Principles of Instrumental Analysis
7th Edition
ISBN: 9781305577213
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Question
Chapter 19, Problem 19.34QAP
Interpretation Introduction
Interpretation:
The name of the organic compound from the following proton NMR data should be predicted.
Concept introduction:
Nuclear magnetic resonance is a technique that is used to predict the structural formula of the compound. NMR spectroscopy involves the examination of the nucleus under the external magnetic field.
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
In a 300 MHz NMR spectrometer, A) what is the
Larmor frequency in MHz of a 15N nucleus? g
H
=
N
26.752; g = 2.7126; B) Using the same NMR
instrument, suppose that a 13C nucleus from a
sample generates a signal which has a frequency
of 11,250 Hz higher than that from the carbons in
TMS. What is the chemical shift of that carbon
atom from the sample?
A) 30 MHz; B) 0.15 ppm
OA) 25 MHz; B) 0.35 ppm
A) 35 MHz; B) 0.30 ppm
OA) 25 MHz; B) 0.55 ppm
The organic compound 1,4-dimethylbenzene (also known as p-xylene) has the formula (CH3)2C6H4. Its structure has two CH3 (methyl) groups substituted at opposite positions on the benzene (C6H6) ring. Predict the number of peaks in the low-resolution proton NMR spectrum of this compound and the relative areas of the peaks.
What would be the nuclear magnetic resonance spectrum for a proton resonance line that was split by interaction with seven identical protons?
Chapter 19 Solutions
Principles of Instrumental Analysis
Ch. 19 - Prob. 19.1QAPCh. 19 - Prob. 19.2QAPCh. 19 - Prob. 19.3QAPCh. 19 - Prob. 19.4QAPCh. 19 - Prob. 19.5QAPCh. 19 - A nucleus has a spin quantum number of 7/2. How...Ch. 19 - Prob. 19.7QAPCh. 19 - Prob. 19.8QAPCh. 19 - Prob. 19.9QAPCh. 19 - Why is 133C-133C spin-spin splitting not observed...
Ch. 19 - Prob. 19.11QAPCh. 19 - Prob. 19.12QAPCh. 19 - Prob. 19.13QAPCh. 19 - What is a rotating frame of reference?Ch. 19 - How will E for an isolated 13C nucleus compare...Ch. 19 - Prob. 19.16QAPCh. 19 - Prob. 19.17QAPCh. 19 - Prob. 19.18QAPCh. 19 - Prob. 19.19QAPCh. 19 - Prob. 19.20QAPCh. 19 - Prob. 19.21QAPCh. 19 - Prob. 19.22QAPCh. 19 - Prob. 19.23QAPCh. 19 - Prob. 19.24QAPCh. 19 - Prob. 19.25QAPCh. 19 - Prob. 19.26QAPCh. 19 - Prob. 19.27QAPCh. 19 - Prob. 19.28QAPCh. 19 - Prob. 19.29QAPCh. 19 - Prob. 19.30QAPCh. 19 - The proton NMR spectrum in Figure 19.39 is for an...Ch. 19 - The proton NMR spectrum in Figure 19-40 is for a...Ch. 19 - Prob. 19.33QAPCh. 19 - Prob. 19.34QAPCh. 19 - Prob. 19.35QAPCh. 19 - From the proton NMR spectrum in Figure 19-44,...Ch. 19 - From the proton spectrum given in Figure 19-45,...Ch. 19 - Prob. 19.38QAPCh. 19 - Prob. 19.39QAPCh. 19 - Prob. 19.40QAPCh. 19 - Prob. 19.41QAPCh. 19 - Prob. 19.42QAP
Knowledge Booster
Similar questions
- The proton NMR spectrum in Figure 19-40 is for a compound having an empirical formula C4H7BrO2. Identify the compound.arrow_forwardFrom the proton spectrum given in Figure 19-45, determine the structure of this compound, a commc used painkiller; its empirical formula is C10H13NO2.arrow_forwardSketch the form of an A3M2X4 spectrum, where A, M, and X are protons with distinctly different chemical shifts and JAM > JAX > JMX ·arrow_forward
- The centre of the EPR spectrum of atomic hydrogen lies at 329.12 mT in a spectrometer operating at 9.2231 GHz. What is the g-value of the electron in this atom?arrow_forwardWhat will be the 1H-NMR spectrum for the next molecule BrClCHCH2COCH3 and illustrate the corresponding signals according to their chemical displacement, multiplicity and integration. Indicate two basic differences that exist between the spectra of 1H y 13C in NMR. Establish the difference between the multiplicity of a signal and the integral (integration) of the signal in spectroscopy of 1H-NMR.arrow_forwardThe picture of the question is attachedarrow_forward
- 13C(1h) what is bracket mean in this case? is that mean carbon nmr proton nmr in same time?arrow_forwardEstablish the difference between the multiplicity of a signal and the integral (integration) of the signal in spectroscopy of 1H-NMR.arrow_forward(i) Identify TWO (2) functional groups presence in the molecule and state their frequencies. (ii) Predict the possible chemical structure of molecule based on the IR spectra with chemical formula C7H8.arrow_forward
- (a) Calculate the energy difference between the two spin states of 1H and of 13C in a magnetic field of 6.8 T. 1H 4.0 1.19e-25 X J 13C 4.0 J (b) What is the precession frequency of a 1H nucleus at this magnetic field? Of a 13C nucleus? 1H 4.0 290 MHz 13C 4.0 73 MHz (c) At what magnetic field do protons precess at a frequency of 300. MHz? 4.0 7.04 Tarrow_forwardSketch the form of an A2M2X3 spectrum, where A, M, and X are protons with distinctivelydifferent chemical shifts, and JAM > JAX> JMX. What is the total number of lines in thespectrum?arrow_forwardFill in the Blanks Type your answers in all of the blanks and submit X₂ X² Ω· Determine the number of signals in the ¹H-NMR spectrum of the given compound as well as the ratio of its integrated signals. Number of signals: 7 Integration: 1 You are incorrect You are incorrect X X (express as the lowest whole number ratio from smallest to largest, e.g.,arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Principles of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage LearningOrganic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage LearningPrinciples of Modern ChemistryChemistryISBN:9781305079113Author:David W. Oxtoby, H. Pat Gillis, Laurie J. ButlerPublisher:Cengage Learning
- Physical ChemistryChemistryISBN:9781133958437Author:Ball, David W. (david Warren), BAER, TomasPublisher:Wadsworth Cengage Learning,Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning
Principles of Instrumental Analysis
Chemistry
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Cengage Learning
Organic Chemistry
Chemistry
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:Cengage Learning
Principles of Modern Chemistry
Chemistry
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:Cengage Learning
Physical Chemistry
Chemistry
ISBN:9781133958437
Author:Ball, David W. (david Warren), BAER, Tomas
Publisher:Wadsworth Cengage Learning,
Organic Chemistry: A Guided Inquiry
Chemistry
ISBN:9780618974122
Author:Andrei Straumanis
Publisher:Cengage Learning