Question 11A.20: All the five bonds in PCl5 are not equivalent. Justify....
All the five bonds in PCl_5 are not equivalent. Justify.
Step-by-Step
PCl_5 has trigonal bipyramidal structure in which there are three P—Cl equatorial bonds and two P—Cl axial bonds. The two axial bonds are being repelled by three bond pairs at 90° while the three equatorial bonds are being repelled by two bond pairs at 90°. Therefore, axial bonds are repelled more by bond pairs than equatorial bonds and hence are larger (219 pm) than equatorial bonds (204 pm).
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