Beryllium bromide: Difference between revisions
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{{chembox |
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| verifiedrevid = 459960826 |
| verifiedrevid = 459960826 |
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| ImageFile = Beryllium bromide.svg |
| ImageFile = Beryllium bromide.svg |
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| ImageSize = 250px |
| ImageSize = 250px |
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| ImageFile1 = EntryWithCollCode92585.png |
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| ImageSize1 = 250px |
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| ImageFile2 = EntryWithCollCode92587.png |
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| ImageSize2 = 250px |
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| IUPACName = Beryllium bromide |
| IUPACName = Beryllium bromide |
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| SystematicName = |
| SystematicName = |
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| OtherNames = |
| OtherNames = |
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|Section1={{Chembox Identifiers |
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| Abbreviations = |
| Abbreviations = |
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| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} |
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} |
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| ChemSpiderID = 74208 |
| ChemSpiderID = 74208 |
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| InChIKey = PBKYCFJFZMEFRS-NUQVWONBAJ |
| InChIKey = PBKYCFJFZMEFRS-NUQVWONBAJ |
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| CASNo_Ref = {{cascite| |
| CASNo_Ref = {{cascite|correct|ECHA}} |
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| CASNo = 7787-46-4 |
| CASNo = 7787-46-4 |
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| EINECS = |
| EINECS = 232-115-9 |
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| EINECSCASNO = |
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| StdInChI_Ref = {{stdinchicite|correct|chemspider}} |
| StdInChI_Ref = {{stdinchicite|correct|chemspider}} |
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| StdInChI = 1S/Be.2BrH/h;2*1H/q+2;;/p-2 |
| StdInChI = 1S/Be.2BrH/h;2*1H/q+2;;/p-2 |
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| StdInChIKey = PBKYCFJFZMEFRS-UHFFFAOYSA-L |
| StdInChIKey = PBKYCFJFZMEFRS-UHFFFAOYSA-L |
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| PubChem = 82230 |
| PubChem = 82230 |
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| SMILES = Br[Be-2](Br)([Br+]1)[Br+][Be-2]1([Br+]1)[Br+][Be-2]1([Br+]1)[Br+][Be-2]1([Br+]1)[Br+][Be-2]1([Br+]1)[Br+][Be-2]1([Br+]1)[Br+][Be-2]1([Br+]1)[Br+][Be-2]1([Br+]1)[Br+][Be-2]1([Br+]1)[Br+][Be-2]1([Br+]1)[Br+][Be-2]1([Br+]1)[Br+][Be-2]1([Br+]1)[Br+][Be-2]1(Br)Br |
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| SMILES = [Be+2].[Br-].[Br-] |
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| InChI = 1/Be.2BrH/h;2*1H/q+2;;/p-2 |
| InChI = 1/Be.2BrH/h;2*1H/q+2;;/p-2 |
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| RTECS = |
| RTECS = |
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| UNII = T00751H2J8 |
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| MeSHName = |
| MeSHName = |
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| ChEBI_Ref = {{ebicite|correct|EBI}} |
| ChEBI_Ref = {{ebicite|correct|EBI}} |
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| KEGG_Ref = {{keggcite|correct|kegg}} |
| KEGG_Ref = {{keggcite|correct|kegg}} |
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| KEGG = |
| KEGG = |
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}} |
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| ATCCode_prefix = |
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|Section2={{Chembox Properties |
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| ATCCode_suffix = |
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| ATC_Supplemental =}} |
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| Section2 = {{Chembox Properties |
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| Formula = [[Beryllium|Be]][[Bromine|Br<sub>2</sub>]] |
| Formula = [[Beryllium|Be]][[Bromine|Br<sub>2</sub>]] |
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| MolarMass = 168.820 g/mol |
| MolarMass = 168.820 g/mol |
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| Appearance = colorless white crystals |
| Appearance = colorless white crystals |
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| Density = 3.465 g/cm<sup>3</sup> (20 °C) |
| Density = 3.465 g/cm<sup>3</sup> (20 °C) |
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| MeltingPtC = 508 |
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| MeltingPt_ref = [[Sublimation (chemistry)|sublimes]] at {{convert|473|C|F K}} |
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| BoilingPtC = 520 |
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| BoilingPt_ref = <ref name="hand"> |
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{{Citation |
{{Citation |
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| last1 = Perry |
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| first1 =Dale L. |
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| last2 =Phillips |
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| author-link = |
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| first2 =Sidney L. |
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| last2 =Phillips |
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| year =1995 |
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| first2 =Sidney L. |
