Which of the following is not a nucleophile?
Correct answer: D. Br2
- A. NH3
- B. HO
- C. HC = CH
- D. Br2
Explanation
The electron rich part of the double bond causes a dipole to form meaning that bromine becomes electron deficient and therefore becomes the electrophile (hence electrophillic addition) hence the answer is D. Rest of the options are incorrect as they have lone pair of electrons or an electron rich double bond (in case of alkenes) which makes them nucleophiles.
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About Alkyl Halides
Alkyl halides are named and related to their carbon-halogen structure, polarity and reactivity. The key reactions are nucleophilic substitution by SN1 and SN2 mechanisms and elimination by E1 and E2 mechanisms, including how substrate structure, nucleophile, base, solvent and temperature influence substitution versus elimination.
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