Question

In diborane

• A. 4-Bridged hydrogens and two terminal hydrogens are present
• B. 2-Bridged hydrogens and four terminal hydrogens are present
• C. 3-Bridged and three terminal hydrogens are present
• D. None of the above

Answer 1

The correct option is B 2-Bridged hydrogens and four terminal hydrogens are present

In diborane $\left(B_2{H}_6\right)$, there are two bridged $H$ atoms and four terminal $H$ atoms which along with two $B$ atoms lie in plane perpnedicular to each other.

The four terminal B-H bonds are​ regular two centre-two electron bonds. The two bridge (B-H-B) bonds are three​ centre-two electron bonds.​