in 'H NMR analysis of organic compounds, what is the parameter δ and why is it...
in 'H NMR analysis of organic compounds, what is the parameter δ and why is it independent of the strength of the magnetic field applied to a sample in an NMR spectrometer?
Homework Answers
It is known as delta..or chemical shift. It gives a measure of the response of the proton to the applied magnetic field. By formula it is calculated as
Chemical shift = precisional frequency/ strength of frequency of instruments in MEGA HERTZ.
Now this precisional frequency is the frequency with which the magnetic field of a proton rotates in presence of an applied magnetic field. It responds in accordance with the radio frequency that is given upon it by the instrument. So if we use a high frequency then the precisional frequency is high.
From the formula itself it is clear that chemical shift or delta is a ratio. And this ratio remains same for all different frequencies applied.
The strength of the magnetic field only splits the spin of the proton , it doesn't do any change in the precisional motion of the proton. So the chemical shift has no effect from strength of NMR instruments.
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in 'H NMR analysis of organic compounds, what is the parameter δ
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