Question

If the $\pi$-back bonding involves the lone pair of central atom, then bond angle gets opened up due to

• A. increase of bp/bp repulsion for the enhanced bond multiplicity
• B. decrease of lp/lp and lp/lp repulsion(s) on the central atom
• C. both (a) and (b)
• D. none of these

Answer 1

The correct option is C both (a) and (b)

If the $\pi$-back bonding involves the lone pair of central atom, then bond angle gets opened up due to :
(a) increase of bp/bp repulsion for the enhanced bond multiplicity
(b) decrease of lp/lp and lp/bp repulsion(s) on the central atom
As the repulsion between lone pair and bond pair decreases and the repulsion between bond pair and bond pair increases, the bond angle increases.