Chemical Forums
Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: tranceaddix on February 04, 2008, 11:02:07 AM
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Hello, I need help on these study questions; so I can no answers and then try to derive them myself. Thanks alot! Orgo 2 is really killing me =(
1.
(Points: 1)
2-butyne reacts with excess HBr in the presence of HOOH to yield
1. 1,1-dibromobutane
2. 1,2-dibromobutane
3. 2,2-dibromobutane
4. no reaction
5. none of the above
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2.
(Points: 1)
1-butyne reacts with 1)Sia2BH 2)H2O2/NaOH to yield as a final product:
1. CH3CH2CH2CH2OH
2. CH3CH2CH2CHO
3. CH3CH2COCH3
4. no reaction
5. none of the above
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3.
(Points: 1)
H2C=C=CH2 reacts with NaNH2 at 150oC to yield
1. propane
2. propene
3. cyclopropane
4. no reaction
5. none of the above
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4.
(Points: 1)
The Na salt of propyne reacts with 1-bromopropane to yield:
1. propyne
2. 1-hexyne
3. 2-hexyne
4. 3-hexyne
5. None of the above
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5.
(Points: 1)
the hybridization of the carbon in HCCH is
1. s
2. sp
3. sp2
4. sp3
5. none of the above
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6.
(Points: 1)
1,1-dibromopentane reacts with fused KOH to yield:
1. 1-pentene
2. 1-pentyne
3. 2-pentene
4. 2-pentyne
5. None of the above
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7.
(Points: 1)
The Na salt of acetylene reacts with 1-bromobutane to yield
1. 1-hexyne
2. 2-hexyne
3. 3-hexyne
4. acetylene
5. None of the above
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8.
(Points: 1)
HCCCH2CH3 reacts with excess HBr to yield
1. 1,1-dibromobutane
2. 1,3-dibromobutane
3. 2,4-dibromobutane
4. no reaction
5. none of the above
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9.
(Points: 1)
1-butyne reacts with Cu+ to yield:
1. CuCCCH2CH3
2. CuCCCH3
3. 1-butene
4. does not react
5. None of the above
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10.
(Points: 1)
1-butanol reacts with 1)TsCl 2)LiAlH4 to yield
1. CH3CH2CH2CO2H
2. CH3CH2CH2CH2OH
3. CH3CH2CH2CH3
4. CH3CH2CH=CH2
5. none of the above
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11.
(Points: 1)
1-butanol reacts with 1)TsCl 2)NaOH to yield
1. CH3CH2CH2OH
2. CH3CH2CH2CH2OH
3. CH3CH2CH2CH2OCH2CH2CH2CH3
4. CH3CH2CH2CH2OTs
5. none of the above
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12.
(Points: 1)
CH3OH can be converted to CH3OC(CH3)3 by:
1. 1) NaH 2) t-butanol
2. 1) NaH 2) t-butylbromide
3. 1) NaH 2) isobutylbromide
4. CH3CO2H/H2SO4
5. none of the above
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13.
(Points: 1)
1-butanol can be converted to 1-bromobutane by:
1. 1) TsOH 2)NaBr
2. NaBr
3. 1) TsCl 2)Br2
4. 1) TsCl 2) CH3Br
5. none of the above
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14.
(Points: 1)
CH3CH2CH2CHO react with LiAlH4 to yield
1. CH2=CHCH2CO2H
2. CH2=CHCH2OH
3. CH3CH2CH2CH2OH
4. no reaction
5. none of the above
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15.
(Points: 1)
PhMgBr reacts with CH3CHO to yield (after aqueous work-up):
1. PhOH
2. 2-phenyl-1-ethanol
3. phenylethene
4. no reaction
5. none of the above
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16.
(Points: 1)
PhMgBr reacts with CH3CH3 to yield (after aqueous work-up):
1. PhOH
2. 2-phenyl-1-ethanol
3. phenylethene
4. no reaction
5. none of the above
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17.
(Points: 1)
Excess CH3MgBr reacts with PhCH2OCH3 to yield (after aqueous work-up):
1. phenol
2. PhCOCH3
3. 2-phenyl-2-propanol
4. no reaction
5. none of the above
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18.
(Points: 1)
PhCH2CHO reacts with LiAlH4 to yield
1. ethylbenzene
2. PhCH2CO2H
3. 2-phenylethan-1-ol
4. no reaction
5. none of the above
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19.
(Points: 1)
PhMgBr reacts with CH3COCH3to yield (after aqueous work-up):
1. PhOH
2. 2-phenylpropane
3. 1-phenyl-2-propanol
4. no reaction
5. none of the above
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20.
(Points: 1)
CH2=CHCH2CHO react with NaBH4 to yield
1. CH2=CHCH2CO2H
2. CH3CH2CH2CH2OH
3. CH2=CHCH2CH2OH
4. no reaction
5. none of the above
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21.
(Points: 1)
cyclopentene glycol:
1. is an alkene
2. contains at least one OH gourp
3. is a ketone
4. is a phenol
5. none of the above
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22.
(Points: 1)
CH3MgBr reacts with CH3CO2H to yield:
1. CH3CO2CH3
2. CH4
3. CH3CH3
4. no reaction
5. none of the above
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23.
(Points: 1)
Which is most acidic?
