Relevant bibliographies by topics / Magnesium bromure

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  3. Book chapters

Academic literature on the topic 'Magnesium bromure'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Magnesium bromure"

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&NA;. "Magnesium sulfate/rocuronium bromide/pancuronium bromide." Reactions Weekly &NA;, no. 1050 (May 2005): 14. http://dx.doi.org/10.2165/00128415-200510500-00042.

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Yunita, Fariza Eka, Eko Sulistiyono, Nadia Chrisayu Natasha, Ahmad Rizky Rhamdani, Florentinus Firdiyono, Latifa Hanum Lalasari, Tri Arini, Enggar Setya Widyaningrum, and Erlina Yustanti. "Investigation of surfactant effect during synthesis of magnesium oxide nanoparticles from bittern using ultrasonic destruction process." Eastern-European Journal of Enterprise Technologies 3, no. 5 (111) (June 25, 2021): 6–12. http://dx.doi.org/10.15587/1729-4061.2021.229908.

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Magnesium oxide (MgO) nanoparticles have been widely used in a variety of applications because of their good surface reactivity. Magnesium oxide from bittern has a larger surface area compared to magnesium oxide from calcined magnesite and magnesium ions precipitation from bittern using sodium hydroxide has higher purity than using calcium hydroxide or ammonium hydroxide. In this research, sodium hydroxide was added to a bittern solution obtaining magnesium hydroxide precipitate, followed by the calcination process to produce magnesium oxide. Nano magnesium oxide was synthesized by the ultrasonic destruction process using ethanol and 2-propanol as media. In this study, sonication time and particle concentration effect on the ultrasonic destruction process were investigated. During the process, the sonication time was varied between 8, 16, 32, 64, and 128 minutes while the magnesium oxide concentration was varied between 1 %, 2 %, and 3 %. Increasing sonication time and particle concentration will decrease the particle size. The previous study shows that particles with very small sizes tend to have an agglomeration effect. The aim of this work is to optimize nano magnesium oxide production from bittern. Surfactant addition was also studied to prevent agglomeration between particles. Four types of surfactant namely anionic (sodium lauryl sulfate), cationic (cetyl tri-methyl-ammonium bromide), amphoteric (fatty acid amido alkyl betaine), and non-ionic (nonylphenol 10 ethoxylated) with a concentration of 1 % and a volume of 0.125 ml were added during the second ultrasonic destruction process. All types of surfactants have a positive effect to prevent agglomeration during the ultrasonic destruction process, with the amphoteric surfactant having the highest performance
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Wang, Chao, Yunxian Liu, Xin Chen, Pin Lv, Hairui Sun, and Xiaobing Liu. "Pressure-induced unexpected −2 oxidation states of bromine and superconductivity in magnesium bromide." Physical Chemistry Chemical Physics 22, no. 5 (2020): 3066–72. http://dx.doi.org/10.1039/c9cp05627k.

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Upon compression, three unusual stoichiometries are predicted. The Br exhibits an oxidation state of −2 in I4/mmm Mg4Br and Pm3̄m MgBr phases. Moreover, the I4/mmm Mg4Br behave as a typical electride and P21/m-MgBr3 is predicted as superconductor.
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Mojtahedi, Mohammad M., M. Saeed Abaee, and Hassan Abbasi. "One-pot, solvent-free synthesis of α-aminonitriles under catalysis by magnesium bromide ethyl etherate." Canadian Journal of Chemistry 84, no. 3 (March 1, 2006): 429–32. http://dx.doi.org/10.1139/v06-024.

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A three-component, efficient, and facile procedure has been developed for the synthesis of α-aminonitriles from aldehydes, amines, and trimethylsilyl cyanide using a catalytic amount of magnesium bromide ethyl etherate in the absence of solvent. Rapid formation of products is observed at room temperature in a one-pot procedure under very mild conditions giving excellent yields of the title compounds.Key words: catalyzed Strecker's reaction, α-aminonitriles, magnesium bromide, solvent-free.
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Pansare, Sunil V., Mahesh G. Malusare, and Anand N. Rai. "Magnesium Bromide Catalysed Acylation of Alcohols." Synthetic Communications 30, no. 14 (July 2000): 2587–92. http://dx.doi.org/10.1080/00397910008087423.

