Cations molybdenum

Molybdenum Cation exchange adsorption Molybdenum Cation exchange adsorption on Chelex-100... 

Allows a better dispersion of molybdenum trioxide from the external surface of the mesoporous support into its internal nanochannels. The active sites (possibly pairs of neighboring molybdenum cations) thus increases. As the result of better dispersion, the reduced molybdenum oxide species formed during the course of reaction through its entire surfaces and thus lowers the possibility of sintering in a reduced environment. Here, we see that the deactivation rate is the highest in Mo/Si02 catalyst due to the lowest surface area. 

The monohomotropylium molybdenum cation [C8H9Mo(CO)3]+ is formed on protonation of the cyclooctatetraene carbonyl C8H8Alo(CO)3 (247). An W-methylisoquinolinium chromium tricarbonyl cation is described by Ofele (210). 

Considering that one electron corresponds to the reduction of Cu to Cu, the reduction of six Mo species to six Mo can be attributed to one copper ion. The reduction proceeds in the vicinity of the copper cations via a concerted mechanism between the copper and one molybdenum cation of each of the six surrounding Keggin anions, the Cu cations thus catalyzing the reduction of molybdenum cations ... 

Controlled polyfunctionalization of cycloheptene can be achieved via nucleophilic addition and subsequent decomplexation of cyclo-heptadiene molybdenum cationic complexes (Scheme 16). ... 

The shapes of the absorptions arising from Class II and Class III mixed-valence ions are very different as is seen in the section of the terephthalate-bridged cations of the Mo and Wj linked complexes shown in Figure 6.9 [42]. The singly oxidized linked ion shows a very low energy relatively sharp but asymmetric absorption typical of a Class III ion close to the Class II/III border, while the related molybdenum cation has a much higher energy broad absorption typictil of a Class II ion. 

The complexation of cobalt-60 radiation-crosslinked POE and of linear POE with molybdenum-VI salts indicated that, in the linear form, complexation is extremely weak and of low stability—40 to 80 times weaker than that with sodium salts (134). This was related to vacant d-orbitals in molybdenum being involved in the interaction process. This resulted in greater polarizability of the cations and steric restriction in coordination with the ether oxygen atoms of the polymer chains. However, when the salts were complexed with the crosslinked POE, stability constants two orders of magnitude higher than those obtained with linear POE were found. This was interpreted as being related to intermolecular rather than intramolecular complexation. Stoichiometry for the crosslinked POE system was 4.5 ethylene oxide units per molybdenum cation. 

The bis- r-benzene molybdenum cation is thought to disproportionate by the reaction,... 

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