Introduction to General, Organic and Biochemistry
11th Edition
ISBN: 9781285869759
Author: Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher: Cengage Learning
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Textbook Question
Chapter 12, Problem 12.34P
If you examine the structural formulas for the following cycloalkenes, you will see that the configuration of the double bond is cis in each.
Cyclopentene Cyclohexene Cycloheptene
All attempts to synthesize these cycloalkenes in which the double bond has a trans configuration have failed. Apparently, it is impossible to have a
trans configuration in these cycloalkenes. Offer an explanation for why this is so.
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Chapter 12 Solutions
Introduction to General, Organic and Biochemistry
Ch. 12.3 - Prob. 12.1PCh. 12.3 - Prob. 12.2PCh. 12.3 - Problem 12-3 Write the IUPAC name for each...Ch. 12.3 - Problem 12-4 Draw structural formulas for the...Ch. 12.3 - Problem 12-5 How many stereoisomers are possible...Ch. 12.5 - Prob. 12.6PCh. 12.5 - Problem 12-7 Propose a two-step mechanism for the...Ch. 12.5 - Prob. 12.8PCh. 12.5 - Problem 12-9 Propose a three-step reaction...Ch. 12.5 - Prob. 12.10P
Ch. 12 - Prob. 12.11PCh. 12 - Answer true or false. Both ethylene and acetylene...Ch. 12 - 12-13 What is the difference in structure between...Ch. 12 - There are three compounds with the molecular...Ch. 12 - 12-15 Name and draw structural formulas for all...Ch. 12 - Prob. 12.16PCh. 12 - Draw a structural formula for at least one...Ch. 12 - Each carbon atom in ethane and in ethylene is...Ch. 12 - Prob. 12.19PCh. 12 - Prob. 12.20PCh. 12 - Prob. 12.21PCh. 12 - 12*22 Draw a structural formula for each compound....Ch. 12 - 12-23 Draw a structural formula for each compound....Ch. 12 - Prob. 12.24PCh. 12 - 12-25 Write the IUPAC name for each unsaturated...Ch. 12 - Explain why each name is incorrect and then write...Ch. 12 - 12-27 Explain why each name is incorrect and then...Ch. 12 - Prob. 12.28PCh. 12 - 12-29 Which of these alkenes show cis-trans...Ch. 12 - 12-30 Which of these alkenes shows cis-trans...Ch. 12 - 12-31 Cyclodecene exists as both cis and trans...Ch. 12 - Arachidonic acid is a naturally occurring C„o...Ch. 12 - Prob. 12.33PCh. 12 - If you examine the structural formulas for the...Ch. 12 - 12*35 For each molecule that shows eis-trans...Ch. 12 - Name and draw structural formulas for all...Ch. 12 - /3-Ocimene, a triene found in the fragrance of...Ch. 12 - Answer true or false. Alkenes and alkynes are...Ch. 12 - Prob. 12.39PCh. 12 - 12-40 Define alkene addition reaction. Write an...Ch. 12 - Prob. 12.41PCh. 12 - 12-42 Complete these equations.Ch. 12 - Draw structural formulas for all possible...Ch. 12 - Prob. 12.44PCh. 12 - 12-45 Draw a structural formula for the product of...Ch. 12 - Draw a structural formula for an alkene with the...Ch. 12 - 12-47 Draw a structural formula for an alkene with...Ch. 12 - Draw a structural formula for an alkene with the...Ch. 12 - Prob. 12.49PCh. 12 - 12-50 Draw the structural formula of an alkene...Ch. 12 - Prob. 12.51PCh. 12 - Prob. 12.52PCh. 12 - Following is the structural formula of...Ch. 12 - Propose an explanation for the following...Ch. 12 - There are nine alkenes with the molecular formula...Ch. 12 - Prob. 12.56PCh. 12 - 12-57 Hydrocarbon A, Cf,Hs, reacts with 2 moles of...Ch. 12 - 12-58 Show how to convert ethylene to these...Ch. 12 - 12-59 Show how to convert 1-butene to these...Ch. 12 - Prob. 12.60PCh. 12 - 12-61 (Chemical Connections 12A) What is one...Ch. 12 - Prob. 12.62PCh. 12 - Prob. 12.63PCh. 12 - 12-64 (Chemical Connections 120 What is the...Ch. 12 - (Chemical Connections 120 Assume that 1 X IO-12 g...Ch. 12 - Prob. 12.66PCh. 12 - 12-67 (Chemical Connections 12D ) In which isomer...Ch. 12 - Prob. 12.68PCh. 12 - Prob. 12.69PCh. 12 - Prob. 12.70PCh. 12 - Prob. 12.71PCh. 12 - Prob. 12.72PCh. 12 - Prob. 12.73PCh. 12 - Propose a structural formula for the product!s)...Ch. 12 - Prob. 12.75PCh. 12 - Draw the structural formula of an alkene that...Ch. 12 - 12-77 Show how to convert cyclopentene into these...Ch. 12 - Prob. 12.78PCh. 12 - Prob. 12.79PCh. 12 - In omega-3 fatty adds, the last carbon of the last...Ch. 12 - Prob. 12.81P
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- Following 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_forwardHow many unique stereoisomers exist for 1,2,3,4,5-pentachlorocyclohexane?arrow_forwardMake a model of cyclooctane. At least 8 different somewhat stable conformations of this molecule can exist. Draw some of the conformations you can find. Can you find a conformation of this ring that is strain-free? Identify the type of strain present in all possible conformations of this molecule.arrow_forward
- Perform a conformational analysis of 1-bromo-2-chloroethane, BrCH2CH2Cl. Pay attention to the relative energies of the various conformations, but do not concern yourself with the actual energy values.arrow_forwardStereoisomers share the same connectivity and differ only in the way their atoms are arranged in space. Draw the structure of a compound that is a stereoisomer of cis-1,4-dibromocyclohexane.(Note that the question asks for a different stereoisomer of the named compound and not the named compound itself.)Use the wedge/hash bond tools to indicate stereochemistry where it exists.In cases where there is more than one answer, just draw one.arrow_forwardWhy are these two conformational isomers? I was under the impression that in molecules with only sigma bonds, the bonds can rotate freely, and so the placement of the chlorines wouldn't matter?arrow_forward
- 1,2-ditert-butylcyclohexane is an interesting case of a conformational study. The cis isomer is more stable than the trans isomer, although the trans isomer presents a conformer with both substituents in equatorial positions. In order to analyze this fact:a. Draw the conformational equilibrium of both compounds. Explain using and drawing the structures why this difference happens (the one described above). b. In the trans isomer, the di-axial conformation is 25.9 kJ / mol more stable than the di-equatorial. Calculate the energy of the di-equatorial conformation.arrow_forwardHow would you best describe the C-C bonds lengths in benzene relative to cyclohexane? Hypothesize why these results are observed.arrow_forwarddraw and name two structures that match the description of a trans-dihalocyclopentanearrow_forward
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