Selenium tetrachloride

Names
IUPAC name

Selenium tetrachloride

Other names

Selenium(IV) chloride, tetrachloro-λ4-selane

Identifiers

CAS Number

* 10026-03-6 Y

3D model (JSmol)

* Interactive image

ChemSpider |

* 59590 Y

EC Number |

* 233-053-5

PubChem CID

* 66205

RTECS number |

* VS7875000

UNII |

* 4GB8868P5J Y

InChI

* InChI=1S/Cl4Se/c1-5(2,3)4 Y

Key: LNBXMNQCXXEHFT-UHFFFAOYSA-N Y

* InChI=1/Cl4Se/c1-5(2,3)4

Key: LNBXMNQCXXEHFT-UHFFFAOYAD

SMILES

* Cl[Se](Cl)(Cl)Cl

Properties

Chemical formula

| SeCl4
Molar mass | 220.771 g/mol
Appearance  | white to yellow crystals
Density | 2.6 g/cm3, solid
Melting point | sublimes at 191.4 °C[1]

Solubility in water

| decomposes in water
Structure

Crystal structure

| Monoclinic, mS80

Space group

| C12/c1, No. 15

Molecular shape

| Seesaw (gas phase)[citation needed]
Hazards[2]
GHS pictograms |
GHS Signal word | Danger

GHS hazard statements

| H301, H331, H373, H410

GHS precautionary statements

| P260, P261, P264, P270, P271, P273, P301+310, P304+340, P311, P314, P321, P330, P391, P403+233, P405, P501
NFPA 704 (fire diamond)  |

~~W~~

Flash point | non-flammable
Related compounds

Other anions

| Selenium tetrafluoride
Selenium tetrabromide
Selenium dioxide

Other cations

| Dichlorine monoxide
Sulfur tetrachloride
Tellurium tetrachloride

Related compounds

| Selenium dichloride

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

Selenium tetrachloride is the inorganic compound composed with the formula SeCl4. This compound exists as yellow to white volatile solid. It is one of two commonly available selenium chlorides, the other example being selenium monochloride, Se2Cl2. SeCl4 is used in the synthesis of other selenium compounds.

## Synthesis and structure

Structure of selenium tetrachloride

The compound is prepared by treating selenium with chlorine.[3] When the reacting selenium is heated, the product sublimes from the reaction flask. The volatility of selenium tetrachloride can be exploited to purification of selenium.

Solid SeCl4 is actually a tetrameric cubane-type cluster, for which the Se atom of an SeCl6 octahedron sits on four corners of the cube and the bridging Cl atoms sit on the other four corners. The bridging Se-Cl distances are longer than the terminal Se-Cl distances, but all Cl-Se-Cl angles are approximately 90°.[4]

SeCl4 has often been used as an example for teaching VSEPR rules of hypervalent molecules. As such, one would predict four bonds but five electron groups giving rise to a seesaw geometry. This clearly is not the case in the crystal structure. Others have suggested that the crystal structure can be represented as SeCl3+ and Cl−. This formulation would predict a pyramidal geometry for the SeCl3+ cation with a Cl-Se-Cl bond angle of approximately 109°. However, this molecule is an excellent example of a situation where maximal bonding cannot be achieved with the simplest molecular formula. The formation of the tetramer (SeCl4)4,[5] with delocalized sigma bonding of the bridging chloride is clearly preferred over a "hypervalent" small molecule. Gaseous SeCl4 contains SeCl2 and chlorine, which recombine upon condensation.

## Reactions

Selenium tetrachloride can be reduced in situ to the dichloride using triphenylstibine:

SeCl4 \+ SbPh3 → SeCl2 \+ Cl2SbPh3

Selenium tetrachloride reacts with water to give selenous and hydrochloric acids:[6][page needed]

SeCl4 \+ 3 H2O → H2SeO3 \+ 4 HCl

Upon treatment with selenium dioxide, it gives selenium oxychloride:[6][page needed]

SeCl4 \+ SeO2 → 2SeOCl2

## References

1. ↑ Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, Florida: CRC Press. pp. 487. ISBN 0-8493-0594-2. https://books.google.com/books?id=lFjg0L-uOxoC&pg=PT872. Retrieved 2008-07-02.
2. ↑ "323527 Selenium tetrachloride". Sigma-Aldrich. http://www.sigmaaldrich.com/catalog/search/ProductDetail/ALDRICH/323527/.
3. ↑ Nowak, H. G.; Suttle, J. F.; Parker, W. E.; Kleinberg, J. (1957). "Selenium (IV) Chloride". Inorganic Syntheses. 5. pp. 125. doi:10.1002/9780470132364.ch33. ISBN 9780470132364.
4. ↑ Kristallstruktur der stabilen Modifikation von SeCl4, Zeitschrift für Naturforschung, 36b, 1660, 1981
5. ↑ Wells, Structural Inorganic Chemistry, fifth ed, Oxford, p. 709, ISBN 0-19-855370-6
6. ↑ 6.0 6.1 Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.

