Question

The structure of diborane contains:

• A. four $2C-2e$ bonds and two $3C-2e$ bonds
• B. two $2C-2e$ bonds and four $3C-2e$ bonds
• C. two $2C-2e$ bonds and two $3C-2e$ bonds
• D. four $2C-2e$ bonds and four $3C-2e$ bonds

Answer 1

The correct option is A four $2C-2e$ bonds and two $3C-2e$ bonds

$B_2{H}_6$ has $4B-H$ bonds with terminal hydrogen that are $2$ centered $2$ electron bonds. The remaining two hydrogen are bridged hydrogen that are formed by using three nucleus held by two electrons.