Question

Which one of the following does not exist in the free form?

• A. $B{F}_3$
• B. $BC{l}_3$
• C. $BB{r}_3$
• D. $B{H}_3$

Answer 1

Answer: (D)

Due to back bonding $B{F}_3,BC{l}_3$ and $BB{r}_3$ exist in free form. But $B{H}_3$ does not.