* v
* t
* e

Selenium compounds

Se(−II)|

* Ag2Se
* Al2Se3
* CaSe
* Se2−

Se(0,I)|

* Se3S5

Se(I)|

* Se2S6
* Se2Cl2
* C3H7NO2Se

Se(II)|

* SeS2

Se(IV)|

* SeCl4
* SeF4
* SeO2
* SeS2
* SeOBr2
* SeOCl2

Se(VI)|

* SeF6
* SeO3
* SeO2F2

* v
* t
* e

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

* v
* t
* e

Prostanoid signaling modulators

Receptor
(ligands)|

| DP (D2)|

| DP1|

* Agonists: Prostaglandin D2
* Treprostinil

* Antagonists: Asapiprant
* Laropiprant
* Vidupiprant

|

DP2|

* Agonists: Indometacin
* Prostaglandin D2

* Antagonists: ADC-3680
* AZD-1981
* Bay U3405
* Fevipiprant
* MK-1029
* MK-7246
* QAV-680
* Ramatroban
* Setipiprant
* Timapiprant
* TM30089
* Vidupiprant

EP (E2)|

| EP1|

* Agonists: Beraprost
* Enprostil
* Iloprost (ciloprost)
* Latanoprost
* Lubiprostone
* Misoprostol
* Prostaglandin E1 (alprostadil)
* Prostaglandin E2 (dinoprostone)
* Sulprostone

* Antagonists: AH-6809
* ONO-8130
* SC-19220
* SC-51089
* SC-51322

|

EP2|

* Agonists: Butaprost
* Misoprostol
* Prostaglandin E1 (alprostadil)
* Prostaglandin E2 (dinoprostone)
* Treprostinil

* Antagonists: AH-6809
* PF-04418948
* TG 4-155

EP3|

* Agonists: Beraprost
* Carbacyclin
* Cicaprost
* Enprostil
* Iloprost (ciloprost)
* Isocarbacyclin
* Latanoprost
* Misoprostol
* Prostaglandin D2
* Prostaglandin E1 (alprostadil)
* Prostaglandin E2 (dinoprostone)
* Remiprostol
* Sulprostone

* Antagonists: L-798106

EP4|

* Agonists: Lubiprostone
* Misoprostol
* Prostaglandin E1 (alprostadil)
* Prostaglandin E2 (dinoprostone)
* TCS-2510

* Antagonists: Grapiprant
* GW-627368
* L-161982
* ONO-AE3-208

Unsorted|

* Agonists: 16,16-Dimethyl Prostaglandin E2
* Aganepag
* Carboprost
* Evatanepag
* Gemeprost
* Nocloprost
* Omidenepag
* Prostaglandin F2α (dinoprost)
* Simenepag
* Taprenepag

FP (F2α)|

* Agonists: Alfaprostol
* Bimatoprost
* Carboprost
* Cloprostenol
* Enprostil
* Fluprostenol
* Latanoprost
* Prostaglandin D2
* Prostaglandin F2α (dinoprost)
* Sulotroban
* Tafluprost
* Travoprost
* Unoprostone

IP (I2)|

* Agonists: ACT-333679
* AFP-07
* Beraprost
* BMY-45778
* Carbacyclin
* Cicaprost
* Iloprost (ciloprost)
* Isocarbacyclin
* MRE-269
* NS-304
* Prostacyclin (prostaglandin I2, epoprostenol)
* Prostaglandin E1 (alprostadil)
* Ralinepag
* Selexipag
* Taprostene
* TRA-418
* Treprostinil

* Antagonists: RO1138452

TP (TXA2)|

* Agonists: Carbocyclic thromboxane A2
* I-BOP
* Thromboxane A2
* U-46619
* Vapiprost

