What is the hybridization state of cation part of solid PCl5?
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Correct option is C)
In solid state, PCl5 prefers to exist as oppositely charged ions like [PCl4]+PCl6− as ionic bonding enhances the crystalline nature. Also, [PCl4]+=sp3 is tetrahedral while [PCl6−] is octahedral. These structures fit well into each other providing extra stability to the soild structure.
Thus, solid PCl5 exist as [PCl4]+[PCl6]− The cationic part of PCl5 is[PCl4]+. In PCl4+, Phosphorous forms 4σ−bonds.