Nitrogen-Functionalized Cyclopentadienyl Ligands with a Rigid Framework: Complexation Behavior and Properties of Cobalt(I), -(II), and -(III) Half-Sandwich Complexes
作者:Markus Enders、Gunter Ludwig、Hans Pritzkow
DOI:10.1021/om0007163
日期:2001.3.1
half-sandwich complexes 7 and 3, respectively. Irradiation leads to the binuclear complexes 4 and 8 with a Co−Co double bond. Oxidation of 3 or 7a is possible with iodine. Whereas 7a directly forms the CoIII complex 9 with coordination of the quinoline to the metal, 3 yields the monocarbonyldiiodo complex 5. Upon gentle heating in dichloromethane, 5 loses carbon monoxide to give the cobaltcomplex 6, displaying
Monocyclopentadienyl complexes of chromium, molybdenum or tungsten
申请人:——
公开号:US20030036658A1
公开(公告)日:2003-02-20
Substituted monocyclopentadienyl, monoindenyl, monofluorenyl and heterocyclopentadienyl complexes of chromium, molybdenum or tungsten in which at least one of the substituents on the cyclopentadienyl ring carries a donor function which is bonded rigidly, not exclusively via sp
3
-hybridized carbon or silicon atoms, and a process for the polymerization of olefins.
Reactivity of halfsandwich rare-earth metal methylaluminates toward potassium (2,4,6-tri-tert-butylphenyl)amide and 1-adamantylamine
作者:Dorothea Schädle、Markus Enders、Christoph Schädle、Cäcilia Maichle-Mössmer、Karl W. Törnroos、Reiner Anwander
DOI:10.1039/c5nj00800j
日期:——
Donor functionalities drastically affect salt-metathetical methylaluminato–amido exchange reactions in CpRLn(AlMe4)2 by triggering methylaluminate cleavage and C–H bond activation of proximal aliphatic groups.
Monocyclopentadienylkomplexe von Chrom, Molybdän oder Wolfram mit einer Donorbrücke
申请人:Basell Polyolefine GmbH
公开号:EP1288219A2
公开(公告)日:2003-03-05
Substituierte Monocyclopentadienyl-, Monoindenyl-, Monofluorenyloder Heterocyclopentadienylkomplexe von Chrom, Molybdän oder Wolfram, wobei mindestens einer der Substituenten am Cyclopentadienylring eine rigide, nicht nur ausschließlich über sp3 hybridisierte Kohlenstoff- oder Silizium-Atome gebundene Donorfunktion trägt sowie ein Verfahren zur Polymerisation von Olefinen.
Rhodium-carbonyl complexes with a quinolyl functionalized Cp-ligand: synthesis and photochemical activation
作者:Markus Enders、Gerald Kohl、Hans Pritzkow
DOI:10.1016/j.jorganchem.2004.06.046
日期:2004.9
Dicarbonyl[eta(5)-2,3,4,5-tetramethyl-1-(8-quinolyl)cyclopentadienyl]rhodium(I) (1) was prepared by the reaction of [Rh(CO2)Cl](2) with 2,3,4,5-tetramethyl-1-(8-quinolyl)cyclopentadienyl-potassium. Irradiation of 1 in chloroform or dichloromethane as solvent leads to the formation of dichloro[eta(5)-2,3,4,5-tetramethyl-1-(8-quinolyl)cyclopentadienyl]rhodium(III) (2). When Rh-6(CO)(16) is present, the cluster adds to the 8-quinolyl-cp-rhodium fragment and the compound [eta(5)-2,3,4,5-tetramethyl-l-(8-quinolyl)cyclopentadie-nyl]rhodium-di-mu-carbonyl-hexarhodiumtetradecacarbonyl (3) is formed in 65% yield. The coordination sphere of the rhodium(III) atom in compound 2 and of the rhodium(I) atom in 3 is completed by a coordination of the quinolyl moiety. This was revealed by NMR spectroscopy as well as by X-ray analyses. (C) 2004 Elsevier B.V. All rights reserved.