Assigning R & S Configurational Prefixes
For 2-hydroxybutanal and 2,3-dibromobutanoic acid various
configurational structures (A through L) are drawn below. In
the six following questions you are asked to select those structures that
satisfy the specified condition. Note that the numbering of the dibromoacid
starts at the carboxylic acid carbon atom (#1). Enter letters (A
through L), corresponding to your selections, in each answer box. If
there is no structure that fits the description enter an X in the
answer box.
Do not enter superfluous characters, since they will be
counted as incorrect answers.
| 1. Which hydroxybutanal
structures have a R configuration? ....... 2. Which hydroxybutanal structures have a S configuration? ........ 3. Which dibromo structures have a 2-(R), 3-(R) configuration? ... 4. Which dibromo structures have a 2-(R), 3-(S) configuration? ... 5. Which dibromo structures have a 2-(S), 3-(S) configuration? .... 6. Which dibromo structures have a 2-(S), 3-(R) configuration? .... |
