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Updating {{chembox}} (no changed fields - added verified revid - updated 'UNII_Ref', 'ChemSpiderID_Ref', 'StdInChI_Ref', 'StdInChIKey_Ref', 'ChEMBL_Ref', 'KEGG_Ref') per Chem/Drugbox validation (
 
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{{chembox
{{chembox
| Verifiedfields = changed
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| verifiedrevid = 401844247
| Watchedfields = changed
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| Name = Mercury(I) bromide
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| verifiedrevid =
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| ImageFile = Mercury(I)-bromide-xtal-3D-vdW.png
⚫
| Name = Mercury(I) bromide
⚫
| ImageSize =
| ImageName = Mercury(I) bromiden
| =MercuryI
| IUPACName = Mercury(I) bromide
| = Mercury(I)bromide
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| ImageSize =
⚫
| OtherNames = Mercurous bromide
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| = Mercury(I)bromide
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| Section1 = {{Chembox Identifiers
| IUPACName = Dimercury dibromide
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| CASNo = 15385-58-7
⚫
| OtherNames = Mercurous bromide
⚫
| RTECS = ?
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|Section1={{Chembox Identifiers
| CASNo_Ref = {{cascite|correct|CAS}}
⚫
| CASNo = --
| ChemSpiderID = 23214
| EINECS = 621-489-2
| PubChem = 24829
⚫
| RTECS =
| UNNumber = 1634
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = JSJ4936A2S
| SMILES = Br[Hg][Hg]Br
| StdInChI = 1S/2BrH.2Hg/h2*1H;;/q;;2*+1/p-2
| StdInChIKey = RVARJMCTILSHND-UHFFFAOYSA-L
}}
}}
| Section2 = {{Chembox Properties
|Section2={{Chembox Properties
| Formula = Hg<sub>2</sub>Br<sub>2</sub>
| Formula = Hg<sub>2</sub>Br<sub>2</sub>
| MolarMass = 560.99 g/mol
| MolarMass = 560.99 g/mol
| Appearance = white tetragonal crystals
| Appearance = white tetragonal crystals
| Odor = odorless
| Density = 7.307 g/cm³, solid
| Solubility = 3.9 x 10<sup>-5</sup> g/100 mL
| = . <sup></sup>
| Solubility = 3.9 x 10<sup>−5</sup> g/100 mL
| MeltingPt = 405°C
| SolubleOther = insoluble in [[diethyl ether|ether]], [[acetone]], [[ethanol|alcohol]]
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| BoilingPt = [[Sublimation (chemistry)|sublimes]] at 340-350°C
| SolubilityProduct = 6.4{{e|&minus;23}}<ref name="crc">{{cite book |author1=John Rumble |title=CRC Handbook of Chemistry and Physics |date=June 18, 2018 |publisher=CRC Press |isbn=978-1138561632 |pages=5–188|edition=99 |language=English}}</ref>
⚫
<ref name="hand">
| MeltingPtC = 405
| BoilingPt= ~
| BoilingPtC = 390
⚫
| = [[Sublimation (chemistry)|sublimes]]
{{Citation
{{Citation
| last = Perry
| = Perry
| first = Dale L.
| = Dale L.
| author-link =
| last2 = Phillips
| last2 = Phillips
| first2 = Sidney L.
| first2 = Sidney L.
| author2-link =
| publication-date =
| date =
| year = 1995
| year = 1995
| title = Handbook of Inorganic Compounds
| title = Handbook of Inorganic Compounds
| edition =
| volume =
| series =
| publication-place =
| place =
| publisher = CRC Press
| publisher = CRC Press
| id =
| =
| isbn = 0849386713
| doi =
| oclc =
| pages = 255
| pages = 255
| url = http://books.google.com/?id=0fT4wfhF1AsC&pg=PA255&dq=%22Mercury(I)+bromide%22
| url = ://books.google.com/?id=0fT4wfhF1AsC&=%22Mercury(I)+bromide%22
| accessdate = 2008-05-30
| = 2008-05-30
}}</ref>
}}</ref>
| MagSus = &minus;28.6·10<sup>−6</sup> cm<sup>3</sup>/mol

