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Book ChapterDOI

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
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Journal ArticleDOI
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

Journal ArticleDOI
Russ Hille1
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

Journal ArticleDOI
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

Journal ArticleDOI
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

Journal ArticleDOI
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
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Journal ArticleDOI
TL;DR: The molecular geometry of cis-mer [MoOCl2(PMe2Ph)3] has been determined by a three-dimensional X-ray analysis based on 2261 intensity data, measured on a four-circle diffractometer with Mo-Kα radiation.
Abstract: The molecular geometry of cis-mer-[MoOCl2(PMe2Ph)3] has been determined by a three-dimensional X-ray analysis based on 2261 intensity data, measured on a four-circle diffractometer with Mo-Kα radiation. The crystals are orthorhombic, space group Pbca, a= 17·009(6), b= 16·528(5), c= 19·311(8)A, Z= 8. The atomic co-ordinates have been determined by the heavy-atom method and refined by full-matrix least-squares to an R factor of 0·057.The crystal structure consists of monomeric molecules with almost exact non-crystallographic C8 symmetry. The co-ordination polyhedron around the molybdenum atom is a distorted octahedron. The Mo–O distance of 1·676(7)A indicates considerable π bonding character. The Mo–Cl distances are 2·551(3)(transto O) and 2.(3)A(trans to P). The Mo–P distances are 2·541 (3), 2·558(3)(trans to P) and 2·500(3)A(trans to Cl).

12 citations

Journal ArticleDOI
TL;DR: In this paper, it was shown that the reaction between molybdenum pentachloride and methanol proceeds in two ways, and the resulting compounds are described.
Abstract: Es wird gezeigt, das die Reaktion zwischen Molybdanpentachlorid und Methylalkohol in zwei Richtungen verlaufen kann. Die Reaktionsprodukte werden beschrieben. It is shown that the reaction between molybdenum pentachloride and methanol proceeds in two ways. The resulting compounds are described.

12 citations

Journal ArticleDOI
TL;DR: The crystal structure of the title compound has been determined from three-dimensional X-ray diffraction data collected by precession methods; the co-ordination around the central Mo atom is pentagonal bipyramidal.
Abstract: The crystal structure of the title compound has been determined from three-dimensional X-ray diffraction data collected by precession methods; the co-ordination around the central Mo atom is pentagonal bipyramidal.

12 citations

Journal ArticleDOI
TL;DR: Magnetic susceptibilities of K3MoCl6 and RuCl3 were measured in the temperature range 76°-297°K as discussed by the authors, and the magnetic moments 3.83β and 2.07β were calculated for the ions Mo3+ and Ru3+, respectively.
Abstract: Magnetic susceptibilities of K3MoCl6 and RuCl3 were measured in the temperature range 76°—297°K. Curie's law is obeyed by both salts. The magnetic moments 3.83β and 2.07β are calculated for the ions Mo3+ and Ru3+, respectively.

12 citations