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Unformatted text preview: CHEMISTRY 140B NAME (please print) EXAM 1 (C P 10, 11, 12; V&S 5 TH E D ) FIRST LAST F EB 4, 2008 SIGNATURE ID NUMBER LAST NAME OF PERSON SEATED TO YOUR RIGHT : LAST NAME OF PERSON SEATED TO YOUR LEFT : DO NOT OPEN THE EXAM UNTIL YOU ARE TOLD TO DO SO . − Please sign your name on the top of pages 1 through 5. − Please check that you have 8 pages (including this one; page 8 is blank for your scratch work). Page 6 and 7 contain tables of NMR and IR data.- Answer only in the space provided. Do not write answers on the back of a page. _____________________________________ Question Points Score _____________________________________ 1. 40 _____ 2. 15 _____ 3. 25 _____ 4. 20 _____ _____________________________________ Total 100 _____ _____________________________________ H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn NAME:________________________________ 2 1a. (16 pts) On the lines provided, indicate the number of hydrogen and carbon environments for each molecule (assume all spectra are recorded at room temperature): H C H C H C H C Cl NH 2 NH 2 Br HO H 3 2 3 2 2 2 6 4 1b. (12 pts) On the line provided, indicate the number of triplets expected in the 1 H NMR spectrum of each molecule. Assume that hydrogens in two different environments will exhibit different coupling constants to hydrogens in a third environment. Also assume that allylic and geminal couplings will be observable.that allylic and geminal couplings will be observable....
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- Summer '06
- Chemistry, Nuclear magnetic resonance, Ether