30cm2k - Ktj Name (Last, First, MI): Student ID Number: My...

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Unformatted text preview: Ktj Name (Last, First, MI): Student ID Number: My TA is (Circle one): Phil Haussmarm or Luis Campos Chem 30C Fall 2005 Midterm # 2 Monday, November 21 Problem # 1 ***Do not open this exam until instructed to do so*** ***Write all answers in the boxes or spaces provided*** -8 Pages Follow— Problem 1. Draw the major product in the box provided. For a multi—step synthesis, give the final product only, i.e. do not draw intermediates. For Diels-Alder reactions, assume that all rules and preferences apply. (3 points each) a. OMe <5 __ CN heat + /—/ —’ b. Br2, FeBr3 —> N\ CH3 0. 1 eq. Br2, -78 °C —--—_—> (1. N02 NaOCH3, 70 °C ——-—-—> CH30H F CI -pr0blem I continued on next page— OH 0'2, FeCla ————> C l Problem 2. Give the product in the box provided. (4 points per box) 0H Zn(Hg) /\/\l/UH HCl soc12 Problem 3. The following product was formed by a Diels-Alder reaction. In the box provided draw the starting material(s) used to prepare the Diels-Alder adduct. ( 6 points ) Hacooc HSCOOC Problem 4. You are hired to test the concentration of compound X in the Los Angeles drinking water. You know that X has a molar absorptivity (a) of 100 M'lcm'l. Using a UV—VIS spectrometer that has a sample cell 1 cm wide you get an absorbance of 1000. What is the concentration of the sample? Be sure to show and label the equation you used to do the calculation. (6 points) BQeV ’meb-e/i— La La 3 SLOW/Lop anVi H In Q :1 (m @a'flxurtjflm r’A 7 foot} A % i (oom"cwf‘>< (CM Problem 5. In the box below provide a reasonable synthesis for the following transformation starting from toluene. High yielding syntheses with the least amount of steps will receive the most points. Assume that multiple products can be separated. (12 toluene ————-> d NH2 points) Problem 6. In the box below provide a reasonable synthesis for the following transformation starting from nitrobenzene. High yielding syntheses with the least amount of steps will receive the most points. Assume that multiple products can be separated. (12 points) Cl Problem 7. In the box below provide a reasonable synthesis for the following transformation starting from benzene. High yielding syntheses with the least amount of steps will receive the most points. Assume that multiple products can be separated. (14 points) Cl Cl Wot (’t'tzghw/ Problem 8. In the box below provide a reasonable synthesis for the following transformation. High yielding syntheses with the least amount of steps will receive the most points. (14 points) OH OH ...
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30cm2k - Ktj Name (Last, First, MI): Student ID Number: My...

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