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Relevant bibliographies by topics / Organoiridium compounds. Transition metal hydrides

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Academic literature on the topic 'Organoiridium compounds. Transition metal hydrides'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Organoiridium compounds. Transition metal hydrides"

1

Bogdanović, Borislav, and Gary Sandrock. "Catalyzed Complex Metal Hydrides." MRS Bulletin 27, no. 9 (September 2002): 712–16. http://dx.doi.org/10.1557/mrs2002.227.

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AbstractComplex hydrides are mixed ionic–covalent compounds that can serve as reversible H2 storage media only when they are catalyzed by a transition metal such as Ti. As the prime example, the phenomenology of Ti-catalyzed sodium alanate (NaAlH4) is reviewed from a historical perspective. Dehydriding yields a theoretical 5.6 wt% H2 during two-step decomposition, NaAlH4 → Na3AlH6 → NaH + Al, although 100% recovery of that H2 is not currently possible. H2 can be discharged and recharged at practical rates at 125°C. More work is needed on the alanates, in particular, as well as the identification and optimization of the catalytic mechanism and a broad extension of the concept to other than Na-based alanates. The possibility of an even further extension of the concept to other complex hydrides (e.g., the borohydrides and transition-metal complexes) is discussed.

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Pal, Pratibha, Jyh-Ming Ting, Shivani Agarwal, Takayuki Ichikawa, and Ankur Jain. "The Catalytic Role of D-block Elements and Their Compounds for Improving Sorption Kinetics of Hydride Materials: A Review." Reactions 2, no. 3 (September 18, 2021): 333–64. http://dx.doi.org/10.3390/reactions2030022.

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The goal of finding efficient and safe hydrogen storage material motivated researchers to develop several materials to fulfil the demand of the U.S. Department of Energy (DOE). In the past few years, several metal hydrides, complex hydrides such as borohydrides and alanates, have been researched and found efficient due to their high gravimetric and volumetric density. However, the development of these materials is still limited by their high thermodynamic stability and sluggish kinetics. One of the methods to improve the kinetics is to use catalysts. Among the known catalysts for this purpose, transition metals and their compounds are known as the leading contender. The present article reviews the d-block transition metals including Ni, Co, V, Ti, Fe and Nb as catalysts to boost up the kinetics of several hydride systems. Various binary and ternary metal oxides, halides and their combinations, porous structured hybrid designs and metal-based Mxenes have been discussed as catalysts to enhance the de/rehydrogenation kinetics and cycling performance of hydrogen storage systems.

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Simagina, V. I., V. V. Litvak, I. V. Stoyanova, V. A. Yakovlev, V. M. Mastikhin, I. V. Afanasenkova, and V. A. Likholobov. "Low-temperature hydrodechlorination of 2,3-dichlorodibenzo-p-dioxin and chlorobenzene with hydrides catalyzed by transition metal compounds." Russian Chemical Bulletin 45, no. 6 (June 1996): 1321–24. http://dx.doi.org/10.1007/bf01434205.

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Liu, Yuchen, Djafar Chabane, and Omar Elkedim. "Intermetallic Compounds Synthesized by Mechanical Alloying for Solid-State Hydrogen Storage: A Review." Energies 14, no. 18 (September 13, 2021): 5758. http://dx.doi.org/10.3390/en14185758.

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Hydrogen energy is a very attractive option in dealing with the existing energy crisis. For the development of a hydrogen energy economy, hydrogen storage technology must be improved to over the storage limitations. Compared with traditional hydrogen storage technology, the prospect of hydrogen storage materials is broader. Among all types of hydrogen storage materials, solid hydrogen storage materials are most promising and have the most safety security. Solid hydrogen storage materials include high surface area physical adsorption materials and interstitial and non-interstitial hydrides. Among them, interstitial hydrides, also called intermetallic hydrides, are hydrides formed by transition metals or their alloys. The main alloy types are A2B, AB, AB2, AB3, A2B7, AB5, and BCC. A is a hydride that easily forms metal (such as Ti, V, Zr, and Y), while B is a non-hydride forming metal (such as Cr, Mn, and Fe). The development of intermetallic compounds as hydrogen storage materials is very attractive because their volumetric capacity is much higher (80–160 kgH2m−3) than the gaseous storage method and the liquid storage method in a cryogenic tank (40 and 71 kgH2m−3). Additionally, for hydrogen absorption and desorption reactions, the environmental requirements are lower than that of physical adsorption materials (ultra-low temperature) and the simplicity of the procedure is higher than that of non-interstitial hydrogen storage materials (multiple steps and a complex catalyst). In addition, there are abundant raw materials and diverse ingredients. For the synthesis and optimization of intermetallic compounds, in addition to traditional melting methods, mechanical alloying is a very important synthesis method, which has a unique synthesis mechanism and advantages. This review focuses on the application of mechanical alloying methods in the field of solid hydrogen storage materials.

