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Test5_Jara1 - Chem 2311 Name Fall 2008 Exam 5 v.1 Part I...

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Unformatted text preview: Chem 2311 Name Fall 2008 Exam 5 v.1 Part I. Multiple Choice. Circle the answer to each question. m-s of different protons In a compound? >(Vllhich feature in the H NMR spectrum provides informatio & n about the number of mber of signals b) integral c) splitting (id) chemIcal shift} ’4‘ 2. Which C4HgBr compound(s) gives a 13C NMR spectrum consisting of two signals? Br /|\/Br X MBr 1 ‘ 2 3 WW2 c)only2and3 d)1,2,3and4 3. How many signals appear in the proton-decoupled 13C NM spectrum f the following compound? a)6[b)7i (2)8 d)11 hat Is the y- axis mass spectrum? ' a) mass b) energy undance d) field strength “,wa Ar Br 4 R 5. What Is the major organic product obtained from the following reaction? CH30Na o H30/<1 CHaOH l 3) OH ‘30 OCH3 0) OH . 3 o &/ DC if; 0 A/ocrg mick: of the following Vethers cannot be prepared by a Williamson ether s nthesis? I b—butyl phenyl ether b) isopropyl methyl ether 0) anisole WT W q 7. What is the characteristic of a radical chain termination step? a) radicals are formed b) substitution products are formed 0) a radical reacts with a molecule to give a new radical and a new molecule I d) {We radIcaIs combme to egefl—xfi a mo ecu ? 8. Which halogen Is most useful in the regioselecitive radical halogenation of alkenes?? a) fluorine b) chlorine W‘i d) iodine ...
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