Organotelluriums

H. J. Gyshng, The Synthesis of Organotellurium Tigands, Kodak Laboratory Chemical Bulletin, Vol. 53, No. 1, Eastman Kodak Co., Rochester, N.Y., 1982. 

BIARVLS FROM SIMPLE ARENES via ORGANOTELLURIUM INTERMEDIATES 4,4-DIMETHOXY-l.I -BIPHENYL... 

These facts, together with many other examples of the peculiar chemical behavior of organotellurium compounds (95UK527), emphasize their specific reactivity and explain why a number of methods developed for preparation of organosulfur and organoselenium compounds are inapplicable for their tellurium analogues. 

ORGANOLITHIUM COMPOUNDS, addition to allyl alcohols, 55,1 Organoselenium reagents, 59, 141 ORGANOTELLURIUM INTER-... 

Various classes of organotellurium compounds in aprotic solvents have been studied as to their electrochemistry, whereas more limited are the reports on the electrochemistry of tellurium and its inorganic compounds in non-aqueous solvents [54, 55]. 

Complexes of Chalcogen Donors with Organotellurium Electrophiles 854... 

A similar approach has been used to stabilize the organotellurenyl azide 2-Me2NCH2C6H4TeN3.187 Organotellurium(II) azides with extremely bulky alkyl or aryl groups attached to Te have also been structurally characterized.187... 

Organotellurium(IV) azides with two or three azido groups attached to tellurium, R2Te(N3)2 (R=alkyl, Ph, C6F5) and RTe(N3)3 (R=alkyl, 2,4,6-Me3C6H2), are prepared by the reaction of organotellurium(IV) fluorides with trimethylsilyl azide.188... 

Organotellurium(II) derivatives, ArTeS2P(OR)2 (Ar = 4-MeOC6H4 or 4-EtOC6H4, R = Me or Et Ar = mesityl, R = Pr7) are supramolecular chain-like compounds, self-assembled through Te- S secondary bonds and bridging... 

K. Irgolic, Organotellurium Compounds, D. Klamann (ed), Thieme, Hamburg, 1990. 

One- and two-electron oxidations and reductions of organoselenium and organotellurium compounds, 39, 79... 

Several new types of Ge-O-bonded species have appeared and some new methods for the formation of such bonds have been described. Germoxanes can be obtained via reaction of triorganobromogermanes with oxygen in the presence of organotellurium compounds (Equation (127)).164 The germapropadiene 4 reacts with alcohols to provide alkoxides 70 (Equation (128)) or benzaldehyde to yield a 1,2-oxagermetane 71 via a [2 + 2]-addition (Equation (129)), which exhibits unusual thermal stability for an unencumbered oxagermetane.16... 

Oxidation of thiols and related compounds with organoselenium(IV) and organotellurium(rV) compounds 102 Other oxidations with selenoxides and telluroxides 106 Thiolperoxidase and haloperoxidase-like activity of organoselenides and organotellurides 108... 

Organotellurium(II) compounds can also contain a three-center, four-electron bond as shown for 39 to 42 in Fig. 19. Typically, these molecules contain an odd number ligands around the central atom and an electronegative atom helps to stabilize a tellurenyl halide or selenenyl halide bond through chelation to form a four, five, or six membered ring. " Such molecules are described as lO-Te-3 and lO-Se-3... 

OXIDATION OF THIOLS AND RELATED COMPOUNDS WITH ORGANOSELENIUM(IV) AND ORGANOTELLURIUM(IV) COMPOUNDS... 

Table 6 Electrochemical reduction of organotellurium(IV) compounds and their corresponding organotellurium (II) compounds hy cyclic voltammetry and coulometry...

One-electron oxidation of organoselenium and organotellurium compounds results in initial formation of a radical cation (equations (19) and (20)). The eventual fate of the radical cation depends on several variables, but is typically a Se(lV) or Te(lV) compound. The scope of this section will be the one-electron oxidation of selenides and tellurides that are not contained in a heteroaromatic compound, and ones in which the Se and Te are bonded to two carbons, rather than to other heteroatoms. Tellurium- and selenium-containing electron donor molecules have been reviewed. 

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