1.

Consider the following configuration (A),(B) and (C ). (A) Which of the following statements is correct?

Answer»

`(A)` and `R-`configuration
`(C )` has `R-` configuration
`(B)` has `R-` configuration
All `(A),(B)` and `(C )` have `(S)-` configuraiton

Solution :In `(C )`, the PRIORITY order is `H_(2)NGT COOH gt CHO gtH`. Therefore the compound is `R`. In `(A)`, the priority order is `CH_(2)CI gt CH(CH_(3))_(2) gtCH_(3) gtH`, therefore the compound si `S`. In `(B)`, the priority order is `CH_(2)OH gt CN gt C -=CH gt CH_(3)`, therefore the compound si `S`. Note that `-CH_(2)OH` has priority over `C-=N` because one oxygen atom counts before three NITROGEN atoms.


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