Search results for "Ordination"
showing 10 items of 1367 documents
Chemistry of lanthanide–metal carbonyl systems: the ytterbium–chromium carbonyls interaction
2001
Abstract The interaction of the chromium carbonyl hydrides HCr2(CO)10− or HCr(CO)5− with Yb(acac)3·3H2O has been investigated, and the experimental conditions leading to the isolation of ytterbium–chromium carbonyl complex species are reported. Formulation of the coordination compounds produced by such interactions has been proposed on the basis of analytical data and IR spectroscopy.
A Route toward (Aminomethyl)cyclopentadienide Ligands and Their Group 4 Metal Complexes
2018
International audience
Nouveaux complexes organométalliques monocyclopentadiényles de lanthanides
2005
Complexes hémimétallocéniques de lanthanides early
2005
Compte rendu de : Carmine Crocco, Ma vie de brigand, Toulouse, Anacharsis, 2016, 154 p.
2016
National audience; …
Chelation of toxic metals: from fundamental advances in macrocyclic chemistry to extracting materials
2016
Exposure to lead-contaminated tap water is a persistent issue in many western countries. In the context of the 98/83/EU directive, we got involved in the design of a cartridge-based purification system that could be mounted directly on a kitchen faucet. Solid-phase extraction by covalent attachment of a lead-selective sequestering agent to the surface of silica gel was thought as an efficient method to reduce the lead level below the new parametric value, as shown by pipe-loop tests.1 High binding affinity, selectivity, and fast uptake kinetics are of crucial importance. This fine-tuning was most conveniently achieved by taking advantage of the outstanding coordination properties displayed …
Structural characterization of 2,2-di-n-butyl-4-methyl-1,3,2-dioxastannolane isolated from supercritical CO2 conditions
2009
The title compound has been isolated as single crystals from the synthesis of propylene carbonate from racemic 1,2-propanediol and carbon dioxide using n-Bu2SnO as a catalyst precursor. The X-ray crystallographic structure analysis revealed the self-assembly of di-n-butyltin(IV) 1,2-propanediolate units, linked together through long-distance Sn-O interactions leading to a one-dimensional polymeric architecture organized in a syndiotactic arrangement. The coordination geometry around the tin atoms can be described as an unusual faced-capped trigonal bipyramidal environment.
Photophysical Investigation of Iron(II) Complexes Bearing Bidentate Annulated Isomeric Pyridine-NHC Ligands
2020
The possibility of achieving luminescent and photophysically active metal-organic compounds relies on the stabilization of charge transfer states and kinetically and thermodynamically blocking non-...
Towards Iron(II) Complexes with Octahedral Geometry: Synthesis, Structure and Photophysical Properties
2020
The control of ligand-field splitting in iron (II) complexes is critical to slow down the metal-to-ligand charge transfer (MLCT)-excited states deactivation pathways. The gap between the metal-centered states is maximal when the coordination sphere of the complex approaches an ideal octahedral geometry. Two new iron(II) complexes (C1 and C2), prepared from pyridylNHC and pyridylquinoline type ligands, respectively, have a near-perfect octahedral coordination of the metal. The photophysics of the complexes have been further investigated by means of ultrafast spectroscopy and TD-DFT modeling. For C1, it is shown that&mdash
Polyamines and applications. A look at the first workshop in linear and cyclic polyamines chemistry
2008
Given their versatile coordination properties, cyclic and linear polyamines are the subject of numerous worksin many research groups. This great interest is mainly related to their use in diverse fields such as removalof metals from liquids, purification of gases, application in catalysis, in sensors, as well as in various probesfor medical applications. This paper summarizes recent results obtained by the French research groupswhich attended the first ìworkshop in linear and cyclic polyamines chemistryî.