Show a portion of the PVA molecule containing at least 2 monomer molecules, and make the repeat unit easy to recognise.
Use the information given to predict a possible structure for C and place it in the box above. Ester B can be hydrolysed in the normal way, as shown by the equation: B + H$_2$O $\rightarrow$ CH$_3COOH$ + C (C$_2$H$_4$O).
After C is isolated from the product mixture, it is observed that it does not decolourise Br$_2$(aq), yet it does give a pale yellow precipitate with alkaline aqueous iodine. Propose a structure for C that is consistent with this evidence.
Suggest a confirmatory test for the functional group in the structure you have drawn in (iii). Your response should give both the reagent used and the observation expected.
In the formula above, add brackets [ ] around the atoms that form the polymer repeat unit.
Name the functional group present in polymer D.
Suggest and draw the structure of the monomer, E, that could produce this polymer.
What type of polymerisation is used to make polymer D from its monomer?
What is the relationship between the repeat unit of polymer D and the repeat unit of PVA?
Name the type of stereoisomerism exhibited by compound E.
Suggest structures for F and G, and name the type of stereoisomerism they show.