Nickel self-exchange

Self-Exchange Rate Constants fob Nickel(III)/(II) Complex... 

The nature of the self-exchange is still under consideration. The planned use of the copper(III)-nickel(II) and (reverse) reactions to... 

The Marcus analysis of the rate constants for electron transfer reactions of the [Ni((-)-(R)-Me[9]aneN3)2] couple with nickel and cobalt complexes yields a self-exchange rate constant of 1.2 x 10" The oxidations of... 

A self-exchange rate constant of 48 s was determined for nickel... 

Oxidations of a number of cobalt and nickel macrocyclic complexes, and others, by [Co(H20)6] have been examined and though Marcus correlations are good, the evaluated self-exchange rate, s , is... 

Cross reactions of nickel(III)- and nickel(II)-peptide complexes conform readily to Marcus theory and are thought to be outer sphere but, in contrast to the copper system, give no unique self-exchange rate. Instead values range from 550 s for [Ni(III)/(II)(H 2Aib3)] through 1.3 x... 

The non-relativistic DV-Xa calculation [21] was performed with the Slater exchange parameter, a = 0.7, for all atoms and with 50,000 DV sampling points, which provided a precision of less than 0.1 eV for valence electron energy eigenvalues. We employed the basis functions of the central nickel atom ls-4p orbitals, while those of the nitrogen and carbon atoms were used ls-2p orbitals. The calculations were carried out self-consistently until the difference in the orbital populations between the initial and final states of the iteration was less... 

Zn(OH)2 is soluble in the alkaline solution as [Zn(OH)3]- until the solution is saturated with K[Zn(OH)3]. In addition Zn(OH)2 can be dehydrated to ZnO. An enhanced power density (when compared with the - Leclanche cell) is accomplished by using particulate zinc (flakes) soaked with the alkaline electrolyte solution. This anode cannot be used as a cell vessel like in the Leclanche cell. Instead it is mounted in the core of the cell surrounded by the separator the manganese dioxide cathode is pressed on the inside of the nickel-plated steel can used as battery container. In order to limit self-discharge by corrosion of zinc in early cells mercury was added, which coated the zinc effectively and suppressed hydrogen evolution because of the extremely low exchange current density... 

The labeling of furan (Table XII) is similar to thiophene, since the most active of the borohydride-reduced catalysts is iridium. However, self-activated iridium oxide is the most active of all for general deuteration, whereas nickel chloride is the most efficient and selective for the a. position, only slight polymerization being observed. Acid catalysis should be used with caution for exchange labeling, since furan readily polymerizes above 30° in the presence of hydrochloric acid and chlorides. 

Fig. 3. Splitting of atomic energy levels in a scaled magnetic field. The value A = 1 corresponds to the self consistent atomic XC-field. At this value, the exchange splitting of the Ni 3d states ( 0.6 eV) is much larger than the spin-orbit splitting of these states (fti 0.2 eV). Thus, the 3d states in nickel have almost pure spin character (see also Fig. 9 below). On the contrary, the 4p states show a much smaller exchange splitting and thus remain almost pure K-states.

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