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Mantey, Steffen, Cornelius Liebenow, and Elmar Hecht. "Crystal Structure of Tetraethyleneglycoldimethylether Magnesium Bromide." Zeitschrift für anorganische und allgemeine Chemie 627, no. 2 (February 2001): 128–30. http://dx.doi.org/10.1002/1521-3749(200102)627:2<128::aid-zaac128>3.0.co;2-c.

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Garst, John F., Kathryn Easton Lawrence, Rajnish Batlaw, J. Ronald Boone, and Ferenc Ungváry. "Magnesium bromide in Grignard reagent formation." Inorganica Chimica Acta 222, no. 1-2 (July 1994): 365–75. http://dx.doi.org/10.1016/0020-1693(94)03928-3.

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Chung, W. S., W. Y. Yoon, and Kwang Jin Kim. "Corrosion Characteristics of Surface-Modified DET Magnesium Powders." Materials Science Forum 449-452 (March 2004): 369–72. http://dx.doi.org/10.4028/www.scientific.net/msf.449-452.369.

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Magnesium powders having inactive surface layer have been processed easily and intentionally by DET under fluoride, chromate, and bromide salt. The modified surfaces play an important role in preventing contact with active environments to improve corrosion resistance of Magnesium powders; the image of the surface modified powders was observed using SEM. The composition distribution and characteristics was determined and analyzed by using XRD, XPS, and EIS. Compared with bare Magnesium, the Magnesium having chromate modified surface layer showed a more passive behavior such as smaller current density and nobler potential in 4wt% NaCl solution.
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Wieser, Michael E., Norman Holden, Tyler B. Coplen, John K. Böhlke, Michael Berglund, Willi A. Brand, Paul De Bièvre, et al. "Atomic weights of the elements 2011 (IUPAC Technical Report)." Pure and Applied Chemistry 85, no. 5 (April 30, 2013): 1047–78. http://dx.doi.org/10.1351/pac-rep-13-03-02.

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The biennial review of atomic-weight determinations and other cognate data has resulted in changes for the standard atomic weights of five elements. The atomic weight of bromine has changed from 79.904(1) to the interval [79.901, 79.907], germanium from 72.63(1) to 72.630(8), indium from 114.818(3) to 114.818(1), magnesium from 24.3050(6) to the interval [24.304, 24.307], and mercury from 200.59(2) to 200.592(3). For bromine and magnesium, assignment of intervals for the new standard atomic weights reflects the common occurrence of variations in the atomic weights of those elements in normal terrestrial materials.
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Wilbrink, Jonathan L., Chia-Ching Huang, Katerina Dohnalova, and Jos M. J. Paulusse. "Critical assessment of wet-chemical oxidation synthesis of silicon quantum dots." Faraday Discussions 222 (2020): 149–65. http://dx.doi.org/10.1039/c9fd00099b.

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Dissertations / Theses on the topic "Magnesium bromure"

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Hernandez, Laura. "Simulations numériques par méthode de Monte Carlo des transitions de phase dans les antiferromagnétiques anisotropes purs et dilués : FeCl2, FeBr2, FexMg1-xCl2." Toulouse, INSA, 1993. http://www.theses.fr/1993ISAT0006.

