Crystal-field theory electron configurations

Pd(I) ion has a 4d9 electronic configuration. Consequently, this ion behaves in a tetragonal field in the same manner as Cu(II) ion. The g values calculated from the crystal field theory (12) are ... 

For example, [MoC+,]3 has a total of thirty-nine valence electrons from the molybdenum 4d5 5s and six chlorine 3p5 configurations, and the —3 charge on the ion. Its electron configuration is therefore cr12 n24 (2/2 )3. Thus the MO theory of these ML6 complex ions confirms that the electrons of prime importance are those occupying the t2g and eg levels on the metal, as predicted by crystal-field theory. However, the MO theory points the way to the more accurate calculation of electronic structure and properties. 

A mass-spectral study performed on Sc(acac)3, Sc(dpm)3 and La(dpm)3 vapors shows that, due to volatility and thermal stability, this group of S-drketonates is suitable for low-temperature gas-phase transport of metals. The similarity of the mass spectra of Sc, Y and La -diketonates may point to a similarity of the processes involved in the thermal destruction of the molecular species present in vapor. Within the framework of crystal field theory, an unpaired electron of a central metal ion (Sc +, Y + or La + with the nrf configuration) occupies a orbital, which has the lowest energy in D2h symmetry. This results in stabilization of the ML2 radical and enhances the thermal stability of the complex. 

Use crystal field theory to interpret the magnetic properties of coordination compounds in terms of the electron configurations of their central ions (Section 8.4, Problems 21-25). 

Values of the crystal field splitting parameters A or QDq are listed in Table 8. These give a good idea of relative strengths of ion-water interactions they are available from solution transmission spectra and from diffuse reflectance spectra for solids containing [M(OH2) J" complex cations. The greater interaction with than with and with second-row M " than with first-row as well as the dependence on d electron configuration and spin all accord satisfactorily with crystal field theory. 

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