Page 1 of 1

3F15

Posted: Sat Nov 16, 2019 10:56 pm
by JChen_2I
For 3F15, why does AsF3 have a higher boiling point than AsF5?
I guess my question is also: how is AsF5 polar while AsF3 not, as the answer key says?

Re: 3F15

Posted: Sat Nov 16, 2019 10:59 pm
by HanaAwad_4B
AsF3 is not polar because even though there are dipole moments, the geometry cancels out. Polar molecules have higher boiling points than nonpolar molecules.

Re: 3F15

Posted: Sun Nov 17, 2019 11:13 am
by Norman Dis4C
For both molecules, the electronegative force cancels out, but since AsF5 has more electrons, it has a higher boiling point.