76 research outputs found
Linear-Selective Hydroarylation of Unactivated Terminal and Internal Olefins with Trifluoromethyl-Substituted Arenes
Full text linkReactions of a Ru(II) Phenyl Complex with Substrates that Possess C-N or C-O Multiple Bonds: C-C Bond Formation, N-H Bond Cleavage, and Decarbonylation Reactions
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Polycyclic aromatic hydrocarbons in food products originating from locally reared animals in Kuwait
No full textCobalt-Catalyzed Hydroarylation of Alkynes through Chelation-Assisted CâH Bond Activation
No full textCyclopentadienone-like behavior of fluorenone and 4,5-diazafluoren-9-one
No full textSiemeling U, Scheppelmann I, Neumann B, Stammler H-G, Schoeller W. Cyclopentadienone-like behavior of fluorenone and 4,5-diazafluoren-9-one. ORGANOMETALLICS. 2004;23(4):626-628.The aromatic compounds fluorenone (1) and 4,5-diazafluoren-9-one (2) behave like cyclopentadienones in their reaction with [Cp*Co(C2H4)(2)] (3a), affording the sandwich-type complexes [Cp*Co(eta(4)-1)] (4) and [Cp*Co(eta(4)-2)] (5), respectively, whose structures have been determined by X-ray diffraction. Both complexes show double-bond fixation in their eta(2)-coordinated six-membered rings and belong to a new structure type of mononuclear organometallics. The cobalt-coordinated ligands 1 and 2 present in 4 and 5, respectively, may be replaced by two molecules of carbon monoxide. In accord with their cyclopentadienone-like nature, they are nucleophilic and undergo O-acylation with acetyl chloride, affording cobaltocenium species
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