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Identify (A), (B) and (C ). underset((...

Identify (A), (B) and (C ).
`underset((C_(5)H_(10)))underset("Isomeric alkene")((A),(B),(C),)overset(H_(2)+Pt)rarr`2-Methyl butane
(A) and (B) `overset("Oxymercuration")underset(underset((O.M.D.))("demercuration"))rarr` Same `3^(@)` alcohol
(B) and (C) `overset("Hydroboration")underset(underset((H.B.O.))("oxidation"))rarr` Different `1^(@)` alcohol

Text Solution

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First, write the structure of `2-` methyl butane `:` it forms only three possible akenes out of the three isomer, `I,II, ` and `III,` which are `(A), (B)` or `(C)` .

Write products of `I, II,` and `III,` with `O.M.D.` and `H.B.O.` and compare with the data available to know which is `(A)` or `(B)` or `(C)`.
`(O.M.D.implies` Markovnikov's addition)
`(H.B.Oimplies`Anti - Markovnikov's addition)

From the given data `II` or `III` can `(A)` or `(B)` (they give the same `3^(@)` alcohol on `O.M.D.` reaction). So, `I` is definitely `(C).`
` :. IimpliesC`
`I` and `III` on `H.B.O.` reactions give different `I^(@)` alcohol.
So, `III` is `B`.
`Iimplies (C)`

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