Bond lengths of B - F in - BF 4-and BF 3 will be respectively-A- 143 pm - 130 pmB- 130 pm - 143 pmC- 122 pm - 132 pmD- 80 pm - 110 pm

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Bond lengths ...

Question

Bond lengths of $B - F$ in $[B F_{4}]^{-}$ and $B F_{3}$ will be respectively?

143 pm, 130 pm

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130 pm, 143 pm

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122 pm, 132 pm

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80 pm, 110 pm

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Solution

The correct option is A 143 pm, 130 pm
$[B F_{4}]^{-}$ has a $s p^{3}$ hybridized B atom and $B F_{3}$ has a $s p^{2}$ hybridized B atom. Also, greater the s-character, smaller is the bond length.

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Similar questions

Suggest reasons why the B–F bond lengths in BF₃ (130 pm) and (143 pm) differ.

Q. Assertion :The

B - F

bond lengths in

B F_{3}

and

B F_{4}^{-}

are different. Reason: In

B F_{3}

B - F

bond aquires some double bond character.

Read the above assertion and reason and choose the correct option regarding it.

Q. Suggest reasons why the

B F

bond lengths in

B F_{3}

(130 pm) and

{B F_{4}}^{-}

(143 pm) differ.

Q. In

B F_{3}

the

B - F

bond length is

1.30 ˚ A

, when

B F_{3}

is allowed to be treated with

M e_{3} N

it forms an adduct

M e_{3} N \to B F_{3}

the bond length of

B - F

in the adduct is :

Q. Assertion :The bond angle in

B F_{3}

is smaller than that in

B F_{4}^{-}

. Reason:

B F_{3}

has

s p^{2} -

hybridisation, whereas

B F_{4}^{-}

has

s p^{3} -

hybridisation.

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Bond lengths of B−F in [BF4]− and BF3 will be respectively?

The correct option is A 143 pm, 130 pm[BF4]− has a sp3 hybridized B atom and BF3 has a sp2 hybridized B atom. Also, greater the s-character, smaller is the bond length.

Bond lengths of $B - F$ in $[B F_{4}]^{-}$ and $B F_{3}$ will be respectively?

The correct option is A 143 pm, 130 pm
$[B F_{4}]^{-}$ has a $s p^{3}$ hybridized B atom and $B F_{3}$ has a $s p^{2}$ hybridized B atom. Also, greater the s-character, smaller is the bond length.