Question 4 What type of isomers are CH3CH20CH3 and CH3CH2CH20H? a. constitutional b. symmetrical c. configurational d. conformational e. stereochemical Question 5 What is the correct name for the structure below? a. 2-ethyl-3-methyl-1-hexene b. 2-propyl-3-methyl-1-pentene c. 3-methylene-4-methylheptane d. (1-methyl)-2-butyl-1-butene

Question 4 What type of isomers are CH3CH20CH3 and CH3CH2CH20H? a. constitutional b. symmetrical c. configurational d. conformational e. stereochemical Question 5 What is the correct name for the structure below? a. 2-ethyl-3-methyl-1-hexene b. 2-propyl-3-methyl-1-pentene c. 3-methylene-4-methylheptane d. (1-methyl)-2-butyl-1-butene

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter7: Cycloalkanes

Section: Chapter Questions

Problem 5E

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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?
What is the difference between a constitutional, confirgurational, and a conformational isomer?
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.
See attachment 2nd chair figure. Is it cis-1-ethyl-3-methylcyclohexane?
Compounds E and F are two isomers of 2,3-dibromopentane drawn in staggered conformations. Which compounds (A–D) in Figure 5.8 are identical to E and F?
Give your view on boat conformation of cyclohexane ?
Illustate the eclipsed conformation ?
Construct a model of chloroethane, CH3CH2Cl. Remember that these models do not actually show the relative sizes of different atoms. View the model along the carbon-carbon axis and draw the sawhorse and Newman projections of the preferred conformation.
Construct the chair structures with the molecular models for trans-1-ethyl-3-methylcyclohexane. Find the energy of each conformer, the equilibrium constant Keq, and the percentage of each conformer at 25oC. Indicate which conformer is more stable.
Define Conformations of Butane ?
Use your answers from Problem 2.48 to complete the table showing correlations between cis,trans and axial,equatorial for disubstituted derivatives of cyclohexane. Draw the alternative chair conformations for the cis and trans isomers of 1,2-dimethylcyclohexane, 1,3-dimethylcyclohexane, 1,4-dimethylcyclohexane. (a) Indicate by a label whether each methyl group is axial or equatorial.
Draw the most stable conformation of 1,4-dichlorobutane, using wedges and dashes to represent bonds coming out of the paper and going behind the paper, respectively.