Electronic spectroscopy complex

Launay, G. and Wojtkowiak, B. (1976) Study of molecular interactions by electronic spectroscopy. Complexation by charge transfer of diazines in the presence of iodine. Bull. Soc. Chim. Fr, 53-56. 

Daniel C (2004) Electronic Spectroscopy and Photoreactivity of Transition Metal Complexes Quantum Chemistry and Wave Packet Dynamics. 241 119-165... 

The foregoing discussion applies to complexes that are weak-field cases. Spectral analysis for strong-field cases is somewhat different and will not be discussed here. For complete analysis of the spectra of strong-field complexes, see the book by A. B. P. Lever, Inorganic Electronic Spectroscopy, listed in the references at the end of this chapter. 

Lever, A. B. P. (1984). Inorganic Electronic Spectroscopy, 2nd ed. Elsevier, New York. A monograph that treats all aspects of absorption spectra of complexes at a high level. This is perhaps the most through treatment available in a single volume. Highly recommended. 

Previously, Ermakov et al. —2— studied Pt-Mo/SiOj catalysts and found that the presence of Mo in Pt-Mo/Si02 catalysts increased the rate of hydrogenolysis by k orders of magnitude compared to Pt/SiOj catalysts and decreased the electron density of Pt as observed from x-ray electron spectroscopy. They interpreted these data in terms of chemical bonding between Pt and Mo and suggested a Pt°-Mo + complex on silica which has catalytic activity and selectivity similar to Rh or Ir rather than to Pt. 

X-ray crystallography shows that in the [Cu2L]3+ state the Cu-Cu distance is short ( 2.4A), and ESR and electronic spectroscopy indicate that the systems are delocalized with both Cu centers in the 1.5 oxidation state. One-electron reduction of both [C L1]3 and [Cu2L2]3+ leads to the corresponding [Cu2L]2+ complexes without any drastic perturbation to the coordination environments at the metal centers. In the case of [C L1]3, reduction causes the Cu-Cu distance to increase by 0.09 A, but for [Cu2L2]3+ the increase is much larger (0.51 A). 

Electronic spectroscopy has been employed to study substitution reactions of sulfoxide complexes. An interesting example (104) is the reaction of [Fe(0-Me2S0) P+ with chloride ion. Addition of one equivalent of chloride ion to a Me2SO solution of [Fe(0-Me2S0)6P+ causes a change in spectrum, but further additions have no effect. Comparisons with known compounds indicate that [Fe(0-Me2S0)5Cip+ is the major species in solution. 

Boyle EA(1981) Cadmium, zinc, copper, and barium in foraminifera tests. Earth Planet Sci Lett 53 11-35 Brugger J, McPhail DC, Black J, Spiccia L (2001) Complexation of metal ions in brines application of electronic spectroscopy in the study of the Cu(II)-LiCl-H20 system between 25 and 90°C. Geochim Cosmochim Acta 65 2691-2708... 

The electronic spectroscopy of high-spln Fe(III) complexes Is dominated by the presence of charge transfer bands. 

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