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(A) The reaction of Grignard reagents $(RMgX)$ with acetaldehyde $(CH_3CHO)$ followed by acidic hydrolysis $(H_3O^+)$ yields secondary alcohols.$(i) C

Vedclass · Accepted Answer

$(i) 1-	ext{phenylethanol}, (ii) 1-	ext{cyclohexylethanol}, (iii) 3-	ext{methylbutan-2-ol}$

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(A) The reaction of Grignard reagents $(RMgX)$ with acetaldehyde $(CH_3CHO)$ followed by acidic hydrolysis $(H_3O^+)$ yields secondary alcohols.$(i) CH_3CHO + C_6H_5MgBr$ $ightarrow CH_3CH(OMgBr)C_6H_5$ $\xrightarrow{H_3O^+} CH_3CH(OH)C_6H_5$ $(1-	ext{phenylethanol})$$(ii) CH_3CHO + C_6H_{11}MgBr$ $ightarrow CH_3CH(OMgBr)C_6H_{11}$ $\xrightarrow{H_3O^+} CH_3CH(OH)C_6H_{11}$ $(1-	ext{cyclohexylethanol})$$(iii) CH_3CHO + (CH_3)_2CHMgBr$ $ightarrow CH_3CH(OMgBr)CH(CH_3)_2$ $\xrightarrow{H_3O^+} CH_3CH(OH)CH(CH_3)_2$ $(3-	ext{methylbutan-2-ol})$Thus,the correct products are $1-	ext{phenylethanol}$,$1-	ext{cyclohexylethanol}$,and $3-	ext{methylbutan-2-ol}$.

Predict the products of the following reactions with $CH_3CHO$:
$(i) CH_3CHO + C_6H_5MgBr$
$(ii) CH_3CHO + C_6H_{11}MgBr$
$(iii) CH_3CHO + (CH_3)_2CHMgBr$
Followed by acidic hydrolysis in each case.

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Predict the products of the following reactions with $CH_3CHO$:$(i) CH_3CHO + C_6H_5MgBr$$(ii) CH_3CHO + C_6H_{11}MgBr$$(iii) CH_3CHO + (CH_3)_2CHMgBr$Followed by acidic hydrolysis in each case.