/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q18P Draw a Newman projection along t... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 3: Q18P (page 86)

Draw a Newman projection along the C2-C3 bond of the following conformation of 2,3-dimethylbutane, and calculate a total strain energy:

Short Answer

Expert verified

The total strain energy is 11.4 kJ mol.

Step by step solution

01

Newman Projection 

Newman projections are important for understanding alkane stereochemistry. A chemical bond鈥檚 conformation from front part to back part can be visualized using Newman projection.

02

Drawing the Newman projection and calculating the total strain energy

The confirmation given here is a staggered conformation and the hydrogens on carbons 2 and 3 are60掳 apart.

The Newman projection exhibits three gauche interactions. Each of the interactions have an energy of 3.8 kJ/mol.

Newman projection of the molecule

The total strain energy of the molecule can be given as:

罢辞迟补濒蝉迟谤补颈苍别苍别谤驳测=3脳3.8kJmol=11.4kJmol

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.

Over 30 million students worldwide already upgrade their learning with 91影视!

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

In the next chapter we鈥檒l look at cycloalkanes鈥攕aturated cyclic hydrocarbons鈥攁nd we鈥檒l 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?

Propose structures that meet the following descriptions:

(c) Two isomeric disulfides with the formula C4H10S2

Consider 2-methylbutane (isopentane) sighting along C-2, C-3 bond:

  1. Draw a Newman Projection of the most stable conformer.
  2. Draw a Newman Projection of the most stable conformer.
  3. If aCH3-CH3 eclipsing interaction costs 11kJ/mol (2.5 kcal/mol) and arole="math" localid="1663392343646" CH3-CH3 gauche interaction costs 3.8kJ/mol (0.9 kcal/mol), make a quantitative plot of energy versus rotation about the C-2 C-3 bond.

Draw the structures of the following molecules:

(c) Glycerol, C3H8O3, a substance isolated from fat and used in cosmetics;

it has an -OH group on each carbon.

In each of the following sets, which structures represent the same compoundand which represent different compounds?

(a)
See all solutions

Recommended explanations on Chemistry Textbooks

The Earths Atmosphere

Read Explanation

Ionic and Molecular Compounds

Read Explanation

Nuclear Chemistry

Read Explanation

Inorganic Chemistry

Read Explanation

Organic Chemistry

Read Explanation

Physical 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.