}}
}}
| Section3 = {{Chembox Structure
|Section3={{Chembox Structure
| MolShape = linear
| MolShape = linear
| Coordination =
| Coordination =
| CrystalStruct =
| CrystalStruct =
| Dipole =
| Dipole =
}}
}}
| Section7 = {{Chembox Hazards
|Section7={{Chembox Hazards
| GHSPictograms = {{GHS06}}{{GHS08}}{{GHS09}}
| EUClass = Very toxic ('''T+''')<br />Dangerous for<br /> the environment ('''N''')
| GHSSignalWord = Danger
| RPhrases = {{R26/27/28}}, {{R33}}, {{R50/53}}
| HPhrases = {{H-phrases|300|310|330|373|410}}
| SPhrases = {{S13}}, {{S28}}, {{S45}}, {{S60}}, {{S61}}<ref name="sa">
| PPhrases = {{P-phrases|260|262|264|270|271|273|280|284|301+310|302+350|304+340|310|314|320|321|322|330|361|363|391|403+233|405|501}}
⚫
{{cite web |url= http://www.sigmaaldrich.com/catalog/search/ProductDetail/ALDRICH/483230|title= 483230 Mercury(I) bromide 99.9+ % |accessdate=2008-05-30 |publisher= Sigma-Aldrich|date= }}</ref>
⚫
<ref name="">
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| FlashPt = non-flammable
⚫
{{cite web |url= http://www.sigmaaldrich.com/catalog/search/ProductDetail/ALDRICH/483230|title= 483230 Mercury(I) bromide 99.9+ % |=2008-05-30 |publisher= Sigma-Aldrich}}</ref>
⚫
| FlashPt = non-flammable
}}
}}
| Section8 = {{Chembox Related
|Section8={{Chembox Related
| OtherAnions = [[Mercury(I) fluoride]]<br />[[Mercury(I) chloride]]<br />[[Mercury(I) iodide]]
| OtherAnions = [[Mercury(I) fluoride]]<br />[[Mercury(I) chloride]]<br />[[Mercury(I) iodide]]
| OtherCations = [[Zinc bromide]]<br />[[Cadmium bromide]]<br />[[Mercury(II) bromide]]
| OtherCations = [[Zinc bromide]]<br />[[Cadmium bromide]]
[[Mercury(II) bromide]]
}}
}}
}}
}}


'''Mercury(I) bromide''' or '''mercurous bromide''' is the [[chemical compound]] composed of [[mercury (element)|mercury]] and [[bromine]] with the [[chemical formula|formula]] Hg<sub>2</sub>Br<sub>2</sub>. It changes color from white to yellow when heated<ref name="hand"/> and [[Fluorescence|fluoresces]] orange when exposed to [[ultraviolet]] light. It has applications in [[Acousto-optics|acousto-optical devices]].<ref name="dict">
'''Mercury(I) bromide''' or '''mercurous bromide''' is the [[chemical compound]] composed of [[mercury (element)|mercury]] and [[bromine]] with the [[chemical formula|formula]] Hg<sub>2</sub>Br<sub>2</sub>. It changes color from white to yellow when heated<ref name="hand"/> and [[Fluorescence|fluoresces]] when exposed to [[ultraviolet]] light. It has applications in [[Acousto-optics|acousto-optical devices]].<ref name="dict">
{{Citation
{{Citation
| last = Macintyre
| = Macintyre
| first = Jane Elizabeth
| = Jane Elizabeth
| author-link =
| last2 = Daniel
| last2 = Daniel
| first2 = F. M.
| first2 = F. M.
| author2-link =
| last3 = Stirling
| last3 = Stirling
| first3 = V. M.
| first3 = V. M.
| author3-link =
| publication-date =
| date =
| year = 1992
| year = 1992
| title = Dictionary of Inorganic Compounds
| title = Dictionary of Inorganic Compounds
| edition =
| volume = 1
| volume = 1
| series =
| publication-place =
| place =
| publisher = CRC Press
| publisher = CRC Press
| id =
| =
| isbn = 0412301202
| doi =
| oclc =
| pages = 314
| pages = 314
| url = http://books.google.com/?id=YmBiXJ7qRtAC&pg=PA314&dq=Mercury(I)+bromide
| url = ://books.google.com/?id=YmBiXJ7qRtAC&=Mercury(I)+bromide
| accessdate = 2008-05-30
| = 2008-05-30
}}</ref>
}}</ref>


