Magnesium bromide is a chemical compound of magnesium and bromine, with the chemical formula MgBr2. It is white and deliquescent crystalline solid. It is often used as a mild sedative and as an anticonvulsant for treatment of nervous disorders.[2] It is water-soluble and somewhat soluble in alcohol. It can be found naturally in small amounts in some minerals such as: bischofite and carnallite, and in sea water, such as that of the Dead Sea.[3][4]
Magnesium bromide can be synthesized by treating with magnesium oxide (and related basic salts) with hydrobromic acid.[4] It can also be made by reacting magnesium carbonate and hydrobromic acids, and collecting the solid left after evaporation.[3]
As suggested by its easy conversion to various hydrates, anhydrous MgBr2 is a Lewis acid. In the coordination polymer with the formula MgBr2(dioxane)2, Mg2+ adopts an octahedral geometry.[5]
Magnesium bromide hexahydrate has properties as a flame retardant. It was found that if 0.125 mol/L of magnesium bromide hexahydrate was added to a cotton material it acted as a flame retardant.[9]
ReferencesEdit
^ Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, Florida: CRC Press. pp. 4–67. ISBN0-8493-0594-2.
^Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN0-07-049439-8
^ abcGruyter, W. Concise Encyclopedia Chemistry, Walter de Gruyter & Company: Berlin, 1993; 612
^ abLewis, R.J. Hawley’s Condensed Chemical Dictionary, 15th ed.; John Wiley &Sons Inc.:New York, 2007; 777
^Fischer, Reinald; Görls, Helmar; Meisinger, Philippe R.; Suxdorf, Regina; Westerhausen, Matthias (2019). "Structure–Solubility Relationship of 1,4‐Dioxane Complexes of Di(hydrocarbyl)magnesium". Chemistry – A European Journal. 25 (55): 12830–12841. doi:10.1002/chem.201903120. PMC7027550. PMID 31328293.
^Evans, David A.; Tedrow, Jason S.; Shaw, Jared T.; Downey, C. Wade (2002). "Diastereoselective Magnesium Halide-Catalyzed anti-Aldol Reactions of Chiral N-Acyloxazolidinones". Journal of the American Chemical Society. 124 (3): 392–393. doi:10.1021/ja0119548. PMID 11792206.
^Lim, Young Mook; Cho, Hyeon Mo; Lee, Myong Euy; Baeck, Kyoung Koo (2006). "A Stable Magnesium Bromosilylenoid: Transmetalation of a Lithium Bromosilylenoid by Magnesium Bromide". Organometallics. 25 (21): 4960. doi:10.1021/om060589w.
^Mostashari, S. M.; Fayyaz, F. (2008). "XRD characterization of the ashes from a burned cellulosic fabric impregnated with magnesium bromide hexahydrate as flame-retardant". Journal of Thermal Analysis and Calorimetry. 92 (3): 845. doi:10.1007/s10973-007-8928-4. S2CID 94416902.
October 21, 2023
magnesium, bromide, chemical, compound, magnesium, bromine, with, chemical, formula, mgbr2, white, deliquescent, crystalline, solid, often, used, mild, sedative, anticonvulsant, treatment, nervous, disorders, water, soluble, somewhat, soluble, alcohol, found, . Magnesium bromide is a chemical compound of magnesium and bromine with the chemical formula MgBr2 It is white and deliquescent crystalline solid It is often used as a mild sedative and as an anticonvulsant for treatment of nervous disorders 2 It is water soluble and somewhat soluble in alcohol It can be found naturally in small amounts in some minerals such as bischofite and carnallite and in sea water such as that of the Dead Sea 3 4 Magnesium bromide 1 IdentifiersCAS Number 7789 48 2 anhydrous Y13446 53 2 hexahydrate N75198 45 7 decahydrate N3D model JSmol Interactive imageChemSpider 74219 YECHA InfoCard 100 029 246PubChem CID 522691UNII 2VC6P60SLN YCompTox Dashboard EPA DTXSID7064865InChI InChI 1S 2BrH Mg h2 1H q 2 p 2 YKey OTCKOJUMXQWKQG UHFFFAOYSA L YInChI 1 2BrH Mg h2 1H q 2 p 2Key OTCKOJUMXQWKQG NUQVWONBAYSMILES Mg 2 Br Br PropertiesChemical formula MgBr2 anhydrous MgBr2 6H2O hexahydrate Molar