Technetium complexes dithiol

The complex formation of technetium, rhenium, and molybdenum with toluene-3,4-dithiol and its analytical application have been studied by Koyama et al. . 

Microgram amounts of TcOj can be ascertained by measuring the absorbance of the colored complex, formed with toluene-3,4-dithiol in 2.1 M HCl, after extraction into carbon tetrachloride. One hour must be allowed for the development of the color. ITie molar absorbance index at 410 nm is 1.1-10" mole -1-cm. Beer s law is followed over the range of 1.1 to 16.1 pg Tc/ml. Because many cations interfere, an initial separation of technetium is necessary [73]. The same complex was used for the determination of technetium in uranium fission element alloys after separation of Tc by distillation from sulphuric acid [74j. I hc complex formation of technetium, rhenium, and molybdenum with toluene-3,4-dithiol and its analytical application have been studied in detail [71]. 

From the reaction of K2[TcCl6], suspended in methanol, with excess ethane-1,2-dithiol (H edt), the anionic technetium(V) sulphido complex [TcS(edt)2]" was prepared in low yield. Oie mixture was heated at reflux temperature under an argon atmosphere. 

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