TY  - JOUR
A1  - Ernst, Sylvia
A1  - Kasack, Volker
A1  - Bessenbacher, Christian
A1  - Kaim, Wolfgang
T1  - Ein- und zweikernige Bis(2,2′-bipyridyl)ruthenium-Komplexe mit N,O-Modelliganden für Dehydrogenase-Cofaktoren
T1  - Mono- and binuclear bis(2,2′-bipyridine)ruthenium complexes with N,O-ligands modelling dehydrogenase cofactors
T2  - Zeitschrift für Naturforschung, B
N2  - Coordination of substitutionally inert [Ru(bpy)2]2+ fragments (bpy: 2,2′-bipyridine) to the a-iminoketone chelate ligands pyrazine-2-dimethylcarboxamide (4) and 4,7-phenanthroline-5,6-dione (5) yields the complexes [(N,O-4)Ru(bpy)2]2⊕, [(O,O′-5⊖)Ru(bpy)2]⊕ and {(N,O; N′,O′-5)[Ru(bpy)2]2}4⊕ which exhibit a rich electrochemistry. The distinctly different electronic structures of the complexes are evident from the ESR behaviour of paramagnetic intermediates: N.O-coordinated complexes have the unpaired electron residing in the ligand n system upon reduction, albeit with g<2 for the binuclear complex of 5. The paramagnetic O,O′-coordinated mononuclear complex with 5 has its redox potentials shifted positively relative to that of the binuclear system. These results are particularly noteworthy because 4 and 5 can be regarded as model compounds for the flavin and methoxatin dehydrogenase cofactors.
KW  - Dehydrogenase Cofactors
KW  - Ruthenium Complexes
KW  - Oxidation States
KW  - ESR Spectra
KW  - α-Iminoketones
Y1  - 2014
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/79983
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-799830
SN  - 1865-7117
SN  - 0932-0776
VL  - 42.1987
IS  - 4
SP  - 425
EP  - 430
PB  - Verlag der Zeitschrift für Naturforschung
CY  - Tübingen
ER  -