Tellurium dichloride

Identifiers

CAS Number

* 10025-71-5 Y

3D model (JSmol)

* Interactive image

ChemSpider |

* 2588376

PubChem CID

* 3341691

UNII |

* 0T7J7SHH1H

InChI

* InChI=1S/Cl2Te/c1-3-2

Key: VXLPBEHPTWIBJR-UHFFFAOYSA-N

SMILES

* Cl[Te]Cl

Properties

Chemical formula

| Cl2Te
Molar mass | 198.50 g·mol−1
Appearance  | black solid[1]
Density | 6.9 g·cm−3[1]
Melting point | 208 °C[1]
Boiling point | 328 °C[1]

Solubility in water

| reacts[1]
Solubility | reacts with diethyl ether, insoluble in tetrachloromethane[1]
Related compounds

Other anions

| Ditellurium bromide, Te
2Br

Other cations

| Dichlorine monoxide, OCl

Sulfur dichloride, SCl

Selenium dichloride, SeCl

Polonium dichloride, PoCl

Related compounds

| Tritellurium dichloride, Te
3Cl

Tellurium tetrachloride, TeCl

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

Infobox references

Tellurium dichloride is a chloride of tellurium with the chemical formula TeCl2. It is a lightly characterized material that has attracted little attention.

## Preparation

Tellurium dichloride is claimed as the product of the reaction of tellurium with difluorodichloromethane.[2][3] It can also be produced by the comproportionation of tellurium and tellurium tetrachloride.[4]

## Properties

Tellurium dichloride is a black solid that reacts with water. It melts into a black liquid and vapourizes into a purple gas.[1][5] The gas consists of monomeric TeCl2 molecules with Te–Cl bond lengths of 2.329 Å and a Cl–Te–Cl bond angle of 97.0°.[5]

Tellurium dichloride (TeCl2) is unstable with respect to disproportionation.[5] Several complexes of it are known and well characterized. They are prepared by treating tellurium dioxide with hydrochloric acid in the presence of thioureas. The thiourea serves both as a ligand and as a reductant, converting Te(IV) to Te(II).

Although tellurium dichloride is lightly studied, molecular adducts of the title compound are well characterized.

Structure of trans-[TeCl2(SC(NMe2)2)2] (H atoms omitted).[6] Color code: green = Cl, dark gray = Te, yellow = S.

## References

1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Perry, Dale (2011). Handbook of Inorganic Compounds. Boca Raton, FL: CRC Press. ISBN 978-1-4398-1462-8. OCLC 759865801.
2. ↑ Gmelin, Leopold (1976) (in en, de). Tellurium. Springer-Verlag. OCLC 77834357.
3. ↑ Aynsley, E. E. (1953). "598. The preparation and properties of tellurium dichloride". Journal of the Chemical Society (Resumed) (Royal Society of Chemistry (RSC)): 3016. doi:10.1039/jr9530003016. ISSN 0368-1769.
4. ↑ Haaland, Arne (2008). Molecules and models : the molecular structures of main group element compounds. Oxford New York: Oxford University Press. ISBN 978-0-19-152860-6. OCLC 226969121.
5. ↑ 5.0 5.1 5.2 Fernholt, Liv; Haaland, Arne; Volden, Hans V.; Kniep, Rüdiger (1985). "The molecular structure of tellurium dichloride, TeCl2, determined by gas electron diffraction". Journal of Molecular Structure (Elsevier BV) 128 (1–3): 29–31. doi:10.1016/0022-2860(85)85037-7. ISSN 0022-2860. Bibcode: 1985JMoSt.128...29F.
6. ↑ Foss, O.; Maartmann-Moe, K. (1986). "Crystal and Molecular Structures of trans Square–Planar Complexes of Tellurium Dichloride, Dibromide and Diiodide with Tetramethylthiourea, TeL2X2. Bond Lengths in Centrosymmetric Tellurium(II) Complexes". Acta Chemica Scandinavica A 40: 675. doi:10.3891/acta.chem.scand.40a-0675.

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Tellurium compounds

* Te2Br
* TeBr4
* Te3Cl2
* TeCl4
* TeF4
* TeF6
* TeI4
* TeO
* TeO2
* TeO3
* TeN

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Salts and covalent derivatives of the chloride ion

HCl |  |  |  | He

|
|
|
|

LiCl | BeCl2 | BCl3
B2Cl4 | CCl4 | NCl3
ClN3 | Cl2O
ClO2
Cl2O7 | ClF
ClF3
ClF5 | Ne
NaCl | MgCl2 | AlCl
AlCl3 | SiCl4 | P2Cl4
PCl3
PCl5 | S2Cl2
SCl2
SCl4 | Cl2 | Ar
KCl | CaCl
CaCl2 | ScCl3 | TiCl2
TiCl3
TiCl4 | VCl2
VCl3
VCl4
VCl5 | CrCl2
CrCl3
CrCl4 | MnCl2 | FeCl2
FeCl3 | CoCl2
CoCl3 | NiCl2 | CuCl
CuCl2 | ZnCl2 | GaCl2
GaCl3 | GeCl2
GeCl4 | AsCl3
AsCl5 | Se2Cl2
SeCl4 | BrCl | KrCl
RbCl | SrCl2 | YCl3 | ZrCl3
ZrCl4 | NbCl4
NbCl5 | MoCl2
MoCl3
MoCl4
MoCl5
MoCl6 | TcCl4 | RuCl3 | RhCl3 | PdCl2 | AgCl | CdCl2 | InCl
InCl2
InCl3 | SnCl2
SnCl4 | SbCl3
SbCl5 | Te3Cl2
TeCl4 | ICl
ICl3 | XeCl
XeCl2
CsCl | BaCl2 |  | HfCl4 | TaCl5 | WCl2
WCl3
WCl4
WCl5
WCl6 | Re3Cl9
ReCl4
ReCl5
ReCl6 | OsCl4 | IrCl2
IrCl3
IrCl4 | PtCl2
PtCl4 | AuCl
AuCl3 | Hg2Cl2,
HgCl2 | TlCl | PbCl2,
PbCl4 | BiCl3 | PoCl2,
PoCl4 | AtCl  | RnCl2
FrCl | RaCl2 |  | Rf  | Db  | Sg  | Bh  | 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 | LuCl3
AcCl3 | ThCl4 | PaCl5 | UCl3
UCl4
UCl5
UCl6 | NpCl4 | PuCl3 | AmCl2
AmCl3 | CmCl3 | BkCl3 | CfCl3 | EsCl3 | Fm  | Md  | No  | LrCl3

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