In which of the following molecules, hydrogen bridge bonds present?

  1. A

    Water

  2. B

    Inorganic benzene

  3. C

    Diborane

  4. D

    Methanol

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    Solution:

    In BH3, B is electron-deficient, therefore BH3 exits as a dimer (B2H6) and is known as diborane. In diborane, there are two bridging hydrogens (Hb) and four terminal hydrogens (Ha). There are two bridge bonds (terminal bond or banana bond), which is also known as three-center-two-electrons bonds. Structure of diborane is:

    Which one of the following is the electron deficient molecule?

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