| Date | May 2016 | Marks available | 2 | Reference code | 16M.3.hl.TZ0.23 |
| Level | HL | Paper | 3 | Time zone | TZ0 |
| Command term | Deduce | Question number | 23 | Adapted from | N/A |
Question
Opiates have been used for thousands of years to alleviate pain. The structures of opiates are found in section 37 of the data booklet.
Using sections 26 and 37 of the data booklet, deduce, giving two reasons, which spectrum is that of morphine and which is diamorphine.
Markscheme
spectrum A is diamorphine because it has a «strong» peak at 1700–1750 «cm–1»
OR
spectrum A is diamorphine because it has a C=O/carbonyl (group)/ester
spectrum B is morphine because it has a «strong broad» peak at 3200– 3600 «cm–1»
OR
spectrum B is morphine because it has a –OH/hydroxyl (group)
Award [1 max] for “spectrum A is diamorphine AND spectrum B is morphine” OR correctly identified peaks associated with the correct compounds (eg. C=O for diamorphine etc.).
Accept “alcohol/hydroxy” for “hydroxyl” but not “hydroxide”.
