Midterm 1 Key

Midterm 1 Key - page 1 ",3i,#,";l:L*, uvl...

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page 1 Chemistry C3443 Falt 2005 Midterm #1 """,3i,#,";l:L*, uvl Instructions: (1) For some questions, you have a choice of which problem(s) to answer. For these, cross out (X) answers you do not want counted. (2) Notice that for each question, we have suggested how much time you spend on that question and indicated how many points it is worth. We suggest that you first go through the entire exam and answer the questions that are easier for you and then go back to the questions that are harder for you. (3) Put your name at the top of each page. (4) Unless indicated otherwise, all structures should be skeletal (line) drawings. The exam contains 11 pages (including this face page). The total number of points is 100. TOTAL: /100 L I m. ry. V. 1. 2. 3.
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page 2 L FK506 is apolyketide naturai product that is a potent immunosuppressant. Circle five different functional groups that are present in this molecule and narne them. (5 rnirnrtes, 1O points total) MeO lVleO,, a$€4- Alrerre- tltdtnwy f€16n-- alcoino\ :
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II. For the following compounds (a) write Lewis dot structures, (b) indicate the overall charge on the molecule, (c) write all majorresonance forms, and (d) indicate all formal charges.on individuat atoms. Choose 2 of the 3 problems. (15 minutes,30 points total) 1. ^\ tl H .o. H3N^No, o) JJ:A/ l c-'Hn'' ' b) ovev'atr- cJno.nry- = *t HU o, f) a "o ;,O c) u.$+fr''{.^ (--+ 11,rfl^fu"_-aI ?> ilrfr-. Rii'* -O;.G> rr''? '=O,O \- ( nStw 'ei, P-1-'o:o (i-"C't O'P-uo'Q 6p \rvz 2.
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This test prep was uploaded on 04/07/2008 for the course CHEM C3443 taught by Professor Cornish during the Fall '08 term at Columbia.

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Midterm 1 Key - page 1 ",3i,#,";l:L*, uvl...

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