- Asymmetric ruthenium(II) and osmium(II) complexes with new bidentate polyquinoline ligands. Synthesis and NMR characterization
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A series of Ru(II) and Os(II) tris-chelate complexes with new bidentate 2-pyridylquinoline ligands have been synthesized and fully characterized by EA,1H-NMR and FAB-MS techniques. The new ligands are: L1 = 4-p-methoxyphenyl-6-bromo-2-(2'-pyridyl)quinoline (mphbr-pq) and L2 = 4-p-hydroxyphenyl-6-bromo-2-(2'-pyridyl)-quinoline (hphbr-pq). The complexes studied are: [Ru(bpy)2L1](PF6)2 (C1), [Ru(bpy)2L2](PF6)2 (C2), [Os(bpy)2L1](PF6)2 (C3), [Os(bpy)2L2](PF6)2 (C4) (bpy = 2,2'-bipyridine), [Ru(dmbpy)2L 1](PF6)2 (C5), [Ru(dmbpy) 2L2](PF6)2 (C6), [Os(dmbpy)2L1](PF6)2 (C 7), and [Os(dmbpy)2L2](PF6) 2 (C8) (dmbpy = 4,4'-dimethyl-2,2'-bipyridine). Moreover, new functionalized complexes C9-C12 were obtained by the basecatalyzed direct alkylation of C2, C4, C6, and C8 with 6-bromo-1-hexene. The complete assignment of the 1H-NMR spectra for the two new ligands (L1 and L 2), and their Ru(II) or Os(II) complexes has been accomplished using a combination of one-and two-dimensional NMR techniques. The JH,H values have been determined for the majority of the resonances.
- Mamo, Antonino,Aureliano, Alessandro,Recca, Antonino
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experimental part
p. 1324 - 1339
(2010/08/19)
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- Synthesis and characterization of new substituted terdentate 2,6-Bis(2'-quinolinyl)pyridine and 1,3-Bis(2'-quinolinyl)-benzene ligands for transition metals
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A series of N-N-N terdendate polypyridine type ligands and their N-C-N cyclometalating homologues were synthetized and fully characterized (L1-L12). Complete assignments of the 1H spectra of the various compounds, accompli
- Mamo
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p. 1225 - 1231
(2007/10/03)
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