4.36 Determine whether the structures in eachset represent the same molecule, cis-transisomers, or constitutional isomers. If they arethe same molecule, determine whether they arein the same or different conformations as aresult of rotation about a carbon-carbon singlebond. (See Examples 4.6, 4.7)anda.andb.OHandH.H OHandd.C.

Answered: Image /qna-images/answer/bee2182a-f687-4196-9e3e-3848c7587c1d.jpg

Answered: 4.36 Determine whether the structures…

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter22: Organic Chemistry And Biochemistry

Section: Chapter Questions

Problem 74QE

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In the next chapter we'll look at cycloalkanesâ€”saturated cyclic hydrocarbonsâ€”and weâ€™ll see that the molecules generally adopt puckered, nonplanar conformations. Cyclohexane, for instance, has a puckered shape like a lounge chair rather than a flat shape. Why?
a. Draw the lowest energy conformation for the compound shown in the image. b. Draw the complete structural formula of the following compound: cis-1-bromo-3-chlorocyclohexane.
Perspective drawings of Chair and Boat Conformers fo Cyclohexane (C6H12). Note it is impossible to place all the carbons in the same plane without straining the bonds. Take two opposite carbons and pull both of them up to make one conformation adn then pull one of them down to make the other conformation. Can you inercovert one conformer int othe other without breaking any bonds? Explain why these represent conformers and not isomers.
Condensed structures may be ambiguous about constitutional isomers. Consider these formulas, identify possible constitutional isomers, and draw them. a. (C₂H;)CH=C(CH3)CH₂CH₂ (C₂H₂) = b.CH,C(C1)=CHBr c. CH₂CH=CHCH₂CH=CHCH₂
Jj.15.
6
Classify the pairs of molecules as not the same molecule, structural isomers, diastereomers, enantiomers or identical. Circle any molecules that are not achiral (a) (b) (c) Br... H CI H H Br H H3C Br H. CI Br H Br CI I I Br" "H H Br H CH3 Cr Br
4
3. Draw the chair conformer of cyclohexane. Label the axial hydrogens (Ha) and the equatorial hydrogens (He).
Create a conformational analysis using the molecule in the picture. Follow the instruction in the picture when you transform the molecule into its Newman projection. Explain your conformational analysis Which conformer is the most stable? Explain. • Which conformer is the most unstable? Explain. Note: Use the term angle strain, torsional strain other technical terms when explaining. Attachments H 4 111 CI Rotate C, when doing Conformational analysis CI Conformational analysis.png H CH3
5) Draw a different constitutional isomer of heptane (C₂H₁6) that contains a quaternary (4°) carbon. Then draw at least 3 other constitutional isomers.
2) The condensed structure of 2,4-dimethylheptane is Hас— сн—сн-сн—сH2-сH2-СH; ČH3 CHз СНЗСНЗСН2СНЗСН2СH2СHЗ CH-CH-CH2-CH3 I I. CH, CHз Нас- Hас— сн—сн2—сн-сн,—сн—СH—CHз CHз ČH3 CH3 HG -CH2- H3C- -CH--CH2-CHз CHз H3C

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