Spectroelectrochemical studies of hexachlorometallates. Optical charge transfer spectra of [MCl6]1− anions
摘要:
Thin layer spectroelectrochemical techniques have been employed to show that the MCl62- anions (M = Re, Os, Ir and Ru) undergo a reversible one-electron oxidation in methylene chloride to the corresponding pentavalent complex at low temperatures. In the case of Ir and Ru this affords the first opportunity to examine the optical charge transfer spectrum of these highly oxidised complexes, whilst for Re and Os high quality spectral data are presented. A comparison of the ligand to metal charge transfer spectra of the electrochemically generated pentavalent complexes with their more familiar isoelectronic hexavalent analogues is presented.