Question:
In the structure of diborane, the number of 2-centre-2-electron bonds is X and 3-centre-2-electron bonds is Y. The value of (X + Y) is:
In the structure of diborane, the number of 2-centre-2-electron bonds is X and 3-centre-2-electron bonds is Y. The value of (X + Y) is:
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Diborane is an electron-deficient compound with unusual 3-centre-2-electron bonds forming bridges between boron atoms.
Updated On: Jun 4, 2025
- 5
- 6
- 4
- 8
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The Correct Option is B
Solution and Explanation
Diborane (B$_2$H$_6$) contains:
- Four terminal B-H bonds (2c-2e), so X = 4
- Two bridging hydrogen bonds (3c-2e), so Y = 2
Thus, X + Y = 4 + 2 = 6
- Four terminal B-H bonds (2c-2e), so X = 4
- Two bridging hydrogen bonds (3c-2e), so Y = 2
Thus, X + Y = 4 + 2 = 6
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