms. O-Cl-O. There is also a lone pair of electrons around the Cl atom. This makes 3 regions of electron density meaning that the shape is trigonal pyramidal based on the arrangement of electrons. When considering lone pair repulsion, the shape is bent but for the purposes of this question that is not taken into account.

Hope this helps!

Faisal Alshamaa - 1L
Posts: 31
Joined: Fri Apr 06, 2018 11:01 am

Re: 4.5 Confusion

Postby Faisal Alshamaa - 1L » Fri Jun 01, 2018 12:01 am

Since we count lone pairs and atoms connected to the central atom as 1 region of electron density for each one, then there are 3 regions of electron density, meaning that this has to be trigonal. It is confusing though so I definitely understand.

Jacy Black 1C
Posts: 30
Joined: Fri Apr 06, 2018 11:01 am

Re: 4.5 Confusion

Postby Jacy Black 1C » Sat Jun 02, 2018 11:50 am

So let me try to reword this so I understand. The overall shape of the molecule is going to be determined by how many regions of electron density, LP and BP. But the overall arrangement of it would be the arrangement as if there were no LPs, and all of the three regions of electron density were BPS?

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