Question

Draw the expected final product when 2-bormo-4,4,5-trimethylheptane is subjected to the following sequence of the reagents: 1) Mg/Et2O 2) CO2 3) H3O+ ??? Please , thank you

Answer 1

Explanation:

It's a Grignard reaction. First you use the magnesium to react with the bromine and form the magnesium halide `RMg^+Br^-`. Now that you have the Grignard reagent you can use it as a nucleophile so it will attack the carbon in the `O=C=O` molecule which is deficient in electrons because of the oxygens higher electronegativity. And finally you use the acid to protonate the `O^-` into a `OH` group, getting a carboxylic acid.