Reduction of carbon monoxide. Past research summary

• Main Author: Schrock, R.R.
• Language: unknown
• Published: 2008
• Subjects: 37 INORGANIC; ORGANIC; PHYSICAL AND ANALYTICAL CHEMISTRY; CARBON MONOXIDE; REDUCTION; ISONITRILES; TANTALUM COMPLEXES; CHEMICAL PREPARATION; CHEMICAL REACTIONS; RESEARCH PROGRAMS; STRUCTURAL CHEMICAL ANALYSIS; NUCLEAR MAGNETIC RESONANCE; ORGANIC CHLORINE COMPOUNDS; CARBON COMPOUNDS; CARBON OXIDES; CARBONIC ACID DERIVATIVES; CHALCOGENIDES; COMPLEXES; MAGNETIC RESONANCE; ORGANIC COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; RESONANCE; SYNTHESIS; TRANSITION ELEMENT COMPLEXES; Carbonic acid
• Online Access: http://www.osti.gov/servlets/purl/5642912; https://www.osti.gov/biblio/5642912; https://doi.org/10.2172/5642912

Research programs for the year on the preparation, characterization, and reactions of binuclear tantalum complexes are described. All evidence to date suggest the following of these dimeric molecules: (1) the dimer does not break into monomers under mild conditions; (2) intermolecular hydride exchange is not negligible, but it is slow; (3) intermolecular non-ionic halide exchange is fast; (4) the ends of the dimers can rotate partially with respect to one another. The binuclear tantalum hydride complexes were found to react with carbon monoxide to give a molecule which is the only example of reduction of CO by a transition metal hydride to give a complex containing a CHO ligand. Isonitrides also reacted in a similar manner with dimeric tantalum hydride. (ATT)