Ytterbium(II) bromide

Names
Other names

Ytterbium dibromide

Identifiers

CAS Number

* 25502-05-0

3D model (JSmol)

* Interactive image

ChemSpider |

* 124564

PubChem CID

* 57376293

CompTox Dashboard (EPA)

* DTXSID20948399

InChI

* InChI=1S/2BrH.Yb/h2*1H;/q;;+2/p-2

Key: JLLHSFOQJNVQCV-UHFFFAOYSA-L

SMILES

* [Yb+2].[Br-].[Br-]

Properties

Chemical formula

| YbBr2
Molar mass | 332.84
Appearance  | pale yellow solid

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Infobox references

Chemical compound

Ytterbium(II) bromide is an inorganic compound with the chemical formula YbBr2.

## Preparation

[edit]

Ytterbium(II) bromide can be produced by the reduction reaction of ytterbium(III) bromide and hydrogen at 500~600 °C:[1]

2 YbBr3 \+ H2 → 2 YbBr2 \+ 2 HBr

The ammonia compound can be obtained by reacting metallic ytterbium and ammonium bromide in liquid ammonia at −78 °C. The ammonia compound can be decomposed in high vacuum at 200 °C to obtain ytterbium(II) bromide:[1]

Yb + 2 NH4Br → YbBr_2 \+ 2 NH3 \+ H2

Ytterbium(II) bromide can also be prepared by vacuum reduction of metallic ytterbium at 960 °C:[2]

Yb + 2 YbBr3 → 3 YbBr2

## Properties

[edit]

Ytterbium(II) bromide is a light yellow solid and is highly hygroscopic. It can only be stored in an inert atmosphere or high vacuum. It is unstable in air or moisture and rapidly converts to the oxybromide and releases hydrogen gas. Ytterbium(II) bromide belongs to the orthorhombic crystal system, with SrI2 structure and space group Pbca,[3] or CaCl2 structure and space group Pnnm. Its unit cell parameters are a=6.63 Å, b=6.93 Å, c=4.47Å.[1][3]

## References

[edit]

1. ^ a b c Handbuch der präparativen anorganischen Chemie. 1 (3., umgearb. Aufl ed.). Stuttgart: Enke. 1975. p. 1081\. ISBN 978-3-432-02328-1.
2. ^ Voos-Esquivel, Christine A.; Eick, Harry A. (Apr 1987). "Synthesis of YbBr2 and YbCl2 and an x-ray diffraction study of the system YbBr2YbCl2". Journal of Solid State Chemistry. 67 (2): 291–296. doi:10.1016/0022-4596(87)90366-5.
3. ^ a b Beck, Horst. P.; Bärnighausen, H. (Dec 1971). "Zur Kristallchemie der Ytterbium(II)-Halogenide YbCl 2 und YbBr 2". Zeitschrift für anorganische und allgemeine Chemie. 386 (2): 221–228. doi:10.1002/zaac.19713860214. ISSN 0044-2313.

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Ytterbium compounds

Yb(II)|

* YbF2
* YbCl2
* YbBr2
* YbI2
* YbH2
* YbS

Yb(III)|

* LaYbO3
* Yb(acac)3
* Yb(CH3COO)3
* YbBr3
* Yb(BrO3)3
* YbCl3
* Yb(CN)3
* YbF3
* Yb(OH)3
* Yb(IO3)3
* YbI3
* Yb(NO3)3
* YbN
* Yb2(C2O4)3
* Yb2O3
* YbP
* Yb2(SO4)3
* Yb

