Post on 31-Dec-2015
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Jeopardy
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VocabularyDehydrationSynthesis/
Combustion
Electrophilic addition - HX
Hydrogenation/Radical reactions
Electrophilic addition - HOH
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Final Jeopardy
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What is the positively charged carbon called?
Carbocation
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What is a species with a lone, unpaired electron called?
A free-radical
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What is a positively charged substance desired negative charge called?
An electrophile
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What is the type of addition that occurs when addition to an alkene occurs on the same side of the plane of atoms?
Syn Addition
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What is the name of the rule that states that the nucleophilic part of the reagent will bind with the most stable carbon of the substrate?
Markovnikov’s rule
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What is produced through the dehydration synthesis reaction between two primary alcohols?
An ether
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What is the best acid to use to catalyze a dehydration synthesis reaction (in part due to its strong dehydrating ability)?
H2SO4 (sulfuric acid)
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What ester is made when reacting butyric acid (butanoic acid) with methanol?
Methyl butanoate
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What is the hydrocarbon being burned if exactly 5 moles of molecular oxygen is needed for complete combustion of this alkane?
Propane (C3H8)
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What are the products of COMPLETE combustion?
Carbon Dioxide & Water
Carbon monoxide & carbon are produced when there are insufficient amounts of oxygen.
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What type of alkene is ethene; symmetrical or unsymmetrical?
symmetrical
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What is the major product for the electrophilic addition reaction between propene and H-Br?
2-bromopropane
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What is the first & slowest step of any electrophilic addition reaction?
What is the electrophile of this reaction?
The formation of the carbocation The hydrogen (from either the H-X or from H-OH)
3 - $400 What are the major & minor products of the following
reaction?
+ H Br
Br
Br
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What is the major product of the following:
+ H Cl
H2O2
Cl Cl
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Hydrogenation reactions are catalyzed by metals that adsorb hydrogen to their surface. What is an example of a metal that would be suitable to catalyze this type of reaction?
Pt, Rh, or Ni
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What is the product for the hydrogenation reaction involving 1-butene & H2(g) using Pt to catalyze this reaction?
butane
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What are the three steps of all radical reactions? Describe each.
Step 1 – initiation – creation of radicals Step 2 – propagation – use of a radical to create
product, but resulting in formation of another radical
Step 3 – termination – two radicals combine to make product, removing radicals from reaction vessel
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What type of bond breakage results on the formation of radicals?
Homolytic fission or homolytic cleavage
4 - $500 What are the products of the following halogenation
reaction?
+Br
H H
Pt
Br
H
H
Br
H
H
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What is produced when any alkene undergoes the acid-catalyzed addition reaction with water?
An alcohol
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What is the major product for the acid catalyzed hydration of 2-methylbut-2-ene?
2-methylbutan-2-ol
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What is the major product of the following reaction?
+ H O
H
H+
O H
O
H
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What reagent is used if an anti-Markovnikov product is desired?
H2O2
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Identify the products of the following reaction:
+H
OH
BH3,
H2O2
-OH
O H
Final Jeopardy
Show the mechanism used to explain the formation of 2-methyl-2-bromopentane from the electrophilic addition reaction between 2-methylpent-2-ene and HBr. Make certain to include the rate determining step and use arrows correctly.
See notes or see answer in class.