From Tellurium Tetraalkoxides

Tellurium tetraalkoxides and acetyl chloride reacted in benzene to produce tellurium alkoxide chlorides and alkyl acetate. The number of alkoxide groups remaining with the tellurium atom is determined by the molar ratio of the reagents.  

The tellurium alkoxide trichlorides were isolated as adducts containing one mole of alkyl acetate per two moles of tellurium compound.  

Tellurium Triethoxide Chloride 3.70 g (12 mmol) of tellurium tetraethoxide are dissolved in benzene, the solution is cooled, stirred, and0.95g(12 mmol) of acetyl chloride are added dropwise. When the exothermic reaction has subsided, the mixture is heated under gentle reflux for 4 h. All volatile materials are removed under reduced pressure and the residual waxy, white solid is distilled under vacuum yield 1.5 g (41 %) b.p. 13570.4 torr. 

Fluoroalkoxy tellurium chlorides react with iV-trimethylsilylmorpholine in diethyl ether at with preferential replacement of fluoroalkoxy groups. Only two morpholino groups can be introduced into the molecules, even when an excess of the amine is used  

In reactions with benzenesulfonamide or its A ,A -bis[trimethylsilyl] derivative the chlorine atoms are preferentially replaced.  

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