Principles of Instrumental Analysis, 6th Edition
Principles of Instrumental Analysis, 6th Edition
6th Edition
ISBN: 9788131525579
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cenage Learning
Question
Book Icon
Chapter 19, Problem 19.29QAP
Interpretation Introduction

(a)

Interpretation:

The high-resolution proton NMR spectrum of cyclohexane is to be stated.

Concept introduction:

The nuclear magnetic resonance (NMR) instrument analyzes the material’s molecular structure by placing the material in the strong magnetic field and measuring the spins.

The NMR spectroscopy measures the following property of the material molecules:

  • Chemical shift:

    Appearance of the atomic group composition in the molecule.

  • The spin-spin coupling constant:

    It provides information about the appearance of the adjacent atoms.

  • Relaxation time:

    It provides information about molecular dynamics.

  • Signal intensity:

    It provides the quantitative information about the atomic ratios within a molecule which determines the molecular structure, and proportions of different compounds in a mixture.

Interpretation Introduction

(b)

Interpretation:

The high-resolution proton NMR spectrum of diethyl ether is to be stated.

Concept introduction:

The nuclear magnetic resonance (NMR) instrument analyzes the material’s molecular structure by placing the material in the strong magnetic field and measuring the spins.

The NMR spectroscopy measures the following property of the material molecules:

  • Chemical shift:

    Appearance of the atomic group composition in the molecule.

  • The spin-spin coupling constant:

    It provides information about the appearance of the adjacent atoms.

  • Relaxation time:

    It provides information about molecular dynamics.

  • Signal intensity:

    It provides the quantitative information about the atomic ratios within a molecule which determines the molecular structure, and proportions of different compounds in a mixture.

Interpretation Introduction

(c)

Interpretation:

The high-resolution proton NMR spectrum of 1,2-dimethoxyethane, CH3OCH2CH2OCH3.

Concept introduction:

The nuclear magnetic resonance (NMR) instrument analyzes the material’s molecular structure by placing the material in the strong magnetic field and measuring the spins.

The NMR spectroscopy measures the following property of the material molecules.

  • Chemical shift:

    Appearance of the atomic group composition in the molecule.

  • The spin-spin coupling constant:

    It provides information about the appearance of the adjacent atoms.

  • Relaxation time:

    It provides information about molecular dynamics.

  • Signal intensity:

    It provides the quantitative information about the atomic ratios within a molecule which determining the molecular structure, and proportions of different compounds in a mixture.

Blurred answer
Students have asked these similar questions
Every chemist knows to ‘add acid to water with constant stirring’ when diluting a concentrated acid in order to keep the solution from spewing boiling acid all over the place.  Explain how this one fact is enough to prove that strong acids and water do not form ideal solutions.
The predominant components of our atmosphere are N₂, O₂, and Ar in the following mole fractions: χN2 = 0.780, χO2 = 0.21, χAr = 0.01. Assuming that these molecules act as ideal gases, calculate ΔGmix, ΔSmix, and ΔHmix when the total pressure is 1 bar and the temperature is 300 K.
dG = Vdp - SdT + μA dnA + μB dnB + ... so that under constant pressure and temperature conditions, the chemical potential of a component is the rate of change of the Gibbs energy of the system with respect to changing composition, μJ = (∂G / ∂nJ)p,T,n' Using first principles prove that under conditions of constant volume and temperature, the chemical potential is a measure of the partial molar Helmholtz energy (μJ = (∂A / ∂nJ)V,T,n')
Knowledge Booster
Background pattern image
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Principles of Instrumental Analysis
Chemistry
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Cengage Learning