Octahedral crystal field energy level diagram

The crystal field energy level diagram for octahedral coordination complexes. The energies of the d orbitals differ because of differing amounts of electron-electron repulsion. The... 

For each of the following metals, write the electronic configuration of the atom and its 2+ ion (a) Mn, (b) Ru, (c) Rh. Draw the crystal-field energy-level diagram for the d orbitals of an octahedral complex, and show the placement of the d electrons for each 2+ km, assuming a strong-field complex. How many impaired electrons are there in each case ... 

The breadth of the band near 10,100 cm-1 in the a and y spectra of grunerite and the shoulder at 8,500 cm-1 are attributed to absorption by Fe2+ ions in the Ml, M2 and M3 positions. Assuming a lower-level splitting of 500 cm-1 for the t2g orbitals of Fe2+ ions located in these relatively undistorted octahedral sites, an energy level diagram similar to that for the orthopyroxene Ml site (fig. 5.16) may be constructed leading to the approximate crystal field parameters... 

Figure 22.9 Energy Level diagram for a ion in an octahedral crystal field.

Figure 5.6 Energy level diagram of the splitting of the J-orbitals of a transition metal ion as a result of (a) octahedral co-ordination and (b) tetrahedral coordination, according to the crystal field theory. (From Cotton and Wilkinson, 1976 Figure 23-4. Copyright 1976 John Wiley Sons, Inc. Reprinted by permission of the publisher.)...

Table 2. Energy-level diagram for C -3+ in an octahedral crystal field (L—S coupling not included) for the special choices and 30 (lowest doublet-levels only observed...

Figure 29.2 (a) Octahedral and (b) tetrahedral crystal fields represented as point charges around a central ion. Arrows show the effect of a tetrahedral distortion to the crystal field, (c) d-Orbital energy level diagrams for octahedral crystal field and octahedral crystal field with tetragonal distortion, and (d) tetrahedral crystal field and tetrahedral crystal field with tetragonal distortion. 

Figure 7.2. Energy-level diagram of the splitting of the five d orhitals in crystal fields of Td and octahedral Oh symmetry.

Energy level diagram for a octahedral complex, ignoring second-order crystal field interaction. 

The energy level diagram for Ti3+ in fig. 3.4 shows the manner by which the 2D spectroscopic term is resolved into two different levels, or crystal field states, when the cation is situated in an octahedral crystal field produced by surrounding ligands. In a similar manner the spectroscopic terms for each 3d" configuration become separated into one or more crystal field states when the transition metal ion is located in a coordination site in a crystal structure. The extent to which each spectroscopic term is split into crystal field states can be obtained by semi-empirical calculations based on the interelectronic repulsion Racah B and C parameters derived from atomic spectra (Lever, 1984, p. 126). 

Figure 3.7 Simplified energy level diagram for 3d6 ions (e.g., Fe2+ and Co3+) in an octahedral crystal field. The diagram shows that in a high intensity field the 1Alg crystal field state, corresponding to the low-spin configuration (t2gf, becomes the ground state.

Figure 3.8 Tanabe-Sugano energy level diagram for a 3d6 ion in an octahedral crystal field. Note that some of the highest energy triplet and singlet crystal field states listed in table 3.3 are not shown in the diagram.

Figure 3.10 Partial energy level diagram for the Fe3+ or Mn2+ ions with 3tfi configurations in high-spin states in an octahedral crystal field. Only sextet and quartet spectroscopic terms and crystal field states are shown. Note that the same energy level diagram applies to the cations in tetrahedral crystal fields (with g subscripts omitted from the state symbols for the acentric coordination site).

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