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Which of these is least likely to act as...

Which of these is least likely to act as Lewis base?

A

`CO`

B

`F^(-)`

C

`BF_(3)`

D

`PF_(3)`

Text Solution

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The correct Answer is:
C
Electron rich species are called Lewis base. Among the given, `BF_(3)` is an electron deficient species, so have a capacity of electron accepting instead of donating. That's why it is least likely to act as a Lewis base. It is a Lewis acid.
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