Answer true or false. Conformations have the same molecular formula and the same connectivity but differ in the three-dimensional arrangement of their atoms in space. In all conformations of ethane, propane, butane, and higher alkanes, all C—C—C and H—C—H bond angles are approximately 109.5°. In a cyclohexane ring, if an axial bond is above the plane of the ring on a particular carbon, axial bonds on the two adjacent carbons are below the plane of the ring. In a cyclohexane ring, if an equatorial bond is above the plane of the ring on a particular carbon, equatorial bonds on the two adjacent carbons are below the plane of the ring. The more stable chair conformation of a cyclohexane ring has more substituent groups in equatorial positions.

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Introduction to General, Organic a...

11th Edition
Frederick A. Bettelheim + 4 others
Publisher: Cengage Learning
ISBN: 9781285869759
BuyFind

Introduction to General, Organic a...

11th Edition
Frederick A. Bettelheim + 4 others
Publisher: Cengage Learning
ISBN: 9781285869759

Solutions

Chapter 11, Problem 11.30P
Textbook Problem

Answer true or false.

  1. Conformations have the same molecular formula and the same connectivity but differ in the three-dimensional arrangement of their atoms in space.

  • In all conformations of ethane, propane, butane, and higher alkanes, all C—C—C and H—C—H bond angles are approximately 109.5°.
  • In a cyclohexane ring, if an axial bond is above the plane of the ring on a particular carbon, axial bonds on the two adjacent carbons are below the plane of the ring.
  • In a cyclohexane ring, if an equatorial bond is above the plane of the ring on a particular carbon, equatorial bonds on the two adjacent carbons are below the plane of the ring.
  • The more stable chair conformation of a cyclohexane ring has more substituent groups in equatorial positions.
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    Chapter 11 Solutions

    Introduction to General, Organic and Biochemistry
    Ch. 11 - 11-11 Define: Hydrocarbon Alkane Saturated...Ch. 11 - 11-12 Why is it not accurate to describe an...Ch. 11 - 11-13 What is meant by the term line-angle formula...Ch. 11 - Prob. 11.14PCh. 11 - Write the molecular formula for each alkane.Ch. 11 - Answer true or false. Constitutional isomers have...Ch. 11 - Which statements are true about constitutional...Ch. 11 - Prob. 11.18PCh. 11 - Each member of the following set of compounds is...Ch. 11 - Prob. 11.20PCh. 11 - 11-21 In the six following sets, which pairs of...Ch. 11 - Draw line-angle formulas for the nine...Ch. 11 - Answer true or false. The parent name of an alkane...Ch. 11 - Prob. 11.24PCh. 11 - Among the ingredients listed in one commercial...Ch. 11 - Answer true or false. The two major sources of...Ch. 11 - Answer true or false. Cycloalkanes are saturated...Ch. 11 - Prob. 11.28PCh. 11 - Write line-angle formulas for these alkanes and...Ch. 11 - Answer true or false. Conformations have the same...Ch. 11 - The condensed structural formula of butane is...Ch. 11 - 11-32 Calculate the actual C-C-C bond angles in...Ch. 11 - Answer true or false. Cis- and trans-cycloalkanes...Ch. 11 - 11-34 What structural feature of cycloalkanes...Ch. 11 - Is cis-trans isomerism possible in alkanes?Ch. 11 - 11-36 Name and draw structural formulas for the...Ch. 11 - Name and draw structural formulas for the six...Ch. 11 - 11-38 Why is equatorial methylcyclohexane more...Ch. 11 - Prob. 11.39PCh. 11 - Consider a cyclohexane ring substituted with one...Ch. 11 - Answer true or false. Boiling points among alkanes...Ch. 11 - In Problem 11-22, you drew structural formulas for...Ch. 11 - Which unbranched alkane (Table 11-4) has about the...Ch. 11 - 11-44 What generalizations can you make about the...Ch. 11 - 11-45 What generalization can you make about the...Ch. 11 - Suppose that you have samples of hexane and...Ch. 11 - As you can see from Table 11-4, each CH2 group...Ch. 11 - 11-48 How are the boiling points of hydrocarbons...Ch. 11 - Answer true or false. Combustion of alkanes is an...Ch. 11 - 11-50 Write balanced equations for the combustion...Ch. 11 - The heat of combustion of methane, a component of...Ch. 11 - 11-52 Draw structural formulas for these...Ch. 11 - The reaction of chlorine with pentane gives a...Ch. 11 - 11-54 Complete and balance the equation for the...Ch. 11 - Name and draw structural formulas for all pos...Ch. 11 - There are three constitutional isomers with the...Ch. 11 - Answer true or false. Freons are members of a...Ch. 11 - 11-58 (Chemical Connections 11A) How many rings in...Ch. 11 - (Chemical Connections 1 IB) What is an “octane...Ch. 11 - 11-60 (Chemical Connections 11B, Octane has an...Ch. 11 - (Chemical Connections 11B) Ethanol is added to...Ch. 11 - 11-62(Chemical Connections 11C) What are Freons?...Ch. 11 - 11-63 (Chemical Connections 11C) In what way do...Ch. 11 - (Chemical Connections 11C) What are HFCs and...Ch. 11 - Prob. 11.65PCh. 11 - Explain why each of the following is an incorrect...Ch. 11 - Which of the following compounds can exist as...Ch. 11 - Tetradecane, C14H30, is an unbranched alkane with...Ch. 11 - Dodecane, C12H26, is an unbranched alkane Predict...Ch. 11 - Prob. 11.70PCh. 11 - On the left is a representation of the glucose...Ch. 11 - On the left is a representation for...Ch. 11 - As stated in Section 11-9, the wax found in apple...Ch. 11 - Following are structural formulas for dimethyl...

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