Bond oxidatively induced

Bis(aryl)cobalt(II) compounds have been prepared by reaction of R MgX (where R = C6H6 Cl n = 2-4) with Co(PR3)2Cl2.203 They undergo both thermally and oxidatively induced decomposition, with the corresponding biphenyl a product. The reactions of alkyl-cobalt complexes have been reviewed recently, and include thermolysis, photolysis, oxidation, and reduction reactions.25 Homolysis of the Co—C bond is a feature of reactions. 

Organoiron complexes (7) are converted in high yield into ammonium salts (8) these in turn undergo oxidatively induced ligand transfer and cyclization to give azetidinones (9) in moderate yields (Scheme 9). Formation of the trans product (9b) indicates a stereochemical sequence of trans addition to the olefin complex followed by carboxamidation with retention of configuration at the C—Fe bond. 

DNA is a relatively stable polymer. Spontaneous reactions such as deamination of certain bases, hydrolysis of base-sugar A-glycosyl bonds, radiation-induced formation of pyrimidine dimers, and oxidative damage occur at very low rates, yet are important because of cells very low tolerance for changes in genetic material. 

The third mechanism is based on the inference of the different binding modes for quinone species at Qosite from the different binding positions of the two classes of QoSite inhibitors as discussed in previous section. It was proposed by Crofts and Berry (1998) that after transfer of the first electron to Rieske protein at the stigmatellin binding site, the hydrogen bond breaks and the semiquinone flips into the position of the MOA inhibitors before passing the second electron to haem bL. This model predicts high occupancy of a semiquinone under conditions of oxidant-induced reduction, and the failure to observe the radieal by EPR speetroseopy under these conditions needs to be explained (Junemann et al., 1998). 

Also, ( -Cp)2NbH(RC=CR ) reacts with CO to give ( / -Cp)2Nb(CO)[C(R)=CHR ], alkyne insertion into the Nb—H bond being induced by CO without its insertion. Metalation of the diphenyl(o-vinylphenyl)phosphine ligand in a Ru complex leads to exchange with CO without alteration of the oxidation state ... 

Bauerle and co-workers have synthesized a macrocycle consisting of 8 thiophenes in conjugation by an oxidatively induced elimination of platinum complexes <03CC948>. The platinum complexes 55 were obtained by reaction of terthiophene with terminal acetylenic groups with cw-Pt(dppp)Cl2 in the presence of Cul and EtsN. C-C bond formation was effected by oxidatively induced elimination using iodine and the diacetylene bridged thiophene macrocycle 56 was converted to an all thiophene macrocycle 57 by reacting with sodium sulfide. 

A mixture of PtCl4 and metallic Pt with oxygen in aqueous media can be used to oxidize ethane, propane, ethers, and esters. This combination acts sequentially, whereby the initial cleavage of an unactivated C-H bond is induced by reaction with PtCl4 . The subsequent oxidation step with oxygen is catalyzed by the metallic Pt. For ethane this sequence of... 

C. Oxidative addition of anions to double bonds Anodically Induced Cycloadditions References... 

Daub, G. William, Oxidatively Induced Cleavage of Transition Metal-Carbon Bonds. 22 375... 

One-electron oxidation of [Pd (R)2(dmpe)] (R = Me or CH2SiMe3) in MeCN results in homolytic cleavage of the Pd—C bond with formation of alkyl radicals and [Pd (R)(dmpe)(NCMe)]" (118). The radical intermediate [Pd (R)2 (dmpe)] was not observed. The homolytic bond splitting of the Pd —R bond to yield Pd(II) and R radicals represents an oxidatively induced reductive elimination. 

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