Samarium(II) chloride

Samarium(II) chloride  Names

IUPAC name

Samarium(II) chloride

Other names

Samarium dichloride

Identifiers

CAS Number

* 13874-75-4 N

3D model (JSmol)

* Interactive image

ChemSpider |

* 4908199 Y

ECHA InfoCard | 100.034.196
EC Number |

* 237-631-8

PubChem CID

* 6393953

CompTox Dashboard (EPA)

* DTXSID30930205

InChI

* InChI=1S/2ClH.Sm/h2*1H;/q;;+2/p-2 Y

Key: VPRJMFJPKMESHB-UHFFFAOYSA-L Y

* InChI=1/2ClH.Sm/h2*1H;/q;;+2/p-2

Key: VPRJMFJPKMESHB-NUQVWONBAS

SMILES

* Cl[Sm]Cl

Properties

Chemical formula

| SmCl2
Molar mass | 221.27 g/mol
Appearance  | dark brown crystals[1]
Density | 3.69 g/cm3, solid
Melting point | 855 °C (1,571 °F; 1,128 K)
Boiling point | 1,310 °C (2,390 °F; 1,580 K)

Solubility in water

| ?
Structure

Crystal structure

| Orthorhombic

Space group

| Pbnm, No. 62[2]
Related compounds

Other anions

| Samarium(II) bromide
Samarium(II) iodide

Other cations

| Samarium(III) chloride

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

N verify (what is YN ?)

Infobox references

Chemical compound

Samarium(II) chloride (SmCl2) is a chemical compound, used as a radical generating agent in the ketone-mediated intraannulation reaction.

## Preparation[edit]

Reduction of samarium(III) chloride with samarium metal in a vacuum at a temperature of 800 °C to 900 °C, or with hydrogen gas at 350 °C yields samarium(II) chloride:[1]

2 SmCl3 \+ Sm → 3 SmCl2

2 SmCl3 \+ H2 → 2 SmCl2 \+ 2 HCl

Samarium(II) chloride can also be prepared by reducing samarium(III) chloride with lithium metal/naphthalene in THF:[3]

SmCl3 \+ Li → SmCl2 \+ LiCl

A similar reaction has been observed with sodium.[2]

## Structure[edit]

Samarium(II) chloride adopts the PbCl2 (cotunnite) structure.[2]

## References[edit]

1. ^ a b Brauer, Georg; Baudler, Marianne (1975). Handbuch der Präparativen Anorganischen Chemie, Band I. (3rd ed.). Stuttgart: Ferdinand Enke. ISBN 3-432-02328-6.
2. ^ a b c Meyer, Gerd; Schleid, Thomas (1986-02-01). "The metallothermic reduction of several rare-earth trichlorides with lithium and sodium". Journal of the Less Common Metals. 116 (1): 187–197. doi:10.1016/0022-5088(86)90228-6.
3. ^ Rossmainth, Kurt (1979-01-01). "Herstellung der klassischen Seltenerd(II)-chloride in Lösung" [Preparation of the classical rare earth(II) chlorides in solution]. Anorganische, Struktur- und Physikalische Chemie. 110 (4): 109–114. doi:10.1007/BF00903752.

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Samarium compounds

Samarium(II)|

* PtSm
* SmF2
* SmCl2
* SmBr2
* SmB6
* SmI2
* SmS
* SmSe
* SmP
* SmTe

Samarium(III)|

* Sm(CH3COO)3
* SmAs
* SmCl3
* SmBr3
* SmF3
* SmI3
* Sm2O3
* Sm2S3
* Sm(OH)3
* Sm(NO3)3

| Organosamarium(III)|

* Sm2(C2O4)3

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Salts and covalent derivatives of the chloride ion

| HCl |  |  |  | He

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LiCl | BeCl2 | B4Cl4
B12Cl12
BCl3
B2Cl4 | C2Cl2
C2Cl4
C2Cl6
CCl4
+C | NCl3
ClN3
+N | ClxOy
Cl2O
Cl2O2
ClO
ClO2
Cl2O4
Cl2O6
Cl2O7
ClO4
+O | ClF
ClF3
ClF5 | Ne
NaCl | MgCl2 | AlCl
AlCl3 | Si5Cl12
Si2Cl6
SiCl4 | P2Cl4
PCl3
PCl5
+P | S2Cl2
SCl2
SCl4 | Cl2 | Ar
KCl | CaCl
CaCl2 |  | ScCl3 | TiCl2
TiCl3
TiCl4 | VCl2
VCl3
VCl4
VCl5 | CrCl2
CrCl3
CrCl4 | MnCl2
MnCl3
MnCl4 | FeCl2
FeCl3 | CoCl2
CoCl3 | NiCl2 | CuCl
CuCl2 | ZnCl2 | GaCl
GaCl3 | GeCl2
GeCl4 | AsCl3
AsCl5
+As | Se2Cl2
SeCl2
SeCl4 | BrCl | Kr
RbCl | SrCl2 |  | YCl3 | ZrCl3
ZrCl4 | NbCl3
NbCl4
NbCl5 | MoCl2
MoCl3
MoCl4
MoCl5
MoCl6 | TcCl3
TcCl4 | RuCl2
RuCl3
RuCl4 | RhCl3 | PdCl2 | AgCl | CdCl2 | InCl
InCl2
InCl3 | SnCl2
SnCl4 | SbCl3
SbCl5 | Te3Cl2
TeCl2
TeCl4 | ICl
ICl3 | XeCl
XeCl2
XeCl4
CsCl | BaCl2 | *  | LuCl3 | HfCl4 | TaCl5 | WCl2
WCl3
WCl4
WCl5
WCl6 | ReCl3
ReCl4
ReCl5
ReCl6 | OsCl2
OsCl3
OsCl4
OsCl5 | IrCl2
IrCl3
IrCl4 | PtCl2
PtCl4 | AuCl
(Au[AuCl4])2
AuCl3 | Hg2Cl2
HgCl2 | TlCl
TlCl3 | PbCl2
PbCl4 | BiCl3 | PoCl2
PoCl4 | AtCl | Rn
FrCl | RaCl2 | **  | LrCl3 | RfCl4 | DbCl5 | SgO2Cl2 | BhO3Cl | Hs  | Mt  | Ds  | Rg  | Cn  | Nh  | Fl  | Mc  | Lv  | Ts  | Og

*  | LaCl3 | CeCl3 | PrCl3 | NdCl2
NdCl3 | PmCl3 | SmCl2
SmCl3 | EuCl2
EuCl3 | GdCl3 | TbCl3 | DyCl2
DyCl3 | HoCl3 | ErCl3 | TmCl2
TmCl3 | YbCl2
YbCl3
**  | AcCl3 | ThCl4 | PaCl4
PaCl5 | UCl3
UCl4
UCl5
UCl6 | NpCl3 | PuCl3 | AmCl2
AmCl3 | CmCl3 | BkCl3 | CfCl3 | EsCl3 | FmCl2 | MdCl2 | NoCl2

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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 |

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