Synthesis and Coordination Chemistry of Chelate Ligands Containing Cyclopentadienyl, Indenyl and Fluorenyl Donors − Diastereoselectivity and NMR Structure Analysis

Substituted Cyclopentadienyl Osmium Complexes from the Reactions of OsH3Cl(PPh3)3 with Fulvenes and Cyclopentadienes

“…In fact, a number of half-sandwich ruthenium complexes of various substituted cyclopentadienyl ligands have been synthesized in the past . In contrast, the chemistry of half-sandwich osmium complexes with a substituted cyclopentadienyl ligand, with the exception of Cp*Os complexes, is still underdeveloped, despite the considerable interest in the chemistry of half-sandwich CpOs complexes .…”

The First η5-Indenylnickel Chelate Complexes with a Pendant Phosphane Tether

“…Compared to the number of cyclopentadienyl chelate complexes with a phosphane tether known, the number of respective indenyl chelate complexes that have been reported is comparably small. Most of the known indenyl chelates with a phosphane tether are complexes of rhodium − and ruthenium. ,,, In addition some complexes of iridium and of chromium have been reported. Particularly interesting in this context are some results of Zargarian et al, who attempted the synthesis of indenyl nickel chelates.…”

“…However, the authors succeeded in the synthesis of an interesting η 1 -indenylnickel complex with two chelating (diphenylphosphanyl)ethyl substituents . With only few exceptions , the complexes reported bear a diphenylphosphanyl group as the chelating ligand. Here we report on our syntheses of a variety of η 5 -indenylnickel chelates with a [2-(di- tert -butyl)phosphanyl]ethyl tether.…”

Solution structure and behaviour of Δ-cis-α-[Ru(R,R-picchxnMe2)(phi)]2+ by NMR spectroscopy and molecular modellingElectronic supplementary information (ESI) available: NMR spectra and selected NMR data. See http://www.rsc.org/suppdata/dt/b2/b208846k/

“…29,30 However, it has not generally been used for the structure determination of metal complexes, which often have few protons, though there are several examples of the characterisation of inorganic complexes using a combination of NMR spectroscopy and molecular modelling. 31, 32 The ESFF (Extensible Systematic Force Field) 28 is useful for metal complexes and organometallics because it has been parameterised for all elements up to radon and gives specific consideration to the coordination geometry of metal complexes.…”