Elektronische und Resonanz-Raman-Spektren der Chloro-Bromo-Ruthenate(IV), [RuCl_nBr_6-n]^2-, n = 0 ... 6

Abstract

The vibrational and electronic resonance Raman spectra of the solid tetraalkylammonium salts of [RuCl

Preparation and Spectroscopic Investigations of Mixed Octahedral Complexes and Clusters

“…The minor differences of the electronegativities between the heavier halides, Cl, Br, and I, make the assignments of LMCT transitions to the respective ligands in mixed coordination spheres impossible. Nevertheless, for the sake of an overall spectroscopic characterization, the spectra have been measured in solution and at low temperature in solid state for the following series: [ReCl n Br 6 - n ] 2- , [ReCl n I 6 - n ] 2- , [OsCl n Br 6 - n ] 2- , [IrCl n Br 6 - n ] 2- , [OsCl n I 6 - n ] 2- , and [RuCl n Br 6 - n ] 2- …”

“…This allows the assignment of the very weak 0−0 transitions by the symmetrical appearance of vibrational bands at higher and lower frequencies. In the same manner, the intraconfigurational transitions of the individual species within the series, [OsF n Cl 6 - n ] - , [OsCl n Br 6 - n ] 2- , [IrF n Cl 6 - n ] 2- , [IrF n Cl 6 - n ] - , and [RuCl n Br 6 - n ] 2- , have been measured and assigned.…”