First slide

13th group or boron group

Question

The number of 3-centre-2-electron and 2-centre-2-electron bonds in Diborane respectively are ___?

Easy

A

1 and 2
B

2 and 4
C

2 and 2
D

1 and 4

Solution

In Diborane $(B_{2} H_{6})$ , two types of Hydrogen atoms are present, there are four terminal H- atoms and two bridged H-atoms
In $B_{2} H_{6}$ , four terminal H-atoms forms 2-centre-2-electron bonds where as two bridges H-atoms can form 3-centre-2-electron bonds
So, $In B_{2} H_{6} 4 2 C - 2 e^{⊙} bonds and 2 3 C - 2 e^{⊙} are present$ bonds are present

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