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Adarsh Mishra posted an Question

June 05, 2020 • 19:17 pm

30 points

IIT JAM
Chemistry (CY)

Cooh h ch, sh tind r/s cooh pnd ris hn- -h

1 Answer(s)

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Dinesh khalmaniya 1

please Mark is best if you get it
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Dinesh khalmaniya 1

check it very simple language
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Suman Kumar

See this
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2nd question that ch group is it methyl or something else
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Dinesh khalmaniya 1

hope this will help you 🙏
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sit plz explain (1) again. I'm unable to decide the priority order
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in COOH C is directly bonded with O right?? and CH2SH , C is directly bonded with H and S both but we will give priority to high at no. atom so in CH2SH we concluded that C is directly bonded to S. now compir it with COOH where C is directly bonded to O. we know that if first atom is same then we check next higher priority atom. in COOH it is O while in CH2SH it is S
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Dinesh khalmaniya 1

in (2) priority order is -NH2>-cooh>ch3 clockwise but h is at horizontal so ans reverse so it is S
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Dinesh khalmaniya 1

In (1) priority order is -NH2> -CH2SH>-COOH anticlockwise rotation but here H is at horizontal so ans will be reversed so it is R configuration
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sir how the priority of CH2SH is greater than COOH?
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make the structure of -COOH and CH2SH you will see that in COOH first C is directly bonded to O while in CH2SH first C is directly bonded to S and we know that higher the atomic no. more is the priority
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did you get it??
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wait once i get home I'll try to explain you on the paper
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what nomenclature we use in Amino acids. (1) R/S (2) D/L
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D/L
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Dinesh khalmaniya 1

1 -R and 2-S
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T