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Byju's Answer

Standard XII

Chemistry

Shape and Geometry Using VSEPR

Which is corr...

Question

Which is correct statement about the diborane structure?

All

H B H

bond angles are equal

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All

H - B

bond lengths are equal

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It has two three-centre

- 2 -

electron bonds

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All hydrogen and boron atoms are in one plane

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Solution

The correct option is C It has two three-centre $- 2 -$ electron bonds

Diborane is an electron-deficient molecule. The two boron atoms and the four terminal hydrogen atoms of the molecule are all in the same plane.

The bridging hydrogen atoms lie above and below this plane. The two bridges $B - H - B$ bonds are unusual three centred two-electron bonds. The boron atoms in diborane undergo $s p^{3}$ hybridisation.

The bond length of $B - H$ (bridge) and $B - H$ (terminal) is 1.22 $˚ A$ and 1.19 $˚ A$ .

Hence, option C is correct.

Suggest Corrections

Similar questions

Q. The molecular shapes of diborane is shown: Consider the following statements for diborane:
1. Boron is approximately

s p^{3}

hybridised.
2.

B - H - B

angle is

180^{\circ}

.
3. There are two terminal

B - H

bonds for each boron atom.
4. There are only

12

bonding electrons available.
The correct statement(s) is/are:

Q. Consider the following statements for diborane.

1) Boron is approximately

s p^{3}

hybridized.

B - H - B

angle is

180^{o}

3) There are two terminal

B - H

bonds for each boron atom.

4) There are only

12

bonding electrons available.

Q. Given below are the statements about diborane.
(a) Diborane is prepared by the oxidation of

N a B H_{4}

with

I_{2}

.
(b) Each boron atom is in

s p^{2}

hybridized state.
(c) Diborane has one bridged 3 centre-2-electron bond.
(d) Diborane is a planar molecule.

The option with correct statement(s) is :

Q. Assertion: In diborane, each B atom is

s p^{3}

hybridised.

Reason: In diborane, the terminal 2-centre-2-electron B-H bonds are called banana bonds.

Select the correct option.

Q. The molecular shapes of diborane is shown below.
Consider the following statements for diborane :
1. Boron is approximately

s p^{3}

hybridised
2.

B - H - B

angle is

180^{\circ}

3. There are two terminal

B - H

bonds for each boron atom
4. There are only 12 bonding electrons available

The correct statements are:

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