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  4. Which of the following is threo isomer?

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Q. Which of the following is threo isomer?Chemistry Question Image

Punjab PMETPunjab PMET 2011

Solution:

Erythro and threo prefixes are used in systems containing two such asymmetric carbon atoms in which two substituents on each carbon are identical and third is different. Thus, in such cases, the isomer having identical groups on the same side is called erythro and that having identical groups on the opposite side is called threo image