What is the diff between nuclear magnetic resonance spectroscopy and electron resonance spectroscopy?
They are based on differentphenomenas. Nuclear Magnetic Resonance (NMR) is based on resonance absorption of radiation by nucleus. When Electron Resonance (ER) is based on resonance absorption of radiation by electrons (in conjugated state). Both events have different physics and conditions when it can be used. Usually NMR is much weaker than ER but it gives very important information which you cannot get using ES, for instance, using NMR many atoms can identified. ES cannot do that.