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Lone pairs

Posted: Sun Jun 03, 2018 4:51 pm
by Alysia Garcia 1B
I know that an atom with a lone pair would cause more repulsion and therefore a smaller bond angle than normal but how does it cause this repulsion?

Re: Lone pairs

Posted: Sun Jun 03, 2018 5:15 pm
by Shione Nakahara 1F
Bonding pairs take up less space because they are farther away from the central atom and is controlled by the sharing atoms, while a lone pair is closer to the nucleus and repels more strongly.

Re: Lone pairs

Posted: Sun Jun 03, 2018 8:19 pm
by Jimmy lira-1G
To answer your question:

"Lone pairs have the greatest repelling effect because they are closer to the nucleus of the central atom compared to the bonding pairs, therefore they repel other lone pairs greater compared to bonding pairs. Bonding pairs have a bond between the nucleus of the central atom and the nucleus of a bonding atom, therefore, are further away from the nucleus, so they do not repel other electrons as much as lone pairs. "
I posted an attachment to another post but ill post it here to where that ^ information comes from!

-Jimmy Lira 1G

Re: Lone pairs

Posted: Sun Jun 03, 2018 9:31 pm
by Alexis Bravo 1D
The lone pair would cause the repulsion because of how close it is to the nucleus of the central atom.

Re: Lone pairs

Posted: Sun Jun 03, 2018 9:36 pm
by Jonghwee Park 1K
Would the increasing number of lone pairs on one atom increasingly decrease the bond angles of the molecule?

Re: Lone pairs

Posted: Sun Jun 03, 2018 9:50 pm
by Yitzchak Jacobson 1F
Hello :)
I believe the lone pair would cause the repulsion due to the distance it is from the central atom.
Really hope this helps!

Re: Lone pairs

Posted: Sun Jun 03, 2018 9:51 pm
by JulietOttenberg-1C
depending on where they are positioned, they could decrease the bond angles of the atom. If there are multiple lone pairs, they usually repel each other even more than bonding pairs so it really just depends on the structure.

Re: Lone pairs

Posted: Sun Jun 03, 2018 10:16 pm
by Isobel Tweedt 1E
In the case of linear shapes when a trigonal bipyramidal has 3 loan pairs or an octahedral has 4 loan pairs the bond angles are determined to be 180 degrees. How do loan pairs cause this?