pcl5 is known but pi5 is not Known explain
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0
Answer:
because it is a base and pi5 is not a base
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3
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I think it would be helpful for you
Explanation:
Since phosphorus has no vacant d-orbitals (Electronic configuration of phosphorous : 1s2 2s2 2p6 3s2 3p3); hence overlapping of 5 atoms of iodine is not possible to fit into them.Also the size of phosphorus atom is smaller than that of Iodine thus a single Phosphorus atom cannot contain or hold 5 halogens I atoms together. The bond length of, for example, the phosphorus-iodine bond is too short. So several atoms of Iodine cannot be arranged in an energetically favorable manner around a small P atom.
But it is false that PI5 do not exist. They do exist but they are in the form of [PI4]+ I-
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