Essential Organic Chemistry, Global Edition
3rd Edition
ISBN: 9781292089034
Author: Paula Yurkanis Bruice
Publisher: PEARSON
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Textbook Question
Chapter 3.12, Problem 35P
At any one time, would you expect there to be more conformers with the substituent in the equatorial position in a sample of ethylcyclohexane or in a sample of isopropylcyclohexane?
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It is easy to imagine a cyclohexane as a flat hexagon and a lot of the time we draw it
that way. Looking at 1,3,5-triethylcyclohexane we cannot tell the stability of the
molecule from looking at the flat 2D drawing. Explain why we need to look at the 3D
configuration and what conformation (axial,equatorial) would each of the three ethyl
groups be in for the most stable configuration.
Draw the formula for all the possible chair conformations of the following cyclohexanes. Indicate the stable conformer.
Hello,
I was reading an answer from the book Organic Chemistry by Brown et al. The question is 2.51 "Draw alternative chair conformations for each substituted cyclohexane and state which chair is more stable." There are then 4 cyclohexanes (labeled a-d). For the "a" cyclohexane, the substituents are arranged as a combination of axial and equatorial in both chair conformations. However, for the "b," "c," and "d," cyclohexanes one chair has only equatorial substituents, and the other chair has only axial substituents. Why is the "a" chair conformation different?
https://www.bartleby.com/solution-answer/chapter-2-problem-251p-organic-chemistry-8th-edition/9781305580350/draw-alternative-chair-conformations-for-each-substituted-cyclohexane-and-state-which-chair-is-more/4532cd91-c341-11e9-8385-02ee952b546e
Chapter 3 Solutions
Essential Organic Chemistry, Global Edition
Ch. 3.1 - Name each of the following:Ch. 3.1 - Draw the structures and name the four...Ch. 3.1 - Draw the structure for each of the following...Ch. 3.1 - Name the following compounds:Ch. 3.1 - Prob. 7PCh. 3.2 - What is each compounds systematic name?Ch. 3.2 - Prob. 11PCh. 3.3 - Prob. 12PCh. 3.3 - Convert the following condensed structures into...Ch. 3.3 - The molecular formula for ethyl alcohol (CH3CH2OH)...
Ch. 3.3 - Draw a condensed and a skeletal structure for the...Ch. 3.3 - What is each compounds systematic name?Ch. 3.4 - Prob. 17PCh. 3.4 - Give two names for each of the following alkyl...Ch. 3.5 - Are the following compounds primary, secondary, or...Ch. 3.5 - Name the following amines and tell whether they...Ch. 3.5 - Draw the structures and provide systematic names...Ch. 3.6 - Predict the approximate size of the following bond...Ch. 3.7 - What is the smallest straight-chain alkane that is...Ch. 3.7 - Prob. 24PCh. 3.7 - Prob. 25PCh. 3.7 - Prob. 26PCh. 3.7 - List the compounds in each set from highest...Ch. 3.8 - Rank the following compounds in each set from most...Ch. 3.8 - In which solvent would cyclohexane have the lowest...Ch. 3.8 - Prob. 30PCh. 3.9 - Prob. 31PCh. 3.9 - a. Draw the three staggered conformations and the...Ch. 3.9 - a. Draw the most stable conformation of pentane...Ch. 3.11 - Draw 1,2,3,4,5,6-hexachlorocyclohexane with a. all...Ch. 3.12 - At any one time, would you expect there to be more...Ch. 3.13 - Prob. 36PCh. 3 - a. How many hydrogens does an alkane with 17...Ch. 3 - Prob. 2PCh. 3 - Draw a condensed structure and a skeletal...Ch. 3 - Prob. 39PCh. 3 - Prob. 40PCh. 3 - Which of the following represents a cis isomer?Ch. 3 - a. How many primary carbons does each of the...Ch. 3 - Name the following amines and tell whether they...Ch. 3 - Which of the following conformers of isobutyl...Ch. 3 - What is each compounds name? a. CH3CH2CH2OCH2CH3Ch. 3 - Draw the structural formula for an alkane that has...Ch. 3 - Which has a. the higher boiling point:...Ch. 3 - Ansaid and Motrin belong to the group of drugs...Ch. 3 - A student was given the structural formulas of...Ch. 3 - Which of the following conformers has the highest...Ch. 3 - Prob. 51PCh. 3 - Draw skeletal structures for the following: a....Ch. 3 - Prob. 53PCh. 3 - For rotation about the C-3 8 C-4 bond of...Ch. 3 - Prob. 55PCh. 3 - What is each compounds systematic name?Ch. 3 - Draw the two chair conformers for each of the...Ch. 3 - Draw the nine constitutional isomers with...Ch. 3 - Prob. 59PCh. 3 - Prob. 60PCh. 3 - Prob. 61PCh. 3 - Using Newman projections, draw the most stable...Ch. 3 - For each of the following disubstituted...Ch. 3 - Prob. 64PCh. 3 - Prob. 65PCh. 3 - What is each compounds systematic name?Ch. 3 - Prob. 67PCh. 3 - Bromine is a larger atom than chlorine, but the...Ch. 3 - Prob. 69PCh. 3 - Prob. 70PCh. 3 - a. Draw a potential energy diagram for rotation...
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- Write a conformational structure for 1,2,3-trimethylcyclohexane in which all the methyl groups are axial and then show its more stable conformation.arrow_forwardDraw the most and least stable conformer of chloroethane and 1,2-dibromoethane.arrow_forwardIs there a difference in the stability of the two cyclohexane conformations?arrow_forward
- Draw both conformations for 1-ethyl-1-methylcyclohexane and decide which conformation (if any) is more stable.arrow_forwardPlace the methyl groups by drawing the axial and equatorial positions on the cyclohexane structure in the chair conformations next to the cyclohexane derivatives named below.arrow_forwardDraw all the possible conformations of trans- and cis-1,3-dimethylcyclobutane. Which of these conformations is the most stable conformation? Explain your answer. Discuss the type of strain(s) that affect the stability of these compounds.arrow_forward
- Looking alongC1−C2andC4−C5bonds, draw a Newman projection for each of the two chair conformations of trans 1,2-dimethylcyclohexane.arrow_forwardwould there be conformations if all of the carbons in cyclohexane are in one plane?arrow_forwardDetermine which cyclohexane structure has the MOST energy (is the LEAST stable)?arrow_forward
- 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_forwardPlace the methyl groups by drawing the axial and equatorial positions on the cyclohexane structure in the chair conformations next to the cyclohexane derivatives named below.arrow_forwardWhat are 2 similarities between butane and isobutane in the most stable conformation? What are 2 differences?arrow_forward
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