Can the electronegativities of central/non-central atoms affect the bond angle?

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

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Xinyi Zeng 4C
Posts: 63
Joined: Fri Sep 28, 2018 12:18 am

Can the electronegativities of central/non-central atoms affect the bond angle?

Postby Xinyi Zeng 4C » Fri Nov 23, 2018 12:14 pm

Is it true that a more electronegative central atom will draw the bond pairs of electrons closer to itself, hence increasing the repulsion between bond pairs and in turn the bond angles(compare NH3 and PH3); while when non-central atoms are more electronegative, bond pairs are drawn further away from the central atom, hence decreasing the bond pair-bond pair repulsions and in turn the bond angles? (compare PCl3 and PI3)

Thank you!

zoepamonag4C
Posts: 30
Joined: Fri Sep 28, 2018 12:28 am

Re: Can the electronegativities of central/non-central atoms affect the bond angle?

Postby zoepamonag4C » Fri Nov 23, 2018 1:41 pm

I think that sounds right because the more electronegative an atom is the more likely it will pull the electron cloud to itself --> lowers bond angle

Elena Saab 4A
Posts: 43
Joined: Fri Sep 28, 2018 12:27 am

Re: Can the electronegativities of central/non-central atoms affect the bond angle?

Postby Elena Saab 4A » Fri Nov 23, 2018 5:32 pm

I think that if there are no lone pairs, the bond angle would be equal. It might slightly change with lone pairs, but not dramatically. However, this does help clarify polarity/dipole moments!


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