A) an alkyl halide is treated with sodium alkoxide
B) an alkyl halide is treated with sodium
C) an alcohol is heated with cone. \[{{H}_{2}}S{{O}_{4}}\]at \[\text{130}{{\,}^{\text{o}}}\text{C}\]
D) None of the above
Correct Answer: A
Solution :
Williamsons synthesis? It is the best method for the laboratory preparation of both simple and mixed ethers and involves the action of sodium alkoxide on a suitable alkyl halide \[\underset{\text{ethyl}\,\text{bromide}}{\mathop{{{C}_{2}}{{H}_{5}}-Br}}\,+{{C}_{2}}{{H}_{5}}ONa\xrightarrow{{}}\] \[\underset{\text{diethyl}\,\text{ehter}}{\mathop{{{C}_{2}}{{H}_{5}}-O-{{C}_{2}}{{H}_{5}}}}\,+NaBr\] \[{{C}_{2}}{{H}_{5}}-Cl+{{C}_{6}}{{H}_{5}}-ONa\to \] \[\underset{\text{ethyl}\,\text{phenyl}\,\text{ether}}{\mathop{{{C}_{6}}{{H}_{_{5}}}-O-{{C}_{2}}{{H}_{5}}}}\,+NaCl\]
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