IIT JAM
Shweta thakur Asked a Question
November 10, 2020 9:05 ampts 30 pts
  • IIT JAM
  • Chemistry (CY)

Plz explain this reaction .... h cho ho-c- h vinyl alcohol (tu7stable) m hth opnc h-so when distilled with conc hso. ethvlene glvcol gives 1

H Anhyd. ZnCl CH2 CH Tautomerises H-COH (-H,0) CHOH CHO HO-C- H Vinyl alcohol (tu7stable) m Hth opnc H-SO When distilled with conc HSO. ethvlene glvcol gives 1 4-dioYane which is Acetaldehyde H
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  • Priyanshu kumar Best Answer
    check this
    • cropped2633310964590279682.jpg
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    Priyanshu kumar
    vinyl alcohol unstable hai to tautomerisation hoga or acetaldehyde banega
  • Dinesh khalmaniya thankyou
    -OH is very poor leaving group. Anhy. ZnCl2 is Lewis Acid and add to -OH increase the leaving group ability and further elimination of H and OH yo give alkene
    • cropped8403523059343413028.jpg
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    Dinesh khalmaniya
    anhydrous ZnCl2 is dehydrating agent and remove H2O