1,721,047 research outputs found
Intermolecular Cross-coupling between 2-Olefin and 1-Allyl Ligands in Cationic Platinum(II) and Palladium(II) Complexes
No full textThe n1-allyl platinum and palladium cationic complexes tridentate neutral pincer ligand [(PNP)M(n1-CH2CH=CHR1)]+ (1, PNP = 2,6-bis-diphenylphosphinomethylpyridine) undergo intermol. attack of the terminal gamma-carbon atom of the allyl system at the coordinated olefin of dicationic platinum and palladium complexes [(PNP)M(n2-CH2=CHR)]2+ (2), producing binuclear species [(PNP)M(n2:n1-CH2=CHCHR1CHRCH2)M(PNP)]3+ (4), in which the metal formerly p-coordinated becomes s-bonded, and the metal formerly s-bonded becomes p-coordinated. The reaction can be run catalytically with respect to the addn. of ethylene to a n1-allyl complex, using the dicationic ethylene complex as catalyst
New catalytic cross-coupling reactions of ethylene promoted by dicationic Pt2+ and Pd2+ complexes
No full textCoordinated olefins as incipient carbocations: catalytic codimerization of ethylene and internal olefins by a dicationic Pt(II)-ethylene complex
No full textRICONOSCIMENTO CHIRALE IN COMPLESSI OLEFINICI DI AG(I) CON UNA DIAMMINA CHIRALE: DISCRIMINAZIONE H1-NMR DI ENANTIOMERI DI OLEFINE CHIRALI
No full textChiral Recognition in Silver(I) Olefin Complexes with Chiral Diamines. Resolution of Racemic Alkenes and NMR Discrimination of Enantiomers.
No full textThe fragment [(chiral diamine)Ag]+ is a very useful reagent, both for the resoln. of racemic alkenes and for the 1H or 13C NMR detn. of the enantiomeric abundances of chiral olefinic compds
Catalytic coupling of ethylene and internal olefins by dicationic palladium(II) and Platinum(II) complexes: switching from hydrovinylation to cyclopropane ring formation
No full textThe dicationic palladium(II) and platinum(II) complexes [(PNP)M(C2H4)](BF4)2 (1a, M = Pt; 1b, M = Pd; PNP = 2,6-bis((diphenylphosphino)methyl)pyridine) and [(PPP)Pt(C2H4)](BF4)2 (7; PPP = triphos) catalyze a cross-coupling reaction of ethylene with tri- and tetrasubstituted olefins, which can lead to both hydrovinylation and cyclopropanation products. The product ratio is strongly affected by the choice of the ligand and of the metal, the two limiting cases being 1a and 7, which selectively give the hydrovinylation and the cyclopropanation products, resp
Highly selective catalytic hydrovinylation of internal alkenes by a dicationic platinum(II) complex
No full textSynthesis and Reactivity of Square-Planar PtII-η1-Hydrocarbyl Complexes Containing cis-Coordinated Olefin or Alkyne
No full textCOORDINATED OLEFINS AS INCIPIENT CARBOCATIONS: CATALYTIC CODIMERIZATION OF ETHYLENE AND INTERNAL OLEFINS BY A DICATIONIC PT(II)-ETHYLENE COMPLEX
No full textNovel chiral diimines and diamines derived from sugars in copper catalysed asymmetric cyclopropanation
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