Question
Which of the following fluoro-compounds is most likely to behave as a Lewis base?
A.
$$B{F_3}$$
B.
$$P{F_3}$$
C.
$$C{F_4}$$
D.
$$Si{F_4}$$
Answer :
$$P{F_3}$$
Solution :
Key Idea The molecule with lone pair at centre atom, will behave as Lewis base.
In the given molecules, only $$P{F_3}$$ has lone pair at $$P$$ as shown below :
Thus, $$P{F_3}$$ acts as a Lewis base ( electron-pair donor ) due to presence of lone pair on $$P$$ - atom.
Key Idea The molecule with lone pair at centre atom, will behave as Lewis base.
In the given molecules, only $$P{F_3}$$ has lone pair at $$P$$ as shown below :
Thus, $$P{F_3}$$ acts as a Lewis base ( electron-pair donor ) due to presence of lone pair on $$P$$ - atom.