(Difference between pages)

Page 1

Page 1Revision 1

Page 2

Page 2Revision 2

Content deleted Content addedVisualWikitext

Revision as of 10:48, 16 February 2012 editBeetstra (talk | contribs)Edit filter managers, Administrators172,031 edits Saving copy of the {{chembox}} taken from revid 477038163 of page Selenium_tetrachloride for the Chem/Drugbox validation project (updated: 'CASNo').		Latest revision as of 05:50, 18 October 2024 edit 78.80.30.91 (talk)No edit summaryTags: Manual revert Mobile edit Mobile web edit
Line 1:		Line 1:
	{{ambox | text = This page contains a copy of the infobox ({{tl|chembox}}) taken from revid of page ] with values updated to verified values.}}
	{{chembox		{{chembox
	| Verifiedfields = changed		| Verifiedfields = changed
			| Watchedfields = changed
	| verifiedrevid = 476992638		| verifiedrevid = 477163163
	| Name = Selenium tetrachloride		| Name = Selenium tetrachloride
	| ImageFile1 = SeCl4-from-alpha-xtal-1981-CM-3D-ellipsoids.png		| ImageFile1 = SeCl4-from-alpha-xtal-1981-CM-3D-ellipsoids.png
	| ImageFile2 = TeCl4structure.jpg		| ImageFile2 = Selenium tetrachloride.png
	| ImageSize2 =		| ImageSize2 =
	| ImageName2 =		| ImageName2 =
	| IUPACName = Selenium tetrachloride		| IUPACName = Selenium tetrachloride
	| OtherNames =		| OtherNames = Selenium(IV) chloride, tetrachloro-λ<sup>4</sup>-selane
	| Section1 = {{Chembox Identifiers		| Section1 = {{Chembox Identifiers
		⚫	| CASNo_Ref = {{cascite|correct|CAS}}
		⚫	| CASNo = 10026-03-6
	| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}		| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
	| ChemSpiderID = 59590		| ChemSpiderID = 59590
			| EC_number = 233-053-5
		⚫	| RTECS = VS7875000
		⚫	| PubChem = 66205
			| UNII_Ref = {{fdacite|correct|FDA}}
			| UNII = 4GB8868P5J
	| InChI = 1/Cl4Se/c1-5(2,3)4		| InChI = 1/Cl4Se/c1-5(2,3)4
	| InChIKey = LNBXMNQCXXEHFT-UHFFFAOYAD		| InChIKey = LNBXMNQCXXEHFT-UHFFFAOYAD
Line 20:		Line 27:
	| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}		| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
	| StdInChIKey = LNBXMNQCXXEHFT-UHFFFAOYSA-N		| StdInChIKey = LNBXMNQCXXEHFT-UHFFFAOYSA-N
⚫	| CASNo_Ref = {{cascite|changed|??}}
⚫	| CASNo = <!-- blanked - oldvalue: 10026-03-6 -->
⚫	| RTECS = VS7875000
⚫	| PubChem = 66205
	}}		}}
	| Section2 = {{Chembox Properties		| Section2 = {{Chembox Properties
Line 29:		Line 32:
	| MolarMass = 220.771 g/mol		| MolarMass = 220.771 g/mol
	| Appearance = white to yellow crystals		| Appearance = white to yellow crystals
	| Density = 2.6 g/cm³, solid		| Density = 2.6 g/cm<sup>3</sup>, solid
	| Solubility = decomposes in water		| Solubility = decomposes in water
	| MeltingPt = ] at 191.4°C<ref name="hand">		| MeltingPt = ] at 191.4&nbsp;°C<ref name="hand">
	{{Cite book | last = Lide | first = David R. | year = 1998		{{Cite book | last = Lide | first = David R. | year = 1998
	| title = Handbook of Chemistry and Physics		| title = Handbook of Chemistry and Physics
	| edition = 87 | publication-place = Boca Raton, FL | publisher = CRC Press | isbn = 0849305942		| edition = 87 | location = Boca Raton, Florida | publisher = CRC Press | isbn = 0-8493-0594-2
	| pages = 487		| pages = 487
	| url = http://books.google.com/?id=lFjg0L-uOxoC&pg=PT872 | accessdate = 2008-07-02 | postscript = <!--None-->		| url = https://books.google.com/books?id=lFjg0L-uOxoC&pg=PT872 | access-date = 2008-07-02 }}</ref>
		⚫	| BoilingPt =
	}}</ref>
⚫	| BoilingPt =
	}}		}}
	| Section3 = {{Chembox Structure		| Section3 = {{Chembox Structure
	| CrystalStruct = ], ]		| CrystalStruct = ], ]
	| SpaceGroup = C12/c1, No. 15		| SpaceGroup = C12/c1, No. 15
	| MolShape = Seesaw (gas phase)		| MolShape = Seesaw (gas phase){{Citation needed|date=February 2012}}
