The Coordination and Bioinorganic Chemistry of Molybdenum
09 Mar 2007-pp 1-223
About: The article was published on 2007-03-09. It has received 78 citations till now. The article focuses on the topics: Bioorganometallic chemistry & Bioinorganic chemistry.
Citations
More filters
TL;DR: The 2011 WHO Guidelines for Drinking-Water Quality (fourth edition) advised a health-based value of 70μg/L for Mo but this is no longer promulgated as a formal guideline value as WHO consider such concentrations to be rarely found in drinking water as discussed by the authors.
196 citations
TL;DR: An overview of the current state of our understanding of the molybdenum-containing enzyme xanthine oxidoreductase is presented, with an emphasis on work done in the past five years.
Abstract: An overview of the current state of our understanding of the reaction mechanism of the molybdenum-containing enzyme xanthine oxidoreductase is presented, with an emphasis on work done in the past five years Recent studies of the biosynthesis of the pterin cofactor bound to the metal in the active site are also reviewed, as is crystallographic work that has clarified the coordination geometry of the molybdenum center This structural work provides the context in which to understand recent mechanistic studies of the enzyme, in particular those aimed at elucidating the role of specific amino acid residues in the active site of the enzyme(© Wiley-VCH Verlag GmbH & Co KGaA, 69451 Weinheim, Germany, 2006)
119 citations
TL;DR: In this article, synthetic aspects of molybdenum sulfide-based materials were reviewed, with emphasis on the catalytic materials, and a number of preparation methods were critically compared, including molecular precursor decomposition, hydrothermal, soft chemistry aqueous, surfactant-aided, intercalation-exfoliation, and solid gas reactions.
114 citations
TL;DR: The ability of Desulfovibrio desulfuricans formate dehydrogenase (DdFDH) to reduce carbon dioxide was kinetically and mechanistically characterized and a kinetic model of a hysteretic enzyme is proposed to interpret and predict the progress curves of the Dd FDH-catalyzed reactions.
Abstract: Carbon dioxide accumulation is a major concern for the ecosystems, but its abundance and low cost make it an interesting source for the production of chemical feedstocks and fuels. However, the thermodynamic and kinetic stability of the carbon dioxide molecule makes its activation a challenging task. Studying the chemistry used by nature to functionalize carbon dioxide should be helpful for the development of new efficient (bio)catalysts for atmospheric carbon dioxide utilization. In this work, the ability of Desulfovibrio desulfuricans formate dehydrogenase (Dd FDH) to reduce carbon dioxide was kinetically and mechanistically characterized. The Dd FDH is suggested to be purified in an inactive form that has to be activated through a reduction-dependent mechanism. A kinetic model of a hysteretic enzyme is proposed to interpret and predict the progress curves of the Dd FDH-catalyzed reactions (initial lag phase and subsequent faster phase). Once activated, Dd FDH is able to efficiently catalyze, not only t...
103 citations
TL;DR: The mesoporous molecular sieve MCM-41 was covalently grafted with 3-aminopropyl trimethoxysilane (AmpMCM41) in this article.
Abstract: The mesoporous molecular sieve MCM-41 was covalently grafted with 3-aminopropyl trimethoxysilane to give aminopropyl modified MCM-41 (AmpMCM-41). Reaction of this material with furfural, pyrrolcarbaldehyde, 2-acetylpyrrol, 2-aminoacetophenone, salicylaldehyde and acetylacetone afforded the corresponding supported Schiff base ligands. Subsequent reaction with bis(acetylacetonato)dioxomolybdenum(VI) leads to various molybdenum complexes supported on MCM-41 through propyl chain spacer. Characterization of these materials was carried out with FT-IR, atomic absorption spectroscopy, powder X-ray diffraction (XRD) and BET nitrogen adsorption–desorption methods. The XRD and BET analyses revealed that textural properties of support were preserved during the grafting experiments. The resultant materials successfully catalyzed the epoxidation of cyclooctene, cyclohexene, 1-hexene and 1-octene with tert -butyl hydroperoxide (TBHP) to the corresponding epoxides with 98–100% selectivities.
92 citations
References
More filters
21 citations
21 citations
TL;DR: In this article, a monoclinic, space-group P21/c, space group P 21/c with a= 10·330(11), b= 14·526(13), c= 22·120(16)A, β= 99·76(13)°, Z= 4.
Abstract: Crystals of the title compound are monoclinic, space-group P21/c, with a= 10·330(11), b= 14·526(13), c= 22·120(16)A, β= 99·76(13)°, Z= 4. The intensities of 1833 independent reflections above background were collected by counter methods and the structure has been refined by full-matrix least-squares methods to R 0·064. The molybdenum atom is seven-co-ordinate with a slightly distorted capped octahedral environment. A carbonyl group occupies the unique capping position [Mo–C 1·895(19)A]. The capped face of the octahedron contains the other two carbonyl groups [Mo–C 1·958(20) and 1·935(22)A] and a phosphorus from the bidentate ligand [Mo–P 2·500(4)A]. The uncapped face contains two bromine atoms [2·658(2) and 2·665(3)A] and the other phosphorus atom [2·618(5)A], this bond Mo–P (trans to CO), being significantly longer (by 0·12 A) than Mo–P (trans to Br).
21 citations
TL;DR: Moore and Larson as discussed by the authors showed that the properties of these compounds are different from those reported by Moore and Larson for other compounds of the same formula, and confirmed that their complexes are monomeric.
Abstract: Complexes of the type Mo(CO)2RPh3(dtc)2 (R = P, As, Sb; dtc = dialkyldithiocarbamato) have been prepared by the interaction of sodium dialkyldithiocarbamates with, for example, dichlorobis(triphenylphosphine)trioarbonylmolybdenum(11). In solution the complexes are susceptible to oxidation, but the product obtained depends strongly upon the nature of the solvent used. In acetone solution oxidation yields complexes of the type No2O3(dtc)4; this reaction is very similar to that reported previously for the oxidation of the parent compounds Mo(CO)3(dtc)2 and Mo(CO)2(dtc)2. However, oxidation of Mo(CO)2RPh3(dtc)2 in carbon tetrachloride-benzene mixture gives molybdenum(VI) derivatives of empirical formulae MoO2(dtc)2. The properties of these compounds are different from those reported by Moore and Larson for other compounds of the same formula. Infrared and mass spectrometric studies have shown that our complexes are dimeric and it has been confirmed that those of Moore and Larson are monomeric.
21 citations
TL;DR: Trimethylsilyl azide as discussed by the authors is a convenient reagent for the preparation of molybdenum(VI) and molybinear(V) nitrido-complexes, most of which are air-stable crystalline solids.
Abstract: Trimethylsilyl azide is a convenient reagent for the preparation of molybdenum(VI) and molybdenum(V) nitrido-complexes, most of which are air-stable crystalline solids; the 7-co-ordinate complexes, [MoN(S2CNR2)3](R = alkyl), are obtained from [MoCl4(thf)2], the silyl azide, and Me3SiS2CNR2, or from [MoCl(S2CNR2)3] and azides.
21 citations