Which one of the following is an electrophile?
Correct answer: B. CH4
- A. Br-
- B. CH4
- C. NH3
- D. H2O
Explanation
An electrophile is a species that lack electrons or has a positive charge on it. Br- is a nucleophile, along with H2O and NH3. CH4 is neither a nucleophile nor an electrophile. However, its radical, -CH+3 has electrophilic properties. So, out of all options, B option is the most suitable one.
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About Bronsted-Lowry and Lewis Concepts
The Brønsted-Lowry concept defines acids as proton donors and bases as proton acceptors, producing conjugate acid-base pairs. The Lewis concept extends the idea to electron-pair acceptors and donors, so compounds such as BF3 and NH3 can be treated as acid and base even without proton transfer, unlike the Arrhenius definition.
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