CHEM 250 Midterm: Chem250-Midterm(Fall2012)-Answers.pdf
Document Summary
No electronic devices (calculators, phones, pdas) are allowed (put. Including this cover page, there are 17 pages in this exam (plus 3 scratch pages and. An optscan sheet is provided for the multiple choice section them away!) Please also fill in your student number (8 digits) on the optscan sheet accurately. Answers to the remaining parts of the exam should be provided on the exam copy itself. Part ii (10 marks: using iupac rules, including r/s and e/z where necessary, name the following compounds : (3e, 6r)-4-bromo-6,7-dimethyl-3-octene (6s,7s)-6-ethyl-7-methyl-1,4-cycloheptadiene. 3: draw the correct structure of (2e, 5r, 6r)-5-chloro-6-isopropyl-2-nonene, using the chair diagram below, draw the most stable chair conformation of cis-1-bromo- 4: complete the fischer projection (right) of the molecule shown in the newman projection (on left). Make sure that the stereochemistry is correct ! For each of the pairs shown, determine the relationship between them as: identical/meso compounds b. enantiomers, diastereomers.
