Crystal field stabilization energy octahedral complexes

TABLE 8.5 Electron Configurations and Crystal Field Stabilization Energies for High- and Low-Spin Octahedral Complexes... 

Crystal field stabilization energy high- and low-spin octahedral complexes... 

Table 20.3 Octahedral crystal field stabilization energies (CFSE) for d configurations pairing energy, P, terms are included where appropriate (see text). High- and low-spin octahedral complexes are shown only where the distinction is appropriate.

Table 2.1 Crystal field stabilization energies for metal ions in octahedral complexes...

Metal Complexes.—In an extensive study of the complexing power of thiazoles, numerous zinc(n), cobalt(n), copper(ii), nickel(ii), andplatinum(n) complexes of the parent compound, and of 4-alkyl- or 2,4-dialkyl-thiazoles, usually of the general type MX2L2, have been prepared. A consideration of their spectral and magnetic properties reveals that the zinc and cobalt complexes are tetrahedral, the 4-methyl copper and nickel complexes are octahedral, and the dialkyl complexes of copper and nickel and the platinum complexes are square planar. The four-co-ordinate dialkyl complexes follow the crystal field stabilization energy predictions as to the relative tendency to form tetrahedral or square-planar forms, i.e. Zn > Co > Cu > Ni. The complexes are invariably metal-nitrogen, and not metal-sulphur, co-ordinated. ... 

Table 13.1 Crystal field stabilization energies for weak field and intermediate field octahedral complexes. Where alternative configurations are given, the fractional values are the weak-field limit and the integer values are the strong-field limit (between them they give the intermediate field range)...

An example of this use of crystal field stabilization energies is the following. Just as a table of stabilization energies for weak field octahedral complexes was obtained above, so one can be obtained for tetrahedral... 

Fig. 13.6 (a) Octahedral crystal field stabilization energies of the tripositive lanthanide ions, (b) Enthalpy data related to the formation of (octahedral) complexes of the ligand shown in Fig. 13.7 (see also the caption to Fig. 13.2). 

The complex is even less reactive, and it is pointed out that the rates parallel the ease of formation of octahedral complexes as predicted by their crystal-field stabilization energies, d >d >d. Yields of the bridged octahedral complexes are fairly low, yields decreasing in the order Crii >... 

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