See-Saw Shape

(Polar molecules, Non-polar molecules, etc.)

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Doreen Liu 4D
Posts: 54
Joined: Wed Sep 11, 2019 12:17 am

See-Saw Shape

Postby Doreen Liu 4D » Tue Nov 19, 2019 8:57 pm

For a see-saw shape (AX4E), would the angles be <90?

Posts: 104
Joined: Sat Jul 20, 2019 12:15 am

Re: See-Saw Shape

Postby alicechien_4F » Tue Nov 19, 2019 8:59 pm

Yes, the angles would be less than 120 and less than 90 because the lone pairs causes a slight electron repulsion.

Subashni Rajiv 1K
Posts: 101
Joined: Wed Sep 18, 2019 12:16 am

Re: See-Saw Shape

Postby Subashni Rajiv 1K » Tue Nov 19, 2019 10:16 pm

The lone pair causes the angle to be slightly less than 90 degrees.

Diana Chavez-Carrillo 2L
Posts: 122
Joined: Fri Sep 28, 2018 12:18 am

Re: See-Saw Shape

Postby Diana Chavez-Carrillo 2L » Tue Nov 19, 2019 10:23 pm

Yes if asked for one bond angle then you can either say it is slightly less than 90 degrees or slightly less than 120 degrees. The reason for this is because the one lone pair causes electron repulsion than push the atoms closer together because the atoms want to minimize the electron repulsion experienced by the lone pair.

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