Priv.-Doz. Dr. Reinhard Benn and Dr. Anna Rufińska
Recently developed techniques of NMR spectroscopy have allowed the investigation of metal nuclei having the nuclear spin quantum number 1/2 as well as of those with a nuclear quadrupole moment. The information available from the chemical shifts of selected metal nuclei (25Mg, 27Al, 49Ti, 57Fe, 59Co, 61Ni, 91Zr, 103Rh, and 195Pt) is especially well demonstrated for selected organometallic compounds. There exist relations between chemical shift and coordination number, oxidation states, and electron configuration of complex-bound metal atoms. The interpretation of the chemical shift of the metal nucleus in terms of frontier orbitals and thus in terms of the reactivity of the complexes is illustrated by several examples.