Correct order of Lewis Acidic strength?

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p-Block Elements - I

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Correct order of Lewis Acidic strength?

$BF_3 < BCl_3 < BBr_3 < BI_3$

$BF_3 > BCl_3 > BBr_3 > BI_3$

$BF_3 = BCl_3 = BBr_3 = BI_3$

$BF_3 > BCl_3 < BBr_3 > BI_3$

Solution

(i) On the basis of back bonding, smaller be the halide atom, more effective be the back bonding and show less tendency to accept a pair of electrons.

(ii) Size of halides increase down the group, hence the ability of back bonding decreases making the molecule more acidic.

Hence, correct order of Lewis acid for boron-halides is $\mathrm{Bl}_{3}>\mathrm{BBr}_{3}>\mathrm{BCl}_{3}>\mathrm{BF}_{3}$

Standard 11

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(IIT-2022)

Correct order of Lewis Acidic strength?

Solution

Similar Questions

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Dilute aqueous solution of …….. acid is used as antibiotic.

How would you explain the lower atomic radius of $Ga$ as compared to $Al$?

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The compound($s$) which react($s$) with $NH _3$ to give boron nitride ($BN$) is(are)

$(A)$ $B$ $(B)$ $B _2 H _6$ $(C)$ $B _2 O _3$ $(D)$ $HBF _4$