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Timeline for Why does NMR deal with protons?

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Feb 11, 2017 at 14:05 comment added matt_black NMR does deal with electrons, but not their spin. The nuclear environment that determines the NMR resonance of a nucleon is dependent on the electrons in the molecule and features like peak splitting are a result of transmission via electrons of features dependent on remote nuclei.
Feb 11, 2017 at 2:56 comment added MaxW EPR only works for unpaired electrons. Most organic compounds have only paired electrons. Organometallic complexes are fairly rare in the overall scheme of things.
Feb 11, 2017 at 2:43 answer added long timeline score: 5
Feb 11, 2017 at 0:12 comment added TLo So can I know why electron spin are also not used to know a molecules structure in orgo? Why just focus on NMR? Does NMR have more usefulness?
Feb 10, 2017 at 23:07 comment added Zhe Electron spins are used for spectroscopy. The expected energy gap is different so you would be looking in a different area of the EM spectrum (i.e., microwave versus radio). See: en.wikipedia.org/wiki/Electron_paramagnetic_resonance
Feb 10, 2017 at 21:52 comment added MaxW Your question and title are inconsistent. All nuclei aren't just a proton. $\ce{^13C}$ is also used for NMR studies as well as other isotopes.
Feb 10, 2017 at 21:51 comment added orthocresol The energy gap between "up" and "down" spin states of an electron is much larger than the energy gap between the two spin states of a proton. So, the spectra don't quite interfere. It is possible to do what is essentially NMR, but on an electron: en.wikipedia.org/wiki/Electron_paramagnetic_resonance
Feb 10, 2017 at 21:32 history asked TLo CC BY-SA 3.0