EPR—See Electron paramagnetic

EPR, see Electron paramagnetic resonance Equilibrium constants, metal-assisted aquation reactions, 34 168-169... 

EPR see Electron paramagnetic resonance Ergosterol 3,6-acetate, triplet oxygen cycloaddition, 211... 

Depending on the wavelength of radiation used, irradiation of Co2(CO)g produces either CO dissociation (at 250 nm) or cleavage into Co(CO)4 radicals (at 360 nm). The radical Co(CO)4 (2) itself has been detected by its Raman, infrared, UV-vis, and EPR see Electron Paramagnetic Resonance) spectra. It can be found by EPR when (1) is heated and sublimed on a 77 K cold finger in the EPR cavity, or it can be generated in a matrix at low temperature either by photolysis of (1) or by the metal vapor technique see Metal Vapor Synthesis of Transition Metal Compounds). 

The paramagnetism of many lanthanide ions finds practical application in NMR shift reagents and, increasingly, in MRI contrast agents. EPR (see Electron Paramagnetic Resonance) spectra are only readily obtained from Gd +, with its ground state, as yet there has been little study of the effects of environment upon the spectra. 

To determine Fe(IV)=0 and radical character of the transient intermediate unambiguously, RFQ experiments have been performed in conjunction with Mossbauer spectroscopy and multifrequency EPR see Electron Paramagnetic Resonance (EPR) Spectroscopy, Figure 3) 55,109,110,iis-ii ... 

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