Abp. Lever et al., ELECTROCHEMISTRY AND SPECTROELECTROCHEMISTRY OF CHLORO(PHTHALOCYANINATO)RHODIUM(III) SPECIES IN SOLUTION-PHASE, Inorganic chemistry, 35(3), 1996, pp. 725-734
The electrochemistry and spectroelectrochemistry of mononuclear chloro
(phthalocyaninato)rhodium(III), ClRhIII-Pc, has been studied in the so
lution phase, at ambient and low temperature. Reduction leads to a rho
dium(II) species, ClRh(II)Pc which is stable at low temperature, with
reversible electrochemistry, but at ambient temperature dimerizes gene
rating a rhodium-rhodium-bonded dinuclear species. This dinuclear spec
ies is oxidized at a much more positive potential than the mononuclear
species. The complex electrochemical behavior of these species is sho
wn to be due to the presence of three different dinuclear Rh-II specie
s with zero, one, or two axially bound chloride ions whose detailed el
ectrochemical properties are explored. Reduction of the dinuclear Rh(I
I)Pc species leads to a reversibly generated anion radical species.