April 22, 2006

April 22, 2006 - CHEM 2370 Dr. S. A. Dandekar April 22"...

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CHEM 2370 Dr. S. A. Dandekar April 22" ,2006 Lxalil 4 A (100 points) Select the best answer from the given choices for ANY 20 of questions 1-25. ( 5 points each) You may answer extra questions, without penalty, for possible extra credit. 1. Which product(s) would be produced by acid-catalyzed dehydration of the following alcohol? CH3 I HA, heat CHZ<CHZCHZCH~ and CH~C<HCH~CH~ CH3CHCH=CHCH3 CH~CHCH~CH-CH~ CH2 II 2. Which reagent or test could be used to distinguish between cyclopentane and ei cyclopentene? A) concd &So4 J B) Br21CC14 KMn04 (aq), OH- More than one of the above None of the above
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CHEM 2370 Exam 4 A April 22", 2006 3. The addition of bromine to cycIohexene would produce the compound(s) represented by structure(s): e I i; &" D) I alone E) I11 alone 4. hich alkene would you expect to be the major product of the following dehydration? 5. In the structure shown, Hb and H, are classified as: ($5 I /' ("3 equivalent protons. 't-4 /;i-c= c, . diastereotopic protons. \ d' c i\ j \CS+ homotopic protons. 4 zL 11 -', i DJ isomeric protons. F 4 E) enantiotopic protons. ci-4 /
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ha111 4 ii April 22"". 2UOo 6. Which of these compounds belongs to the class of substances commonly known as "halohydrins"? A) ICH2CH20H HOCHzC4 I JT 142 0 What is the chief product of the acid-catalyzed hydration of 2-methyl-2-butene? CH3 ( \\, I , I CH3C-CHCH3 (\, =-= C-J, - GI[ L-~\l 5 I I 3 [ !\ HO OH 3 8. Which is a possible structure for.ash an inde f hydrogen deficiency equal to 3 and which absorbs one molar equivalent of hydrogen when treated with C__ ---_-a47 ------,, d hydrogen and a platinum catalyst? n\k ( l\k, Page 3
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CHEM 2370 Exam 4 A Aprll22"".2~)6 9. A rnelliod for converting m-2-butene into pure &-2-butene would be: A) trans-2-Butene + ~~0' " d@ heat (l\'< 1, ( 6 r \C 1% 2 NaNH2 + Br2 -------3 product CCl 4 liq. NH3 H2 (15 Ni2~ (P-2) c) 2 + Brz + CClg Na pro duct D) Niz B + HZ ---------+ (P-2 1 E) None of these .\ aj 10.
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This note was uploaded on 04/14/2008 for the course CHEM 2370 taught by Professor Dandekar during the Fall '07 term at North Texas.

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April 22, 2006 - CHEM 2370 Dr. S. A. Dandekar April 22"...

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