Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Diorganyl ditellurides

Actually, the method of choice for the preparation of organyl tellurolate anions is the reduction of diorganyl ditellurides with reducing agents. [Pg.26]

From diorganyl ditellurides or arenetellurenyl halides and organometallic reagents... [Pg.31]

A different approach to unsymmetrical diorganyl tellurides, in which an electrophilic tellurium species is used, involves the nucleophilic attack of organomagnesium or organo-lithium reagents to diorganyl ditellurides. [Pg.31]

Three main routes have been well established for the preparation of diorganyl ditellurides (1) The reaction of sodium ditelluride with alkylating or arylating agents. [Pg.37]

This is the most direct route to diorganyl ditellurides and therefore parallels the ronte leading to diorganyl tellnrides, snbstitnting sodium telluride for sodium ditelluride. Sodium ditelluride is prepared employing, with the appropriate ratio of the elements, methods analogous to those described for sodium telluride. [Pg.37]

The Grignard route to diorganyl ditellurides suffers from lack of generality and the mechanism of the oxidation seems to be uncertain. Alkylmagnesium halides demonstrate lack of reactivity towards elemental tellurium/ whereas aryhnagnesium halides in ether as the solvent furnish a mixture of ditellurides and tellurides. Satisfactory results are obtained by tellurium insertion in aryhnagnesium halides in THF followed by oxidation before or after aqueous work-up. ... [Pg.40]

The reduction of organyltellurium trichlorides, which are the primary products of several reactions involving tellurium tetrachloride (see Section 3.5.1), is a useful and general method for the preparation of diorganyl ditellurides. [Pg.42]

Like chlorinolysis, the brominolysis and iodinolysis of diorganyl ditellurides offer a facile route to tellurium tribromides and triiodides. ... [Pg.51]

An additional protocol involves the reaction of vinyl boranes with diorganyl ditellurides. [Pg.94]

One convenient method for the preparation of organyl teUurolates is the treatment of diorganyl ditellurides with NaBIl,. [Pg.4807]

Tellnrolates can also be produced by reducing diorganyl ditelluride with sodium or lithium tetrahydridoborate ... [Pg.4814]

The reaction can be performed in different organic solvents. Currently ethanol seems to be the most common solvent. This method has been employed almost exclusively for the preparation of sodium alkyl-, alkenyl-, aryl-, and heteroaryl tellnrolates. Metallic lithium and sodium can also be used for the reduction of diorganyl ditellurides. [Pg.4814]

See other pages where Diorganyl ditellurides is mentioned: [Pg.9]    [Pg.10]    [Pg.10]    [Pg.37]    [Pg.37]    [Pg.39]    [Pg.41]    [Pg.43]    [Pg.51]    [Pg.49]    [Pg.4809]    [Pg.4814]    [Pg.4817]    [Pg.9]    [Pg.10]    [Pg.10]    [Pg.37]    [Pg.37]    [Pg.39]    [Pg.41]    [Pg.43]    [Pg.51]    [Pg.4807]    [Pg.4808]   
See also in sourсe #XX -- [ Pg.10 , Pg.37 ]

See also in sourсe #XX -- [ Pg.10 , Pg.37 ]



SEARCH



By chlorinolysis of diorganyl ditellurides

Diorganyls

Ditelluride

Ditellurides

From diorganyl ditellurides or arenetellurenyl halides and organometallic reagents

© 2024 chempedia.info