Synthesis, Characterization, and Intervalence Charge Transfer Properties of a Series of Rhenium(I)−Iron(III) Mixed-Valence Compounds

Abstract

A series of cyanide-bridged mixed-valence compounds of the form {[dmbReI(CO)3]n-FeIII(CN)6}3-n were synthesized, and their MM‘CT absorptions were modeled using Marcus−Hush theory. The hypsochromic shift of the MM‘CT bands with increasing n is due to the increase in the redox potential of the Fe(III) center as more Re(I) species are bridged to it. The single-crystal X-ray structure of the 3:1 (Re/Fe) species was also determined, and a solvent dependence was performed.