η6-Arene complexes of ruthenium and osmium with pendant donor functionalities
Marziale, Alexander N.
Kiefer, Florian J.
Fässler, Thomas F.
KAUST DepartmentKAUST Catalysis Center (KCC)
Physical Sciences and Engineering (PSE) Division
Chemical Science Program
Biological & Organometallic Catalysis Laboratories
Permanent link to this recordhttp://hdl.handle.net/10754/561539
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AbstractConversion of 4′-(2,5-dihydrophenyl)butanol or N-trifluoroacetyl-2,5- dihydrobenzylamine with MCl3·n H2O (M = Ru, Os) affords the corresponding dimeric η6-arene complexes in good to excellent yields. Under similar reaction conditions, the amine functionalized arene precursor 2,5-dihydrobenzylamine yields the corresponding Ru(II) complex. For osmium, HCl induced oxidation leads to formation of [OsCl6] 2- salts. However, under optimized reaction conditions, conversion of the precursor 2,5-dihydrobenzylamine chloride results in clean formation of η6-arene Os(II) complex. X-ray structures of [(η6- benzyl ammonium)(dmso)RuCl2] and (2,5-dihydrobenzyl ammonium) 4[OsCl6]2confirm the spectroscopic data. High stability towards air and acid as well as enhanced solubility in water is observed for all η6-arene complexes. © 2010 Elsevier B.V. All rights reserved.
SponsorsThe authors are grateful to Prof. W. A. Herrmann for generous support. We thank the Stifterverband fur die deutsche Wissenschaft (Projekt-Nr. 11047: ForschungsDozentur MolekulareKatalyse), the Elitenetzwerk Bayern (graduate fellowship for T. R. and A. N. M) andthe IDK NanoCat for funding.