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Diphosphinite Ligands (diphosphinite + ligand)

Distribution by Scientific Domains
Chemistry100%

Selected Abstracts

Conformational Flexibility in a Carbobicyclic Diphosphinite Ligand

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Issue 20 2007
Ian J. S. Fairlamb
Abstract An unsymmetrical bicyclo[3.2.0]heptanyl diphosphinite ligand, FLEXIphosO, shows flexible coordination modes to palladium centres. The X-ray crystal structure for [Pd02(P,P,)3] has been determined which reveals that the bicyclic backbone of the FLEXIphosO ligand exists in an exo -envelope conformation. The change in conformation stands in stark contrast to that observed in mononuclear neutral and cationic palladium(II) complexes containing the FLEXIphosO ligand, where an endo -envelope is observed in solution and in the solid-state. Theoretical studies provide an insight into the relative stability of palladium(0) complexes containing the FLEXIphosO ligand. Another large spanning angle ligand, SPANphos, does not form a similar palladium(0) dimer complex under identical reaction conditions, highlighting the unusual behaviour of the FLEXIphosO ligand.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007) [source]

Asymmetric Hydrogenation of Quinoxalines with Diphosphinite Ligands: A Practical Synthesis of Enantioenriched, Substituted Tetrahydroquinoxalines,

ANGEWANDTE CHEMIE, Issue 48 2009
Weijun Tang Dr.
Leicht zugänglich ist ein chiraler Iridium-(H8 -Binapo)-Katalysator, der die hoch enantioselektive Hydrierung von Chinoxalinen bei hohen Substrat/Katalysator-Verhältnissen von 100 bis 20,000 vermittelt. Die neue Methode dient als praktischer Ansatz für die Synthese optisch aktiver Tetrahydrochinoxalin-Derivate (siehe Schema; cod=1,5-Cyclooctadien). [source]

ChemInform Abstract: Asymmetric Hydrogenation of Quinoxalines with Diphosphinite Ligands: A Practical Synthesis of Enantioenriched, Substituted Tetrahydroquinoxalines.

CHEMINFORM, Issue 12 2010
Weijun Tang
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

Conformational Flexibility in a Carbobicyclic Diphosphinite Ligand

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Issue 20 2007
Ian J. S. Fairlamb
Abstract An unsymmetrical bicyclo[3.2.0]heptanyl diphosphinite ligand, FLEXIphosO, shows flexible coordination modes to palladium centres. The X-ray crystal structure for [Pd02(P,P,)3] has been determined which reveals that the bicyclic backbone of the FLEXIphosO ligand exists in an exo -envelope conformation. The change in conformation stands in stark contrast to that observed in mononuclear neutral and cationic palladium(II) complexes containing the FLEXIphosO ligand, where an endo -envelope is observed in solution and in the solid-state. Theoretical studies provide an insight into the relative stability of palladium(0) complexes containing the FLEXIphosO ligand. Another large spanning angle ligand, SPANphos, does not form a similar palladium(0) dimer complex under identical reaction conditions, highlighting the unusual behaviour of the FLEXIphosO ligand.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007) [source]