1-5 Identify the weakest carbon-hydrogen bond in the following diene? 1) 3) HH H HC H,C'AH CH 4) 2)

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Chapter1: Chemical Foundations
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1-5
Identify the weakest carbon-hydsogen bond in the following diene?
1)
3)
H H
H;C
H;C 4 H
CH
4)
2)
1-6
Which one of the following is not tme concerning Diels-Alder reactions?
1) The reaction is stereospecific.
2) The reaction mechanism has only one step.
3) The reaction mechanism involves a resonance stabilized carbocation.
4) The diene must be a conjugated diene.
1-7
Identify the diene used in the reaction shown below.
heat
CH,
CN
H,C
+
diene
HC,
CH,
CH2
HC
H;C
CH3
CH
CH
1)
2)
3)
4)
1-8
What is product of the following Diels-Alder reaction?
CH;
CH;O,C
CO,CH;
heat
H.
H
H;C.
Co,CH3
H;C
CO,CH3
1)
3)
Co,CH3
CO,CH;
+ enantiomer
+ enantiomer
H;C,
co,CH3
H;C.
co,CH3
2)
4)
"CO,CH3
Co,CH3
+ enantiomer
Transcribed Image Text:1-5 Identify the weakest carbon-hydsogen bond in the following diene? 1) 3) H H H;C H;C 4 H CH 4) 2) 1-6 Which one of the following is not tme concerning Diels-Alder reactions? 1) The reaction is stereospecific. 2) The reaction mechanism has only one step. 3) The reaction mechanism involves a resonance stabilized carbocation. 4) The diene must be a conjugated diene. 1-7 Identify the diene used in the reaction shown below. heat CH, CN H,C + diene HC, CH, CH2 HC H;C CH3 CH CH 1) 2) 3) 4) 1-8 What is product of the following Diels-Alder reaction? CH; CH;O,C CO,CH; heat H. H H;C. Co,CH3 H;C CO,CH3 1) 3) Co,CH3 CO,CH; + enantiomer + enantiomer H;C, co,CH3 H;C. co,CH3 2) 4) "CO,CH3 Co,CH3 + enantiomer
1
Which is most acidic hydrocarbon?
1)
2)
3)
4)
What is product of the following Diels-Alder reaction?
CH3
CH;O,C
Co,CH3
heat
H
н
H;C.
CO,CH;
H;C.
.CO,CH3
1)
3)
Co,CH;
Co,CH3
+ enantiomer
+ enantiomer
H;C.
Co,CH;
H;C.
Co,CH;
2)
4)
"CO,CH;
CO̟CH;
+ enantiomer
Which of the following dienes would you expect to be the most reactive in Diels-Alder
reactions?
A)
B)
N-H
D)
Transcribed Image Text:1 Which is most acidic hydrocarbon? 1) 2) 3) 4) What is product of the following Diels-Alder reaction? CH3 CH;O,C Co,CH3 heat H н H;C. CO,CH; H;C. .CO,CH3 1) 3) Co,CH; Co,CH3 + enantiomer + enantiomer H;C. Co,CH; H;C. Co,CH; 2) 4) "CO,CH; CO̟CH; + enantiomer Which of the following dienes would you expect to be the most reactive in Diels-Alder reactions? A) B) N-H D)
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