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Why does borontrifluori.de behave as a Lewis acid?

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CBSE/Class 11/Science/Chemistry

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Chemistry Lecturer

Because it accept pair of electrons..
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MSc chemistry

In Borantrifluoride boran is with vacant orbital according to Lewis theory the elements ir ions with vacant orbitals act as Lewis acids
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In BF3, central atom has only six electrons after sharing with the electrons of the F atoms. It is an electron deficient compound and thus behaves as a Lewis acid.
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Central atom is B Atomic no. of B : 5 Electronic configuration of B : 1s2 2s2 2p1 Thus, for forming three bonds with three fluorine atoms, the paired electrons on 2s orbital gets excited and the ground state electronic configuration of B becomes 1s2 2s1 2p 2 still, one 2p orbital remains empty... read more

Central atom is B

Atomic no. of B : 5 

Electronic configuration of B : 1s2 2s2 2p1

Thus, for forming three bonds with three fluorine atoms, the paired electrons on 2s orbital gets excited and the ground state electronic configuration of B becomes 

1s2 2s1 2p 2 

still, one 2p orbital remains empty which has the tendency to accept an electron pair and thus behaves as a lewis acid.

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Because Boron is 13th group element and it is trivalent.. after forming three bonds with fluorine, the total number of electrons will be 6. Therefore to complete the octet configuration, it will accept a pair of electrons. According to Lewis concept, electron pair acceptors are called Acids.. so BF3... read more

Because Boron is 13th group element and it is trivalent.. after forming three bonds with fluorine, the total number of electrons will be 6. Therefore to complete the octet configuration, it will accept a pair of electrons. 

According to Lewis concept, electron pair acceptors are called Acids.. so BF3 is acting as Lewis acid..

read less
Comments

Because Boron is 13th group element and it is trivalent.. after forming three bonds with fluorine, the total number of electrons will be 6. Therefore to complete the octet configuration, it will accept a pair of electrons. According to Lewis concept, electron pair acceptors are called Acids.. so BF3... read more

Because Boron is 13th group element and it is trivalent.. after forming three bonds with fluorine, the total number of electrons will be 6. Therefore to complete the octet configuration, it will accept a pair of electrons. 

According to Lewis concept, electron pair acceptors are called Acids.. so BF3 is acting as Lewis acid..

read less
Comments

Because Boron is 13th group element and it is trivalent.. after forming three bonds with fluorine, the total number of electrons will be 6. Therefore to complete the octet configuration, it will accept a pair of electrons. According to Lewis concept, electron pair acceptors are called Acids.. so BF3... read more

Because Boron is 13th group element and it is trivalent.. after forming three bonds with fluorine, the total number of electrons will be 6. Therefore to complete the octet configuration, it will accept a pair of electrons. 

According to Lewis concept, electron pair acceptors are called Acids.. so BF3 is acting as Lewis acid..

read less
Comments

ChemScholar

Because it is electron deficient compund as the octet of boron is not satisfied
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Tutor

Due to deficiency of valance electron....
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fluorine is electronegative element of the periodic table it will withdraw electron density from central boron element maling it electron deficient hance behaving as lewis acid .
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