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Lone Pairs and Bond Pairs

Why are lp-lp...

Question

Why are lp-lp repulsion greater than lp-bp and bp-bp?

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Solution

$D e a r S t u d e n t L o n e p a i r s a r e n o t i n v o l v e d i n b o n d f o r m a t i o n, a n d a r e f r e e t o m a k e m o r e r e p u l s i o n a s i t i s o n l y u n d e r t h e a t t r a c t i o n o f o n e a t o m o n l y . B u t b o n d p a i r s a r e b o n d e d b e t w e e n t w o a t o m s, a n d a r e v e r y c l o s e t o n u c l e u s a s i t i s s h a r e d b e t w e e n t w o a t o m s . T h i s r e s u l t s t h a t b o n d p a i r m a k e l o w e r r e p u l s i o n . S o t h e o r d e r o f r e p u l s i o n i s : l p - l p > b p - l p > b p - b p R e g a r d s$

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