Question

In which of the following compounds B-F bond length is shortest
(1) BF4-
(2) BF3- NH3
(3) BF3,
(4) BF,N(CH3)3​

Answer 1

Answer:

BF3

Explanation:

Hope Answer Helps You:-)

Answer 2

The bond length will be shortest in BF3 compound so option (3) is correct.

• In a BF3 molecule, a property called as back bonding exists.
• Due to back bonding,  there is increase in bond order and decrease in bond length.
• Back bonding does not exist in any of the other compounds, so the bond order of the BF3 molecule is highest.
• Bond order and bond length are inversely proportional.
• Hence, BF3 has highest bond order and shortest bond length.