mass 184 113 g mol anhydrous 292 204 g mol hexahydrate Appearance white hygroscopic hexagonal crystals anhydrous colorless monoclinic crystals hexahydrate Density 3 72 g cm3 anhydrous 2 07 g cm3 hexahydrate Melting point 711 C 1 312 F 984 K 172 4 C decomposes hexahydrate Boiling point 1 250 C 2 280 F 1 520 K Solubility in water 102 g 100 mL anhydrous 316 g 100 mL 0 C hexahydrate Solubility ethanol 6 9 g 100 mL methanol 21 8 g 100 mL Magnetic susceptibility x 72 0 10 6 cm3 molStructureCrystal structure Rhombohedral hP3Space group P 3m1 No 164Coordination geometry octahedralThermochemistryHeat capacity C 70 J mol K Std molarentropy S 298 117 2 J mol 1 K 1Std enthalpy offormation DfH 298 524 3 kJ mol 1HazardsNFPA 704 fire diamond 100Safety data sheet SDS External SDSRelated compoundsOther anions Magnesium fluorideMagnesium chlorideMagnesium iodideOther cations Beryllium bromideCalcium bromideStrontium bromideBarium bromideRadium bromideExcept where otherwise noted data are given for materials in their standard state at 25 C 77 F 100 kPa N verify what is Y N Infobox referencesSynthesis EditMagnesium bromide can be synthesized by treating with magnesium oxide and related basic salts with hydrobromic acid 4 It can also be made by reacting magnesium carbonate and hydrobromic acids and collecting the solid left after evaporation 3 As suggested by its easy conversion to various hydrates anhydrous MgBr2 is a Lewis acid In the coordination polymer with the formula MgBr2 dioxane 2 Mg2 adopts an octahedral geometry 5 Uses EditMagnesium bromide is used as a Lewis acid catalyst in some organic synthesis e g in aldol reaction 6 In organosilicon chemistry magnesium bromide forms adducts R2SiXMgBr2 7 Magnesium bromide also has been used as a tranquilizer 3 Magnesium bromide modifies the catalytic properties of palladium on charcoal 8 Magnesium bromide hexahydrate has properties as a flame retardant It was found that if 0 125 mol L of magnesium bromide hexahydrate was added to a cotton material it acted as a flame retardant 9 References Edit Lide David R 1998 Handbook of Chemistry and Physics 87 ed Boca Raton Florida CRC Press pp 4 67 ISBN 0 8493 0594 2 Pradyot Patnaik Handbook of Inorganic Chemicals McGraw Hill 2002 ISBN 0 07 049439 8 a b c Gruyter W Concise Encyclopedia Chemistry Walter de Gruyter amp Company Berlin 1993 612 a b Lewis R J Hawley s Condensed Chemical Dictionary 15th ed John Wiley amp Sons Inc New York 2007 777 Fischer Reinald Gorls Helmar Meisinger Philippe R Suxdorf Regina Westerhausen Matthias 2019 Structure Solubility Relationship of 1 4 Dioxane Complexes of Di hydrocarbyl magnesium Chemistry A European Journal 25 55 12830 12841 doi 10 1002 chem 201903120 PMC 7027550 PMID 31328293 Evans David A Tedrow Jason S Shaw Jared T Downey C Wade 2002 Diastereoselective Magnesium Halide Catalyzed anti Aldol Reactions of Chiral N Acyloxazolidinones Journal of the American Chemical Society 124 3 392 393 doi 10 1021 ja0119548 PMID 11792206 Lim Young Mook Cho Hyeon Mo Lee Myong Euy Baeck Kyoung Koo 2006 A Stable Magnesium Bromosilylenoid Transmetalation of a Lithium Bromosilylenoid by Magnesium Bromide Organometallics 25 21 4960 doi 10 1021 om060589w Bouzide Abderrahim 2002 Magnesium Bromide Mediated Highly Diastereoselective Heterogeneous Hydrogenation of Olefins Organic Letters 4 8 1347 50 doi 10 1021 ol020032m PMID 11950359 Mostashari S M Fayyaz F 2008 XRD characterization of the ashes from a burned cellulosic fabric impregnated with magnesium bromide hexahydrate as flame retardant Journal of Thermal Analysis and Calorimetry 92 3 845 doi 10 1007 s10973 007 8928 4 S2CID 94416902 Retrieved from https en wikipedia org w index php title Magnesium bromide amp oldid 1138819082, wikipedia, wiki, book, books, library,
