NMR of Organoselenium and Organotellurium Compounds

Abstract

AbstractThis chapter gives a systematic account of and surveys the available data on77Se and125Te NMR spectra of organochalcogen compounds such as chacogenols, mono and dichalcogenides, chalcogenolates, tetra and hexa substituted chalcogen compounds, chalcogenyl halides, chalcogen‐containing heterocycles and macrocycles, chalcogen‐oxygen/nitrogen compounds, etc. The review is based on the literature from 1985 to 2011 and includes 780 references. The77Se/125Te NMR spectra of organochalcogen compounds reveal expansive chemical shifts (δSe/δTe) leading to sharp sensitivity of these nuclei (Se/Te) to their environment such as solvent, temperature, molecular geometry, ligand backbone, oxidation state, chelate ring size, steric strain, etc. This is well illustrated by the advantageous use of this spectroscopy in the successful determination of the solution state structure of several organochalcogen compounds. It is noted that the125Te and77Se chemical shifts of a large number of structurally similar organotellurium and selenium compounds show linear relationship.