JEE Main Chemistry question

Specify the coordination geometry and hybridisation of the N and B atoms in a 1:1 complex of and :

(A)N: tetrahedral, ; B: tetrahedral, Correct
(B)N: pyramidal, ; B: pyramidal,
(C)N: pyramidal, ; B: planar,
(D)N: pyramidal, ; B: tetrahedral,

Answer: (A)

Solution

In the adduct , nitrogen donates its lone pair to boron, so nitrogen now has four bonding pairs and no lone pair, making it tetrahedral (); boron simultaneously goes from three bonding pairs (trigonal

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Question ID VK-138604