ja5b12148_si_003.cif (407.44 kB)
A Stable Coordination Complex of Rh(IV) in an N,O-Donor Environment
dataset
posted on 2015-12-23, 00:00 authored by Shashi
B. Sinha, Dimitar Y. Shopov, Liam S. Sharninghausen, David J. Vinyard, Brandon Q. Mercado, Gary W. Brudvig, Robert H. CrabtreeWe
describe facial and meridional isomers of [RhIII(pyalk)3], as well as meridional [RhIV(pyalk)3]+ {pyalk =2-(2-pyridyl)-2-propanoate}, the first coordination
complex in an N,O-donor environment to show a clean, reversible RhIII/IV redox couple and to have a stable Rh(IV) form, which
we characterize by EPR and UV–visible spectroscopy as well
as X-ray crystallography. The unprecedented stability of the Rh(IV)
species is ascribed to the exceptional donor strength of the ligands,
their oxidation resistance, and the meridional coordination geometry.