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Which of the following compounds has a 3-centre bond?

1. (a) Diborane
2. (b) Carbon dioxide
3. (c) Boron trifluoride
4. (d) Ammonia

Correct answer: (a) Diborane

Solution

Diborane (B2H6) contains 3-centre-2-electron bonds, also known as banana bonds, where two electrons are shared between three atoms (two boron atoms and one hydrogen atom).

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