Abstract
A series of salts of the type cis-[RuII(bpy‘)(bpy‘ ‘)(CO)2](PF6)2 (bpy‘ and bpy‘ ‘ represent different bipyridine derivatives) have been prepared by using literature procedures and utilized as precursors for the preparation of highly functionalized complexes of RuII incorporating neutral and anionic, mono- and bidentate, nitrogen-, phosphorus-, sulfur-, and oxygen-donor ligands. The new synthetic approach builds upon previous work with the trimethylamine N-oxide-assisted removal of the carbonyl ligand. Difficulties with the use of this potent oxidant in the presence of reducing ligands such as dppe and nitrite have been overcome by the use of acetonitrile complexes of the type cis-[Ru(bpy‘)(bpy‘ ‘)(CH3CN)2]2+ and pyridine complexes of the type cis-[Ru(bpy‘)(bpy‘ ‘)(py)2]2+ as highly versatile intermediates. Strategies for the selective removal of a single carbonyl ligand from the precursors have been developed and used to synthesize the highly asymmetrical complexes cis-[RuII(bpy‘)(bpy‘ ‘)(py)(CO)]2+ and ...
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