End product S of the reaction sequence is C H 3 - C H 2 B r → K C N P → H 2 O / H + Q → S O C l 2 R → ( C 2 H 5 ) 2 C d S

Here the final product S is pentan-3-one CH 3 − CH 2 Br → KCN CH 3 − CH 2 CN P → H 3 O + CH 3 − CH 2 COOH Q → SOCl 2 CH 3 − CH 2 COCl R → ( C 2 H 5 ) 2 P d C 2 H 5 C O C H 2 C H 3 P e n t a n - 3 - o n e S

Chemistry - Halogen Derivative Question with Solution | TestHub

ChemistryHalogen DerivativeNUCLEOPHILIC SUBSTITUTION REACTIONS (SN1 AND SN2), SN(NEIGHBOURING GROUP PARTICIPATION), SNIEasy2 minPYQ_2020

ChemistryEasysingle choice

End product S of the reaction sequence is
$C H_{3} - C H_{2} B r \overset{K C N}{\to} P \overset{H_{2} O / H^{+}}{\to} Q \overset{S O C l_{2}}{\to} R \overset{(C_{2} H_{5})_{2} C d}{\to} S$

Options:

Answer:

Solution:

Here the final product S is pentan-3-one
${CH}_{3} - {CH}_{2} Br \overset{KCN}{\to} \underset{P}{{CH}_{3} - {CH}_{2} CN} \overset{H_{3} O^{+}}{\to} \underset{Q}{{CH}_{3} - {CH}_{2} COOH} \overset{{SOCl}_{2}}{\to} \underset{R}{{CH}_{3} - {CH}_{2} COCl}$
$\overset{(C_{2} H_{5})_{2} P d}{\to} \underset{S}{\underset{P e n t a n - 3 - o n e}{C_{2} H_{5} C O C H_{2} C H_{3}}}$

Stream:NTA_ABHYAS_NEETSubject:ChemistryTopic:Halogen DerivativeSubtopic:NUCLEOPHILIC SUBSTITUTION REACTIONS (SN1 AND SN2), SN(NEIGHBOURING GROUP PARTICIPATION), SNI

⏱ 2mℹ️ Source: PYQ_2020

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