What does the Lewis Dot Diagram for PBrF4 look like? (phosphorous bromine tetrafluoride - I think thats what it's called)

quote:

Originally posted by Turbonium What does the Lewis Dot Diagram for PBrF4 look like? (phosphorous bromine tetrafluoride - I think thats what it's called)

I assume P is main group 5, it MIGHT look like this:

code:

Br
   \
F - P - F
F/    \F

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I see your 4 Crushs and raise you 3 As The Rush Comes. - Yan from PvD's first summerstage event in '03

K that's what I figured. But is the molecule polar? All the bonds are polar (En difference greater than or equal to 0.4). But does the fact that the Br is different that the 4 fluorides make it a difference enough to make it polar? If all 5 were fluorides, it obviously wouln't be polar.

En of P = 2.19
En of F = 3.98
En of Br = 2.96

quote:

Originally posted by Turbonium K that's what I figured. But is the molecule polar? All the bonds are polar (En difference greater than or equal to 0.4). But does the fact that the Br is different that the 4 fluorides make it a difference enough to make it polar? If all 5 were fluorides, it obviously wouln't be polar. En of P = 2.19 En of F = 3.98 En of Br = 2.96

i am NOT the authority on this, but i'd say it is. If you think about it:
You have this lonely Br atom on one end, which isn't all that EN, then these four MONSTERS of EN-ity on the other side, who pull like some crazy mofo's on those e-'s?

anyway, ask someone who knows their stuff, it's been 2 1/2 years for me.. i can tell you all about silicon crystals though.. if you care to know

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gibberish.... LOL


god i hate chemistry

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Yes it is polar, when thinking about polarity, think vectors.

Edit: sorry i didn't pay attention to the whole molecule . So yeah it will because, there are 4 fluorines (most electronegative F = 4.0) while bromine is less electronegative. The fluorines will pull electrons towards themselves from other atoms, making P and ultimately Br (which are both less electronegative) slightly more positive, giving a small charge separation.

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quote:

Originally posted by Mako Yes it is polar, when thinking about polarity, think vectors. Edit: sorry i didn't pay attention to the whole molecule . So yeah it will because, there are 4 fluorines (most electronegative F = 4.0) while bromine is less electronegative. The fluorines will pull electrons towards themselves from other atoms, making P and ultimately Br (which are both less electronegative) slightly more positive, giving a small charge separation.

but the other atoms are Fluorine, which is even more EN.

n/m

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I see your 4 Crushs and raise you 3 As The Rush Comes. - Yan from PvD's first summerstage event in '03

quote:

Originally posted by drizzt81 but the other atoms are Fluorine, which is even more EN. n/m

err.. you didn't read my edit?

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quote:

Originally posted by Mako err.. you didn't read my edit?

ohh n/m lol!

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"When your spirit is floating down that tunnel towards the light, you know what's behind the light? It's not God, it's me. And im gonna kick your poncey soul all the way back down the tunnel till you choke on your own fucked up ribs. NOW, wake the fuck up!"

quote:

Originally posted by Mako ohh n/m lol!

i gather you did not read mine ;P

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I see your 4 Crushs and raise you 3 As The Rush Comes. - Yan from PvD's first summerstage event in '03

quote:

Originally posted by drizzt81 i gather you did not read mine ;P

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"When your spirit is floating down that tunnel towards the light, you know what's behind the light? It's not God, it's me. And im gonna kick your poncey soul all the way back down the tunnel till you choke on your own fucked up ribs. NOW, wake the fuck up!"

Looks polar to me, although Chem was a looooong time ago.