Nuclear Magnetic Resonance Spectroscopy of Paramagnetic Species

摘要: Publisher Summary This chapter focuses on the nuclear magnetic resonance spectroscopy (NMR) of paramagnetic species. Isotropic shifts in NMR spectra species may arise from either or both two different mechanisms, one which produces contact interactions while other gives rise to dipolar pseudo-contact between unpaired electronic and spins. To obtain realistic estimates spin density distribution geometry a theoretical description induced is required, not founded these assumptions. hyperfine splittings ESR provide electrons The most prolific growth area during last four years, field studies species, has been that dealing with lanthanide shift reagents. presence covalent bonds metal its ligands provides pathway for delocalization throughout molecule. ensuing nuclei reveal mode delocalization. molecules very small structural differences are often almost identical. centre tends amplify slight spectroscopic arising subtle changes structure. A study can lead information various forms equilibria isomerism as well data. formation complexes be studied by means line broadenings observed ligand molecules.