The geometry around boron in the product 'B' formed from the following reaction is

Question

Canvas Classes · Accepted Answer

Step 1:

Actually:

So  (diborane)

Step 2:

Product B =  (trimethylamine-borane adduct)

In this adduct,  donates its lone pair to the empty p-orbital of , making B sp³ hybridized → tetrahedral geometry.

Answer: Option (2) — tetrahedral

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