Question

There are several reagents that can be used to effect addition to a double bond, including: acid and water, oxymercuration–demercuration reagents, and hydroboration–oxidation reagents. Inspect the final product and select all the reasons why oxymercuration–demercuration was chosen to effect the following transformation instead of the other reagents.

a) Oxymercuration–demercuration reagents prevent carbocation rearrangements.

b) Oxymercuration–demercuration reagents favor carbocation rearrangements.

c) Addition with acid and water as reagents avoids carbocation rearrangements.

d) Addition with acid and water as reagents allows carbocation rearrangements.

e) Hydroboration–oxidation reagents yield the anti-Markovnikov product of addition.

f) Hydroboration–oxidation reagents yield the Markovnikov product of addition.

g) The reaction requires the Markovnikov product without carbocation rearrangement.

h) The reaction requires the anti-Markovnikov product with carbocation rearrangement.

There are four correct answers.

Answer 1

correct answers:

a) Oxymercuration–demercuration reagents prevent carbocation rearrangements.

d) Addition with acid and water as reagents allows carbocation rearrangements

e) Hydroboration–oxidation reagents yield the anti-Markovnikov product of addition

g) The reaction requires the Markovnikov product without carbocation rearrangement.

explanation:

these are direct statements .

markovnikove product we need . for this Oxymercuration–demercuration is most suitable . and without carbocation rearrangement . acid -water favours carbocation rearrangement. and BH3-THF favour anti markovnikove product .

so the above four answers are correct