From Sodium Arenetellurolates

Sodium arenetellurolates reacted with disodium tetrachloropalladate(Il) in ethanol. With equimolar amounts of the reagents, polymeric complexes with one chloride and one arenetellurolate group per palladium atom were formed.  

Prepared in this manner were the following compounds li-chloro-fi-henzenetellurolatopalladium(II) dec. 130° yield 66% 

Under similar conditions but with 2 moles of arenetellurolate per mole of disodium tetrachloropalladate (II), bis [/r-arenetellurolato] palladium compounds were obtained.  

Sodium arenetellurolates and 1,5-cyclooctadienedichloropalladium condensed in ethanol at 20 . Mononuclear complexes with one or two arenetellurolate ligands in the molecule were obtained depending on the molar ratio of the reagents.  

The dark-brown palladium complexes were obtained in yields ranging from 50 to 80%. Their decomposition temperatures are in the range 130° to 145°. 

---

Arylselenomethyl aryl telluriums are obtained from sodium arenetellurolates and (arylseleno)bromomethanes. The tellurolates are generated by the reduction of diaryl ditelluriums with sodium borohydride2. 

Sodium arenetellurolates condensed with aroyl chlorides6 to produce aroyl aryl tellurium derivatives (p. 501). Acetic and propanoic anhydrides reacted similarly7. Butyl aroyl or acyl tellurium compounds were obtained from reactions between lithium (sodium) butanetellurolates and aroyl chlorides6-8, acyl chlorides8, or acetic anhydride9. 

Lithium alkanetellurolates, prepared from tellurium and an alkyl lithium compound or dialkyl ditellurium derivatives and hthium, and sodium arenetellurolates, obtained from diaryl ditellurium compounds and sodium borohydride ", reacted with triorganosilyl, -germyl, -stannyl, and -plumbyl chlorides to produce, for instance, organo triorganosilyl tellurium compounds. 

When aqueous solutions of sodium arenetellurolates and cyclopentadienylbis[tributyl-phosphanejnickel chloride were mixed at 20° under an atmosphere of nitrogen, oils were formed immediately. The oils were extracted with benzene, the extracts dried over anhydrous calcium chloride, and the dried extracts evaporated. The residues were recrystallized from pentane. The complexes were obtained in yields ranging from 76 to 88%. 

Tellurols, derivatives of dihydrogen telluride, have received little attention. Only methane-, ethane-, propane-, and butane tellur ol have been isolated from reactions of aluminum telluride with alcohols at 300° or from additions of alkyl bromides to a solution of dihydrogen telluride in absolute ethanol containing sodium ethoxide (s. Vol. IX, 970). No arenetellurol has yet been isolated. 

Copper(I) alkanetellurolates and arenetellurolates were prepared from the sodium tellurolates or triphenylstannyl organo tellurium compounds and copper(I) chloride. The copper tellurolates are extremely insoluble, polymeric red-brown solids. 

Arenetellurolates, prepared from diaryl ditellurium compounds via reduction with sodium borohydride in organic media, interact with arenediazonium chlorides2 and arenediazonium tetrafluoroborates3 to produce unsymmetrical diaryl tellurium products in yields below 50%. The arenediazonium chlorides were added as aqueous solutions to the tellurolates. Arenediazonium tetrafluoroborates were used as solids. 

Bis 4-ethoxyphenyltelluro methme was also isolated as the dibromomethane adduct (m.p. 154°) or as the diiodomethane adduct (m.p. 118°) from reaction mixtures consisting of the arenetellurolate, the dihalomethane and ethanol/benzene/aqueous sodium hydroxide6. Reactions with dichloromethane gave products of indefinite composition6. 

Arenetellurolato-/x-cliloropanadiiiin(lI) 0.50 mmol of the diaryl ditellurium are dissolved in ethanol at 20°. A solution of sodium borohydride in ethanol is added until the mixture has turned from red to pale-yellow. A solution of 294 mg (1.0 mmol) of disodium tetrachloropalladate(II) in ethanol is poured into the arenetellurolate solution. The mixture is stirred for 4 h. The dark-brown precipitate is collected by filtration, washed with water, ethanol, and diethyl ether, and dried under vacuum. 

---