* Antagonists: 12-HETE
* 13-APA
* AA-2414
* Argatroban
* Bay U3405
* BMS-180,291
* Daltroban
* Domitroban
* EP-045
* GR-32191
* ICI-185282
* ICI-192605
* Ifetroban
* Imitrodast
* L-655240
* L-670596
* Linotroban
* Mipitroban
* ONO-3708
* ONO-11120
* Picotamide
* Pinane thromboxane A2
* Ramatroban
* Ridogrel
* S-145
* Samixogrel
* Seratrodast
* SQ-28,668
* SQ-29,548
* Sulotroban
* Terbogrel
* Terutroban
* TRA-418

Unsorted|

* Arbaprostil
* Ataprost
* Ciprostene
* Clinprost
* Cobiprostone
* Delprostenate
* Deprostil
* Dimoxaprost
* Doxaprost
* Ecraprost
* Eganoprost
* Enisoprost
* Eptaloprost
* Esuberaprost
* Etiproston
* Fenprostalene
* Flunoprost
* Froxiprost
* Lanproston
* Limaprost
* Luprostiol
* Meteneprost
* Mexiprostil
* Naxaprostene
* Nileprost
* Nocloprost
* Ornoprostil
* Oxoprostol
* Penprostene
* Pimilprost
* Piriprost
* Posaraprost
* Prostalene
* Rioprostil
* Rivenprost
* Rosaprostol
* Spiriprostil
* Tiaprost
* Tilsuprost
* Tiprostanide
* Trimoprostil
* Viprostol

Enzyme
(inhibitors)|

| COX
(PTGS)|

* Salicylic acids: Aloxiprin
* Aspirin (acetylsalicylic acid)
* Benorilate (benorylate)
* Carbasalate calcium
* Diflusinal
* Dipyrocetyl
* Ethenzamide
* Guacetisal
* Magnesium salicylate
* Mesalazine (5-aminosalicylic acid)
* Methyl salicylate
* Salacetamide
* Salicin
* Salicylamide
* Salicylate (salicylic acid)
* Salsalate
* Sodium salicylate
* Triflusal; Acetic acids: Aceclofenac
* Acemetacin
* Aclofenac
* Amfenac
* Alclofenac
* Bendazac
* Bromfenac
* Bufexamac
* Bumadizone
* Cinmetacin
* Clometacin
* Diclofenac
* Difenpiramide
* Etodolac
* Felbinac
* Fenclofenac
* Fentiazac
* Glucametacin
* Indometacin (indomethacin)
* Indometacin farnesil
* Ketorolac
* Lonazolac
* Mofezolac
* Nabumetone
* Oxametacin
* Oxindanac
* Proglumetacin
* Sulindac
* Sulindac sulfide
* Tolmetin
* Zidometacin
* Zomepirac; Propionic acids: Alminoprofen
* Benoxaprofen
* Bucloxic acid (blucloxate)
* Butibufen
* Carprofen
* Dexibuprofen
* Dexindoprofen
* Dexketoprofen
* Fenbufen
* Fenoprofen
* Flunoxaprofen
* Flurbiprofen
* Ibuprofen
* Ibuproxam
* Indoprofen
* Ketoprofen
* Loxoprofen
* Miroprofen
* Naproxen
* Naproxcinod
* Oxaprozin
* Pirprofen
* Pranoprofen
* Suprofen
* Tarenflurbil
* Tepoxalin
* Tiaprofenic acid (tiaprofenate)
* Vedaprofen; Anthranilic acids (fenamic acids): Etofenamic acid (etofenamate)
* Floctafenic acid (floctafenate)
* Flufenamic acid (flufenamate)
* Meclofenamic acid (meclofenamate)
* Mefenamic acid (mefenamate)
* Morniflumic acid (morniflumate)
* Niflumic acid (niflumate)
* Talinflumic acid (talinflumate)
* Tolfenamic acid (tolfenamate); Pyrazolones: Azapropazone
* Dipyrone
* Isopyrin
* Oxyphenbutazone
* Phenylbutazone; Enolic acids (oxicams): Ampiroxicam
* Droxicam
* Enolicam
* Isoxicam
* Lornoxicam
* Meloxicam
* Piroxicam
* Tenoxicam; 4-Aminoquinolines: Antrafenine
* Floctafenine
* Glafenine; Quinazolines: Fluproquazone
* Proquazone; Aminonicotinic acids: Clonixeril
* Clonixin
* Flunixin; Sulfonanilides: Flosulide
* Nimesulide; Aminophenols (anilines): Acetanilide
* AM-404 (N-arachidonoylaminophenol)
* Bucetin
* Paracetamol (acetaminophen)
* Parapropamol
* Phenacetin
* Propacetamol; Selective COX-2 inhibitors (coxibs): Apricoxib
* Celecoxib
* Cimicoxib
* Deracoxib
* Etoricoxib
* Firocoxib
* Lumiracoxib
* Mavacoxib
* Parecoxib
* Polmacoxib
* Robenacoxib
* Rofecoxib
* Tilmacoxib
* Valdecoxib; Others/unsorted: Anitrazafen
* Clobuzarit
* Curcumin
* DuP-697
* FK-3311
* Flumizole
* FR-122047
* Glimepiride
* Hyperforin
* Itazigrel
* L-655240
* L-670596
* Licofelone
* Menatetrenone (vitamin K2)
* NCX-466
* NCX-4040
* NS-398
* Pamicogrel
* Resveratrol
* Romazarit
* Rosmarinic acid
* Rutecarpine
* Satigrel
* SC-236
* SC-560
* SC-58125
* Tenidap
* Tiflamizole
* Timegadine
* Trifenagrel
* Tropesin

