View source for Promethium(III) bromide

{{chembox
| Name = Promethium(III) bromide
| OtherNames = Promethium tribromide
| Section1 = {{Chembox Identifiers
|   StdInChI=1S/3BrH.Pm/h3*1H;/q;;;+3/p-3
|   StdInChIKey = GWRKFHUNEGTAQB-UHFFFAOYSA-K
|   CASNo = 14325-78-1
  }}
| Section2 = {{Chembox Properties
|   Reference = <ref name="Cotton">{{citation | first = Simon | last = Cotton | title = Lanthanide and Actinide Chemistry | edition = 2nd | publisher = Wiley | location = New York | year = 2006 | isbn = 0470010061 | pages = 115–17}}.</ref>
|   Formula = PmBr<sub>3</sub>
|   MolarMass = 386.63 g mol<sup>−1</sup> {{#tag:ref|The molar mass is based on [[promethium-147]] (''t''<sub>½</sub>&nbsp;= 2.6234(2)&nbsp;a; ''A''<sub>r</sub>&nbsp;= {{nowrap|146.915 1385(26)}}),<ref name="NUBASE">{{NUBASE 2003}}.</ref> the most commonly encountered isotope of promethium.|group=note}}
|   Appearance = coral-red solid
|   Density = 
|   Solubility = 
|   MeltingPt = 624 °C
|   BoilingPt = 
  }}
| Section3 = {{Chembox Structure
|   Reference = <ref name="Cotton"/><ref>{{citation | first1 = W. R. | last1 = Wilmarth | first2 = R. G. | last2 = Haire | first3 = J. P. | last3 = Young | first4 = D. W. | last4 = Ramey | first5 = J. R. | last5 = Peterson | title = Absorption spectrophotometric and X-ray diffraction studies of the trihalides of promethium in the solid state | journal = J. Less Common Met. | volume = 141 | issue = 2 | year = 1988 | pages = 275–84 | doi = 10.1016/0022-5088(88)90413-4}}.</ref>
|   CrystalStruct = [[Plutonium tribromide structure|Plutonium tribromide]]
|   Coordination = bicapped trigonal prismatic (Pm<sup>3+</sup>)
  }}
| Section4 = {{Chembox Thermochemistry
|   Reference = <ref name="thermo">{{citation | first1 = V. | last1 = Wishnevsky | first2 = W. | last2 = Theissig | first3 = F. | last3 = Weigel | title = The vapor phase hydrolysis of lanthanide(III) bromides IV: Heat and free energy of the reaction PmBr<sub>3</sub>(s)&nbsp;+&nbsp;H<sub>2</sub>O(g)&nbsp;{{eqm}} {{nowrap|PmOBr(s) + 2 HBr(g)}} | journal = J. Less Common Met. | volume = 99 | issue = 2 | year = 1984 | pages 321–29 | doi = 10.1016/0022-5088(84)90230-3}}.</ref>
|   DeltaHf = −864 kJ mol<sup>−1</sup> ''est.''
  }}
| Section8 = {{Chembox Related
|   OtherAnions = [[Promethium(III) fluoride]]<br/>[[Promethium(III) chloride]]<br/>[[Promethium(III) iodide]]
|   OtherCations = [[Praseodymium(III) bromide]]<br/>[[Neodymium(III) bromide]]<br/>[[Samarium(III) bromide]]<br/>[[Europium(III) bromide]]
|   OtherCpds = 
  }}
}}
'''Promethium(III) bromide''', PmBr<sub>3</sub>, is the only known [[bromide]] of [[promethium]]. It is prepared (on a 100-µg scale) by reacting gaseous [[hydrogen bromide]] with [[promethium(III) oxide]] at 500&nbsp;°C, and has the [[plutonium tribromide structure]] with eight-coordinate promethium, isostructural with [[Neodymium(III) bromide|NdBr<sub>3</sub>]] and [[Samarium(III) bromide|SmBr<sub>3</sub>]].<ref name="Cotton"/> The solid reacts with [[water]] vapour on heating to form [[promethium oxobromide]], PmOBr.<ref name="thermo"/>

==Notes and references==
===Notes===
{{reflist|group=note}}

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

===Further reading===
*{{citation | first1 = W. R. | last1 = Wilmarth | first2 = G. M. | last2 = Begun | first3 = R. G. | last3 = Haire | first4 = J. R. | last4 = Peterson | title = Raman spectra of Pm<sub>2</sub>O<sub>3</sub>, PmF<sub>3</sub>, PmCl<sub>3</sub>, PmBr<sub>3</sub> and PmI<sub>3</sub> | journal = J. Raman Spectrosc. | volume = 19 | issue = 4 | pages = 271–75 | year = 1988 | doi = 10.1002/jrs.1250190410}}.

==External links==
*[http://www.webelements.com/compounds/promethium/promethium_tribromide.html WebElements]

[[Category:Promethium compounds]]
[[Category:Bromides]]

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