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L'interet de l'etude des systemes antiferromagnetiques tres anisotropes s'est sans cesse renouvele au cours des dernieres annees. Soumis a un champ magnetique, les systemes purs presentent un comportement tricritique et les systemes dilues sont une realisation physique du modele d'ising en champ aleatoire. Notre travail comporte deux parties. Dans la premiere, nous utilisons une simulation de monte carlo avec un modele qui prend en compte les caracteristiques essentielles de ces systemes. L'anisotropie, les interactions frustrees et en competition ont ete prises en compte pour chaque reseau. Pour fecl#2, un excellent accord quantitatif est trouve entre la valeur calculee du rapport de la temperature tricritique et de la temperature de neel et sa mesure experimentale. Pour febr#2, nos resultats montrent le caractere non ising de ce compose. Dans la seconde partie, nous appliquons notre modele au systeme dilue fe#xmg#1##xcl#2. Nous avons realise une etude systematique pour x=0. 9, 0. 8 et 0. 7. Des simulations de refroidissement (fc) et rechauffement (fh) sous champ et de montees et descentes de champ ont ete effectuees. Des irreversibilites dans les cycles fh-fc ont ete trouvees en accord avec l'experience. La forme des domaines magnetiques associes a ete etudiee. Nous montrons l'existence d'un point tricritique et son evolution avec la concentration. Enfin, nous avons analyse la possibilite de l'existence d'une phase verre de spin, a tres basse temperature et haut champ: nous montrons qu'aucune ligne critique n'existe pas dans cette region
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Yahiaoui, Mohamed. "ETUDE DU DIAGRAMME DE PHASE ET DU COMPORTEMENT VERRE DE SPIN DU SYSTEME ISOLANT DILUE FexMg1-xBr2." Toulouse, INSA, 1988. http://www.theses.fr/1988ISAT0014.

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Etude par mesures de susceptibilite magnetique et d'aimantation du systeme du titre. Ce compose stratifie est un systeme d'ising 3d. On etudie le diagramme de phase et on met un comportement de verre de spin. Pour x=0,72, les mesures montrent l'importance du comportement reentrant. L'analyse du comportement critique pour x=0,35 est analyse par l'etude de l'aimantation non lineaire. Mise en evidence d'une transition de phase. Valeur des exposants critiques. On compare ensuite le comportement avec celui des systemes bidimensionnels d'ising
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Laboue, Blandine. "Preparation de cetones par acylation de composes organomanganeux : extension et amelioration de la methode." Paris 6, 1987. http://www.theses.fr/1987PA066464.

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Preparation des cetones acetyleniques fonctionnelles et de divers alcools tertiaires par acylation des composes organomagnesiens en presence de sels de manganese seuls ou associes a des sels de cuivre
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Rauhut, Christian Bernhard. "Preparation of Functionalized Organomagnesium Reagents by ortho-Magnesiation, Sulfoxide-, Iodine- and Bromine-Magnesium Exchange Reactions." Diss., lmu, 2008. http://nbn-resolving.de/urn:nbn:de:bvb:19-95656.

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Pouget, Stéphanie. "Contribution à l'étude de l'influence de la dilution sur les propriétés magnétiques de composés isolants frustrés." Toulouse, INSA, 1993. http://www.theses.fr/1993ISAT0039.

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Nous avons principalement etudie le systeme ferromagnetique heisenberg-3d frustre cdcr#2#(#1##x#)in#2#xs#4, dans la limite des faibles dilutions x. La structure des phases ferromagnetiques et verre de spin reentrante a ete exploree par diffraction de neutrons et mesures d'aimantation macroscopiques. Les resultats s'interpretent dans le cadre d'un modele inhomogene du systeme de spins. Par diffusion de neutrons aux petits angles, spectrometries trois-axes et d'echo de spin, nous avons caracterise le comportement critique statique et dynamique des composes x=0 et 0. 05. Cette etude a revele la pertinence de la dilution et ainsi un des effets de la frustration qui est de porter le systeme dans la limite des forts desordres. Nos resultats suggerent l'existence de deux comportements statiques differents du compose cdcr#1#. #9in#0#. #1s#4, de part et d'autre de t#c, concernant la dynamique, nous avons mis en evidence une evolution non monotone du temps de relaxation en fonction du moment transfere, pour des valeurs de celui-ci tres inferieures a l'inverse de la longueur de correlation, et voisines de l'inverse de la distance moyenne entre impuretes in#3#+. La derniere partie de ce travail est consacree au systeme frustre ising-3d fe#1##xmg#xbr#2. Les mesures de la dispersion des ondes de spin pour differentes directions du moment transfere nous ont permis de preciser le modele des interactions d'echange pour le compose febr#2. Nous avons etudie la transition de phase para-antiferromagnetique pour les deux valeurs de la dilution x=0 et 0. 1. Les resultats sont interpretes dans le cadre d'une theorie classique de champ moyen
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Youssefi, Mohammad. "Recherche de nouvelles synthèses de sélénophosphonates : Préparation et étude de la réactivité d'ène-phosphoramides fonctionnels." Nancy 1, 1986. http://www.theses.fr/1986NAN10105.

