PCl3Br2

Stephanie

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Mar 2, 2002, 1:04:15 AM3/2/02

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What is the most likely structure of PCl3Br2 and explain why it's the most
likely structure?

Stephanie

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Mar 2, 2002, 1:04:26 AM3/2/02

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Stephanie

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Mar 2, 2002, 1:05:24 AM3/2/02

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Graham Cowan

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Mar 2, 2002, 1:03:14 AM3/2/02

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Stephanie wrote:
>
> What is the most likely structure of PCl3Br2 and explain why it's the most
> likely structure?

Bigger things need more room.
Which things are biggest here?

--- Graham Cowan
http://www.eagle.ca/~gcowan/boron_blast.html --
let the baby play with matches in the fuel storage room!

Andrew Portess

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Mar 2, 2002, 7:42:56 AM3/2/02

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Whilst this molecule may appear feasible from a valence point of view, I
doubt very much that it would exist since you could not fit the 5 halogen
atoms around the phosphorous atom since they are too big, this is steric
hindrance.

However the most likely, and only possible structure as far as I can see (if
steric hindrance were to be ignored) is that each of the halogen atoms would
be covalently bonded to the phosphorous atom.

Andy

"Stephanie" <stephan...@icrazy.com> wrote in message
news:zXZf8.249$8E4....@sapphire.mtt.net...

Uncle Al

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Mar 2, 2002, 12:16:37 PM3/2/02

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Andrew Portess wrote:
>
> Whilst this molecule may appear feasible from a valence point of view, I
> doubt very much that it would exist since you could not fit the 5 halogen
> atoms around the phosphorous atom since they are too big, this is steric
> hindrance.
>
> However the most likely, and only possible structure as far as I can see (if
> steric hindrance were to be ignored) is that each of the halogen atoms would
> be covalently bonded to the phosphorous atom.

Well, duh. She wants to know how the trigonal bipy is populated. The
answer is obvious.

PBr5 is no problem.

--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
"Quis custodiet ipsos custodes?" The Net!

CpRuH2

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Mar 2, 2002, 4:58:59 PM3/2/02

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I believe you will find that PBr5 is actually the ion pair [PBr4]Br in the
solid state and that PCl5 is predominantly [PCl4][PCl6].

It is likely therefore that PCl3Br2 is [PCl3Br]Br - the original question is
highly interesting for this reason.

In solution I would bet it is also an ion pair in those solvents in which it
dissolves.

LOUIS

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Mar 5, 2002, 12:41:12 PM3/5/02

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Br-PCl3-Br!
I would say that the first PCl3 is sp3 then when adding Br2 (since Br is more
voluminous than Cl) the free sp3 doublet split induce the former sp3 P-Cl
link to become sp2; the splitted former free doublet up and down the planar
PCl3 links to the two Br (one up, one down) --> the two are more distant this
way (steric effect favourise this)
True that there must be some equilibrium
Br-PCl3-Br <--> Br-PCl2Br-Cl <--> Cl-PClBr2-Cl

PH Z

budhis...@gmail.com

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Dec 24, 2014, 9:46:55 AM12/24/14

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Sp 3d2 hybridisation so pentagonal bibpyramidal now we need to place 3 cl and 2 br so to have most stable compound we need to have one with minimum repulsion we need to place the atom suffering more repulsion in the equatorial plain be has greater size so 2 be will be placed and rest will be placed ... This is the reason pcl3br2 is polar where as p cl2br3 is non polar. It is the standard and correct explanation

budhis...@gmail.com

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Dec 24, 2014, 9:47:13 AM12/24/14

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