In the structure of diborane....

1.	In the structure of diborane....
Answer» All hydrogen ATOMS LIE in one PLANE and boron atoms lie in a plane perpendicular to this plane. 2 boron atoms and 4 terminal hydrogen atoms lie in the same plane and 2 bridging hydrogen atoms lie in the perpendicular plane. 4 bridging hydrogen atoms and boron atoms lie in one plane and two terminal hydrogen atoms lie in a plane perpendicular to this plane. All the atoms are in the same plane. Solution :The four terminal hydrogen atoms and the two boron atoms lie in one plane. Above and below this plane, there are two bridging hydrogen atoms. The four terminal B-H bonds are regular two-centre-two-electron bonds while the two bridge (B-H-B) bonds are different and can be described in terms of three-centre-two-electron bonds as shown in FIGURE :

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