Interpretation:
The number of protons giving rise to each signal in the spectrum of a compound with molecular formula
Concept Introduction:
Integration is one of the characteristics of proton NMR spectrum which is the area under each signal. After acquiring a spectrum, a computer calculates the area under each signal, and then displays this area as a numerical value placed under the signal which is relative only.
In order to convert the integration values into useful information, a smallest number should be chosen and then all integration values should be divided by this number. If the numerical values are not whole numbers, then in order to arrive at whole numbers all the numbers should be multiplied by a suitable integer.
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EBK ORGANIC CHEMISTRY AS A SECOND LANGU
- In a proton NMR spectrum, indicate the number of peaks and their multiplicity for the following compounds: CH3 - CH2 - CO - CH3 para-chloromethylbenzenearrow_forwardAnalyze the following proton NMR spectrum for a compound with the chemical structure C10H12O2. Draw the structure of the compound.arrow_forwardFor the following compound how many different signals would you see in the carbon NMR? (Assume that you can see them all.) 4 O 5 O 3 09 CO |arrow_forward
- Analyze the following proton NMR spectrum for a compound with the chemical structure C10H12O2. Draw the structure of the compound.arrow_forwardA'H NMR spectrum is shown for a molecule with the molecular formula of CeH9Br. Draw the structure that best fits this data.arrow_forwardFor the dimedone molecule, how many different signals would you see in the proton NMR? Assume you can see them allarrow_forward
- The line of integration of the two signals in the 1H-NMR spectrum of a ketone with the molecular formula C7H14O rises 62 and 10 chart divisions, respectively. Calculate the number of hydrogens giving rise to each signal and propose a structural formula for this ketone.arrow_forwardA compound with the molecular formula C5H1002 has the following NMR spectrum. Determine the number of protons giving rise to the signal at 1.0 ppm. Proton NMR 4.5 01 06 04 02 O 3 4.0 33.2 3.5 3.0 2.5 Integration Values 2.0 48.4 مللی 1.5 33.3 1.0 48.7 0.5 ppmarrow_forwardThe 1H-NMR spectrum of 1-chloropropane shows three signals and the 1H-NMR spectrum of 2-chloropropane shows two signals. Draw these two molecules and determine the relative integrals of each signal.arrow_forward
- Predict the number of signals in a proton-decoupled 13C-NMR spectrum of each compoundarrow_forwardThe following 1H NMR peaks were recorded on a spectrometer operating at 200 MHz. Convert each into δ units. (a) CHCl3; 1454 Hz (b) CH3Cl; 610 Hz (c) CH3OH; 693 Hz (d) CH2Cl2; 1060 Hzarrow_forwardThe number of unique carbons in a molecule will correspond to the number of signals in the ¹³C NMR spectrum. Identify the number of unique carbons in this structure. Br Br 1 4 7 +/- unique carbons 8 . 6 9 0 X C x 100 +arrow_forward
- Principles of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning