{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Midterm2140AFall 06Key_Ternansky

Midterm2140AFall 06Key_Ternansky - Chemistry 140A Fall 2006...

Info icon This preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Chemistry 140A Fall, 2006 Second Midterm Exam-250 points 11/14/06 DO NOT OPEN THIS EXAM UNTIL INSTRUCTED TO DO SO ..... FILL OUT THE FOLLOWING INFORMATION NOW : . YOUR NAME (Print): ________Ima Key_________________ PID: __________________________________________________ SIGNATURE: __________________________________________ ID checker initials: ______________________________________ If you wish to have any answers considered for a re-grade, your exam must be completed in INK ….also, no ALTERED answers will be considered for re-grade.
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
1. (42 points) For the following molecules, assign “R” or “S” to each of the numbered atoms. If the atom is not chiral, write “NC” in the space. Next, indicate whether the molecule is chiral, achiral or meso by circling the appropriate designation. Note that meso is a special case of achiral and must be designated where appropriate. (1 pt each R, S, or NC; 2 pts each chiral, achiral, meso) H O O H N H OH H 3 C H D HO 2 C CO 2 H HO OH O H H Br Br Br Cl Cl H OH H H CH 3 H 3 C CH 3 CH 3 H Et CH 3 Br H NC R S NC S R R NC NC NC R S S S NC NC R R S S S S R R R NC 1 2 3 4 chiral achiral meso 1: 2: 3: 4: 1 2 3 1 2 3 4 1 2 3 4 5 chiral achiral meso chiral achiral meso 1: 2: 3: 4: chiral achiral meso 1: 2: 3: 4: 5: 1 2 chiral achiral meso 1: 2: 1 2 chiral achiral meso 1: 2: 1 2 3 1 2 chiral achiral meso 1: 2: chiral achiral meso 1: 2: 3: (a) (b) (c) (d) (e) (f) (g) (h) 1: 2: 3: 4: 4
Image of page 2
2. (25 points) The following questions refer to the compounds from the previous question (question #1): (3 points) is molecule(g) drawn in the most stable conformation? YES or NO (5 points) provide the IUPAC name for compound (e): (3 S ,4 S )-3,4-Dibromo-3,4-dimethylhexane (no partial credit) (5 points) draw the enantiomer of molecule (h) on the template provided H 3 C Br H H Et CH 3 1 2 (no partial credit) (4 points) what is the maximum number of stereoisomers for compound (b)?
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}