Organic Chemistry : Help with Alkane Reactions
Study concepts, example questions & explanations for Organic Chemistry
All Organic Chemistry Resources
Example Questions
Example Question #1 : Hydrocarbons
Which of the following can reduce an alkene to an alkane?
Lithium aluminum hydride (LiAlH4) and H2/Pd
H2/Pd and H2/Raney nickel
H2/Pd
Lithium aluminum hydride (LiAlH4)
H2/Raney nickel
H2/Pd and H2/Raney nickel
Neither lithium aluminum hydride, nor sodium borohydride will reduce C–C double bonds.
H2/Raney nickel and H2/Pd can each (individually) reduce an alkene to an alkane. Since both H2/Raney nickel and H2/Pd can reduce the alkene, the answer is both of those reagents. This is a catalytic hydrogenation reaction, and H2/Raney nickel not only reduces C–C double bonds, but also carbonyl compounds.
Example Question #531 : Organic Chemistry
Identify the major organic product expected from the acid-catalyzed dehydration of 2-methyl-2-pentanol.
2-methyl-1-pentene
None of the other answers
2-methyl-2-pentene
cis-3-methyl-2-pentene
3-methyl-1-pentene
2-methyl-2-pentene
The initial compound is a five-carbon alkane chain with methyl and hydroxy groups on the second carbon. Dehydration involves the hydrogenation of the hydroxy group. That group then leaves, and a double bond is formed. Zaitsev's rule states that double bonds are more stable on more highly substituted carbons. The double bond forms across carbons two and three.
Example Question #1 : Hydrocarbon Reactants
If an alkane is reacted with excess 
Whenever an alkane is reacted with excess oxygen in a high temperature reaction, the reaction is known as combustion. Combustion of an alkane always produces carbon dioxide gas and water vapor.
Therefore the correct answer is: 
Certified Tutor
All Organic Chemistry Resources
