Question:
Total number of electrons involved in the formation of bridge bonds in the structure of diborane is
Total number of electrons involved in the formation of bridge bonds in the structure of diborane is
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Diborane has 2 bridge bonds. Each banana bond requires exactly 2 electrons, making it 4 electrons in total for bridging.
Updated On: Jun 3, 2026
- 6
- 2
- 4
- 3
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The Correct Option is C
Solution and Explanation
Step 1: Concept
Diborane ($B_{2}H_{6}$) contains two types of bonds: terminal two-center two-electron ($2c-2e$) bonds and bridging three-center two-electron ($3c-2e$) bonds.
Step 2: Meaning
A bridge bond involves three atoms ($B-H-B$) sharing a single pair of electrons, making it an electron-deficient banana bond configuration.
Step 3: Analysis
There are exactly two bridging $B-H-B$ bonds present in a diborane molecule. Since each three-center bridge bond contains $2$ electrons, the total number of electrons involved across both bridge bonds is: $2 \text{ bridge bonds} \times 2 \text{ electrons per bond} = 4 \text{ electrons}$.
Step 4: Conclusion
Thus, the total count of electrons allocated exclusively within these bridging centers is 4.
Final Answer: (C)
Diborane ($B_{2}H_{6}$) contains two types of bonds: terminal two-center two-electron ($2c-2e$) bonds and bridging three-center two-electron ($3c-2e$) bonds.
Step 2: Meaning
A bridge bond involves three atoms ($B-H-B$) sharing a single pair of electrons, making it an electron-deficient banana bond configuration.
Step 3: Analysis
There are exactly two bridging $B-H-B$ bonds present in a diborane molecule. Since each three-center bridge bond contains $2$ electrons, the total number of electrons involved across both bridge bonds is: $2 \text{ bridge bonds} \times 2 \text{ electrons per bond} = 4 \text{ electrons}$.
Step 4: Conclusion
Thus, the total count of electrons allocated exclusively within these bridging centers is 4.
Final Answer: (C)
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