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| title =Handbook of Inorganic Compounds |
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| author2-link = |
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| publisher =CRC Press |
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| publication-date = |
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| pages =61–62 |
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| isbn =0-8493-8671-3 |
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| year =1995 |
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| url= https://books.google.com/books?id=0fT4wfhF1AsC&q=%22beryllium+bromide%22+properties&pg=PA61 |
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| title =Handbook of Inorganic Compounds |
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| access-date = 2007-12-10 |
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| edition = |
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| volume = |
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| series = |
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| publication-place = |
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| place = |
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| publisher =CRC Press |
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| id = |
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| pages =61–62 |
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| isbn =0-8493-8671-3 |
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| doi = |
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| oclc = |
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| url= http://books.google.com/?id=0fT4wfhF1AsC&pg=PA61&dq=%22beryllium+bromide%22+properties |
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| accessdate = 2007-12-10 |
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}}</ref> |
}}</ref> |
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| Boiling_notes = |
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| Solubility = Highly<ref name="hand"/> |
| Solubility = Highly<ref name="hand"/> |
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| SolubleOther = soluble in [[ethanol]], [[diethyl ether]], [[pyridine]] <br> insoluble in [[benzene]] |
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| SolubleOther = Soluble<ref name="lit"> |
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{{Citation |
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| last = Parsons |
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| first =Charles Lathrop |
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| author-link = |
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| last2 = |
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| first2 = |
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| author2-link = |
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| publication-date = |
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| date = |
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| year =1909 |
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| title =The Chemistry and Literature of Beryllium |
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| edition = |
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| volume = |
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| series = |
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| publication-place = |
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| place =Easton, Pa. |
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| publisher =Chemical Publishing |
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| id = |
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| pages =21–22 |
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| isbn = |
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| doi = |
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| oclc = |
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| url =http://books.google.com/?id=7MxAAAAAIAAJ&pg=PA21&dq=%22beryllium+bromide%22 |
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| accessdate = 2007-12-10 |
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}} |
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</ref> |
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| Solvent = [[ethanol]] |
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| LogP = |
| LogP = |
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| VaporPressure = |
| VaporPressure = |
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| pKa = |
| pKa = |
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| pKb = }} |
| pKb = }} |
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|Section3={{Chembox Structure |
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| CrystalStruct = [[Orthorhombic]] |
| CrystalStruct = [[Orthorhombic]] |
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| Coordination = |
| Coordination = |
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| MolShape = }} |
| MolShape = }} |
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|Section4={{Chembox Thermochemistry |
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| DeltaHf = -2.094 kJ/g |
| DeltaHf = -2.094 kJ/g |
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| DeltaHc = |
| DeltaHc = |
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| HeatCapacity = 0.4111 J/g K |
| HeatCapacity = 0.4111 J/g K |
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}} |
}} |
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|Section7={{Chembox Hazards |
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| AdminRoutes = |
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| Bioavail = |
