H-1-(TE-125) INDIRECT DETECTION IN NUCLEAR-MAGNETIC-RESONANCE SPECTRAOF ORGANOTELLURIUM COMPOUNDS

Te-125 was measured by inverse proton detection using multiple-quantum H-1-{Te-125} correlation spectroscopy, One-and two-dimensional hetero nuclear multiple quantum coherence (HMQC) experiments are reported for dimethyl telluride, dimethyl ditelluride, benzyl tellurocyanate, trim ethyltelluronium chloride! telluromethionine, tellurophene, 1,4-thiate llurin and di(n-butyl) telluride having a range of Te-125-H-1 coupling constants from 14.6 to 102.5 Hz. The enhancement for indirect rls, di rect Te-125 detection nas estimated for trimethyltelluronium chloride. The theoretical enhancement is 50.7 and that estimated experimentally 46.2. Multiple-quantum H-1-{Te-123} correlation spectroscopy is also illustrated for one example. (C) 1997 John Wiley & Sons, Ltd.