3F15

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JChen_2I
Posts: 107
Joined: Fri Aug 09, 2019 12:17 am

3F15

Postby JChen_2I » Sat Nov 16, 2019 10:56 pm

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?

HanaAwad_4B
Posts: 45
Joined: Fri Aug 30, 2019 12:18 am

Re: 3F15

Postby HanaAwad_4B » Sat Nov 16, 2019 10:59 pm

AsF3 is not polar because even though there are dipole moments, the geometry cancels out. Polar molecules have higher boiling points than nonpolar molecules.

Norman Dis4C
Posts: 101
Joined: Sat Sep 28, 2019 12:16 am

Re: 3F15

Postby Norman Dis4C » Sun Nov 17, 2019 11:13 am

For both molecules, the electronegative force cancels out, but since AsF5 has more electrons, it has a higher boiling point.


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