Download or read book Synthetic Molybdenum iron sulfur cubane Cluster Complexes written by Thomas E. Wolff and published by . This book was released on 1980 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Synthesis and Characterization of a Novel Molybdenum iron sulfur Cluster written by Paul Ernest Lamberty and published by . This book was released on 1983 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Synthesis Characterization and Reactivity of Iron sulfur and Molybdenum iron sulfur Complexes with Phenoxide Terminal Ligands written by Walter Edward Cleland (Jr.) and published by . This book was released on 1984 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Synthesis Characterization and Reactivity of Molybdenum and Tungsten Iron Sulfur Complexes written by Harry Craig Silvis and published by . This book was released on 1981 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book SULFIDE COUPLING REACTIONS IN THE SYNTHESIS OF NEW IRON SULFUR AND IRON MOLYBDENUM SULFUR COMPLEXES MOLYBDENUM written by PAUL RICHARD CHALLEN and published by . This book was released on 1990 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: The relevance of the above clusters to the nitrogenase enzyme system is discussed.
Download or read book The Synthesis and Characterization of the Molybdenum iron sulfur Clusters S2MoS2FeL2 2 S2MoS2FeS2FeL2 3 and S2MoS2FeS2FeS2MoS2 4 written by Robert Hugo Tieckelmann and published by . This book was released on 1981 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Density Functional Methods for Iron sulfur Clusters written by Travis Victor Harris and published by . This book was released on 2011 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: Iron-sulfur proteins are found in all forms of life, performing key functions in many of the most important biological processes, such as nitrogen fixation, respiration, DNA repair, and photosynthesis. The functional centers of these metalloproteins are iron-sulfur clusters, which are efficient electron-transfer agents, and provide a range of other functions, from catalysis to iron sensing. The main focus of this dissertation is to eliminate the structural uncertainties of one of the most complex iron-sulfur clusters, the iron-molybdenum cofactor of nitrogenase. The long-term goal of nitrogenase research is to understand all of the molecular-level details that enable biological nitrogen fixation, which may lead to alternatives to the fossil fuel-reliant, high temperature and pressure Haber-Bosch process for industrial nitrogen fixation. The research presented here is all based on computational chemistry, using primarily density functional theory with comprehensive experimental support from the literature. Computational chemistry can help explain experimental findings, and it can be used to probe structural and mechanistic details that cannot be observed through experiment; however, methods for theoretical modeling of iron-sulfur clusters must be developed before accurate results can be obtained. In this work, the best available methods (functionals, basis sets, and population analyses) are developed by comparing calculated properties of a series of model iron-sulfur complexes with experimental reference data. The newly recommended methods are then applied to a protein-embedded cluster, and the effects of the network of hydrogen bonds, dipoles, and electrostatic interactions are systematically probed. In addition to new insights regarding the role of the protein in tuning iron-sulfur cluster properties, an algorithm is derived for constructing computational models that capture all significant environmental effects. Future work will benefit from the foundations developed in these first two studies. The final work is a computational evaluation of the uncertain composition, charge, magnetic structure, and protonation state of the iron-molybdenum cofactor, based on a series of criteria defined by all available experimental data. The results show that the [Mo IV -2Fe II -5Fe III -9S 2- -C 4-] composition with hydroxyl-protonated homocitrate ligand is favored over the [Mo IV -4Fe II -3Fe III -9S 2- -N 3-] composition preferred in the literature, adding new context to the many proposed mechanisms for biological nitrogen fixation.
Download or read book I Oxygen Atom Transfer Reactions of Molybdenum Complexes II Sulfur oxygen Complexes of Macrocyclic Iron II III III Hexanuclear Iron sulfur Basket Clusters written by Martha Susan Reynolds and published by . This book was released on 1988 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molybdenum Chemistry of Biological Significance written by William E. Newton and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: In retrospect, it was obvious that we were both, quite inde pendently, contemplating a conference on the role of molybdenum in biology and related chemistry. At the time though, the meeting of minds on this matter was quite surprising. Although this subject has been treated in previous meetings within the overall context of, say, magnetic resonance or nitrogen fixation, it was apparent to us both that research in molybdenum-containing enzymes and molyb denum chemistry had progressed rapidly in the last several years. Jointly, we decided to organize the first meeting on Molybdenum Chemistry of Biological Significance which was held at the Hotel Lake Biwa, Shiga, Japan, on April 10-13, 1979. This volume con stitutes the Proceedings of that international conference and covers the broad spectrum of interests from enzymes to coordination chemistry. It should serve not only as a source of new information on the latest research results in this area and as a useful ref erence tool, but should also allow a newcomer or other peripherally interested researcher to become conversant very rapidly with the "state-of-the-art" in this specialized and important area of research. The conference was sponsored by the Japan Society for the Promotion of Science, the Japan World Exposition Commemerative Fund the Yamada Science Foundation, the Nissan Science Foundation, the Chemical Society of Japan (Kinki Regional Office) and the Agri cultural Chemical Society of Japan (Kansai Branch). We thank these organizations sincerely for their interest and generosity.
