Test problems for Chapter 18 with answers

Test problems for Chapter 18 with answers - 1 Which product...

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Page 1 1. Which product would you not expect in the crossed aldol reaction between acetaldehyde and propionaldehyde? H 3 C C O H CH 2 C O H H 3 C ? cat. NaOH H 2 O + A) CH 2 C O H H 2 C C OH H H 3 C B) CH C O H H 3 C C CH 3 H OH C) CH 2 C O H H 3 C C OH H D) CH C O H H 3 C C OH H CH 3 E) CH C O H H 2 C C OH H CH 3 H 3 C Ans: B
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Page 2 2. What organic molecule would you expect to be present in significant amounts under the following conditions? O CH 3 H cat. KOD ? only ( S ) enantiomer excess D 2 O A) DO CH 3 H OH B) O CH 3 D C) O D) O CH 3 D racemic E) O CD 3 D racemic Ans: D
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Page 3 3. What reactants would be used to produce cinnamaldehyde? CHO ? cat. NaOH H 2 O CHO + CH 3 CHO CHO H C CHO O + CH 3 O + CH 2 =O O CHO + CHO H 3 C C CHO O +
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Page 4 4. What would you expect to result from the following reaction? O ? 1. (CH 3 ) 2 CuLi 2. H 2 O O OH OH CH 3 O O
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Page 5 5. Indicate to which side, if any, the following equilibrium lies: O O H + or HO -
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Page 6 6. What would be the expected product of the following reaction? CH 3 O HC CH 2 O CH 3 + CH 3 O - Na + CH 3 OH ? heat A) O B) O C) O D) O E) O Ans: A
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Page 7 7. What major product would you expect from the following reaction? O Na + - OCH 3 CH 3 OH, heat ? CH 2 =O HO OCH 3 CH 2 O CH 3 CH 2 O O
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