Specify the coordination geometry around and the hybridisation of `N` and `B` atoms in `1 : 1` complex of `BF_(3)` and `NH_(3)`.

Options

A. `N` tetrahedral, `sp^(3), B:` tetrahedral, `sp^(3)`
B. `N` pyramidal, `sp^(3), B:` pyramidal , `sp^(3)`
C. `N` pyramidal, `sp^(3), B:` planar , `sp^(2)`
D. `N` pyramidal, `sp^(3), B:` tetrahedral , `sp^(3)`

Answer

A

Explanation

The `1:1` complex of `BF_(3)` and `NH_(3)` is represented is follows.
In this complex both `N` and `B` attain tetrahedral geometry and `sp^(3)` hybridizationin the coordinately formed structure.

During coordinate bond formation hybridized state of donor doesn't change but hybridized state of acceptor changes