Viewing papers 1-2 of 2 for nmr AND spectra AND nuclear AND magnetic AND resonance

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NMR Spectra Nuclear Magnetic Resonance Research Paper

… Carbon 13 (13C) is not naturally abundant but provides a spin state of 1/2 or -1/2 and gives a NMR signal. NMR spectroscopy of 13C observes the skeleton of an organic molecule and allows determination of the chemical shift for every carbon atom whether a proton is attached or not. One useful property of 13C NMR is the broad chemical shift when compared to proton NMR chemical shifts. While a 1H NMR spectrum might have a shift of 10-20 ppm, a 13C spectrum can cover ranges of up to 200 ppm allowing far less overlapping of peaks for carbon atoms with different chemical shifts (Carey 2008). In addition, 13C has a low natural abundance and this low percentage results in few adjacent carbon atoms in…. [read more]

Proton and Carbon NMR Research Paper

… Proton and Carbon NMR

In chemistry one of the most common issues is constant change. This is based on chemical properties continually transforming into different states. In some cases, these shifts are visible to naked eye. While at other times, they are visible only through specialized tools. When it comes to the use of proton and carbon, these changes are visible by looking at the nuclear magnetic resonance spectrometry (NMR). This is a device that will examine what is happening by focusing on the carbon skeleton and the hydrogen molecules that are attached to them (from different environments). (Carey, 2008, pg. 517) to fully understand how this is occurring we will examine the use of protons / carbon NMR structure determination, 2D NMR and the…. [read more]

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