Lanthaniden-Verschiebungen in der ¹H- und ¹³C-Kernresonanzspektroskopie zur Konstitutionsermittlung von Thiadiazoloxiden / Lanthanide Induced Shifts in the ¹H and ¹³C Nuclear Magnetic Resonance Spectroscopy for Structure Elucidations of Thiadiazole Oxides

Abstract

<jats:title>Abstract</jats:title><jats:p> A systematic investigation of the LIS-method for structure elucidations is performed on the basis of thermally generated monoxides of 1,2,3-thiadiazoles. A calculation process for the evaluation of lanthanide induced shifts according to the McConnell-Robertson equa-tion was developed. The program can be applied to underdetermined systems with fewer variables than chemically not equivalent X H plus 13 C nuclei. A quality criterium for the method is given by 4-phenyl-l,2,3-thiadiazole-3-oxid -wellknown by an X-ray analysis.</jats:p>