Question

In which of the following compound B – F bond length is shortest?

• A. $B{F}_4^{\ominus }$
• B. $B{F}_3\leftarrow N{H}_3$
• C. $B{F}_3$
• D. $B{F}_3\leftarrow N(C{H}_3{)}_2$

Answer 1

The correct option is C $B{F}_3$


There is double bond characteristics between B – F bond due to back bonding.