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La recherche d'une méthode de synthèse de phénylséléno phosphate d'alkyle (RO)::(2)P(O)CH::(2)SePh a permis de trouver un nouveau réactif de Grignard (ETO)::(2)P(O)CH::(2)MGCL. Les propriétés de ce nouveau réactif ont été étudiées et comparées à celles des autres organométalliques correspondants connus lithiens et cuivreux. Ce réactif de Grignard conduit à une synthèse originale de sélénophosphonates. Utilisation des phosphates d'alkyle comme agents d'alkylation pour la synthèse de dithioesters. Des énephosphoramides fonctionnels ont été obtenus pour la première fois et la réactivité carbonique de l'un d'entre eux a été étudiée
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Huang, Jui-wen, and 黃瑞雯. "Magnesium Bromide Promoted Barbier Type Intramolecular Cyclization of Halo Substituted Acetals, Ketals and Orthoesters." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/21172945419125428284.

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碩士
國立臺灣大學
化學系
86
We used magnesium bromide as Lewis acid and ether as solvent to promote intramolecular Barbier type reactions of halo substituted acetals, ketals, orthoesters and thioketal. Under the reaction conditions, the halo substituted acetals and ketals give the corresponding dioxolane ring-opening products. For example, 2-(4-chlorobutyl)-2-methyl-1,3-dioxolane would proceed intramolecular Barbier type reaction to give 2-(1-methylcyclo- pentyloxy)ethanol. Whereas, the orthoester compounds, would give the corresponding spiro-cyclic products. For example, 1-(2- bromoethyl)-4-methyl-2,6,7-trioxabicyclo[2.2.2]octane would react to give (6-methyl-4,8-dioxaspiro[2.5]oct-6-yl)methanol. In addition, reaction of vinyl Grignard reagents of acetals and ketals would give exocyclic olefins. For example, reaction of 2-(3-bromo-3-butyl)-2- phenyl-1,3-dioxolane would give 2-(1-phenyl-2-methylene- cyclobutyl-1-oxy)ethanol. On the other hand, the Barbier type reaction of 2-(4-bromoethyl)-2-phenyl-1,3-oxathiolane gives 2-(1- phenylcyclopropoxyl)ethanethiol as the cyclization product. However, we got an elimination product from 6-bromobutyl-1,4- dioxaspiro[4.4]nonane through 1,6-hydride transfer process.
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Huang, Rui-Wen, and 黃瑞雯. "Magnesium Bromide Promoted Barbier Type Intramolecular Cyclization of Halo Substituted Acetals, Ketals and Orthoesters." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/31246569561688239396.

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Genest, Nicolas. "Synthèse et analyse conformationelle de dipeptides contenant l’isostère hydroxyéthylène." Thèse, 2010. http://hdl.handle.net/1866/4664.

