40957-08-2Relevant articles and documents
SYNTHESIS AND STRUCTURES OF AROMATIC AND HETEROCYCLIC TELLURIUM COMPOUNDS. XXXI. REACTIONS OF ARYLTELLURIUM OXOCHLORIDES
Rivkin, B. B.,Maksimenko, A. A.,Sadekov, I. D.
, p. 1049 - 1055 (2007/10/02)
The reactions of aryltellurium oxochlorides with the lowest aliphatic acid anhydrides lead to diaryltellurium dichlorides, Te, and CO2 through the intermediate formation of diaryltellurium chloride diacylates.Aryltellurium trichlorides and carboxylic acid anhydrides are formed in the reaction with acyl chlorides.The chlorine atom in the tellurium oxochlorides is replaced by a phenyl group on reaction with phenyllithium.The reaction with dimedone in the presence of triethylamine leads to diaryl ditellurides and a product of trimerization of a carbene, viz., a dimedone derivative that is formed in the thermal decomposition of the intermediate ylid.
A Kinetic and Mechanistic Study of the Solvolysis of Aryltellurium Trihalides in Organic Solvents
Adlington, Neil K.,Miller, J. David,Tahir, Tahir A.
, p. 457 - 460 (2007/10/02)
When an aryltellurium trichloride reacts with methanol in a mixed solvent also containing benzene or dioxane the reaction can be followed by monitoring the generation of acid.The first Te-Cl bond cleavage is acid catalysed and is rate determining.It exhibits a small activation enthalpy, but a large and negative activation entropy.The other trihalides have similar activation parameters.The mechanism is believed to involve protonation of a co-ordinated Cl, with dissociative loss of HCl being rate determining.The compounds RTe(O)Cl and RTe(OMe)2 Cl have been isolated as solid products but, since the reactions occurring in solution are reversible, the products in dilute solution may be different from these.Kinetic experiments to study the variation of rate with the solvent composition and the nature of the alcohol are also reported, as are results of reactions in aqueous dioxane.
