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Boron is unable to form BF(6)^(3-)– ion....

Boron is unable to form `BF_(6)^(3-)`– ion. Explain.

Text Solution

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Due to non-availability of d orbitals, boron is unable to expand its octet. Therefore,
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Aluminium forms [AIF_(6)]^(3-) ion but boron does not form [BF_(6)]^(3-) ion. Explain.

Aluminium forms [AlF_(6)]^(3-) ion but boron does not form [BF_(6)]^(3-) ion.

Knowledge Check

  • Boron is unable to form BF_(6)^(3-) because of

    A
    High electronegativily of boron
    B
    high electronegativity of fluorine
    C
    Lack of d-orbitals in boron
    D
    less difference in electronegativity between B and F

  • Which one of the following elements is unable to form MF_(6)^(3-) ion ?

    A
    Ga
    B
    Al
    C
    B
    D
    In

  • Which one of following elements is unable to from MF_(6)^(3-) ion?

    A
    `Ga`
    B
    `Al`
    C
    `B`
    D
    `In`

    • Similar Questions

    Explore conceptually related problems

    Explain the following : (i) Gallium has higher ionisation enthalpy than aluminium. (ii) Boron does not exists as B^(3+) ion. (iii) Aluminium forms [AlF_(6)]^(3-) ion but boron does not form [BF_(6)]^(3-) ion. (iv) PbX_(2) is more stable than PbX_(4) . (v) Pb^(4+) acts as an oxidising agent but Sn^(2+) acts as a reducing agent. (vi) Electron gain enthalpy of chlorine is more negative as compared to fluorine. (vii) Tl(NO_(3))_(3) acts as an oxidising agent. (viii) Carbon shows catenation property but lead does not. (ix) BF_(3) does not hydrolyse completely (modified). (x) Why does the elemnet silicon, not form a graphite like structure whereas carbon does.

    When BCl_(3) is treated with water, it hydrolyses and forms [B(OH)_(4)]^(-) only whereas AlCl_(3) in acidified aqueous solution forms [Al(H_(2)O_(6))]^(3+) ion. Explain what is the hybridisation of boron and aluminium in these species ?

    When BCl_(3) is treated with water, it hydrolyses and forms [B[OH]_(4)]^(-) only whereas AlCl_(3) in acidified aqueous solution forms [Al[H_(2)O]_(6)]^(3+) ion. Explain what is the hybridisation of boron and aluminium in these species ?

    Explain the following (a) Gallium has higher ionisation enthalpy than aluminium (b) Boron does not exist as B^(3+) ion (c) Aluminium forms [AlF_(6)]^(3-) ion but boron does not form [BF_(6)]^(3-) ion.

    Assertion (A) : Al forms [AlF_(6)]^(3-) ions but B does not form [BF_(6)]^(3-) ions. Reason (R) : B does not react with F_(2) .

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