Rhenium, technetium, and tungsten complexes of the 1,2-benzoquinones
The synthesis and characterization of rhenium, technetium, and tungsten complexes containing o-semiquinone or catecholate ligands are reported. The tris-chelated rhenium (VI) catecholate complexes, Re(3,5-di-tert-butylcatecholate){sub 3} and Re(tetrachlorocatecholate){sub 3}, have been prepared from photolytic and thermal reactions of dirhenium decacarbonyl and the corresponding benzoquinoes. o-Semiquinone complexes of rhenium were also prepared and include the tetracarbonyl rhenium semiquinone complexes, Re(CO){sub 4} (3,5-di-tert-butylsemiquinone), Re(CO){sub 4} (tetrachlorosemiquinone), Re(CO){sub 4} (9,10-phenanthrenesemiquinone), as well as the dimeric complex, Re(CO){sub 7} (9,10-phenanthrenesemiquinone){sub 2}. The crystal structures and characterization, including magnetic, EPR, spectroscopic, and electrochemical experiments, of Re(3,5-di-tert-butylcatecholate){sub 3}, Re(tetrachlorocatecholate){sub 3}, and Re(CO){sub 7}(9,10-phenanthrenesemiquinone){sub 2} are reported in addition to mechanistic details of this chemistry. The dimeric tungsten(VI) catecholate complex, W{sub 2}(tetrachlorocatecholate){sub 6}, was prepared upon reflux of a toluene solution of tungsten hexacarbonyl and tetrachloro-1,2-benzoquinone. The X-ray structure of this complex is reported in addition to characterization of both the tungsten complex and its molybdenum analogue, Mo{sub 2}(tetrachlorocatecholate){sub 6}, including results of spectroscopic and electrochemical experiments.
- Research Organization:
- Colorado Univ., Boulder, CO (USA)
- OSTI ID:
- 6909919
- Country of Publication:
- United States
- Language:
- English
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
AROMATICS
CALCULATION METHODS
COMPLEXES
CRYSTAL STRUCTURE
DATA
DATA ANALYSIS
EXPERIMENTAL DATA
INFORMATION
MAGNETIC PROPERTIES
MEASURING INSTRUMENTS
MEASURING METHODS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUINONES
RHENIUM COMPLEXES
SYNTHESIS
TECHNETIUM COMPLEXES
TRANSITION ELEMENT COMPLEXES
TUNGSTEN COMPLEXES