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PCl(5) acts as a chlorinating agent in o...

`PCl_(5)` acts as a chlorinating agent in organic reactions. Why ?

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`PCl_(5)` has a trigonal bipyramidal shape in which P-Cl (a) bonds are slightly larger than the P-Cl (e ) bonds. This makes the molecule rather unstable. It dissociates to lose two chlorine atoms involved in the axial bonds and acts as a chlorinating agent.
`PCl_(5) harr PCl_(3)+Cl_(2)`
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