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Topic: phosphrous mixhalides stability  (Read 3969 times)

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Offline shivam

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phosphrous mixhalides stability
« on: May 30, 2011, 08:16:00 AM »
which one is more stable PCl3F2 or PCl2F3 ?
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Offline cheese (MSW)

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Re: phosphrous mixhalides stability
« Reply #1 on: August 23, 2011, 12:08:21 PM »
Element-halogen (E-X) bond strengths decrease in the order E-F > E-Cl > E-Br > E-I (cf. E = C).
This is rationalized by MO overlap arguments:  there is more effective overlap with the F 2p AO thus concentrating e⁻ density between the two +ve centers.  With this idea in mind you should be able to predict which of PCl3F2 or PCl2F3 is  thermodynamically the more stable.
This site may also help:
http://www.wiredchemist.com/chemistry/data/bond_energies_lengths.html
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BryanSanctuary

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Re: phosphrous mixhalides stability
« Reply #2 on: December 12, 2013, 02:16:06 AM »
PCl3F2 is more suitable rather then PCl2F3.
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