Di-[1,10]-phenanthrolinyl diazines: a new family of bis-tridentate chelators

A series of three bis-tridentate bridging ligands has been prepared in which two 1,10-phenanthroline units have been symmetrically appended to a central pyridazine, pyrimidine, or pyrazine ring. These ligands have been treated with Ru(tpy-d(11))Cl(3)] to afford both mono- and bimetallic complexes that show very self-consistent NMR properties. structure: see text]