Boron compounds behave as Lewis acids, because of their
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boron due to the electron deficient nature behaves as Lewis acid.
According to the Lewis concept of an acid ,acid is that species (charged or uncharged) which can accept lone pair of electrons.The electronic configuration of boron is ns2 np1. Hence boron triflouride remains electron deficient and acts as a Lewis acid.
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Answer:
Boron halides behave as Lewis acids because they have only six electrons in the valence shell.
Explanation:
Boron atom has 3 free e- in its outermost shell.
These 3 e- pair with one e- each from three X atoms to form BF3 molecule.
This BX3 molecule is electron deficient as it has only 6 e- in its valence shell.
As lewis acids are electron deficient, boron halides act as Lewis acid.
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