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p-Block Elements – I — Chemistry STD 12 — Question

Tamilnadu BoardEnglish MediumSTD 12Chemistryp-Block Elements – I3 Marks
Question
Why borontrifluoride is act as lewis acid? Explain the react between $BF_3$ and ammonia?
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Answer

$BF_3$ is an electron deficient compound and accepts electron pairs to form coordinate covalent bonds. Therefore, borontrifluoride is act as lewis acid. When $BF_3$ reacts with ammonia to form complex.
$BF _3+ NH _3 \rightarrow F _3 B \leftarrow NH _3$

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