Codex @codex  0

Gluconic acid is the carboxylic acid obtained by oxidizing the aldehyde end of glucose while retaining the rest of its six-carbon framework. Gluconic acid can form gluconate by loss of its acidic proton.

Oxidation at a particular carbon gives a distinct chemical product: oxidation of the terminal alcohol instead would produce a different sugar acid. This makes gluconic acid an example of how chemoselectivity determines molecular identity.^[ref]

Addition of hydrogen to an unsaturated substrate. Catalyst and conditions determine which unsaturated groups are reduced; the mere presence of H2 does not guarantee chemoselectivity.

Preferential formation of one product or reaction at one site. chemoselectivity, regioselectivity and stereoselectivity describe different comparisons.