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Enoki, Toshiaki, Seiichi Miyajima, Mizuka Sano, and Hiroo Inokuchi. "Hydrogen-alkali-metal-graphite ternary intercalation compounds." Journal of Materials Research 5, no. 2 (February 1990): 435–66. http://dx.doi.org/10.1557/jmr.1990.0435.

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Alkali-metal-graphite intercalation compounds (alkali-metal-GIC's) absorb hydrogen in two ways: physisorption and chemisorption. Hydrogen uptake through the physisorption process occurs at low temperatures below about 200 K in higher stage alkali-metal-GIC's, where hydrogen molecules are stabilized to form a two-dimensional condensed phase in the galleries of the graphite sheets. The concentration of absorbed hydrogen molecules is saturated at a rate of H2/alkali metal atom ∼2. The hydrogen physisorption shows a strong isotope effect and a swelling effect on c-axis lattice expansion. In the case of hydrogen uptake through the chemisorption process, dissociated hydrogen species are stabilized in the intercalate spaces. The activity of the chemisorption increases in the order Cs < Rb < K. The introduction of hydrogen generates a charge transfer from the host alkali metal GIC's to the hydrogen since hydrogen has strong electron affinity. The hydrogenated potassium-GIC's have intercalates consisting of K+-H−-K+ triple atomic layer sandwiches which are inserted between metallic graphite sheets. The inserted two-dimensional hydrogen layer is suggested to consist of H ions with a weakly metallic nature. The superconductivity of the hydrogenated potassium-GIC is also discussed in terms of the change in the electronic and lattice dynamical properties by hydrogen uptake. The hydrogen-absorption in alkali-metal-GIC's is an interesting phenomenon in comparison with that in transition metal hydrides from the point of hydrogen storage. The hydrogen-alkali-metal-ternary GIC's obtained from hydrogen absorption have novel electronic properties and lattice structures which provide attractive problems for GIC research. The studies of hydrogen-alkali-metal ternary GIC's are reviewed in this article.

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Stavila, Vitalie. "Structural features of metal dodecahydro-closo-dodecaborates." Acta Crystallographica Section A Foundations and Advances 70, a1 (August 5, 2014): C1026. http://dx.doi.org/10.1107/s2053273314089736.

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Metal dodecahydro-closo-dodecaborates have been recently explored as materials for hydrogen storage and as promising ionic conductors. However, their utility as hydrogen storage media is impeded by their high thermal stability, kinetic limitations, and side reactions. The high thermal and chemical stability of these materials makes them interesting for solid battery membrane applications, however more work is needed to understand the complicated phase transitions which occur in many metal dodecahydro-closo-dodecaborates. Recent literature suggests that dodecahydro-closo-dodecaborate species are formed as stable intermediates during the dehydrogenation of metal borohydrides [1]. This hypothesis is especially intriguing in the context of high thermal stability reported for compounds containing icosahedral dodecahydro-closo-dodecaborate anions in the presence of hydrogen gas [2]. Here, a series of multi-component alkali, alkaline-earth and transition metal [B12H12]2- compounds were isolated and characterized by single-crystal and powder X-ray diffraction techniques. Attempts to rehydrogenate M2B12H12 and MB12H12 (where M= alkali or alkaline-earth metal) in the presence of the metal hydrides we made, and several compounds were found to be susceptible to dehydrogenation/rehydrogenation reactions. In addition, selected M2B12H12 compounds were found to display high-temperature phases with increased values of alkali metal ionic conductivity.

