Page 1 of 1

How to display polar dipole moments in VSEPR model

Posted: Sun Jul 16, 2017 1:45 pm
by FCervania 1B
Hello,

I was wondering what the arrows mean on a VSEPR model and how it displays the dipole moment.
I don't understand how the VSEPR model of CCl4 shows nonpolar dipole moments and CHCl3 shows polar dipole moments, is it simply the presence / absence of the arrows in the diagram?
Can't you still draw arrows on the CCl4 diagram, just make sure they point the right way?
Thanks

(Page 100 in the Course reader)

Re: How to display polar dipole moments in VSEPR model

Posted: Sun Jul 16, 2017 4:35 pm
by Davalanya 1F
The arrows show the direction of the dipole moments. If it's nonpolar the dipole moments cancel, you can think of it as the electron replusion, if there's repulsion it's polar and if there's attraction it's nonpolar because it cancels out the dipole moment. You can draw it to double check.

Re: How to display polar dipole moments in VSEPR model

Posted: Sun Jul 16, 2017 7:37 pm
by derek1d
What exactly do dipole moments measure? What about dipole moments allow them to cancel each other? Sorry, this topic is not the clearest to me if someone could please explain.