Synthesis of open metal carbonyl clusters
AssigneesChevron U.S.A. Inc., The Regents of the University of California
InventorsAlexander S. Katz, Alexander Kuperman, Alexander Okrut, Ron C. Runnebaum, Xiaoying Ouyang
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Abstract
The present invention is directed to the synthesis of novel stable open metal clusters by selective oxidation of bound ligands. The synthesis comprises, for example, using an amine based oxidant for decarbonylation of specific carbonyl ligands. The synthesis can also comprise further removal of a bound amine group by an acid. The resulting metal cluster contains a coordinatively unsaturated site comprising a carbonyl vacancy. The resulting metal cluster can be used as a catalyst in a variety of chemical transformations.
Claims22
A method for preparing an open metal carbonyl cluster comprising chemically reacting a closed metal carbonyl cluster and an opening agent, with the opening agent reacting with a bound carbonyl group so as to unbind it from the cluster and leave behind a CO-labile ligand on the cluster, and wherein the closed metal carbonyl cluster is bound with three sterically protective ligands.
A method for preparing an open metal carbonyl cluster comprising chemically reacting a closed metal carbonyl cluster and an opening agent, with the opening agent reacting with a bound carbonyl group so as to unbind it from the cluster and leave behind a CO-labile ligand on the cluster, and then removing the CO-labile ligand to create vacant sites, wherein the co-labile ligand is removed by reaction with a strong acid or by heating the open metal carbonyl cluster under flow of an inert gas.
Dependencies are inferred from the claim text.