Concept explainers
(a)
Interpretation:
More stable alkene should be identified from the given
Concept introduction:
The amount of heat released in a hydrogenation reaction is known as heat of hydrogenation
The most stable alkene has the smallest heat of hydrogenation.
The stability of an alkene increases as the number of alkyl substituents bonded to its
The stability of an alkene increases as the number of hydrogen bonded to its
(b)
Interpretation:
Compound with largest heat of hydrogenation has to be identified from the given alkenes.
Concept introduction:
The amount of heat released in a hydrogenation reaction is known as heat of hydrogenation
The most stable alkene has the smallest heat of hydrogenation.
The stability of an alkene increases as the number of alkyl substituents bonded to its
The stability of an alkene increases as the number of hydrogen bonded to its
(c)
Interpretation:
Compound with smallest heat of hydrogenation has to be identified from the given alkenes.
Concept introduction:
The amount of heat released in a hydrogenation reaction is known as heat of hydrogenation
The most stable alkene has the smallest heat of hydrogenation.
The stability of an alkene increases as the number of alkyl substituents bonded to its
The stability of an alkene increases as the number of hydrogen bonded to its
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ORGANIC CHEMISTRY (LL)-W/MOD.MASTERING.
- Consider the tricyclic structure B. (a) Label each substituent on the rings as axial or equatorial. (b) Draw B using chair conformations for each sixmembered ring. (c) Label the atoms on the ring fusions (the carbons that join each set of two rings together) as cis or trans to each other.arrow_forwardif the heat of hydrogenation for cyclohexene is 120 kj mol and 1,3 cyclohexane is less than 240 kj mol, what is the heat of hydrogenation for benzene? thank you ^___^arrow_forward(a) Draw all stereoisomers formed by monochlorination of the cis and trans isomers of 1,2-dimethylcyclobutane drawn below. (b) How many constitutional isomers are formed in each reaction? (c) Label any pairs of enantiomers formed.arrow_forward
- Is the reaction of 2-butene with HBr regioselective? a. Is it stereoselective? b. Is it stereospecific?arrow_forwardConsider the attached tricyclic structure B. (a) Label each substituent on the rings as axial or equatorial. (b) Draw B using chair conformations for each sixmembered ring. (c) Label the atoms on the ring fusions (the carbons that join each set of two rings together) as cis or trans to each other.arrow_forwardRank the alkenes from most stable to least stable.arrow_forward
- a.) Draw B as a hexagon with wedges and dashed wedges to show the stereochemistry of substituents.b.) Draw a stereoisomer of A as a hexagon using wedges and dashed wedges to show the orientation of substituents.arrow_forwardDraw a structure for each compound (includes old and new names).(a) 3-methylpent-1-ene (b) cis-3-methyl-3-hexene (c) 3,4-dibromobut-1-ene(d) 1,3-cyclohexadiene (e) cycloocta-1,4-diene (f) (Z)-3-methyl-2-octene(g) vinylcyclopropanearrow_forwardtrans-Decalin is more stable than its cis isomer, but cis-bicyclo[4.1.0]-heptane is more stable than its trans isomer. Explain.arrow_forward
- Draw a structure for each compound (includes old and new names).( cycloocta-1,4-dienearrow_forwardIndicate whether each statement is true or false. (a) Butanecontains carbons that are sp2 hybridized. (b) Cyclohexaneis another name for benzene. (c) The isopropyl group containsthree sp3-hybridized carbons. (d) Olefin is anothername for alkyne.arrow_forwardHow do you rank alkenes in order of their heats of hydrogenation? How do you know an alkene's heat of hydrogenation?arrow_forward
- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning