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

Posted: Fri Nov 23, 2018 12:14 pm
by Xinyi Zeng 4C
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!

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

Posted: Fri Nov 23, 2018 1:41 pm
by zoepamonag4C
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

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

Posted: Fri Nov 23, 2018 5:32 pm
by Elena Saab 4A
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!