Identification fine du processus d'isolation électrique de la poudre de fer par action de l'acide phosphorique. Étude de l'influence des paramètres physico-chimiques du milieu sur la qualité des matériaux isolés

Contrat SAPHYR (1992-1993

Réactions d'alcynes électronégatifs vis-à-vis d'organothiolates d'éléments de transition ou d'hydrures métalliques

Contrat OTAN, n° 032-80 (1980-1982

Non-noble metal-based molecular catalysts for proton reduction

International audienc

A few selected aspects of electrode-induced reactions at mono- and dinuclear molybdenum-sulfur centres.

International audienceEditing an encyclopedia has already been a formidable task in the not too distant past—it is an even more difficult task today. Thus it is not surprising to realize that an encyclopedia covering electrochemistry, an extremely diverse and multidisciplinary area of research and development, has not been published again after the “Encyclopedia of the Electrochemistry of the Elements” that has been finished decades ago by A.J. Bard—and this work actually covered only very selected and limited areas of the field. Thus the present volume, being a part of an eleven-book enterprise, attempts to be a building block of a work standing in the tradition of famous predecessors (e.g.. Encyclopédie by D. Diderot and J. d’Alembert 1751–1775).A certainly very challenging task is a complete overview of experimental methods including both traditional (classical) and nontraditional (e.g. spectroscopic or surface analytical) methods because of the extremely large number of methods in particular in the..

Recent advances in the chemistry of tris(thiolato) bridged cyclopentadienyl dimolybdenum complexes

International audienceThe chemistry of tris(thiolato) bridged dimolybdenum compounds in low oxidation states (mostly III) is considered. Various synthetic routes lead to chalcogenide-bridged dinuclear complexes of group 6 metals (mainly Mo). Extensive chemistry of these derivatives is reviewed. Their reactivity towards various reagents such as alkynes, isonitriles, nitriles, propargylic alcohols, azides, hydrazines, carbon disulfide…, demonstrates their ability for activation of small unsaturated molecules through new C–X (X = C, N, O, S…) bonds formation or cleavage

[FeFe]-Hydrogenases Models

International audienceAdvances in Bioorganometallic Chemistry examines the synthesis, structure and reactivity of bioorganometallics, their pharmaceutical applications, hydrogenase, vitamin B12-like systems, and metalloproteins. It is written by the top researchers in the field and compiled by editors Toshikazu Hirao and Toshiyuki Moriuchi. Developments in this new field of bioorganometallic chemistry, a hybrid between biology and organometallic chemistry, happen very quickly and this comprehensive reference offers the latest research and findings in the field. The book features a discussion of the synthesis, structure, and reactivity of bioorganometallics, and an examination of hydrogenase-like systems, which were designed to demonstrate catalytic activities and functional properties. Advances in Bioorganometallic Chemistry also includes a discussion of bioorganometallics as they relate to medicinal chemistry, specifically applications of metalloproteins, metalloenzymes, and applications in bioimaging. The book concludes with coverage of vitamin B12-like systems, including the latest developments in derivatives designed to perform bio-inspired catalytic reactions.Table of Contents1. Synthesis, structure and reactivity2. Hydrogenase3. Medicinal Chemistry and Metallodrugs4. Metalloproteins and metalloenzymes5. Vitamin B1

Phosphorus–carbon(pyridyl) bond cleavage on reacting diphenyl-2-pyridylphosphine with triiron dodecacarbonyl

International audienceThe reaction of [Fe3(CO)12] with diphenyl-2-pyridylphosphine (PPh2Py) in refluxing toluene for 1 h afforded three compounds, [Fe2(CO)6(μ-PPh2)(μ-κ2-C,N-C5H4N)] (1), [Fe(CO)4(κ1-P-PPh2Py)] (2), and [Fe(CO)3(κ1-P-PPh2Py)2] (3) in 23%, 10% and 3.5% yields after work-up, respectively. The PPh2Py ligand acts as a terminal P-donor ligand in 2 and 3, while in 1 it underwent a selective phosphorus–carbon(pyridyl) bond cleavage to afford phosphido- and pyridyl-bridged ligands. The complexes were characterized by elemental analysis, FAB-mass, FTIR, 1H and 31P–{1H}NMR spectroscopies. Compounds 1 and 2 were also characterized by X-ray single crystal

Tri‐ and tetra‐substituted derivatives of [Fe2(CO)6(µ‐dithiolate)] as novel dinuclear platforms related to the H‐cluster of [FeFe]H2ases

International audienceNovel carbonyl dithiolate diiron complexes [Fe 2 (CO) 6-x L x (µ-dithiolate)] (x = 3, 4), related to the active site of [FeFe]-hydrogenases, have been synthesized by photolysis of hexacarbonyl species [Fe 2 (CO) 6 (µ-dithiolate)] (dithiolate = {S 2 (CH 2 ) 3 } (pdt), {SCH 2 } 2 NR with R = i Pr (adt i-Pr ) or Bn (adt Bn )). The new compounds were characterized by structural and spectroscopic methods. Variable-temperature (VT) NMR experiments revealed their fluxionality in solution depending on terminal ligands exchanges and dithiolate bridge motions. Preliminary results on their protonation giving hydride species and their electrochemical properties are reported