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give reason of variations in bond angel in nh3 and nf3 also in ph3 ans pf3
Dear Akashdeep,
Electron cloud of N-F bonds will pull closer to N as you reasoned... However -- this will reduce the overall repulsion between the N-F bonds! Thus, the repulsion from the lone pair-bond e will (in essence) be greater)and will tend to push N-F bonds closer togehter -- thereby reducing the bond angle for NF3.
Best Of luck
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Aman Bansal
Askiitian Expert
Dear akashdeep verma,
Look dear...
In NH3 the hybridisation is sp3 & there are three bond pairs & no lone pairs & so the bond angle is 109028'
But NF3 has a sp3 hybridisation with three bond pairs & a lone pair and since the lone pair-bond pair replusion is higher than the bond pair-bond pair repulsions,the bond angle gets reduced in NF3 to 10203' ..
The same appplies to PH3 and PF3 ...Here PH3 has the greater bond angle when compared to PF3 !
Hope you understood now...
All the Best & Good Luck !!
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