Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 4: Q.20. (page 128)

Question: Calculate the destabilization present in each eclipsed conformation.

a.

b.

Short Answer

Expert verified

Answer

a. The destabilization energyis 3.8 kcal/mol.

b. The destabilization energy is 4.2 kcal/mol.

Step by step solution

01

Conformation

The two main types of conformations are:

  • eclipsed and
  • staggered.

These are based on the dihedral angle.

The conformations are shown below:

Eclipsed and Staggered

02

Calculation of the destabilization energy of a

a. There is one H, H and two CH3, H eclipsing interactions in the given conformation. The value of the destabilization energyis calculated as follows:

role="math" localid="1648531767188" ∆E=1H,Heclipsing+2CH3,Heclipsing=1×1.0+2×1.4kcal/mol=3.8kcal/mol

Thus, the destabilization energy is 3.8 kcal/mol.

03

Calculation of the destabilization energy of b

b. There are three CH3, H eclipsing interactions in the given conformation. The value of the destabilization energy is calculated as follows:

∆E=3CH3,Heclipsing=3×1.4kcal/mol=4.2kcal/mol

Thus, the destabilization energy is 4.2 kcal/mol.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Question: The torsional energy in propane is 14 kJ/mol (3.4 kcal/mol). Because each H,H eclipsing interaction is worth 4.0 kJ/mol (1.0 kcal/mol) of destabilization, how much is one H, CH3 eclipsing interaction worth in destabilization? (See Section 4.10 for an alternate way to arrive at this value.)

Draw the staggered and eclipsed conformations that result from rotation around the C-C bond inCH3-CH2Br.

Give the IUPAC name for each compound.

a

b.

c.

d.

e.

f.

Question: Give the IUPAC name for each compound.

Question: Name each alkane using the ball-and-stick model, and classify each carbon as 10,20,30, or 40.

a.

b.
See all solutions

Recommended explanations on Chemistry Textbooks

Chemical Reactions

Read Explanation

Organic Chemistry

Read Explanation

Making Measurements

Read Explanation

The Earths Atmosphere

Read Explanation

Ionic and Molecular Compounds

Read Explanation

Nuclear Chemistry

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free