Source of materialTo a stirred solution of 0.4 g (2.2 mmol) of lithiated (4-methylpyridin-2-yl)-trimethylsilanyl-amine in 8 mL diethyl ether a suspension of 0.308 g (1.1 mmol) [(cod)RuCh] (cod = 1,5-cyclooctadiene) in 10 mL thf was added at -30 °C and the solution was stirred for six hours at this temperature. The reaction mixture was then stored at -25 °C over night. The solvent was removed in vacuum and the residue was extracted with hexane and filtered. The yellow-brown filtrate was stored at -25 °Cto afford yellow crystals suitable for X-ray crystal structure analysis (yield 0.38 g, 61 %). DiscussionThe development of amido metal chemistry of the early transition metals increased dramatically in the last decades. In comparison late transition amido metal chemistry is much less developed [1]. The amido-metal bond in the complexes can be stabilized by additional N-donor functions, for instance by a pyridine moiety [2].Recently, we have reported examples of amido complexes of late transition metals (nickel and palladium) stabilized by deprotonated 2-aminopyridines [3,4]. The first aminopyridinato complex of ruthenium, a dinuclear complex, was reported by Cotton et al.[5], The title compound, a mononuclear ruthenium complex, consists of two aminopyridinato ligands and one cod ligand. The bulky trimethylsilyl substituents at the amido Ν atoms force the aminopyridinato ligands into a transoid arrangement. An unusual binding situation is notified by the small chelating angles of 63.00° (Z.N1-Rul-N2) and of 63.10° (ZN3-Rul-N4). Both pyridine rings are in plane with the ruthenium atom and the appropriate amido Ν atoms. The deviations from the planes are 0.0047 Ä and 0.0141 A. The angle between these planes is 87.3°. For each of the two aminopyridinato ligands, the Ru-Npyndme distance (<*(Rul-N2) = 2.071 Ä, d{Rul-N4) = 2.082 Ä) is significantly shorter than the corresponding Ru-Namido distance ((Rul-Nl) = 2.179 Ä, d(Rul-N3) = 2.173 Ä).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.