From diorganyl ditellurides or arenetellurenyl halides and organometallic reagents

5 From diorganyl ditellurides or arenetellurenyl halides and organometallic reagents 

A different approach to unsymmetrical diorganyl tellurides, in which an electrophilic tellurium species is used, involves the nucleophilic attack of organomagnesium or organo-lithium reagents to diorganyl ditellurides. 

Only half of the tellurium of the starting ditelluride is converted into telluride. The other half, converted into tellurolate, can be oxidatively recovered as the starting ditelluride. 

Unsymmetrical diorganyl tellurides (general procedure). A solution of the ditelluride (2 nunol) in THE (30 mL) is treated dropwise at 0°C under N2 with Br2 (0.32 g, 3 mmol) 

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