Bis 4-acetylphenyl

The ease with which the Te — Te bond in ditellurium compounds is cleaved drastically limits the reactions for the modification of functional groups that are already present in the organic part of the molecules. The conversion of bis[2-carboxyphenyl] ditellurium to bis[chlorocarbonylphenyl] ditellurium by butyl dichloromethyl ether in the presence of anhydrous zinc chloride the acid hydrolysis of the ethylene acetals of bis[4-acetylphenyl] and bis[2-acetylphenyl] ditellurium to the bis[acetylphenyl] ditellurium derivatives, the saponification of bis[co-methoxycarbonylalkyl] ditelluriums to the corresponding bis[m-carboxyalkyl] ditelluriumand the oxidation of bis[2-formylphenyl] ditellurium by silver nitrate to bis[2-carboxyphenyl] ditellurium are the modifications of the organic moieties in diorgano ditellurium compounds that have been carried out successfully. 

As mentioned earlier, an electrode reaction implies some orientation effect because a substrate molecule must be fairly close to the electrode surface. The following pairs of cis and trans isomers were reported to exhibit identical reduction potentials l,2-dimethyl-l,2-diphenylethylenes (Weinberg and Wienberg 1968) l,2-bis(4-cyanophenyl)-l,2-bis(4-methoxyphenyl) ethylenes (Leigh and Arnold 1981) and l,2-bis(4-acetylphenyl)-l,2-diphenylethylenes (Wolf et al. 1996). 

Bis[4-acetylphenyl] Ditellurium [Grignard Method] 1 The Grignard reagent is prepared from 4.09 g (0.0165 mol) of the 1,2-dihydroxycthane acetal of 4-acetylbromobenzene in 50 ml of tetrahydrofuran and the solution cooled to 0°. 3.15 g (0.025 mol) of powdered tellurium are added and the mixture is stirred in the flask, which is open to the atmosphere, for 10-15 h. 4 Molar aqueous hydrochloric acid is added to pH 2.5 and the ditcllurium compound is extracted with three 50 ml portions of diethyl ether. The combined extracts arc filtered, dried with sodium sulfate, the solvent is evaporated, and the residue is recryslallized from diethyl ether yield 0.36 g (9%, based on bromoacetal) m.p. 104-106°. 

Poly[9,9 -bis(4-acetylphenyl)-fluorene-co-4,4 -diamino-3,3 -dibenzoyldiphenyl ether] 1,1,2,2-terachloroethane 2 422... 

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