t shape vs trigonal bipyramidal

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Nawaphan Watanasirisuk 3B
Posts: 58
Joined: Tue Nov 28, 2017 3:03 am

t shape vs trigonal bipyramidal

Postby Nawaphan Watanasirisuk 3B » Sat Dec 08, 2018 12:53 pm

Does anyone know why AX3E2 is t shape instead of trigonal bipyramidal? That is, why are the 2 lone pairs on the equatorial plane and not on opposite sides of the axial plane? Since lone pair-lone pair e- repulsion is the strongest, wouldn't it make more sense for the 2 lone pairs to be as far from one another as possible [180 degrees on opposite side of axial plane] instead of 120 degrees apart on the equatorial plane in a T-shape geometry?

Chloe Thorpe 1J
Posts: 77
Joined: Fri Sep 28, 2018 12:16 am

Re: t shape vs trigonal bipyramidal

Postby Chloe Thorpe 1J » Sat Dec 08, 2018 1:55 pm

The Chem_Mod answer to this question on another post has a nice explanation for this: viewtopic.php?t=2892

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