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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: artem.metelskiy on March 09, 2011, 04:35:07 PM

Title: [PF5Br]- question
Post by: artem.metelskiy on March 09, 2011, 04:35:07 PM

I'm asked to draw a Lewis dot structure for PF₅Br^-, but I'm not sure which element goes into center. I'm guessing it will be Br having 4 bonding pairs with F, one bonding pair with P and one lone pair. Is it correct?
I'm also asked to name molecular shape and Hybridization of central element. Would it  be square pyramidal shape and hybridization sp³d³? Thanks.

Title: Re: [PF5Br]- question
Post by: JustinCh3m on March 09, 2011, 06:05:45 PM

generally speaking, the halogens F and Br will behave like H in Lewis structures -- they usually are attached to just one other atom.  There are exceptions of course (i.e I3-), but go with this. 

So, try arranging the 6 halogens accordingly.  What do you get?...

Title: Re: [PF5Br]- question
Post by: artem.metelskiy on March 09, 2011, 07:01:27 PM

so the Lewis dot structure would look like this?
(https://www.chemicalforums.com/proxy.php?request=http%3A%2F%2Fi921.photobucket.com%2Falbums%2Fad54%2Fmetelskiy%2FMicroelectronics%2FPF5Br.jpg&hash=df5e8b289628d9a9d30a7385b983520515ca476a)
Molecular shape Octahedral and hybridization sp³d²?

Title: Re: [PF5Br]- question
Post by: rabolisk on March 09, 2011, 08:51:10 PM

Yes, I believe so.