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Question

In diborane molecule hydrogen bridge bond is formed because boron has:


A
shortage of 4 electrons required for bonding
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B
shortage of 2 electrons required for bonding
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C
4 electrons more than required for bonding
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D
2 electrons more than required for bonding.
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Solution

The correct option is C shortage of 2 electrons required for bonding
  1. The bridge bonds are 3c-2e bonds. They have 2 electrons (4 in normal covalent). Thus in diborane boron is short of 2 electrons hence it forms hydrogen bridge.

Chemistry

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