Answer to Question #133824 in Inorganic Chemistry for sdma rupasinghe

Question #133824
why F-Xe-F bond angles in XeF4 are equal?
1
Expert's answer
2020-09-21T06:36:43-0400

Because, in XeF4 The central atom is Xe

Thus according to the VSEPR Theory, Xe contributes 8e-

While the 4 x F contribute 4e-

Total VSE = 12

and therefore total VSEP = 6


The molecular geometry is therefore square planer( based on octahedral) or square pyramidal,

having the fluorine atoms directed towards the four corners of the square.

F-Xe bond angles are therefore 90o or 180o and the lone pairs are on the opposite sides of the molecule (at 180o from each other) to minimize lone-pair: lone-pair interactions


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