Why do boron halides form addition compounds with ammonia and ami… - Vidyadip

Question

Why do boron halides form addition compounds with ammonia and amines?

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Answer

It is because they are electron deficient i.e. need a pair of electron to complete their octet. $\mathrm{NH}_3$ and $\mathrm{RNH}_2$ have lone pair of electron which can be donated to boron halides.

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