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Manganese Catalysis in Organic Synthesis
Manganese Catalysis in Organic Synthesis A must-read reference for anyone interested in catalyst design and sustainable organic synthesis In Manganese Catalysis in Organic Synthesis, distinguished researcher Jean-Baptiste Sortais delivers an insightful and robust overview of the use of manganese in homogenous catalysis.The editor includes papers from authoritative academics describing the organometallic precursors used to develop manganese catalysts and covers critical applications in organic synthesis, including reduction to oxidation reactions, C-C, C-N, C-X bond formation reactions, cross-coupling reactions, C-H bond activation to dihydroxylation and epoxidation reactions. Manganese Catalysis in Organic Synthesis is a practical resource for every organic chemist in academia and industry with an interest in non-noble metal catalysis, organic synthesis, and sustainable chemistry.It is intuitively and clearly organized, covering the most important synthetic procedures using homogenous manganese catalysts.It is also the ideal companion to works like Cobalt Catalysis in Organic Synthesis, Nickel Catalysis in Organic Synthesis, and Iron Complexes in Catalysis.Readers will also enjoy: Thorough introductions to organometallic manganese compounds in organic synthesis and manganese-catalyzed hydrogenation and hydrogen transfer reactionsA comprehensive exploration of manganese-catalyzed hydrogen borrowing reactions and dehydrogenative coupling reactionsPractical discussions of manganese-catalyzed hydrosilylation and hydroboration reactions and manganese-catalyzed electro- and photocatalysis transformationsIn-depth examinations of manganese-catalyzed C-H oxygenation reactions and manganese-catalyzed organometallic C-H activationInsightful treatments of manganese-catalyzed cross-coupling processes and manganese(III) acetate mediated cyclizations Perfect for catalytic, organic, and pharmaceutical chemists, Manganese Catalysis in Organic Synthesis deserves a place in the libraries of researchers and professionals interested in catalyst design and sustainable organic synthesis.
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Rocol Foliac Manganese Steamseal PJC
ROCOL STEAMSEAL PJC is an excellent pipe sealant primarily used in plumbing and industrial application for pipes, flanges and face joints. Its graphite and manganese compound provides efficient sealing for ferrous pipework. Hard-setting but flexible to resist vibration, thermal expansion and contraction of pipework. Joints sealed with STEAMSEAL are easy to break and clean. High pressure sealing capability, up to 193 bar (2800 psi). Specification Temperature Range: -20°C to 600°CAdditional Information:• Sundries Type: Sealant• Size (g): 400
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Manganese Ores of Supergene Zone: Geochemistry of Formation
The significance of manganese ores is very weil known in cast iron and steel production, as weil as in various types of chemical raw material and agricultural fertilizers.The world industry development in recent years requires their increased production in the vicinity of the metallurgical centers in different regions of the world; high grade manganese and associated metalores are needed.Analysis of the world production and consumption of manganese ores by industrial countries indicates convincingly that the highest commercial value belongs to the ores associated with the supergene zone (National Minerals Advi- sory Board, 1981; Coffman and Palencia, 1984; Doncoisne, 1985; Iones, 1990, 1991; Manganese, 1990; McMichael, 1989).The remarkable property of manganese, in contrast to many other types of mineral resources, is that the ore accumulations of this metal are distributed in the wide geochrono- logical interval from the Archean to the present time; these ores are deposited in basins and supergene environments of different types from lakes, internal seas to pelagic and abyssal regions of the World ocean, as weIl as different types of weathering crusts and karst. At the same time the manganese accumulations and features of their mineral and chemical compositions are relatively sensitive indicators, reflecting facies and geodynamic condi- tions of their formation.These properties aid the investigation of the Earth's evolution processes.
