Nickel compounds electron spectroscopy

DEPT13CNMR (Sect. 16.13) In NMR spectroscopy, a technique that utilizes two rf radiation emitters and provides information regarding the number of protons attached to each carbon atom in a compound, deshielded (Sect. 16.1) In NMR spectroscopy, protons or carbon atoms whose surrounding electron density is poor, desulfurization (Sect. 20.8) The conversion of a thioacetal into an a lka ne in the presence of Raney nickel. 

Recently, a spin-orbit split structure was observed in the case of cerium for the peak near Ep by Patthey et al. (1985) which can be interpreted with a modified G-S model which includes spin-orbit effects. Inclusion of spin-orbit splitting in the screening model can also explain this spectrum (Norman 1986). Recently, a two-peak structure has been resolved in uranium compounds by Arko (1986). The data also seems to be consistent with a screening model interpretation. Finally, we need to emphasize that although the two-peak structure seen in all of these cases is considered to be an exotic effect, such structure is also seen in the case of nickel, where the peak away from Ep is actually a satellite below the nickel d-band. And, of course, this multiple peak structure is seen in core level spectroscopy all over the periodic table. As we shall see, the observation of such structure in the valence emission of f-electron compounds is merely a reflection of the localization of such electrons as compared to the other valence electrons. 

The synthesis and X-ray ciystal structure of the nickel(O) alkyne compound [Ni(bipy)(Ti2-PhCCSiMes)] has been leported i. Comparison of spectroscopic and structural data for a series of mono-alkyne complexes indicated that NMR and IR spectroscopies are better suited to characterise the nature of the complexed alkyne (two- or four-electron donor) than X-ray structure analysis. 

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