/*! 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} Q24P Explain the relative chemical sh... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 14: Q24P (page 640)

Explain the relative chemical shifts of the benzene ring protons in Figure 14.18.

Short Answer

Expert verified

For proton a it is 7.52 ppm.

For proton b it is 7.64 ppm.

For proton c it is 8.21 ppm.

Step by step solution

01

Step-by-Step SolutionStep 1: Chemical shift  value

The chemical shift represents the position of signals with respect to some standard reference compound TMS. It also represents the processional frequency of different protons present in a molecule.

The chemical shift value for each proton in a benzene ring is near about 7.2 ppm.

02

Chemical shift value for protons of the benzene ring

If the electron-withdrawing group is attached then de-sheilding occurs and the chemical shift value increases. Hence, chemical shift value for c proton is relatively high which is 8.21 ppm, while for proton a and b it is 7.52 ppm and 7.64 ppm, respectively.

Protons in benzene ring

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

When compound A ( C5H11Br) is treated with HBr, it forms compound B (C5H11Br ). The 1 H NMR spectrum of compound A has a 1H singlet, a 3H doublet, a 6H doublet, and two 1H multiplets. The 1 H NMR spectrum of compound B has a 6H singlet, a 3H triplet, and a 2H quartet. Identify compounds A and B.

Which has a greater chemical shift for the proton, the proton H1NMR spectrum of pure ethanol or the proton H1NMR spectrum of ethanol dissolved in CH2Cl2.

Which underlined proton (or sets of protons) has the greater chemical shift (that is, the higher frequency signal)?

Propose a mechanism for proton exchange of an alcohol in aqueous base.

Identify the compound with a molecular formula C6H10O that gives the following DEPT 13C NMR spectrum:
See all solutions

Recommended explanations on Chemistry Textbooks

Nuclear Chemistry

Read Explanation

Physical Chemistry

Read Explanation

Chemistry Branches

Read Explanation

Kinetics

Read Explanation

Chemical Reactions

Read Explanation

The Earths Atmosphere

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.