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Dans ce mémoire, je présente mes études sur une stratégie efficace développée pour la synthèse de cétones homoallyliques substituées à partir de l’addition en cascade de réactifs de Grignard vinyliques substitués sur des α-amino esters catalysée par des sels de cuivre. L’utilisation de ces cétones homoallyliques a permis d’obtenir des mimes peptidiques comprenant un isostère de type hydroxyéthylène du lien amide. L’étape clé de cette stratégie repose sur la synthèse de cétones homoallyliques substituées intermédiaires à partir de la réaction d’additions en cascade catalysée au cuivre, de bromure de β,β-diméthylevinyle magnésium sur des analogues d’esters de la phénylalanine et de la sérine. Les cétones homoallyliques résultantes sont réduites sélectivement en alcool, la liaison double est clivée oxydativement et l’acide carboxylique résultant est couplé à un acide aminé. Afin d’évaluer l’effet qu’ont le remplacement du lien amide central dans un coude β par un hydroxyéthylène et de la présence d’un gem diméthyle sur la chaîne carbonée sur la conformation tridimensionnelle adoptée par les tripeptides générés, des analyses à l’état solide par diffraction aux rayons X, des analyses en solution par la spectroscopie RMN et des expériences de type NOESY ont été réalisées. Ces études ont permis de définir un nouveau type de coude β. La présence de pont hydrogène intramoléculaire et l’effet de restriction de conformation induit par le gem diméthyle, généralement appelé effet Thorpe-Ingold, favorisent la formation d’un coude β.
In this thesis, I discuss my studies toward the synthesis of substituted homoallylic ketones from the copper-catalyzed cascade addition of substitued vinyl Grignard reagents to carboxylic esters. The homoallylic ketones were used to provide different peptidomimetics containing a hydroxyethylene isostere instead of an amide bond. The methyl ester of phenylalanine and serine derivatives were reacted in copper-catalyzed cascade additions of substitued vinylmagnesium bromide to provide substitued homoallylic ketone intermediates. Selective reduction of the ketone to an alcohol, oxidative cleavage of the double bond, followed by peptide coupling with amino acid lead to the desired peptidomimic. The influence of changing the central amide bond for a hydroxyethylene isostere in a β-turn and the effect of a gem dimethyl group on the backbone conformation adopted by the newly synthesized tripeptides, were studied by X-ray diffraction and solution NMR spectroscopy using NOESY experiments. From these studies, it was revealed that the iso-butyric acid hydroxyethylene isomer induced a β-turn-like conformation, and may serve as a novel scaffold for peptide mimicry.
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Rauhut, Christian Bernhard [Verfasser]. "Preparation of functionalized organomagnesium Reagents by ortho-magnesiation, sulfoxide-, iodine- and bromine-magnesium exchange reactions / Christian Bernhard Rauhut." 2008. http://d-nb.info/99267414X/34.

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Book chapters on the topic "Magnesium bromure"

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Bährle-Rapp, Marina. "Magnesium Bromide." In Springer Lexikon Kosmetik und Körperpflege, 335. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_6193.

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Hüttner, W. "91 BrMg X 2Σ+ Magnesium bromide." In Diamagnetic Diatomic Molecules. Part 1, 133. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-540-69954-5_93.

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Christen, Dines. "Molecular Constants of BrMg X 2Σ+ Magnesium Bromide." In Molecular Constants Mostly from Microwave, Molecular Beam, and Sub-Doppler Laser Spectroscopy, 198–201. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-49199-7_60.

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Matsumoto, Arimasa. "Iron-Catalyzed Phenanthrene Synthesis from Alkyne and Aryl Bromide Mediated by Metallic Magnesium." In Iron-Catalyzed Synthesis of Fused Aromatic Compounds via C–H Bond Activation, 65–71. Tokyo: Springer Japan, 2014. http://dx.doi.org/10.1007/978-4-431-54928-4_4.

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Shimizu, M. "Bromination Reactions Involving Magnesium Bromide." 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-007-00625.

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Rück-Braun, K., and T. Freysoldt. "Hydrobromination of Epoxides Using Magnesium Bromide." In Chlorine, Bromine, and Iodine, 1. Georg Thieme Verlag KG, 2007. http://dx.doi.org/10.1055/sos-sd-035-00447.

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Rück-Braun, K., and T. Freysoldt. "Hydroiodination of Epoxides Using Magnesium Iodide." In Chlorine, Bromine, and Iodine, 1. Georg Thieme Verlag KG, 2007. http://dx.doi.org/10.1055/sos-sd-035-00617.

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Shimizu, M. "Synthesis of Magnesium Bromide–Tetrahydrofuran Complex." 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-007-00616.

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Shimizu, M. "Magnesium Bromide Promoted Addition to Aldehydes." 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-007-00623.

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Shimizu, M. "Rearrangement of Epoxides Using Magnesium Bromide." 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-007-00624.

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