Organic Chemistry
12th Edition
ISBN: 9781118875766
Author: T. W. Graham Solomons, Craig B. Fryhle, Scott A. Snyder
Publisher: WILEY
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Textbook Question
Chapter 4, Problem 47P
Consider the cis and trans isomers of 1,3-di-tert-butylcyclohexane (build molecular models). What unusual feature accounts for the face that one of these isomers apparently exists in a twist boat conformation rather than a chair conformation?
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Chapter 4 Solutions
Organic Chemistry
Ch. 4 - Prob. 1PPCh. 4 - Which structure does not represent...Ch. 4 - Prob. 3PPCh. 4 - Draw bond-line formulas for all of the isomers of...Ch. 4 - Prob. 5PPCh. 4 - Draw bond-line formulas and give IUPAC...Ch. 4 - Draw bond-line formulas and give IUPAC...Ch. 4 - Practice Problem 4.8 Give names for the following...Ch. 4 - Prob. 9PPCh. 4 - Prob. 10PP
Ch. 4 - Prob. 11PPCh. 4 - Give the structures and IUPAC names for all the...Ch. 4 - Prob. 13PPCh. 4 - Practice Problem 4.14 Show by a calculation (using...Ch. 4 - Practice Problem 4.15 Write structures for the cis...Ch. 4 - Practice Problem 4.16
(a) Write structural...Ch. 4 - Practice Problem 4.17 Write a conformational...Ch. 4 - Practice Problem 4.18
(a) Write the two...Ch. 4 - Prob. 19PPCh. 4 - Practice Problem 4.20 (a) What is the index of...Ch. 4 - Practice Problem 4.21
Zingiberene, a fragrant...Ch. 4 - Practice Problem 4.22 Carbonyl groups also count...Ch. 4 - Prob. 23PCh. 4 - Give systematic IUPAC names for each of the...Ch. 4 - Prob. 25PCh. 4 - Write the structure and give the IUPAC systema.tic...Ch. 4 - 4.27. Write the structure(s) of the simplest...Ch. 4 - Prob. 28PCh. 4 - 4.29. Write structures for the following...Ch. 4 - Prob. 30PCh. 4 - A spiro ring junction is one where two rings that...Ch. 4 - 4.32. Tell what is meant by a homologous series...Ch. 4 - Four different cycloalkenes will all yield...Ch. 4 - 4.34. (a) Three different alkenes yield...Ch. 4 - Prob. 35PCh. 4 - Prob. 36PCh. 4 - 4.37. Write the structures of two chair...Ch. 4 - Prob. 38PCh. 4 - Without referring to tables, decide which member...Ch. 4 - Prob. 40PCh. 4 - 4.41. Which compound would you expect to be the...Ch. 4 - Prob. 42PCh. 4 - 4.43. Write the two chair conformations of each of...Ch. 4 - Provide an explanation for the surprising fact...Ch. 4 - Prob. 45PCh. 4 - 4.46. Specify the missing compounds and/or...Ch. 4 - Consider the cis and trans isomers of...Ch. 4 - Prob. 48PCh. 4 - Open the energy-minimized 3D Molecular Models on...Ch. 4 - 4.50. Open the 3D Molecular Models on the book’s...Ch. 4 - 4.51. Open the 3D Molecular Model on the book’s...Ch. 4 - 1. The predominant conformation for D-glucose is...Ch. 4 - Prob. 2LGPCh. 4 - When 1,2-dimethylcyclohexene is allowed to react...Ch. 4 - Prob. 4LGP
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- Following is a planar hexagon representation for one isomer of 1,2,4-trimethylcyclohexane. Draw the alternative chair conformations of this compound and state which of the two is more stable.arrow_forwardFollowing are structural formulas for 1,4-dioxane and piperidine. 1,4-Dioxane is a widely used solvent for organic compounds. Piperidine is found in small amounts in black pepper (Piper nigrum). (a) Complete the Lewis structure of each compound by showing all unshared electron pairs. (b) Predict bond angles about each carbon, oxygen, and nitrogen atom. (c) Describe the most stable conformation of each ring and compare these conformations with the chair conformation of cyclohexane.arrow_forwardTwo VSEPR diagrams for Molecule 1 are given below. They are conformational isomers or molecules that place atoms differently in space because of the rotation of a single bond. H H H:O H:O Conformer 1 H H H Ö: Conformer 2 3. (a) Can you “see” either of the two conformational isomers (Conformer 1 or Conformer 2) in the line drawing that you drew for Molecule 1? Explain your answer.arrow_forward
- Is there a difference in the stability of the two cyclohexane conformations?arrow_forwardConsider 1,2-dimethylcyclohexane.Q: Draw the two possible chair conformations for the cis isomer. Which conformation, if either, is more stable?arrow_forwardRefer the structure below: CH3 CH3 CH3 CH3 Compound I Compound II (i) Are the above cyclohexane derivatives cis- or trans-isomer? (ii) Redraw the structure in chair conformation and identity which of these the most and the least stable.arrow_forward
- Consider 1,2-dimethylcyclohexane.Q: Draw the two possible chair conformations for the trans isomer. Whichconformation, if either, is more stable?arrow_forward4.) For each of the following pairs, give the relationship between the two compounds. You many ignore conformational isomerism here, and any conformers may be considered to be identical compounds. H H. a. H H H. H F F CH, b. он CH3 он c. CH, он он CH3 d. CHs CH3 CH, CH3 CH, .CH2 Br H. H. Br CH3 CH3 Br Br f. CH, H. CH3 он H. H Br Br H. OH 2arrow_forwardThere are four cis,trans isomers of 2-isopropyl-5-methylcyclohexanol:(a) Using a planar hexagon representation for the cyclohexane ring, draw structural formulas for the four cis,trans isomers.(b) Draw the more stable chair conformation for each of your answers in part (a).(c) Of the four cis,trans isomers, which is most stable? (Hint: If you answered thispart correctly, you picked the isomer found in nature and given the name menthol.)arrow_forward
- Menthol, a terpene, exists in a (1R,2S,5R) and(1S,2R,5S) form. Draw the two molecules in theirmost stable chair conformers (IUPAC name: 2-isopropyl-5-methylcyclohexanol).arrow_forwardQuestion 13 The most stable conformation of line structure X is но ÕH ****** Bu Et H Bu H. Bu Me H 'Bu! Bu HO H OH 'Bu H Et FOH HO OH Ét Me H HO H ÓH I HPOH Ét H OH ÓH Et Me VI II IV V O IV O V None of the given optionsarrow_forward4. possible equatorial axial relationships for the cis and trans for the compound CH2CH3 CH Which is the conformer? Explain (in not more than two lines in your own words)arrow_forward
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