AH° values obtained for a series of similar reactions are one set of experimental data used to determine the relative stability of alkenes. Explain how the following data suggest that cis-2-butene is more stable than 1-butene (Section 12.3A). CH2=CHCH,CH, + H2 CH;CH2CH2CH3 AH° =-127 kJ/mol 1-butene CH3 CH3 C=C + H2 CH3CH,CH,CHg AH° =-120 kJ/mol cis-2-butene

AH° values obtained for a series of similar reactions are one set of experimental data used to determine the relative stability of alkenes. Explain how the following data suggest that cis-2-butene is more stable than 1-butene (Section 12.3A). CH2=CHCH,CH, + H2 CH;CH2CH2CH3 AH° =-127 kJ/mol 1-butene CH3 CH3 C=C + H2 CH3CH,CH,CHg AH° =-120 kJ/mol cis-2-butene

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter23: Carbon: Not Just Another Element

Section23.2: Hydrocarbons

Problem 23.3CYU: There are 17 possible alkene isomers with the formula C6H12. Draw structures of the five isomers in...

See similar textbooks

Similar questions

If a catalyst could be found that would establish an equilibrium between 1,2-butadiene and 2-butyne, what would be the ratio of the more stable isomer to the less stable isomer at 25°C? CH,=C=CHCH, CH,C=CCH, AG° = -16.7 kJ (-4.0 kcal)/mol
∆H° values obtained for a series of similar reactions are one set of experimental data used to determine the relative stability of alkenes. Explain how the following data suggest that cis-but-2-ene is more stable than but-1-ene (Section 12.3A).
11. s) Draw the most stable conformation of 1,3-dichloro-2,4-difluorocyclohexane: 12. Which of the following represents the most stable conformation of 1,2,4,5- tetramethyleyclohexane? (one correct answer) CH b) CH HC H- H- CH HC CH, CH 6. Give IUPAC name for the following molecule. Include "cis" and "trans" designations if applicable. H2C-CH3 H -CH2 H- H Br
ΔH° values obtained for a series of similar reactions are one set ofexperimental data used to determine the relative stability of alkenes. Explain how the cis-but-2-ene is more stable than but-1-ene
The heat of combustion of cis-1,2-dimethylcyclopropane is larger than that of the trans isomer. Which isomer is more stable? Use drawings to explain this difference instability.
When cyclohexane is substituted by an ethynyl group, -C=CH, the energy difference between axial and equatorial conformations is only 1.7 kJ (0.41 kcal)/mol. Compare the conformational equilibrium for methylcyclohexane with that for ethynylcyclohexane and account for the difference between the two.
3. The heat of hydrogenation for allene, H½C = C= CH2, to yield propane is – 295 kJ/mol, and the heat of hydrogenation for a typical monosubstituted alkene such as propene is -126 kJ/mol. Is allene more stable or less stable than you might expect for a diene ? Explain.
Draw the skeletal (line-bond) structure of (1R,2S)-1-bromo-2-methylcyclohexane
Based on naming branched alkyl substituents, and draw all possible alkyl groups having the formula C5H11–. Give the IUPAC names for the eight compounds of molecular formula C10H20that contain a cyclopentane ring with each of these alkyl groups as a substituent.
Name the alkene. Be sure to indicate stereochemistry and use hyphens (-) not endashes (-). H3C-CH2 H3C CH3 The name of the alkene is:
Draw a structural formula for the alkene you would use to prepare the alcohol shown by hydroboration/oxidation. -CHCH3 ОН • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • In cases where there is more than one answer, just draw one.
Two alkenes undergo hydrogenation to yield a mixture or cis- and trans-1,4-dimethylcyclohexane. Which two are these? A third, however, gives only cis-1,4-dimethylcyclohexane. What compound is this?