Consider the following reactions:

(i)

(ii)

(iii)

'x', 'y' and 'z' in these reactions are respectively:

Question

Consider the following reactions:

(i)

(ii)

(iii)

'x', 'y' and 'z' in these reactions are respectively:

Canvas Classes · Accepted Answer

(i) Glucose reacting with alcohol and dry HCl forms a methyl glucoside (an acetal). This reaction consumes the anomeric hydroxyl group. Four free hydroxyls remain, requiring 4 eq of acetic anhydride to acetylate ().
(ii) Reduction with  converts the aldehyde in open-chain glucose to a primary alcohol, yielding sorbitol. Sorbitol has 6 hydroxyl groups in total, demanding 6 eq to fully acetylate ().
(iii) Glucose normally has exactly 5 free hydroxyl groups (one anomeric, four regular), so reacting

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