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Application of Manganese Pincer Complexes for Hydrogenation and Dehydrogenation Reactions
On the way towards sustainable and green chemistry, scientists found a key technology which allows chemical transformations to proceed with minimum waste generation and energy consumption.The key is transition metal catalysis which is also attractive from an economical point of view.At the end of 19th century, Alfred Werner defined basics of coordination chemistry which were significant for the development of transition metal catalysis.In the 1930s, the Oxo Process, in which olefins react with syngas to produce linear and branched aldehydes, was developed by Otto Roelen.The reaction is still widely used and allows to produce millions metric tons of oxo chemicals.A following milestone in transition metal catalysis occurred in the 1950s when the Wacker Process was developed.The reaction allows to oxidize olefins to aldehydes and ketones with the use of PdCl2 as catalyst.Many other reactions were developed involving transition metal catalysis, including important processes such as C-C bond formations, site selective C-H bond activation, arylation of amines and alcohols and others which have been also applied in industrial processes to obtain bulk chemicals, fine chemicals and polymers.Another indicator highlighting the importance of homogeneous transition metal catalysis is the acknowledgement by the Noble Prize committee.Thus, in 2001, the Nobel Prize in chemistry was awarded jointly to William S.Knowles, Ryoji Noyori and K. Barry Sharpless for their work on transition metal catalysed asymmetric hydrogenation and oxidation reactions.Later in 2005, Yves 0Chauvin, Robert H. Grubbs and Richard R. Schrock were selected for the Noble Prize in chemistry for their work on the development of the metathesis reaction in organic synthesis. And finally, recent Noble Prize in chemistry in 2010 was awarded to Richard F.Heck, Ei-ichi Negishi and Akira Suzuki for palladium-catalysed cross coupling reactions in organic synthesis.Until recently, reports featuring homogeneous transition metal catalysis were focused on using rare and expensive metals.The application of noble metals raises major concern, as they are toxic and consequently they produce toxic waste. And to their low availability (listed as critical raw materials for European Union), noble metals require difficult extraction from the Earth’s crust.
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Are manganese ions pink or colorless?
Manganese ions are typically colorless in aqueous solutions. However, in certain cases, manganese ions can exhibit a pink color when they form complexes with other ligands. This pink color is due to the absorption of certain wavelengths of light by the complex formed between manganese ions and the ligands.
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What is the mass of manganese?
The mass of manganese is approximately 54.94 atomic mass units (amu). This is the average atomic mass of a manganese atom, taking into account the different isotopes of manganese and their relative abundance. Manganese is a transition metal with the atomic number 25, and it is commonly used in steel production, batteries, and other industrial applications.
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What are the electron configurations of manganese?
The electron configuration of manganese is 1s2 2s2 2p6 3s2 3p6 4s2 3d5. This configuration indicates that manganese has 25 electrons, with 2 in the 1s orbital, 2 in the 2s orbital, 6 in the 2p orbital, 2 in the 3s orbital, 6 in the 3p orbital, 2 in the 4s orbital, and 5 in the 3d orbital. This configuration places manganese in the transition metal block of the periodic table.
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GP Batteries Lithium CR2450 Single-use battery Lithium-Manganese Dioxi
GP Batteries Lithium CR2450 Single-use battery Lithium-Manganese Dioxide (LiMnO2)
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GP Batteries Lithium CR2 Single-use battery Lithium-Manganese Dioxide
GP Batteries Lithium CR2 Single-use battery Lithium-Manganese Dioxide (LiMnO2)
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GP Batteries Lithium CR1620 Single-use battery Lithium-Manganese Dioxi
GP Batteries Lithium CR1620 Single-use battery Lithium-Manganese Dioxide (LiMnO2)
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GP Batteries Lithium CR2032 Single-use battery Lithium-Manganese Dioxi
GP Batteries Lithium CR2032 Single-use battery Lithium-Manganese Dioxide (LiMnO2)
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What is the electron configuration of manganese?
The electron configuration of manganese is [Ar] 3d5 4s2. This means that manganese has a total of 25 electrons, with 5 electrons in the 3d orbital and 2 electrons in the 4s orbital. The [Ar] represents the electron configuration of argon, which is the noble gas that comes before manganese in the periodic table.
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How do you calculate the decomposition of hydrogen peroxide by manganese(IV) oxide and the amount of manganese reacted?
To calculate the decomposition of hydrogen peroxide by manganese(IV) oxide and the amount of manganese reacted, you can use the stoichiometry of the reaction. The balanced chemical equation for the reaction is 2 H2O2 + MnO2 -> 2 H2O + O2 + Mn. From this equation, you can determine the mole ratio between hydrogen peroxide and manganese dioxide. Then, using the amount of hydrogen peroxide reacted, you can calculate the amount of manganese reacted based on the mole ratio.
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What is manganese phosphate and is it harmful?
Manganese phosphate is a type of conversion coating used to treat metal surfaces for corrosion protection and lubrication enhancement. It involves a chemical reaction between the metal surface and a manganese phosphate solution, resulting in the formation of a layer of manganese phosphate crystals on the surface. While manganese phosphate itself is not considered harmful, the process of applying it can involve the use of chemicals that may be toxic or hazardous if not handled properly. It is important to follow safety guidelines and use proper protective equipment when working with manganese phosphate.
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Does tannic acid react with manganese-chromium steel?
Tannic acid does not react with manganese-chromium steel. Manganese-chromium steel is a type of stainless steel that is highly resistant to corrosion and oxidation, and tannic acid does not have the ability to corrode or degrade this type of steel. Therefore, tannic acid can be safely used with manganese-chromium steel without causing any chemical reactions or damage to the steel.
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