1. methanol
2. phenol
3. t-butanol
4. isopropanol
5. chloromethanol
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24.
(Points: 1)
CH2=CHCH2CO2CH3 reacts with 1) LiAlH4 2) Na2Cr2O7/H2SO4 to yield
1. CH2=CHCH2CO2H
2. CH3CH2CH2CH2OH
3. CH2=CHCH2CH2OH
4. no reaction
5. none of the above
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25.
(Points: 1)
PhCHO reacts with LiAlH4 to yield
1. phenol
2. PhCO2H
3. PhCH3
4. no reaction
5. none of the above
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You need to at least give us some sort of attempt. Or pick a question and explain what you do know and what is confusing you. You can't just lay out your homework like that...
Anyway, for 1...
What does the presence of HOOH indicate? What type of mechanism will this make the reaction proceed by?
3) What is NaNH2? It's a strong base, so what do you think will happen?
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I honestly don't know..I was given these study questions to do for the exam in 3 days. I've been sick for a long time so I am sort of behind. If you can please provide the answers so I can go back to bed and study them. I need to salvage whatever I can get at this point. Luckily my gpa is really good. Please understand my situation; I am desperate. :'(
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All I'm hearing is, "Hi I'm a lazy, grade-grubbing premed."
Perhaps I'm just bitter because you're about 8 times more likely to get accepted to med school than I.
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tranceaddix: you're really going to have to accept what macman104 said. We all have a firm belief in hard work and effort, that's why we've come as far as we have. And we don't want this forum to degenerate into a "gimmie gimmie" forum, we're all at least slightly thinking what optimusprime said.
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I honestly don't know..I was given these study questions to do for the exam in 3 days. I've been sick for a long time so I am sort of behind. If you can please provide the answers so I can go back to bed and study them. I need to salvage whatever I can get at this point. Luckily my gpa is really good. Please understand my situation; I am desperate. :'(
I gave you some information about the reactants. Try and look for radical mechanisms, peroxide, SN2 mechanisms, etc. Some of these things are last Organic I material, so not all of it should be new. If you are truly truly clueless, and you have been sick, then you may want to talk to your TAs or your instructor. We're here to help guide you and help when you are stuck, not teach you the whole material.
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Just ran across your post. If you are desperate you will still be catching up. Heres some hints for where to look in your text to study the mechanisms... You will need to be better prepared for the next exam; I suggest taking a Vitamin C. Search your text index of key reaction conditions in the questions for guidance to the chapter you need to study.
14.---hydrogenation
(Points: 1)
CH3CH2CH2CHO react with LiAlH4 to yield
1. CH2=CHCH2CO2H
2. CH2=CHCH2OH
3. CH3CH2CH2CH2OH
4. no reaction
5. none of the above
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15.---Gringard
(Points: 1)
PhMgBr reacts with CH3CHO to yield (after aqueous work-up):
1. PhOH
2. 2-phenyl-1-ethanol
3. phenylethene
4. no reaction
5. none of the above
Save Answer
16.---Gringard
(Points: 1)
PhMgBr reacts with CH3CH3 to yield (after aqueous work-up):
1. PhOH
2. 2-phenyl-1-ethanol
3. phenylethene
4. no reaction
5. none of the above
Save Answer
17.---Gringard
(Points: 1)
Excess CH3MgBr reacts with PhCH2OCH3 to yield (after aqueous work-up):
1. phenol
2. PhCOCH3
3. 2-phenyl-2-propanol
4. no reaction
5. none of the above
Save Answer
18.---hydrogenation
(Points: 1)
PhCH2CHO reacts with LiAlH4 to yield
1. ethylbenzene
2. PhCH2CO2H
3. 2-phenylethan-1-ol
4. no reaction
5. none of the above
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19.----Gringard
(Points: 1)
PhMgBr reacts with CH3COCH3to yield (after aqueous work-up):
1. PhOH
2. 2-phenylpropane
3. 1-phenyl-2-propanol
4. no reaction
5. none of the above
Save Answer
20.---Hydrogenation
(Points: 1)
CH2=CHCH2CHO react with NaBH4 to yield
1. CH2=CHCH2CO2H
2. CH3CH2CH2CH2OH
3. CH2=CHCH2CH2OH
4. no reaction
5. none of the above
Save Answer
21.
(Points: 1)
cyclopentene glycol:
1. is an alkene
2. contains at least one OH gourp
3. is a ketone
4. is a phenol
5. none of the above
Save Answer
22.---Gringard
(Points: 1)
CH3MgBr reacts with CH3CO2H to yield:
1. CH3CO2CH3
2. CH4
3. CH3CH3
4. no reaction
5. none of the above
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23.
(Points: 1)
Which is most acidic?
1. methanol
2. phenol
3. t-butanol
4. isopropanol
5. chloromethanol
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24.
(Points: 1)
CH2=CHCH2CO2CH3 reacts with 1) LiAlH4 2) Na2Cr2O7/H2SO4 to yield
1. CH2=CHCH2CO2H
2. CH3CH2CH2CH2OH
3. CH2=CHCH2CH2OH
4. no reaction
5. none of the above
Save Answer
25.
(Points: 1)
PhCHO reacts with LiAlH4 to yield
1. phenol
2. PhCO2H
3. PhCH3
4. no reaction
5. none of the above