Other|

* YbRh2Si2
* Yb:LuVO4
* YbBiPt
* YbGaGe

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Salts and covalent derivatives of the bromide ion

| HBr |  |  |  | He

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LiBr | BeBr2 | BBr3
+BO3 | CBr4
+C | NBr3
BrN3
NH4Br
NOBr
+N | Br2O
BrO2
Br2O3
Br2O5 | BrF
BrF3
BrF5 | Ne
NaBr | MgBr2 | AlBr
AlBr3 | SiBr4 | PBr3
PBr5
PBr7
+P | S2Br2
SBr2 | BrCl | Ar
KBr | CaBr2
|  | ScBr3 | TiBr2
TiBr3
TiBr4 | VBr2
VBr3 | CrBr2
CrBr3
CrBr4 | MnBr2 | FeBr2
FeBr3 | CoBr2 | NiBr2
NiBr42− | CuBr
CuBr2 | ZnBr2 | GaBr3 | GeBr2
GeBr4 | AsBr3
+As
+AsO3 | SeBr2
SeBr4 | Br2 | Kr
RbBr | SrBr2 |  | YBr3 | ZrBr2
ZrBr3
ZrBr4 | NbBr5 | MoBr2
MoBr3
MoBr4 | TcBr3
TcBr4 | RuBr3 | RhBr3 | PdBr2 | AgBr | CdBr2 | InBr
InBr3 | SnBr2
SnBr4 | SbBr3
+Sb
-Sb | Te2Br
TeBr4
+Te | IBr
IBr3 | XeBr2
CsBr | BaBr2 | *  | LuBr3 | HfBr4 | TaBr5 | WBr5
WBr6 | ReBr3 | OsBr3
OsBr4 | IrBr3
IrBr
4 | PtBr2
PtBr4 | AuBr
AuBr3 | Hg2Br2
HgBr2 | TlBr | PbBr2 | BiBr3 | PoBr2
PoBr4 | AtBr | Rn
FrBr | RaBr2 | **  | Lr  | Rf  | Db  | Sg  | Bh  | Hs  | Mt  | Ds  | Rg  | Cn  | Nh  | Fl  | Mc  | Lv  | Ts  | Og

*  | LaBr3 | CeBr3 | PrBr3 | NdBr2
NdBr3 | PmBr3 | SmBr2
SmBr3 | EuBr2
EuBr3 | GdBr3 | TbBr3 | DyBr3 | HoBr3 | ErBr3 | TmBr2
TmBr3 | YbBr2
YbBr3
**  | AcBr3 | ThBr4 | PaBr4
PaBr5 | UBr4
UBr5 | NpBr3
NpBr4 | PuBr3 | AmBr2
AmBr3 | CmBr3 | BkBr3 | CfBr3 | EsBr2
EsBr3 | Fm  | Md  | No

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Halides of lanthanides

|  | La | Ce | Pr | Nd | Pm | Sm | Eu | Gd | Tb | Dy | Ho | Er | Tm | Yb | Lu

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+4  |  | CeF4 | PrF4 | NdF4 |  |  |  |  | TbF4 | DyF4 |  |  |  |  |
+3  | LaF3
LaCl3
LaBr3
LaI3 | CeF3
CeCl3
CeBr3
CeI3 | PrF3
PrCl3
PrBr3
PrI3 | NdF3
NdCl3
NdBr3
NdI3 | PmF3
PmCl3
PmBr3
PmI3 | SmF3
SmCl3
SmBr3
SmI3 | EuF3
EuCl3
EuBr3
EuI3 | GdF3
GdCl3
GdBr3
GdI3 | TbF3
TbCl3
TbBr3
TbI3 | DyF3
DyCl3
DyBr3
DyI3 | HoF3
HoCl3
HoBr3
HoI3 | ErF3
ErCl3
ErBr3
ErI3 | TmF3
TmCl3
TmBr3
TmI3 | YbF3
YbCl3
YbBr3
YbI3 | LuF3
LuCl3
LuBr3
LuI3
+2  | LaI2 | CeI2 | PrI2 | NdF2
NdCl2
NdBr2
NdI2 |  | SmF2
SmCl2
SmBr2
SmI2 | EuF2
EuCl2
EuBr2
EuI2 | GdI2 |  | DyF2
DyCl2
DyBr2
DyI2 |  |  | TmF2
TmCl2
TmBr2
TmI2 | YbF2
YbCl2
YbBr2
YbI2 |
*[CID]: Compound ID
*[EPA]: U.S. Environmental Protection Agency
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