Transition cation

Hydroxyimino-3-aminoproply (inulin can be synthesized from tMcyanoelhyl (inulin (19) by reaction with hydroxylamine in a neutral medium (Figure 5.7), giving about 80% conversion (Verraest, 1997). The amidoximes can be found in two forms (22, 23), the iyn-hydroxyimino being the most stable. Amidoximes are particularly reactive compounds and will effectively chelate transition cations such as Cu2+ (24). 

Fig. 3.64 plots the difference between film tension and surface tension of the bulk phase, 2o(l-cos0o), as a function of the electrolyte concentration Cei in the initial solution [251], It is obvious that the course of the dependence changes sharply at the CBF/NBF transition. Cationic surfactant also follow a similar trend of behaviour [324],... 

When a metal cation or an anion binds to the surface of a soil colloid, especially oxide particles, it always occurs in competition with proton-binding equilibrium. For transition cations such as Cu(II), Pb(II), and so on, both monodentate binding and bidentate binding have been proposed, that is. 

As already mentioned, one of the principal aims of using perovskite-type oxides as oxidation catalysts is to avoid the use of expensive and low thermally stable noble-metal-supported catalysts (e.g., Pt/Al203). Thus, by modifying the perovskite composition using alkaline earth metal or metal transition cations (A- and/ or B-substituted materials) and by improving their textural and defective properties during the synthesis process, it is possible to obtain perovskite-based catalysts as active as noble-metal-supported ones for the low-temperature CO oxidation reaction. Nevertheless, some authors have recently claimed the... 

Table 6. Experimental (in acetonitrile) and theoretical (calculated by ZINDO method) maxima in the absorption spectra of 9-azidoacridine A3 and its hydrochloride A3HC1 absorption band maximum (X) and the corresponding vertical excitation energy E, the logarithmic molar absorption coefficient s, cm ), the oscillator strength (/), and the structure of transition (cation was calculated without a counterion) [50] ...

Auto-reduction processes in the absence of hydrogen can occur during thermal treatments in vacuum or inert atmospheres. In the case of first-row transition cations,reduction stops at low-valent states. Thus, Fe " [106] or Cu +Y [107] zeolites heated under vacuum were reduced to the Fe + and Cu+ forms, respectively. Platinum-group cations can be reduced to metals by heating in the presence of extra-framework species. Thus, Pd + ions in Y zeolite were reduced to metal particles by heating at 773 K in the presence of water molecules [108] since oxygen was formed, the reaction probably proceeded according to the overall reaction ... 

---