Tellurium-125 NMR and mass spectra of dithiotellurides

Abstract

The preparation, 125Te NMR and mass spectra of some dithiotellurides, Te(RS) 2 (R = Ph, 2-PhCOOH, CPh 3, CH 2Ph, 3-PrCOOH, n-Bu, i-Pr, t-Bu) are discussed. The 125Te chemical shifts have been found to lie within a range spanning ca. 690 ppm and correlate with the p K a values of the parent thiols. The mass spectra of the alkyl derivatives (R = n-Bu, i-Pr, t-Bu) indicate an initial step-wise loss of alkenyl groups followed by the elimination of hydrogen sulfide from the resultant bis(hydrosulfido)-tellurium ion.