Selenium dichloride

Selenium dichloride
Identifiers
CAS Number	14457-70-6;
3D model (JSmol)	Interactive image;
ChemSpider	123257;
PubChem CID	139762;
UNII	PDE7WQS0XY;
CompTox Dashboard (EPA)	DTXSID80162756 ;
	InChI InChI=1S/Cl2Se/c1-3-2 Key: SWAKCLHCWHYEOW-UHFFFAOYSA-N;
	SMILES Cl[Se]Cl;
Properties
Chemical formula	Cl2Se
Molar mass	149.87 g·mol−1
Related compounds
Other anions	Selenium dibromide, SeBr2
Other cations	Sulfur dichloride, SCl2; Tellurium dichloride, TeCl2; Polonium dichloride, PoCl2
Related compounds	Selenium tetrachloride, SeCl4
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Selenium dichloride is the inorganic compound with the formula SeCl₂. It forms red-brown solutions in ethers. Selenium dichloride has been prepared by treating gray selenium with sulfuryl chloride. Adducts of selenium dichloride with thioethers and thioureas are well characterized. Related complexes of tellurium dichloride are known.

Solutions of selenium dichloride are unstable at room temperature, forming selenium monochloride after several minutes at room temperature:^[2]

3 SeCl₂ → Se₂Cl₂ + SeCl₄

References

^ Jolleys, A.; Levason, W.; Reid, G. (2013). "Thioether Coordination to Divalent Selenium Halide Acceptors – Synthesis, Properties and Structures". Dalton Transactions. 42 (8): 2963–2972. doi:10.1039/C2DT32665E. PMID 23250231.
^ Maaninen, Arto; Chivers, Tristram; Parvez, Masood; Pietikäinen, Jarkko; Laitinen, Risto S. (1999). "Syntheses of THF Solutions of SeX₂ (X = Cl, Br) and a New Route to Selenium Sulfides Se_nS_8−n (n = 1-5): X-Ray Crystal Structures of SeCl₂(tht)₂ and SeCl₂·tmtu". Inorganic Chemistry. 38: 4093–4097. doi:10.1021/ic981430h.

v t e Selenium compounds
Se(−II)	Se²⁻ H₂Se Al₂Se₃ Sb₂Se₃ As₂Se₃ Bi₂Se₃ CdSe CaSe CSe₂ OCSe CrSe CoSe CuSe (CH₃)₂Se GaSe Ga₂Se₃ GeSe In₂Se₃ FeSe PbSe MgSe MnSe MnSe₂ HgSe MoSe₂ NiSe NbSe₂ NbSe₃ P_xSe_y PuSe ReSe₂ Sm₂Se₃ Ag₂Se Na₂Se SnSe TiSe₂ WSe₂ USe₂ ZnSe
Se(0,I)	Se₃S₅
Se(I)	Se₂S₆ Se₂Cl₂ C₃H₇NO₂Se
Se(II)	SeBr₂ SeCl₂ SeS₂
Se(IV)	SeO2−3 SeBr₄ SeCl₄ SeF₄ SeO₂ SeS₂ SeOBr₂ SeOCl₂ H₂SeO₃
Se(VI)	SeO2−4 SeF₆ SeO₃ SeO₂F₂ H₂SeO₄
Se(IV,VI)	SeO2−4 + SeO2−3

Identifiers
CAS Number	14457-70-6
3D model (JSmol)	Interactive image
ChemSpider	123257
PubChem CID	139762
UNII	PDE7WQS0XY
CompTox Dashboard (EPA)	DTXSID80162756
InChI InChI=1S/Cl2Se/c1-3-2 Key: SWAKCLHCWHYEOW-UHFFFAOYSA-N
SMILES Cl[Se]Cl
Properties
Chemical formula	Cl₂Se
Molar mass	149.87 g·mol⁻¹
Related compounds
Other anions	Selenium dibromide, SeBr₂
Other cations	Sulfur dichloride, SCl₂ Tellurium dichloride, TeCl₂ Polonium dichloride, PoCl₂
Related compounds	Selenium tetrachloride, SeCl₄
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references