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Explain why PCl_(5) is trigonal bipyramidal whereas IF_(5) is square pyramidal. |
Answer» Solution :`PCl_(5)` : The ground STATE and the excited state electronic configurations of phosphorus (Z = 15) are REPRESENTED below  In `PCl_(5), `P is `sp^(3)`d hybridised, therefore, its SHAPE is trigonal bipyramidal.  `IF_(5)`: The ground state and the excited state outer electronic configuration of IODINE (Z = 53) are represented below.  So in `IF_(5)`, I is `sp^(3) d^(2)` hybridised, as RESULT, shape of `IF_(5) ` is square pyramidal. 
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