A very rare mineral form is called kuzminite, Hg<sub>2</sub>(Br,Cl)<sub>2</sub>.
A very rare mineral form is called kuzminite (Br,Cl)2.


==Reactions==
==Reactions==
Mercury(I) bromide is prepared by the oxidation of elemental mercury with elemental bromine or by adding [[sodium bromide]] to a solution of [[mercury(I) nitrate]]<ref name="hand"/>. It decomposes to [[mercury(II) bromide]] and elemental mercury<sup>[when?]</sup><ref name="dict"/>.
Mercury(I) bromide is prepared by the oxidation of elemental mercury with elemental bromine or by adding [[sodium bromide]] to a solution of [[mercury(I) nitrate]]<ref name="hand"/> It decomposes to [[mercury(II) bromide]] and elemental mercury<ref name="dict"/>


==Structure==
==Structure==
In common with other Hg(I) (mercurous) compounds which contain linear X-Hg-Hg-X units, Hg<sub>2</sub>Br<sub>2</sub> contains linear BrHg<sub>2</sub>Br units with an Hg-Hg bond length of 249 pm (Hg-Hg in the metal is 300 pm) and an Hg-Br bond length of 271 pm.<ref name = "Wells">Wells A.F. (1984) ''Structural Inorganic Chemistry'' 5th edition Oxford Science Publications ISBN 0-19-855370-6</ref> The overall coordination of each Hg atom is octahedral as, in addition to the two nearest neighbours, there are four other Br atoms at 332 pm.<ref name = "Wells"/> The compound is often formulated as Hg<sub>2</sub><sup>2+</sup> 2Br<sup>−</sup>.<ref name = "Cotton">{{Cotton&Wilkinson6th}}</ref>
In common with other Hg(I) (mercurous) compounds which contain linear X-Hg-Hg-X units, Hg<sub>2</sub>Br<sub>2</sub> contains linear BrHg<sub>2</sub>Br units with an Hg-Hg bond length of 249 pm (Hg-Hg in the metal is 300 pm) and an Hg-Br bond length of 271 pm.<ref name = "Wells">Wells A.F. (1984) ''Structural Inorganic Chemistry'' 5th edition Oxford Science Publications ISBN0-19-855370-6</ref> The overall coordination of each Hg atom is octahedral as, in addition to the two nearest neighbours, there are four other Br atoms at 332 pm.<ref name = "Wells"/> The compound is often formulated as Hg<sub>2</sub><sup>2+</sup> 2Br<sup>−</sup><ref name = "Cotton">{{Cotton&Wilkinson6th}}</ref>


==References==
==References==
{{reflist}}
{{reflist}}


[[Category:Mercury compounds]]
Mercury compounds
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{{ compounds}}

[[Category:Mercury(I) compounds]]
[[Category:Bromides]]
[[Category:Bromides]]
[[Category:Metal halides]]
[[Category:Metal halides]]
[[Category:Chemical compounds containing metal–metal bonds]]

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{{Mercury compounds}}
{{inorganic-compound-stub}}

[[de:Quecksilber(I)-bromid]]
[[el:Βρωμιούχος Υδράργυρος]]
[[no:Dikvikksølvdibromid]]
[[ru:Бромид диртути(2+)]]
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