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What is the hybridization of phosphorus in PCl5?(a) sp^3(b) sp^2(c) sp^3d(d) sp^3d^2I got this question during an internship interview.Origin of the question is P-Block Elements topic in chapter P-Block Elements of Chemistry – Class 12

Answer»

Correct answer is (C) sp^3d

For explanation: In PCl5, phosphorus undergoes sp^3d HYBRIDIZATION and has trigonal bipyramidal geometry in GASEOUS and liquid STATES. It has three equatorial, P-Cl bonds and two axial, P-Cl bonds. SINCE two axial P-Cl bonds are repelled by three bond pairs while three equatorial bonds are repelled by two bond pairs, therefore, axial bonds are longer than equatorial bonds.



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