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Showing 1 to 16 of 16 for “"indenyl"”.
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The 'Indenyl Effect' in iridium(I) olefin complexes
… by two-dimensional NMR techniques. Due to the ""Indenyl Effect,"" ($\eta\sp5$-C$\sb9$H$\sb7$)Ir($\eta\sp2$-C$\sb8$H$\sb{14}$)CO was more reactive than CpIr($\eta\sp2$-C$\sb8$H$\sb{14}$)CO toward Lewis bases. The labile cyclooctene ring of …
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Binuclear Transition Metal Derivatives of 1,2-Bis(indenyl)ethane
Heating Ru3(CO)12 with 1,2-bis(indenyl)ethane in xylene provided the binuclear compounds Ru2(CO)4(mu-(eta 5-C9H6)2C2H4 and [(eta5-C9H6)C2H 4(C9H7)Ru(CO)2]2. The corresponding reaction in heptane gave instead the tetranuclear cluster [Ru4H(CO) 9(mu3-eta2-eta2-eta 5-C9H6)](C2H4)(C 9H7). The structure …
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Synthesis and properties of mononuclear and polynuclear indenyl iridium complexes
The reaction of $\rm Ir(CO)\sb2(\eta\sp5$-$\rm C\sb9H\sb7)$ with $\rm Ir(\eta\sp2$-$\rm C\sb2H\sb4)\sb2(\eta\sp5$-$\rm C\sb9H\sb7)$ provided $\rm Ir\sb3(\mu$-$\rm CO)\sb3(\eta\sp5$-$\rm C\sb9H\sb7)\sb3$, and the reaction of $\rm Ir(CO)\sb2(\eta\sp5$-$\rm C\sb9H\sb7)$ with $\rm Rh(\eta\sp2$-$\rm …
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Immobilized Bis-Indenyl Ligands for Stable and Cost-Effective Metallocene Catalysts of Hydrogenation and Polymerization Reactions
… First, a methodology of immobilization of bis-indenyl ligands on the surface of mesoporous silica gel was designed. Four bis-indenyl ligands containing functionalized tethers of various lengths with terminal alkene groups were synthesized. All bis-indenyl ligands were immobilized on the surface …
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Synthesis of Group (lV) Transition Metal Complexes and their Applications as Catalysts for Ethylene Polymerization
… complexes bearing bulky alkoxy substituents on indenyl moieties and the investigation of their potential as ethylene polymerization catalysts. Indenyl compounds bearing bulky alkoxy substituents can be prepared by refluxing phenol or naphthol derivatives with w-bromo-1-indenylalkanes and …
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Synthesis of Bridged and Unbridged Group (lV) Metallocene Complexes as Catalyst Precursors for Ethylene Polymerization
… of novel bridged and unbridged bis(indenyl) complexes of group IV metals including a study of their catalytic performance in the homogeneous polymerization of ethylene. To accomplish this goal, various ligand precursors were prepared which include 1- and 2-substituted silylindenyl …
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Synthesis, antimicrobial activity, and catalytic activity of rhodium and iridium piano stool complexes: Teaching an old dog new tricks
… a ligand for Cp*M(III) complexes. Finally, the indenyl effect was investigated for the oxidative annulation of 2-phenylimidazole with 1-phenyl-1-propyne catalyzed by a series of methyl-substituted [(indenyl)RhCl2] dimers. [(Ind*)RhCl2]2 was found to have significantly greater activity than …
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Synthese von einkernigen und mehrkernigen Übergangsmetall-Komplexen als Katalysatoren für die Ethenpolymerisation und die Ethen/1-Hexen-Copolymerisation
… eignen sich in Position 2 substituierte Bis(indenyl)zirconium-Komplexe besonders gut. Zunächst wurden Versuche zur Verbesserung der Synthesewege durchgeführt. Als günstigste Synthese erwies sich eine modifizierte Grignard-Reaktion. Dabei wurde die Grignard-Verbindung vor der Umsetzung mit …
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Pentafulvenkomplexe des Titans: Synthese, Struktur und Intermediate
… wie die Synthesen der korrespondierenden Indenyl- bzw. Tetrahydroindenylkomplexe belegen. Komplexe mit dem neuen 6,6-(3-tert-Butylpentamethylen)fulven zeigen kein dynamisches Verhalten in Lösung, dafür aber eine erstmals beobachtete pi-faciale Selektivität bei der Komplexierung in …
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Development of Palladium-Catalyzed and Iodine-Mediated Formal [4+1] Annulation Protocols. Progress toward a New Fulvene-Based Organocatalytic Platform for Carbonyl α-Functionalization
… alpha-allylation of a camphor-derived indenyl fulvene has been demonstrated. The reversible formation of fulvenes from carbonyls and electron deficient cyclopentadienes under mild nucleophilic amines catalysis has also been demonstrated and applied to several aryl and alkenyl aldehydes. …
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Synthesis and reactivity studies of high-nuclearity carbido carbonyl clusters of heptarhenium-iridium and decaruthenium
… reactivities at iridium parallel those of the indenyl complex $\rm (\eta\sp5C\sb9H\sb7)Ir(C\sb8H\sb{14})(CO),$ thus giving further support for the previously proposed analogy between ($\rm Re\sb7C(CO)\sb{21}\rbrack \sp{3-}$ and the cyclopentadienyl ligand and its derivatives. Formulation and …
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High oxidation state organometallic and coordination chemistry: The synthesis and reactivity of nitridoosmium(VI) thiolates and alkoxides
… facially-coordinant, anionic ligands, such as indenyl and tris(pyrazolyl)borate, yield mononuclear complexes. The synthesis of several nitridoosmium and nitridoruthenium(VI)-dithiolene complexes is reported in Chapter 4. Included among these are the first organometallic dithiolene complexes …
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Synthese und Charakterisierung von mono- und 1,1´-di-substituierten Ferrocenen sowie [3]- und [4]Ferrocenophanen und ihre 57Fe-NMR-spektroskopische Untersuchung
… gegen eine oder zwei 9-Fluorenyl- oder 1-Indenyl-Gruppen kann man monosubstituierte Ferrocen-derivate sowie 1,1´-Bis[indenyl(dimethyl)silyl]ferrocen bzw. 1,1´-Bis[fluorenyl(dimethyl)-silyl]ferrocen synthetisieren. II. 1-Sila-[1]ferrocenophane Eine Reihe von 1-Sila-[1]ferrocenophanen wurde …
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Early transition metal complexes of carbene donors linked to cyclopentadienyl ring analogues or amidine/amidinate moieties
The new indenyl-functionalised NHC potassium salt, 1-[3-(4, 7-dimethylindenylpropyl]-3-<br/>(2,6-diisopropylphenyl)imidazol-2-ylidenepotassium, has been synthesised. Complexes of<br/>titanium, zirconium and chromium containing this ligand and the two carbon bridge …