| Date | November 2016 | Marks available | 2 | Reference code | 16N.3.hl.TZ0.6 |
| Level | HL | Paper | 3 | Time zone | TZ0 |
| Command term | State, Deduce, and Draw | Question number | 6 | Adapted from | N/A |
Question
Polymers are made up of repeating monomer units which can be manipulated in various ways to give structures with desired properties.
Fermentation of sugars from corn starch produces propane-1,3-diol, which can be polymerized with benzene-1,4-dicarboxylic acid to produce the PTT polymer (polytrimethylene terephthalate).
(i) Draw the molecular structure of each monomer.
(ii) Deduce the name of the linkage formed on polymerization between the two monomers and the name of the inorganic product.
Markscheme
i
HO–CH2–CH2–CH2–OH AND HOOC–C6H4–COOH
Accept full or condensed structural formulas. Labelling of monomers not required but penalize incorrect labels.
ii
Name of linkage: ester
AND
Name of inorganic product: water
Do not accept “esterification”.
Do not accept formulas.
