Topic: Electronic configuration and general trends, Group 13 and 14· p-Block Elements

Which of the following statement is not correct about diborane ?

1. Both the Boron atoms are \(sp^2\) hybridised.

2. There are two 3-centre-2-electron bonds.

3. The four terminal B-H bonds are two centre two electron bonds.

4. The four terminal Hydrogen atoms and the two Boron atoms lie in one plane.

Doubtly Asked 30 Oct 2026 NEET UG 2022 Practice test neet Save WhatsApp Report

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Answer: 1. Both the Boron atoms are \(sp^2\) hybridised.

Key idea: in diborane each boron is \(sp^3\) hybridised, not \(sp^2\).

Each B uses four \(sp^3\) orbitals: two form 2c-2e bonds with terminal H atoms, two form the 3c-2e bridge (banana) bonds. Hence statement (1) is wrong.

(2) Two 3-centre-2-electron B-H-B bonds exist. True.
(3) Four terminal B-H bonds are 2c-2e. True.
(4) Four terminal H and two B lie in one plane; the two bridge H lie above and below it. True.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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Which of the following statement is not correct about diborane ?

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