Synthesis, electrochemical properties, and charge-transfer band of binuclear 1,10-phenanthroline/bis(2,2'-bipyridine) complexes of ruthenium
Journal Article
·
· Inorg. Chem.; (United States)
- Inst. for Organic Chemistry TNO, Utrecht, Netherlands
The preparation of the mononuclear (Ru(bpy)/sub 2/L)/sup 2 +/ (L = bpy, phenOCH/sub 3/, phenC(==O)NH-n-C/sub 3/H/sub 7/), the binuclear ((bpy)/sub 2/RuLRu(bpy)/sub 2/)/sup 4 +/ (L = phenO(CH/sub 2/CH/sub 2/O)/sub n/phen (n = 2-4), phenC(==O)NHCH/sub 2/CH/sub 2/O)/sub n/(CH/sub 2/CH/sub 2/NH(O==)Cphen (n = 1,2), phenC(==O)NH(CH/sub 2/)/sub n/NH(O==)Cphen (n = 3,6)), and the trinuclear (N(CH/sub 2/CH/sub 2/OphenRu(bpy)/sub 2/)/sub 3/)/sup 6 +/ is described. Both the mononuclear and the binuclear complexes exhibit at a platinum electrode one oxidation wave and three reduction waves at potentials close to those observed for Ru(bpy)/sub 3//sup 2 +/. The oxidation and the reductions of the binuclear complexes are two-electron-transfer reactions. From the reduction of the peak width of the differential pulse polarograms it is concluded that K/sub con/less than or equal to 1 for the conproportionation equilibrium (2,2) + (3,3) in equilibrium 2(2,3). The mixed-valence 5+ ion has an intervalence-transfer band in the solid state (KBr) in the near-infrared spectral region. Given the saturated character of the bridge, this represents a clear example of an intramolecular outer-sphere electron-transfer transition.
- OSTI ID:
- 6067344
- Journal Information:
- Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 20:11; ISSN INOCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
400400 -- Electrochemistry
ABSORPTION SPECTRA
AZINES
BIPYRIDINES
CHEMISTRY
COMPLEXES
DATA
ELECTRICAL PROPERTIES
ELECTROCHEMISTRY
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
INFORMATION
NMR SPECTRA
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHENANTHROLINES
PHYSICAL PROPERTIES
POLAROGRAPHY
PYRIDINES
RUTHENIUM COMPLEXES
SPECTRA
SYNTHESIS
TRANSITION ELEMENT COMPLEXES
VOLTAMETRY
400201* -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
400400 -- Electrochemistry
ABSORPTION SPECTRA
AZINES
BIPYRIDINES
CHEMISTRY
COMPLEXES
DATA
ELECTRICAL PROPERTIES
ELECTROCHEMISTRY
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
INFORMATION
NMR SPECTRA
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHENANTHROLINES
PHYSICAL PROPERTIES
POLAROGRAPHY
PYRIDINES
RUTHENIUM COMPLEXES
SPECTRA
SYNTHESIS
TRANSITION ELEMENT COMPLEXES
VOLTAMETRY