1.

Consider the following configurations (A),(B),(C ) and (D) (A) which of the following statements is not correct?

Answer»

`(A)` and `(C )` are enantiomers
`(A)` and `(B)` are enantiomers
`(A)` and `(D)` are enantiomers
`(B)` and `(D)` are identical

Solution :The priority order is `OH gtCH =CH_(2) gtCH_(3) gtH`. Let's consider the configuration `(A)`, since the LOWEST priority `(H)` is one horizontal, `H` is moved to the vertical by making any two switches preserving the configuration. The configuration is then found to be `S`.

Alternatively, the priority order in the ORIGINAL `(A)` with `H` on the horizontal is `R`, but this is wrong and the molecules is actually `S`. similarly, configuration `B` is `R` (the enantiomers), `C` is `S` (identical) and `D` is `R` (the enantiomer). THUS `A` and `C` are not enantiomers but identical compounds.


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