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What happens when PCl(5) is heated ?...

What happens when `PCl_(5)` is heated ?

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`PCl_(5)` has three equatorial (202 pm) and two axial (240 pm) bonds (Fig. 11.35, page 11/134). Since axial bonds are weaker (repelled by three bond pairs) than equatorial bonds (repelled only by two bond pairs), therefore, when `PCl_(5)` is heated, the less stable axial bonds break to form `PCl_(3)`.
`PCl_(5)overset("Heat")toPCl_(3)+Cl_(2)`.
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