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| Metabolism = |
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| HalfLife = |
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| ProteinBound = |
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| Excretion = |
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| Legal_status = |
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| PregCat_US = }} |
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| Section6 = {{Chembox Explosive |
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| ShockSens = |
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| FrictionSens = |
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| ExplosiveV = |
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| REFactor = }} |
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| Section7 = {{Chembox Hazards |
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| EUClass = |
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| EUIndex = |
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| MainHazards = ''see [[Berylliosis]]'' |
| MainHazards = ''see [[Berylliosis]]'' |
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| NFPA-H = |
| NFPA-H = 4 |
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| NFPA-F = |
| NFPA-F = 0 |
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| NFPA-R = |
| NFPA-R = 0 |
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| GHSPictograms = {{GHS06}}{{GHS08}}{{GHS09}} |
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| NFPA-O = |
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| GHSSignalWord = Danger |
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| HPhrases = {{H-phrases|350i|330|301|372|319|335|315|317|411}} |
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| SPhrases = |
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| PPhrases = {{P-phrases|260|301+310|304+340|305+351+338|320|330|405|501}} |
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| RSPhrases = |
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| FlashPt = |
| FlashPt = |
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| AutoignitionPt = |
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| ExploLimits = |
| ExploLimits = |
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| LD50 = |
| LD50 = |
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| REL = Ca C 0.0005 mg/m<sup>3</sup> (as Be)<ref name=PGCH>{{PGCH|0054}}</ref> |
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| PEL = }} |
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| PEL = TWA 0.002 mg/m<sup>3</sup><br/>C 0.005 mg/m<sup>3</sup> (30 minutes), with a maximum peak of 0.025 mg/m<sup>3</sup> (as Be)<ref name=PGCH/> |
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| Section8 = {{Chembox Related |
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| IDLH = Ca [4 mg/m<sup>3</sup> (as Be)]<ref name=PGCH/>}} |
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|Section8={{Chembox Related |
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| OtherAnions = [[Beryllium fluoride]]<br>[[Beryllium chloride]]<br>[[Beryllium iodide]] |
| OtherAnions = [[Beryllium fluoride]]<br>[[Beryllium chloride]]<br>[[Beryllium iodide]] |
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| OtherCations = [[Magnesium bromide]]<br/>[[Calcium bromide]]<br/>[[Strontium bromide]]<br/>[[Barium bromide]]<br/>[[Radium bromide]] |
| OtherCations = [[Magnesium bromide]]<br/>[[Calcium bromide]]<br/>[[Strontium bromide]]<br/>[[Barium bromide]]<br/>[[Radium bromide]] |
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| OtherFunction_label = |
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| OtherCompounds = }} |
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'''Beryllium bromide''' is the [[chemical compound]] with the [[chemical formula|formula]] BeBr<sub>2</sub>. It is very [[hygroscopic]] and dissolves well in [[water]]. |
'''Beryllium bromide''' is the [[chemical compound]] with the [[chemical formula|formula]] BeBr<sub>2</sub>. It is very [[hygroscopic]] and dissolves well in [[water]]. The compound is a polymer with tetrahedral coordinated Be centres.<ref>Crystal modifications of Beryllium dihalides BeCl2, BeBr2, and BeI2 Troyanov, S. I. Zhurnal Neorganicheskoi Khimii (2000), 45(10), 1619-1624.</ref> |
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==Preparation and reactions== |
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==Reactions== |
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It can be prepared by reacting [[beryllium]] metal with elemental [[bromine]] at temperatures of 500 °C to 700 °C:<ref name="hand"/> |
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: |
:Be + Br<sub>2</sub> → BeBr<sub>2</sub> |
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Beryllium bromide is also formed when |
Beryllium bromide is also formed when treating [[beryllium oxide]] with [[hydrobromic acid]]: |
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:BeO + 2 HBr → BeBr<sub>2</sub> + H<sub>2</sub>O |
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<ref name="lit"/>: |
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:[[Beryllium oxide|BeO]] + 2 HBr → BeBr<sub>2</sub> + [[water|H<sub>2</sub>O]] |
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It |
It hydrolyzes slowly in water: BeBr<sub>2</sub> + 2 H<sub>2</sub>O → 2 HBr + Be(OH)<sub>2</sub> |
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==Structure== |
