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Shweta Thakur posted an Question
January 09, 2021 • 21:00 pm
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30 points
30 points
- IIT JAM
- Chemistry (CY)
Plz explain this encircled portion... ther chch= ch2 lch ch (iii) (ii) tautomerism by r borodet sotes olecsdoo oh cha ch3 ch-ch=
CH2 H CH CH3 CH3 CH3 CH, ČH, CH3 475 K CH2 Allyl 2, 6-dimethylphenyl ether CHCH= CH2 LCH CH (III) (II) Tautomerism by r borodet sotes olecsdoo OH CHa CH3 CH-CH= CH2 4-Allyl-2,6-dimethylphenol Thus in apara-rearrangement, one inversion is followed by another inversion and hence there is no net inversion in the position of the substituent w..t the starting compound. For example, OH O-CH2-CH CH-CH CH3 CH CH3 CH3 475 K OL ČH-CH= CH-CH3 Crotyl 2, 6-dimethylphenyl ether onopproe 4-Croyl-2, 6-dimethylphenol 2. Ester formation-Acylation. When nhenals are trantad uith nait
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Priyanshu kumar
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This one also you determined by isotopic labeling...first inversion leads to different product(attched carbon) and second inversion leads to same product...i.e ortho me inversion hoga or jb para hoga to fr inversion hoga to no net inversion ho jayega
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Iske mechanism se pata lg jayega shweta...
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see shweta first me ortho product hua to inversion hua kyunki alpha carbon attached tha O se wo carbon ab last me chala gya hai or gamma carbon attached ho gya hai...again jb inversion hoga para product me then alpha attached ho jayega para carbon se...means no net change
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ok sir
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sir
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sir
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sir
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Dinesh khalmaniya 1 Best Answer
Meaning is that, in first mechanism, two times group ka transfer hua he or each time inversion hota he to job position first me thi vhi para pr rhegi mean no change. Check the below mechanism with marked carbon.
shweta, mechanism ko smjhne k liye ap allylic carbon ko mark kro or dekho ki para pr konsa carbon attached ho rha he. apko mechanism apne aap smjh me aa jayegi
see the mechanism
ok