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  4. What is the R and S configuration for each stereogenic center in this sugar from top to bottom ?

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Q. What is the $R$ and $S$ configuration for each stereogenic center in this sugar from top to bottom ?Chemistry Question Image

VITEEEVITEEE 2017

Solution:

From priority group arrangements we can see that carbon $1$ has $R$, carbon $2$ has $S$ and carbon $3$ has $R$ configuration (opposite to what we get, as lowest priority group $H$ is on horizontal line).

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