IUPAC Nomenclature and Lewis Acid and Base

Question

In the following image: https://ibb.co/KFRL4GL

a) How do I go about deducing the IUPAC name for both substance A and Substance B?

b) How will I know if there will be reaction between the two substances?

c) And how will I know which substance will be the Lewis acid and which will be the Lewis base?

Answer 1

a) substance A is the anti-inflammatory drug ibuprofen

which, I think, has the IUPAC name 2-(4-isobutylphenyl)propanoic acid. The process for naming it starts out with picking the three carbon chain containing the CO₂H group as the parent chain. This is why the name ends with "propanoic acid." There is a subtituted phenyl group attached to the 2 position of the chain, so the IUPAC name starts with "2-" and the substituted phenyl (in parenthesis) is cited in the IUPAC name after the 2- as "(4-isobutylphenyl)." The "4-isobutyl" part indicates that there is an isobutyl group attached to the 4- position of the phenyl group.

Substance B is sodium bicarbonate which, I think, has the IUPAC name sodium hydrogencarbonate.

b) How will I know if there will be reaction between the two substances?

Substance A is an acid (because of the CO₂H group, which can donate a proton) and Substance B is a base because its negatively charged oxygen atom can accept a proton. Since our reactants are acid and base there will be a reaction where the CO₂H group of Substance A gives up a proton to become a CO₂^– group and HOCO₂^– of Substance B accepts a proton to become HOCO₂H.

c) A Lewis base is defined as an electron pair donor. Substance B donates an electron pair from its negatively charged oxygen atom to form a bond to the proton from substance A, so Substance B is a Lewis base.

A Lewis acid is defined as an electron pair acceptor. The proton on substance A accepts an electron pair from substance B's negatively charged oxygen atom, so substance A is a Lewis acid.