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SIMAGINA, V. I., V. V. LITVAK, I. V. STOYANOVA, V. A. YAKOVLEV, V. M. MASTIKHIN, I. V. AFANASENKOVA, and V. A. LIKHOLOBOV. "ChemInform Abstract: Low-Temperature Hydrodechlorination of Chlorobenzene and 2,3- Dichlorobenzo-p-dioxin by Hydrides Catalyzed by Transition Metal Compounds." ChemInform 27, no. 49 (August 4, 2010): no. http://dx.doi.org/10.1002/chin.199649080.

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Jimenez-Izal, Elisa, and Anastassia N. Alexandrova. "σ-Aromaticity in polyhydride complexes of Ru, Ir, Os, and Pt." Physical Chemistry Chemical Physics 18, no. 17 (2016): 11644–52. http://dx.doi.org/10.1039/c5cp04330a.

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Transition-metal hydrides are essential for catalysis, organic synthesis, and hydrogen storage. In this work we study IrH₅(PPh₃)₂, (RuH₅(PⁱPr₃)₂)⁻, (OsH₅(PⁱPr₃)₂)⁻, and OsH₄(PPhMe₂)₃ polyhydride complexes, where the metal is five-fold coordinated in-plane. The unusual coordination of these compounds can be explained by σ-aromaticity.

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Gimferrer, Martí, Gerard Comas-Vilà, and Pedro Salvador. "Can We Safely Obtain Formal Oxidation States from Centroids of Localized Orbitals?" Molecules 25, no. 1 (January 6, 2020): 234. http://dx.doi.org/10.3390/molecules25010234.

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The use of centroids of localized orbitals as a method to derive oxidation states (OS) from first-principles is critically analyzed. We explore the performance of the closest-atom distance criterion to assign electrons for a number of challenging systems, including high-valent transition metal compounds, π-adducts, and transition metal (TM) carbenes. Here, we also introduce a mixed approach that combines the position of the centroids with Bader’s atomic basins as an alternative criterion for electron assignment. The closest-atom criterion performs reasonably well for the challenging systems, but wrongly considers O-H and N-H bonds as hydrides. The new criterion fixes this problem, but underperforms in the case of TM carbenes. Moreover, the OS assignment in dubious cases exhibit undesirable dependence on the particular choice for orbital localization.

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Dobrileit, R., and H. Züchner. "SIMS Investigations on the SmCo5Dnand LaNi5HnSystems." Zeitschrift für Naturforschung A 50, no. 6 (June 1, 1995): 533–38. http://dx.doi.org/10.1515/zna-1995-0604.

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Abstract Characteristic secondary ion emission patterns of several metal-hydrogen systems have been measured by SIMS to get information about the metal-hydrogen bonding and the structure of these systems. Results on SmCo5Dn and LaNi5Hn, and on H-D-loaded samples of the pure components are presented. The emission patterns of the secondary ions show a stronger bonding of hydrogen to Co and Ni than to Sm and La, although these transition metals, contrary to Sm or La, do not form stable hydrides under normal conditions. In these AB5-compounds the transition metal seems to be transformed to a "hydride forming material" due to the presence of the rare earth element. The secondary ion emission patterns of the hydrogen loaded intermetallics are explained and compared to those of the hydrogen loaded pure components.The similarity in the secondary ion emission patterns of the SmCo5Dn and LaNi5Hn systems points to a general characteristic of AB5Hn materials.

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Dissertations / Theses on the topic "Organoiridium compounds. Transition metal hydrides"

1

Matthews, Kelly E. "Elucidation of the aqueous equilibrium system of IrH₂(PMe₃)₃Cl and periodic trends of the iridium (III) dihydrido tris(trimethylphosphino) series, IrH₂(PMe₃)₃X." Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06062008-164037/.

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2

Bhattacharyya, Nripendra Kumar. "Preparation and characterization of binuclear carbonylates of the iron triad and tetranuclear carbonylates of iridium : the condensation of mononuclear hydrido carbonylates to trinuclear hybrido carbonylates of the iron triad /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487260135356797.

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3

Mellows, Heather. "Synthesis and properties of two fold symmetric ruthenium and rhodium dihydrogen-hydride complexes /." Thesis, Connect to this title online; UW restricted, 2000. http://hdl.handle.net/1773/8598.

