Which of the following fluoro-compound is most likely to behave as a Lewis base?

Options

A. `BF_(3)`
B. `PF_(3)`
C. `CF_(4)`
D. `SiF_(4)`

Answer

D

Explanation

Key Idea - The molecule with lone pair at centre atom, will behave as Lewis base. In the given molecules, only `PF_(3)` has lone pair at P as shown below :

Thus, `PH_(3)` acts as a Lewis base (electron-pair donor) due to presence of lone pair on P-atom.