Question

Which of the following statement is correct for diborane?

• A. Small amines like $N{H}_3,C{H}_{3}N{H}_2$ give unsymmetrical cleavage of diborane
• B. Large amines such as $(C{H}_3{)}_{3}N$ and pyriding gives symmetrical cleavage of diborane
• C. Small as well as large amines both gives symmetrical cleavage of diborane
• D. (A) and (B) both

Answer 1

The correct option is D (A) and (B) both

Small amines like $N{H}_3,C{H}_{3}N{H}_2$ give unsymmetrical cleavage of diborane.
$B_2{H}_6+2N{H}_3\to \left[H_{2}B\right(N{H}_3{)}_2{]}^{+}[B{H}_4{]}^{-}$

Large amines such as $(C{H}_3{)}_{3}N$ and pyridine gives symmetrical cleavage of diborane
$B_2{H}_6+2N(C{H}_3{)}_3\to 2H_{3}B\leftarrow N(C{H}_3{)}_3$