Explain RS notation of isomers?

Answer Posted / lisa

First you give priorities as Tanveer Anjam said. Then the
molecule is turned, so that the atom with the lowest
priority is in the back and we face prioritys 1,2 and 3 (In
our case H is in the back because its atomic number is the
lowest). Now you check if the sequence of the prioritys
from 1 to 3 are clockwise, then it's R. If the sequence is
counter clockwise it's S.

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