PF3 molecular geometry

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

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Chris Fults 1C
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Joined: Wed Nov 15, 2017 3:01 am

PF3 molecular geometry

Postby Chris Fults 1C » Sun May 27, 2018 10:37 pm

When drawing the Lewis structure of PF3 would there be one lone pair or a double bond? Also, do double or triple bonds matter in VSEPR?

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Re: PF3 molecular geometry

Postby salvadoralvizo1J » Sun May 27, 2018 10:48 pm

P would have one lone pair due to the fact that this has a formal charge of 0. It would also affect VSEPR shape, as it lone pairs have lower pull. Think of the example in class when he pulled the little ball and only the stick was sticking out.

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Re: PF3 molecular geometry

Postby ElizabethP1L » Sun May 27, 2018 10:51 pm

Fluorine cannot form a double bond since it only needs one more electron to fulfill it's octet and it's unable to form expanded octets. Therefore, you would expect 3 single bonds and a lone pair on P. For VSEPR, it would not affect the general shape of the atom but angles would differ because lone pairs tend to take up more space. Hope this helped!

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