Ru(bpy)[sub 2][sup 2+] and Os(bpy)[sub 2][sup 2+] complexes of large polyaza cavity-shaped ligands
Journal Article
·
· Inorganic Chemistry; (United States)
- Univ. of Houston, TX (United States)
The Friedlaender condensation of cyclic 1,2-diketones with 2-amino-5,6-dihydro-1,10-phenanthroline-3-carboxaldehyde provides a series of hexaaza cavity-shaped molecules 2a-c. Reaction with Ru(bpy)[sub 2]Cl[sub 2] (where bpy = 2,2[prime]-bipyridine) incorporates Ru(II) into a distal bidentate site. For ligands which are significantly nonplanar, a second Ru(II) or Os(II) nucleus can similarly be incorporated into the remaining distal site. The use of bpy-d[sub 8] as an auxilliary ligand simplifies the NMR spectra of the complexes and permits a detailed conformational analysis which is reinforced by an X-ray determination of the dinuclear complex [(bpy)[sub 2]Ru(2c)Ru(bpy)[sub 2]](PF[sub 6])[sub 4], which crystallizes in the monoclinic space group P2[sub 1]/n with a = 13.535(6) [Angstrom], b = 27.399(8) [Angstrom], c = 22.400(8) [Angstrom], [beta] = 96.72(3)[degrees], [mu] = 5.39 cm[sup [minus]1], and Z = 4. Communication of the metal centers through the bridging ligand is examined by electronic absorption and emission spectroscopy and electrochemical analysis. Evidence is presented for limited communication between the two halves of the bridging ligand controlled by the length of the central polymethylene bridge. 38 refs., 10 figs., 3 tabs.
- OSTI ID:
- 6044694
- Journal Information:
- Inorganic Chemistry; (United States), Journal Name: Inorganic Chemistry; (United States) Vol. 32:9; ISSN 0020-1669; ISSN INOCAJ
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400400 -- Electrochemistry
ABSORPTION
ABSORPTION SPECTROSCOPY
AROMATICS
AZINES
BIPYRIDINES
CATIONS
CHARGED PARTICLES
CHEMISTRY
COMPLEXES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIMENSIONS
ELECTROCHEMISTRY
EMISSION SPECTROSCOPY
HETEROCYCLIC COMPOUNDS
IONS
LATTICE PARAMETERS
LENGTH
LIGANDS
MAGNETIC RESONANCE
MONOCLINIC LATTICES
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OSMIUM COMPLEXES
PYRIDINES
RESONANCE
RUTHENIUM COMPLEXES
SORPTION
SPECTROSCOPY
STRUCTURAL CHEMICAL ANALYSIS
TRANSITION ELEMENT COMPLEXES
400201* -- Chemical & Physicochemical Properties
400400 -- Electrochemistry
ABSORPTION
ABSORPTION SPECTROSCOPY
AROMATICS
AZINES
BIPYRIDINES
CATIONS
CHARGED PARTICLES
CHEMISTRY
COMPLEXES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIMENSIONS
ELECTROCHEMISTRY
EMISSION SPECTROSCOPY
HETEROCYCLIC COMPOUNDS
IONS
LATTICE PARAMETERS
LENGTH
LIGANDS
MAGNETIC RESONANCE
MONOCLINIC LATTICES
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OSMIUM COMPLEXES
PYRIDINES
RESONANCE
RUTHENIUM COMPLEXES
SORPTION
SPECTROSCOPY
STRUCTURAL CHEMICAL ANALYSIS
TRANSITION ELEMENT COMPLEXES