Ochem

[RING12]

can some one explain this to me, Please!!1


I get 2R,3R but the answer is 2S,3S!!!!!
l

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[Troyvdg]

can some one explain this to me, Please!!1


I get 2R,3R but the answer is 2S,3S!!!!!
l

this fischer projection shows the lowest priority group (hydrogen) pointing at you. Remember that when determining if R or S, the lowest priority group must always be in back. When you encounter a frischer projection with the lowest priority group in front, the R/S value you determine for the carbon will always be the opposite.

hope this helps