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7. Alcohol, phenol and ethers — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistry7. Alcohol, phenol and ethers1 Mark
MCQ
The reagent used for the preparation of higher ether from halogenated ethers is
  • A
    conc. ${H_2}S{O_4}$
  • B
    Sodium alkoxide
  • C
    Dry silver oxide
  • ✓
    Grignard reagent
✓

Answer

Correct option: D.
Grignard reagent
d
(d)$\underset{\begin{smallmatrix} 
 \text{Methoxymethane} \\ 
 \,\,\,\text{(Lower}\,\text{ether)} 
\end{smallmatrix}}{\mathop{C{{H}_{3}}OC{{H}_{3}}}}\,\xrightarrow{C{{l}_{2}}/hv}\underset{\alpha -\text{Chlorodimethyl}\,\text{ether}}{\mathop{C{{H}_{3}}OC{{H}_{2}}Cl}}\,$

$\underset{-MgBr(Cl)}{\mathop{\xrightarrow{C{{H}_{3}}MgBr}}}\,\underset{\begin{smallmatrix} 
 \text{Methoxyethane} \\ 
 \,\,\text{(Higher}\,\text{ether)} 
\end{smallmatrix}}{\mathop{C{{H}_{3}}OC{{H}_{2}}C{{H}_{3}}}}\,$

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