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4

James, Alan Jay. "Metal thiazenes, bulky phosphines, group 11 acetylides and nickel acenaphthalenes /." free to MU campus, to others for purchase, 2002. http://wwwlib.umi.com/cr/mo/fullcit?p3074411.

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5

Smythe, Nicole. "Reactivity studies of platinum(IV) hydroxide and methoxide complexes and the study of pincer palladium(II) complexes as potential catalysts for olefin epoxidation /." Thesis, Connect to this title online; UW restricted, 2004. http://hdl.handle.net/1773/8618.

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6

Elalem, Nour-Eddine. "Insertion d'hydrures alcalins dans le graphite." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37613467p.

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7

AYADI, MOHAMED. "Contribution a l'etude de la dynamique de reseau de quelques composes de la serie de la mathlockite (pbfcl)." Université Louis Pasteur (Strasbourg) (1971-2008), 1986. http://www.theses.fr/1986STR13183.

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Etude de l'energie de cohesion de composes a structure de mathlockite; conditions de stabilite, expressions de la polarisation ionique, des constantes d'elasticite et des constantes dielectriques (modele de la coquille, presence de sites non centrosymetriques). Condition de synthese et de croissance cistalline de cahcl, bafcl, pbfcl et biocl; spectres raman et ir. Analyse des spectres de reflexion ir de bafcl (kramers-kronig et oscillateur classique). Determination de la densite d'etats et de la dispersion de phonons pour bafcl; calcul de certaines constantes d'elasticite

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8

"Base-promoted aryl carbon-halogen bond cleavages by Iridium (III) porphyrins." Thesis, 2011. http://library.cuhk.edu.hk/record=b6075157.

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Cheung, Chi Wai.
"December 2010."
Thesis (Ph.D.)--Chinese University of Hong Kong, 2011.
Includes bibliographical references.
Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.
Abstract also in Chinese.

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9

Pineda, Cedeno Leslie William. "Germanium-, Tin-, Lead-, and Bismuth-Containing β-Diketiminato Complexes for the Synthesis and Structural Characterization of Hydroxide, Carboxylic Acid, Heterobimetallic Oxide, Transition Metal-Main Group, Hydride and Halide Compounds." Doctoral thesis, 2006. http://hdl.handle.net/11858/00-1735-0000-0006-B0D1-0.

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Book chapters on the topic "Organoiridium compounds. Transition metal hydrides"

1

Yamaguchi, M. "From Transition Metal Hydrides and Triorganogallium Complexes." In Compounds of Groups 13 and 2 (Al, Ga, In, Tl, Be...Ba), 1. Georg Thieme Verlag KG, 2004. http://dx.doi.org/10.1055/sos-sd-007-00256.

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2

O'Connor, J. M. "Dienyl Hydrides from Protonation at Iridium." In Compounds with Transition Metal-Carbon pi-Bonds and Compounds of Groups 10-8 (Ni, Pd, Pt, Co, Rh, Ir, Fe, Ru, Os), 1. Georg Thieme Verlag KG, 2001. http://dx.doi.org/10.1055/sos-sd-001-00536.

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O'Connor, J. M. "Dienyl Hydrides from Borohydride and (Dienyl)iridium Halides." In Compounds with Transition Metal-Carbon pi-Bonds and Compounds of Groups 10-8 (Ni, Pd, Pt, Co, Rh, Ir, Fe, Ru, Os), 1. Georg Thieme Verlag KG, 2001. http://dx.doi.org/10.1055/sos-sd-001-00532.

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4

Ogawa, A., and T. Hirao. "Allylplatinum Complexes by Addition of Platinum(II) Hydrides to Unsaturated Bonds." In Compounds with Transition Metal-Carbon pi-Bonds and Compounds of Groups 10-8 (Ni, Pd, Pt, Co, Rh, Ir, Fe, Ru, Os), 1. Georg Thieme Verlag KG, 2001. http://dx.doi.org/10.1055/sos-sd-001-00298.

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O'Connor, J. M. "Dienyl Hydrides from Reaction of Dienyl Halides and Zinc/Acetic Acid." In Compounds with Transition Metal-Carbon pi-Bonds and Compounds of Groups 10-8 (Ni, Pd, Pt, Co, Rh, Ir, Fe, Ru, Os), 1. Georg Thieme Verlag KG, 2001. http://dx.doi.org/10.1055/sos-sd-001-00533.

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