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Pcl5 is well-known but PH5 cannot be prepared..explain why?

Pcl5 is well-known but PH5 cannot be prepared..explain why?

Grade:12th pass

1 Answers

Umakant biswal
5349 Points
7 years ago
dear shreya 
there are slight mistake in your ques , its PI5 not PH5 , 
in pcl5 due to small size and high electronegativity of cl , the hybridisation is possible , whereas in the case of pi5 molecule , hybridisation is restricted due to large size and less electronegativity of (iodine ) . 
hence , pi5 is not possible and highly unstable . 
HOPE IT CLEARS 
REGARDS 

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