Isomer shift correlation diagram

Fig. 8.26 (Left) Isomer-shift correlation diagram for a systematic series of [(Me3cyclam-acetate) FcOO]"" complexes, whereX is an azide (Na ) or a nitrido (=N) group. (Right) Orbital scheme of [(Me3cyclam-acetate)Fe =N] ...

FIGURE 3. Oxidation state/spin quantum state-isomer shift correlation diagram for iron in a variety of compounds. The values of S are referred to the a-Fe standard. (Adapted from Figure 3.2 in Ref. 2b.)... 

A typical example of a correlation diagram for Fe is given in Fig. 4.3. It summarizes the isomer shifts for a great variety of iron complexes with oxidation states (1) to (VI) in the order of the respective high-spin, intermediate-spin, and low-spin configurations. The plot of the corresponding values marked by grey, hatched and open bars demonstrates three major trends ... 

A correlation of isomer shift, electronic configuration, and calculated -electron densities for a number of ruthenium complexes in analogy to the Walker-Wertheim-Jaccarino diagram for iron compounds has been reported by Clausen et al. [ 127]. Also useful is the correlation between isomer shift and electronegativity as communicated by Clausen et al. [128] for ruthenium trihalides where the isomer shift appears to increase with increasing Mulliken electronegativity. 

The chemical isomer shift of Sn has been measured over the entire range of composition of tin with the six metals Cd, In, Sb, Tl, Pb, and Bi [230]. Considerable correlation with the known phase diagrams of the binary alloys was found and in the cases of In, TI, and Pb, large changes in chemical isomer shift were recorded in the vicinity of phase boundaries. 

Fig. 2.15. Correlation diagrams (partial quadrupole splitting against partial isomer shift) for (a) iridium(III), and (b) ruthenium(II).

Fig. 2.16. Correlation diagram for low spin iron(II). Note that the partial isomer shift axis is reversed.

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