PREDICT D SHAPE OF THE FOLLOWING MOLECULES based on VSEPR theory ; XeF4 BrF3 PCL5

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Solution

$H = \frac{1}{2} [V a l e n c e e^{-} o f t h e c e n t r a l a t o m + N o o f m a o n v a l e n t a t o m - c a t i o n + a n i o n] L o n e p a i r = H - N o o f s u u r o u n d i n g a t o m .$

$1 . X e F_{4} : H = \frac{1}{2} [8 + 4 - 0 + 0] = \frac{12}{2} = 6 (s p^{3} d^{2}) L o n e p a i r = 6 - 4 = 2 T h u s t h e s h a p e i s s q u a r e p l a n a r 2 . B r F_{3} : H = \frac{1}{2} [7 + 3 - 0 + 0] = \frac{10}{2} = 5 (s p^{3} d) L o n e p a i r = 5 - 3 = 2 S h a p e i s T s h a p e d 3 . P C l_{5} : H = \frac{1}{2} [5 + 5 - 0 + 0] = \frac{10}{2} = 5 (s p^{3} d) L o n e p a i r = 5 - 5 = 0 T h e s h a p e i s t r i g o n a l b i p y r a m i d .$

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