Simultaneous Pair Electronic Excitations in a Binuclear Iron
(III) Complex
Harvey J. Schugar Department of Chemistry
Rutgers University
New Brunswick, New Jersey
George R.
Rossman, Jack Thibeault, Harry B. Gray
Arthur Amos Noyes Laboratory of Chemical Physics
California Institute of Technology
Pasadena, CA 91125
Abstract
The spectrum of th ethylenediammonium salt of the dimeric Fe(III) comples ion [(HEDTAFe)2O]2- was examined. The ultravloIet absorption spectrum
of this isolated metal complex containing the bridging unit Fe(lII)···O···Fe(III) slows several bands due to the simultaneol!s
electronic excitation of the two Fe(III) centers. The band positiors are in excelient agreement with calculated
sums of one-center d-d transitions.
The magnetic moment vs
temperature of the ferric picolinate hydroxy dimer