Lone pairs

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

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Shreya Tamatam 3B
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Joined: Fri Sep 28, 2018 12:25 am

Lone pairs

Postby Shreya Tamatam 3B » Sat Dec 01, 2018 12:23 pm

How and why do lone pairs influence molecular shape?

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Re: Lone pairs

Postby Nicolette_Canlian_2L » Sat Dec 01, 2018 12:32 pm

Lone pairs cause repulsion between the the atoms bonded to the central atom. They create a smaller bond angle between the atoms because the atoms will be pushed down.

Esther Ahn 4I
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Re: Lone pairs

Postby Esther Ahn 4I » Sat Dec 01, 2018 11:46 pm

For repulsion strength, lone-lone pair has the highest repulsion strength, then it is lone-bonding pair and the weakest is bonding-bonding pair. Therefore, the lone pair electron forces the bonding electron closer together. This causes the angle to be slightly smaller than expected.

Yvonne Du
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Re: Lone pairs

Postby Yvonne Du » Sat Dec 01, 2018 11:54 pm

Lone pairs create strong repulsions since the charges are the same(negative). Therefore, they try to get away from each other and cause the bond angle to decrease. Also, the bonded atoms would most likely end up being close together since the lone pairs are getting away from each other.

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Re: Lone pairs

Postby uhedlund » Sun Dec 02, 2018 9:26 pm

Because repulsions between lone pairs and atoms are significantly stronger than those just between atoms, the repulsion from the lone pairs pushes the atoms closer together, creating smaller bond angles in the molecule.

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