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Trigonal planar and bent shape

Posted: Wed Nov 14, 2018 11:48 am
by Lorena Zhang 4E
If the lewis structure of a molecule, for example ClO2+, has a lone pair, does it make the shape a trigonal planar or bent? I thought it would be bent, since the lone pair repulsion would make the bond angle slightly less than 120 degrees, but the answer says it should be trigonal planar.

Re: Trigonal planar and bent shape

Posted: Wed Nov 14, 2018 11:59 am
by Carolina Lechuga
we learned this in my discussion and according to my TA, trigonal-planar doesn't have a lone pair so the answer should be angular/bent. Im not sure why the book says that.

Re: Trigonal planar and bent shape

Posted: Wed Nov 14, 2018 12:02 pm
by Heesu_Kim_1F
The answer actually is that the shape is angular, which also means bent. However, it goes further to say that it is in a trigonal planar arrangement. I think what it's trying to explain is that its basic geometry is trigonal planar because the central atom consists of 3 regions of electron density. The molecular shape considering the lone pairs would be bent or angular. Hope this helps!