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Two forms ([[Polymorphism (materials science)|polymorph]]s) of BeBr<sub>2</sub> are known. Both structures consist of tetrahedral Be<sup>2+</sup> centers interconnected by doubly bridging bromide ligands. One form consist of edge-sharing polytetrahedra. The other form resembles [[zinc iodide]] with interconnected [[adamantane]]-like cages.<ref> {{cite journal|doi=10.1021/acs.inorgchem.0c02832|title=A Second Modification of Beryllium Bromide: β-BeBr<sub>2</sub> |year=2020 |last1=Buchner |first1=Magnus R. |last2=Dankert |first2=Fabian |last3=Spang |first3=Nils |last4=Pielnhofer |first4=Florian |last5=von Hänisch |first5=Carsten |journal=Inorganic Chemistry |volume=59 |issue=23 |pages=16783–16788 |pmid=33185106 |s2cid=226850424 |doi-access=free }}</ref> |
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==Safety== |
==Safety== |
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{{Beryllium compounds}} |
{{Beryllium compounds}} |
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{{bromides}} |
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{{bromine compounds}} |
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{{DEFAULTSORT:Beryllium Bromide}} |
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{{DEFAULTSORT:Beryllium Bromide}} |
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[[Category:Beryllium compounds]] |
[[Category:Beryllium compounds]] |
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[[Category:Bromides]] |
[[Category:Bromides]] |
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[[Category: |
[[Category:Alkaline earth metal halides]] |
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[[Category:Inorganic polymers]] |
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{{inorganic-compound-stub}} |
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[[ar:بروميد بيريليوم]] |
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[[de:Berylliumbromid]] |
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[[fa:بریلیم برمید]] |
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[[nl:Berylliumbromide]] |
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[[ja:臭化ベリリウム]] |
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[[ru:Бромид бериллия]] |
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[[zh:溴化鈹]] |
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Revision as of 21:52, 28 January 2023
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| Names | |
|---|---|
| IUPAC name
Beryllium bromide
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| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.029.196 |
| EC Number |
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PubChem CID
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| UNII | |
CompTox Dashboard (EPA)
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| Properties | |
| BeBr2 | |
| Molar mass | 168.820 g/mol |
| Appearance | colorless white crystals |
| Density | 3.465 g/cm3 (20 °C) |
| Melting point | 508 °C (946 °F; 781 K)sublimes at 473 °C (883 °F; 746 K) |
| Boiling point | 520 °C (968 °F; 793 K)[1] |
| Highly[1] | |
| Solubility | soluble in ethanol, diethyl ether, pyridine insoluble in benzene |
| Structure | |
| Orthorhombic | |
| Thermochemistry | |
Heat capacity (C)
|
0.4111 J/g K |
Std molar
entropy (S⦵298) |
9.5395 J/K |
Std enthalpy of
formation (ΔfH⦵298) |
-2.094 kJ/g |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards
|
see Berylliosis |
| GHS labelling: | |
  
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| Danger | |
| H301, H315, H317, H319, H330, H335, H350i, H372, H411 | |
| P260, P301+P310, P304+P340, P305+P351+P338, P320, P330, P405, P501 | |
| NFPA 704 (fire diamond) | |
| NIOSH (US health exposure limits): | |
PEL (Permissible)
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TWA 0.002 mg/m3 C 0.005 mg/m3 (30 minutes), with a maximum peak of 0.025 mg/m3 (as Be)[2] |
REL (Recommended)
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Ca C 0.0005 mg/m3 (as Be)[2] |
IDLH (Immediate danger)
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Ca [4 mg/m3 (as Be)][2] |
| Related compounds | |
Other anions
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Beryllium fluoride Beryllium chloride Beryllium iodide |
Other cations
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Magnesium bromide Calcium bromide Strontium bromide Barium bromide Radium bromide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Beryllium bromide is the chemical compound with the formula BeBr2. It is very hygroscopic and dissolves well in water. The compound is a polymer with tetrahedral coordinated Be centres.[3]
Preparation and reactions
It can be prepared by reacting beryllium metal with elemental bromine at temperatures of 500 °C to 700 °C:[1]
- Be + Br2 → BeBr2
Beryllium bromide is also formed when treating beryllium oxide with hydrobromic acid:
- BeO + 2 HBr → BeBr2 + H2O
It hydrolyzes slowly in water: BeBr2 + 2 H2O → 2 HBr + Be(OH)2
Structure
Two forms (polymorphs) of BeBr2 are known. Both structures consist of tetrahedral Be2+ centers interconnected by doubly bridging bromide ligands. One form consist of edge-sharing polytetrahedra. The other form resembles zinc iodide with interconnected adamantane-like cages.[4]
Safety
Beryllium compounds are toxic if inhaled or ingested.
References
- ^ a b c Perry, Dale L.; Phillips, Sidney L. (1995), Handbook of Inorganic Compounds, CRC Press, pp. 61–62, ISBN 0-8493-8671-3, retrieved 2007-12-10
- ^ a b c NIOSH Pocket Guide to Chemical Hazards. "#0054". National Institute for Occupational Safety and Health (NIOSH).
- ^ Crystal modifications of Beryllium dihalides BeCl2, BeBr2, and BeI2 Troyanov, S. I. Zhurnal Neorganicheskoi Khimii (2000), 45(10), 1619-1624.
- ^ Buchner, Magnus R.; Dankert, Fabian; Spang, Nils; Pielnhofer, Florian; von Hänisch, Carsten (2020). "A Second Modification of Beryllium Bromide: β-BeBr2". Inorganic Chemistry. 59 (23): 16783–16788. doi:10.1021/acs.inorgchem.0c02832. PMID 33185106. S2CID 226850424.