What is B2H4? Important Knowledge about B2H4

  1. Definition of B2H4
    1.1 Names
    1.1.1 Common name: Diborane
    1.1.2 English name: Diborane
    1.2. Atomic mass of B2H4: Consists of 2 boron (B) atoms and 4 hydrogen (H) atoms
    1.3. Atomic weight: About 27.67 Dalton
    1.3.1 Molecular structure: The B2H4 molecule has a quite complex structure with 2 boron atoms connected to 4 hydrogen atoms through single covalent bonds and 2 three-center-two-electron bonds between the boron and hydrogen atoms.
    1.4 Ion structure: B2H4 does not form ions.

  2. Properties of B2H4
    2.1 Physical properties of B2H4: Diborane is a colorless, odorless, non-compressible compound that can explode when exposed to air.
    2.2 Chemical properties of B2H4: Diborane is flammable in air, forming water and boron trioxide. It can also react with water to produce boric acid and hydrogen.

  3. Common chemical equations involving B2H4

    • Reaction with air:
      B2H4 + 3O2â -> Ÿ¶ B2O3 + 2H2O ->
    • Reaction with water:
      B2H4 + 6H2Oâ -> Ÿ¶ 2H3BO3 + 4H2 ->

  4. Preparation of B2H4
    4.1 Laboratory synthesis of B2H4: Diborane is typically prepared from the reaction of boron trifluoride with hydrogen (HF), and then reacting with water.
    4.2 Industrial synthesis of B2H4: Industrially, diborane is typically prepared from the reaction of boron trifluoride with hydrogen under high pressure.

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