¹H and ¹³C NMR structural studies in solution of oxotechnetium(V) complexes with <i>N,N</i>‐bis(2‐mercaptoethyl)‐<i>N′,N′</i>‐diethylethylenediamine and <i>N,N</i>‐bis(2‐mercaptoethyl)‐2‐ethylthioethylamine

Abstract

Abstract The complete assignments of the 1 H and 13 C resonances of three TcOLX complexes of oxotechnetium(V)‐99 with H 2 L= N,N ‐bis(2‐mercaptoethyl)‐ N′,N′ ‐diethylethylenediamine or N,N ‐bis(2‐mercaptoethyl)‐2‐ethylthioethylamine and X= p ‐methoxythiophenolate or chloride ions are reported. Chemical shifts are influenced by the proximity of protons and carbons to the coordinated heteroatoms and by their orientation with respect to the TcO core. The NMR spectra at room temperature are the result of motionally averaged conformations.