With Loss of the Alkylidene Group

Diorgano 2,6-dimethyl-4,4-dioxocyclohexylidene tellurium compounds lost the cyclo-hexylidene group upon treatment with elemental halogens in chloroform.  

4-Dimethyl-2,6-dioxo-cyclohexylidene methyl 4-methylphenyl tellurium reacted similarly. The diaryl tellurium dihalides were isolated in quantitative yields. 

Diorgano 4,4-dimethyl-2,6-dioxo-cyclohexylidene tellurium compounds were also converted to diorgano tellurium dihalides by hydrogen halides in boiling ethanol and to diorgano tellurium diacetates by acetic acid.  

Boiling 0.25 molar solutions of diaryl 4,4-dimethyl-2,6-dioxocyclohexylidene tellurium compounds in 1,2-dimethylbenzene for 1 h yielded diorgano telluriums and a trimeric cyclohexyl derivative.  

Dialkyl vinylmethylidene tellurium compounds reacted with aliphatic and aromatic aldehydes to form dialkyl telluriums and a,)8-unsaturated oxiranes cisjtrans mixtures with the c/s-isomer as the predominant component) in yields as high as 94%.  

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