|

PGD2S|

* Retinoids
* Selenium (selenium tetrachloride, sodium selenite, selenium disulfide)

PGES|

HQL-79

PGFS|

Bimatoprost

PGI2S|

Tranylcypromine

TXAS|

* Camonagrel
* Dazmegrel
* Dazoxiben
* Furegrelate
* Isbogrel
* Midazogrel
* Nafagrel
* Nicogrelate
* Ozagrel
* Picotamide
* Pirmagrel
* Ridogrel
* Rolafagrel
* Samixogrel
* Terbogrel
* U63557A

Others|

* Precursors: Linoleic acid
* γ-Linolenic acid (gamolenic acid)
* Dihomo-γ-linolenic acid
* Diacylglycerol
* Arachidonic acid
* Prostaglandin G2
* Prostaglandin H2

See also
Receptor/signaling modulators
Leukotriene signaling modulators
Nuclear receptor modulators

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Original source: https://en.wikipedia.org/wiki/Selenium tetrachloride. Read more

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Retrieved from "https://handwiki.org/wiki/index.php?title=Chemistry:Selenium_tetrachloride&oldid=538983"
*[CID]: Compound ID
*[H301]: Toxic if swallowed
*[H331]: Toxic if inhaled
*[H373]: May cause damage to organs through prolonged or repeated exposure
*[H410]: Very toxic to aquatic life with long lasting effects
*[P260]: Do not breathe dust/fume/gas/mist/vapours/spray
*[P261]: Avoid breathing dust/fume/gas/mist/vapours/spray
*[P264]: Wash … thoroughly after handling
*[P270]: Do not eat, drink or smoke when using this product
*[P271]: Use only outdoors or in a well-ventilated area
*[P273]: Avoid release to the environment
*[P301+310]: IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
*[P304+340]: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
*[P311]: Call a POISON CENTER or doctor/physician
*[P314]: Get Medical advice/attention if you feel unwell
*[P321]: Specific treatment (see … on this label)
*[P330]: Rinse mouth
*[P391]: Collect spillage
*[P403+233]: Store in a well ventilated place. Keep container tightly closed
*[P405]: Store locked up
*[P501]: Dispose of contents/container to …
*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template
*[DP (D2)]: Prostaglandin D2 receptor
*[DP1]: Prostaglandin D2 receptor 1
*[DP2]: Prostaglandin D2 receptor 2
*[EP (E2)]: Prostaglandin E2 receptor
*[EP1]: Prostaglandin EP1 receptor
*[EP2]: Prostaglandin EP2 receptor
*[EP3]: Prostaglandin EP3 receptor
*[EP4]: Prostaglandin EP4 receptor
*[FP (F2α)]: Prostaglandin F receptor
*[IP (I2)]: Prostacyclin receptor
*[TP (TXA2)]: Thromboxane receptor
*[COX]: Cyclooxygenase
*[PTGS]: prostaglandin G/H synthase
*[PGD2S]: Prostaglandin D synthase
*[PGES]: Prostaglandin E synthase
*[PGFS]: Prostaglandin F synthase
*[PGI2S]: Prostacyclin synthase
*[TXAS]: Thromboxane A synthase