Oxidative addition of halogens

Fig. 4 Halotelluronium species stabilized by intramolecular chelation formed by oxidative addition of halogens to A,A-dimethyl-2-(aminomethyl)phenyl phenyltelluride (17).

Table 2 Arrhenius and Eyring activation parameters for the second, Slow reaction observed by stopped-flow spectroscopy in the oxidative addition of halogens to diorgano tellurides 17, 20, and 23-25...

Fig. 7 A summary of oxidative addition of halogens to diorganoselenides and tellurides.

Oxidative addition of halogen to the respective gold(I) complex... 

Other gold(III) complexes containing one gold-carbon bond include the isonitrile complexes [AuX3(CNR)] (131) and the trimeric imino compounds [Au3 C(OR)=NR 3X6] (X = Br or I), which have been prepared (155) by oxidative addition of halogen to the gold(I) species. 

Oxidative addition of halogens to tellurantrene 92 (M = Te) apparently may result in the formation of both dihalogeno-94(M = Te)andtetrahalo-geno derivatives 104. The former compounds are formed upon addition of bromine and iodine to a chloroform solution of tellurantrene at room... 

Oxidative addition of halogens to the 1 2 complexes of bis(diphenyl-phosphino)methane or -propane with gold(I) chloride (11) forms the Au(II) complexes (12) (93). 

The analogous bromo and iodo cations have been prepared by oxidative addition of halogen to bis(triphenylphosphine)osmium tricarbonyl (52). 

Numerous oxidative additions of halogens to cyclic selenium- and tellurium-containing heterocycles have been reported. Treatment of the telluropyranone 66 with iodine affords crystalline tetravalent tellurium species 67 (Equation 24) <19950M1442>. The kinetics of this reaction <19950M1442> and analogous oxidations of 68 and 69 with bromine <19940M3338> have been studied using stopped-flow methods. These results indicate that the oxidative additions occur by stepwise mechanisms. 

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