First slide

Diborane

Question

The bonds not present in diborane are

Moderate

A

B-H
B

B-H-B
C

B-B
D

H-B-H

Solution

In diborane each B atom undergoes sp³hybridisation ,it contains two B-H-B bridges . Each bridge bond is formed by overlapping of one "B"sp³hybrid orbital with one electron, hydrogen s-orbital with one electron and another boron sp³ hybrid orbital without electron .That is the bridge head bond is a electron deficient three centre two electron bond .
The number of atoms involved in bridged bonds in one diborane molecule is four.

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