om000892b_si_001.cif (27.02 kB)

Structure and Spectroelectrochemistry (UV/Vis, IR, EPR) of the Acceptor-Bridged Heterodinuclear Complex [(η5-C5Me5)ClRh(μ-bptz)Re(CO)3Cl](PF6), bptz = 3,6-Bis(2-pyridyl)-1,2,4,5-tetrazine

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posted on 09.03.2001, 00:00 by Thomas Scheiring, Jan Fiedler, Wolfgang Kaim
The title complex contains two organometallic reaction centers which are known to engage in hydride transfer catalysis (Rh) or in CO2 activation (Re), each after reductive elimination of the respective chloride ligand. The bridged heterodinuclear compound has been structurally characterized in the form where the chloride ligands are in cis-configuration relative to the bptz plane. The complex was subjected to cyclic voltammetry and spectroelectrochemical reduction to reveal an electrochemically reversible one-electron uptake by the bptz bridge, a rhodium chloride-dissociative second reduction to yield neutral [(η5-C5Me5)Rh(μ-bptz)Re(CO)3Cl], and a quasi-reversible third one-electron reduction.