A Ruthenium−Dihydrogen Putative Intermediate in Ketone Hydrogenation

Autor:	Carolyn G. Leong, Robin J. Hamilton, Glen Bigam, Steven H. Bergens, Mark Miskolzie
Rok vydání:	2005
Předmět:	chemistry.chemical_classification Ketone Stereochemistry Chemistry Ligand Hydride Cationic polymerization chemistry.chemical_element General Chemistry Biochemistry Medicinal chemistry Catalysis Ruthenium chemistry.chemical_compound Colloid and Surface Chemistry Dihydrogen complex BINAP
Zdroj:	Journal of the American Chemical Society. 127:4152-4153
ISSN:	1520-5126 0002-7863
DOI:	10.1021/ja043339k
Popis:	The compound fac-[Ru((R)-BINAP)(H)(2-PrOH)3]+ (6) (BINAP = 2,2'-bis(diphenylphosphino)-1,1'-binaphthyl) reacts with (R,R)-dpen (dpen = 1,2-diphenylethylenediamine) under H2 at -60 degrees C in 2-PrOH-d8/CD2Cl2 to generate the cationic dihydrogen putative intermediate trans-[Ru((R)-BINAP)(H)(eta2-H2)((R,R)-dpen)]+ (2') without H-D exchange between the hydrogen ligands and the solvent. A 1H NMR study concludes that the dihydrogen ligand in 2' does not protonate 2-PrOH to a catalytically significant extent, and that 2' requires an added base or hydride source to be an active catalyst.
Databáze:	OpenAIRE
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