Download or read book Iron Sulfur Clusters in Chemistry and Biology written by Tracey Rouault and published by Walter de Gruyter GmbH & Co KG. This book was released on 2014-08-20 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume on iron-sulfur proteins includes chapters that describe the initial discovery of iron-sulfur proteins in the 1960s to elucidation of the roles of iron sulfur clusters as prosthetic groups of enzymes, such as the citric acid cycle enzyme, aconitase, and numerous other proteins, ranging from nitrogenase to DNA repair proteins. The capacity of iron sulfur clusters to accept and delocalize single electrons is explained by basic chemical principles, which illustrate why iron sulfur proteins are uniquely suitable for electron transport and other activities. Techniques used for detection and stabilization of iron-sulfur clusters, including EPR and Mossbauer spectroscopies, are discussed because they are important for characterizing unrecognized and elusive iron sulfur proteins. Recent insights into how nitrogenase works have arisen from multiple advances, described here, including studies of high-resolution crystal structures. Numerous chapters discuss how microbes, plants, and animals synthesize these complex prosthetic groups, and why it is important to understand the chemistry and biogenesis of iron sulfur proteins. In addition to their vital importance in mitochondrial respiration, numerous iron sulfur proteins are important in maintenance of DNA integrity. Multiple rare human diseases with different clinical presentations are caused by mutations of genes in the iron sulfur cluster biogenesis pathway. Understanding iron sulfur proteins is important for understanding a rapidly expanding group of metabolic pathways important in all kingdoms of life, and for understanding processes ranging from nitrogen fixation to human disease.
Download or read book Molybdenum and Molybdenum Containing Enzymes written by Michael P. Coughlan and published by Elsevier. This book was released on 2014-06-28 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molybdenum and Molybdenum-Containing Enzymes is a collection of papers that deals with the various concerns with molybdenum-containing enzymes. The text first covers the organometallic chemistry of molybdenum, and then proceeds to tackling molybdenum-containing enzymes, such as xanthine oxidase, aldehyde oxidase, and sulphite oxidase. The text also discusses the advancement in the understanding of molybdenum-containing enzymes. The remaining chapters deal with the genetics of molybdoenzymes and the nutritional aspects of molybdenum. The book will be of great use to students, researchers, and practitioners of biochemistry.
Download or read book Vanadium iron sulfur and Molybdenum iron sulfur Cluster Chemistry written by Julia A. Kovacs and published by . This book was released on 1986 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electroreactivity of Iron molybdenum sulfur Cubane Cluster Complexes written by Dante Joseph Rutstrom and published by . This book was released on 1985 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transition Metals in Catalysis written by Silke Leimkühler and published by MDPI. This book was released on 2021-03-10 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Iron–sulfur (FeS) centers are essential protein cofactors in all forms of life. They are involved in many key biological processes. In particular, Fe-S centers not only serve as enzyme cofactors in catalysis and electron transfer, they are also indispensable for the biosynthesis of complex metal-containing cofactors. Among these cofactors are the molybdenum (Moco) and tungsten (Wco) cofactors. Both Moco/Wco biosynthesis and Fe-S cluster assembly are highly conserved among all kingdoms of life. After formation, Fe-S clusters are transferred to carrier proteins, which insert them into recipient apo-proteins. Moco/Wco cofactors are composed of a tricyclic pterin compound, with the metal coordinated to its unique dithiolene group. Moco/Wco biosynthesis starts with an Fe-S cluster-dependent step involving radical/S-adenosylmethionine (SAM) chemistry. The current lack of knowledge of the connection of the assembly/biosynthesis of complex metal-containing cofactors is due to the sheer complexity of their synthesis with regard to both the (genetic) regulation and (chemical) metal center assembly. Studies on these metal-cofactors/cofactor-containing enzymes are important for understanding fundamental cellular processes. They will also provide a comprehensive view of the complex biosynthesis and the catalytic mechanism of metalloenzymes that underlie metal-related human diseases.
Download or read book TRANSITION METALS AND SULFUR written by and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Syntheses and Characterization of Organometallic Molybdenum iron sulfur Clusters written by Brett A. Cowans and published by . This book was released on 1986 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molybdenum written by E.R. Braithwaite and published by Elsevier. This book was released on 2013-10-22 with total page 681 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molybdenum is an element with an extremely rich and interesting chemistry having very versatile applications in various fields of human activity. It is used extensively in metallurgical applications. Because of their anti-wear properties, molybdenum compounds find wide applications as lubricants - particularly in extreme or hostile environmental situations. Many molybdates and heteropolymolybdates are white and therefore used as pigments. In addition, they are non-toxic and act as efficient corrosion inhibitors and smoke suppressants. Hydroprocessing of petroleum is one of the largest industries employing heterogeneous catalysts. Molybdenum catalysts have shown great promise in the liquefaction of coal and this may develop into one of its most important catalytic uses. The use of molybdenum compounds in homogeneous catalysis is also significant. Three important classes of molybdenum compounds in the solid state are reviewed, viz., oxides, sulphides and halides. The role of molybdenum in inorganic catalysis and enzymes receives prominent mention because of their impact on the progress of science and technology. Further biochemical and enzymic factors are discussed in separate chapters and their reaction to agriculture and animal husbandry. A new classification of covalent compounds which abandons the traditional oxidation state concept allows a powerful approach to the organisation of the complex and rich chemistry of molybdenum. Dramatic colour diagrams of abundances of molybdenum compounds provide broad insights into the important features and trends in the chemistry of molybdenum including reactivity and mechanism. The book is intended for use mainly as a research monograph by the many workers who may encounter molybdenum chemistry or who are looking for its application and potential uses in different technological fields. However, it will also serve as an advanced text for university lecturers and postgraduate students interested in inorganic, physical and industrial chemistry, chemical technology or biochemistry and biotechnology.
