Hydrido carbonyl complexes of osmium(II) and ruthenium(II) containing polypyridyl ligands
Several different synthetic routes have been explored to produce hydrido complexes of Os(II) and Ru(II) containing polypyridyl ligands. The resulting complexes, the majority of which contain coordinated CO, are of three types: cis-(M(chelate)/sub 2/(CO)H)/sup +/, trans-(Os(chelate)(PPh/sub 3/)/sub 2/(CO)H)/sup +/, and (Os(chelate)(diphos)(PR/sub 2/)H)/sup +/ (where M = Ru or Os and chelate is, for example, 2,2'-bipyridine or 1,10-phenanthroline or a related ligand). The electronic, infrared, and NMR spectral properties of the complexes are discussed along with the redox properties of their ground and excited states. An important observation is that the hydride ligand endows the metal to ligand charge-transfer (MLCT) excited states of some of the complexes with strong reducing properties. The ground-state chemistry of the complexes is discussed especially with regard to their use as synthetic precursors to new, highly oxidizing, long-lived MLCT excited states of Os(II)< e.g., (Os/sup III/(bpy/sup -/.)(bpy)(CO)(CH/sub 3/CH))/sup 2 +/. 33 references, 7 figures, 2 tables.
- Research Organization:
- Univ. of North Carolina, Chapel Hill
- OSTI ID:
- 5953164
- Journal Information:
- Organometallics; (United States), Journal Name: Organometallics; (United States) Vol. 3:8; ISSN ORGND
- Country of Publication:
- United States
- Language:
- English
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Polypyridyl hydrido complexes of osmium(II) and ruthenium(II)
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Related Subjects
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
AZINES
CARBONYLS
CHEMICAL PREPARATION
COMPLEXES
DATA
ELECTRONIC STRUCTURE
ENERGY LEVELS
EXCITED STATES
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
INFORMATION
INFRARED SPECTRA
NMR SPECTRA
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANOMETALLIC COMPOUNDS
OSMIUM COMPLEXES
PYRIDINES
RUTHENIUM COMPLEXES
SPECTRA
SYNTHESIS
TRANSITION ELEMENT COMPLEXES