Alkyl iodides cannot be prepared directly by the halogenation of alkanes because?
Correct answer: D. All of these options are correct
- A. Iodine reacts slowly
- B. Iodine reacts reversibly
- C. HI formed reduces alkyl iodide again to starting material
- D. All of these options are correct
Explanation
Alkyl iodides cannot be prepared directly by the halogenation of alkanes because iodine reacts slowly and reversibly as well as the hydrogen iodide formed during the reaction reduces alkyl iodide again to starting material. So we get the alkyl iodide simply by treating alkyl chloride or alkyl bromide with sodium iodide as: RCl + NaI---------------------> RI + NaCl
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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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