Electronic configurations rearrangements

Molten salts are characterized by the formation of discrete complex ions that are subjected to coordination phenomenon. Such complex ions have specific compositions that are related to the rearrangement of their electronic configuration and to the formation of partially covalent bonds. The life time of the coordinated ions is longer than the contact period of the individual ions [293]. 

The diagram shows the electron configuration of a normal carbon atom and the rearrangement of electrons to form four new identical orbits in a hybridized carbon atom. This type of hybrid orbital... 

The classical view was that a-bonds between transition metals and carbon were generally weak, and that this weakness was connected with the possibility of electronic rearrangement during a bond mpture process Most recent authors have preferred the view that this is not so, but that such bonds are frequently labile for mechanistic reasons Some recent attempts have been made to relate bond lability to electronic configuration at the metal, but these are open to criticism, and it is time to attempt a more coherent treatment. 

For each type of ligand the rate dependence on metal ion is shown in Table 8 and the following observations can be made. For metal ions with a d° or d10 electronic configuration the rate of rearrangement increases with metal ionic radius as shown in series 15 in which ionic radii are in parentheses ... 

Sigmatropic rearrangements usually involve a bonds adjacent to a n system or a a bond included in a strained system. As other transition metals, but with specific properties due to its d10 electronic configuration,/orbitals and a relativistic effect,1 silver easily interacts with such systems. Silver salts have thus been explored as catalysts to facilitate and promote sigmatropic rearrangements. 

Coupled-rearrangement-channel variational method Kino, Kamimura and Kudo [8] developed a variational method employing three types of coupling schemes among p, e and He2+, which also combined the molecular base and the electronic configurations. Their calculational precision is as high as Korobov s. 

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