	}}		}}
	| Section7 = {{Chembox Hazards		| Section7 = {{Chembox Hazards
	| NFPA-H = 3		| NFPA-H = 3
	| NFPA-F = 0		| NFPA-F = 0
	| NFPA-R = 0		| NFPA-R = 2
			| NFPA-S = W
	| EUClass = Toxic ('''T'''), Dangerous for the environment ('''N''')
	| RPhrases = {{R23/25}}, {{R33}}, {{R50/53}}		| GHSPictograms = {{GHS06}}{{GHS08}}{{GHS09}}
			| GHSSignalWord = Danger
	| SPhrases = {{S20/21}}, {{S28}}, {{S45}}, {{S60}}, {{S61}}<ref name="sa">
			| HPhrases = {{H-phrases|301|331|373|410}}
⚫	{{cite web |url= http://www.sigmaaldrich.com/catalog/search/ProductDetail/ALDRICH/323527/ |title= 323527 Selenium tetrachloride |accessdate=2008-07-02 |publisher= Sigma-Aldrich|date= }}</ref>
			| PPhrases = {{P-phrases|260|261|264|270|271|273|301+310|304+340|311|314|321|330|391|403+233|405|501}}
			| Hazards_ref=<ref name="sa">
		⚫	{{cite web |url= http://www.sigmaaldrich.com/catalog/search/ProductDetail/ALDRICH/323527/ |title= 323527 Selenium tetrachloride |access-date=2008-07-02 |publisher= Sigma-Aldrich}}</ref>
	| FlashPt = non-flammable		| FlashPt = non-flammable
	}}		}}
Line 58:		Line 63:
	| OtherAnions = ]<br />]<br />]		| OtherAnions = ]<br />]<br />]
	| OtherCations = ]<br />]<br />]		| OtherCations = ]<br />]<br />]
			| OtherCompounds = ]
	}}		}}
	}}		}}
			'''Selenium tetrachloride''' is the ] composed with the ] SeCl<sub>4</sub>. This compound exists as yellow to white volatile solid. It is one of two commonly available ], the other example being ], Se<sub>2</sub>Cl<sub>2</sub>. SeCl<sub>4</sub> is used in the synthesis of other ] compounds.
			==Synthesis and structure==
			]
			The compound is prepared by treating ] with ].<ref>{{Cite book | last1 = Nowak | first1 = H. G. | last2 = Suttle | first2 = J. F. | last3 = Parker | first3 = W. E. | last4 = Kleinberg | first4 = J. | chapter = Selenium (IV) Chloride | doi = 10.1002/9780470132364.ch33 | title = Inorganic Syntheses | volume = 5 | pages = 125 | year = 1957 | isbn = 9780470132364 }}</ref> When the reacting selenium is heated, the product ] from the reaction flask. The volatility of selenium tetrachloride can be exploited to purification of selenium.
			Solid SeCl<sub>4</sub> is actually a ]ic ], for which the Se atom of an SeCl<sub>6</sub> 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°.<ref>Kristallstruktur der stabilen Modifikation von SeCl4, Zeitschrift für Naturforschung, 36b, 1660, 1981</ref>
			SeCl<sub>4</sub> has often been used as an example for teaching ] rules of ]s. As such, one would predict four bonds but five electron groups giving rise to a ]. This clearly is not the case in the ]. Others have suggested that the crystal structure can be represented as SeCl<sub>3</sub><sup>+</sup> and Cl<sup>−</sup>. This formulation would predict a ] for the SeCl<sub>3</sub><sup>+</sup> 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 (SeCl<sub>4</sub>)<sub>4</sub>,<ref>Wells, ''Structural Inorganic Chemistry'', fifth ed, Oxford, p. 709, {{ISBN|0-19-855370-6}}</ref> with delocalized sigma bonding of the bridging chloride is clearly preferred over a "hypervalent" small molecule.
			Gaseous SeCl<sub>4</sub> contains SeCl<sub>2</sub> and chlorine, which recombine upon condensation.
			==Reactions==
			Selenium tetrachloride can be reduced in situ to the dichloride using ]:
			:SeCl<sub>4</sub> + SbPh<sub>3</sub> → SeCl<sub>2</sub> + Cl<sub>2</sub>SbPh<sub>3</sub>
			Selenium tetrachloride reacts with water to give ] and ] ]s:<ref name=Greenwood>{{Greenwood&Earnshaw2nd}}</ref>{{page needed|date=April 2013}}
			:SeCl<sub>4</sub> + 3 H<sub>2</sub>O → H<sub>2</sub>SeO<sub>3</sub> + 4 HCl
			Upon treatment with ], it gives ]:<ref name=Greenwood/>{{page needed|date=April 2013}}
			:SeCl<sub>4</sub> + SeO<sub>2</sub> → 2SeOCl<sub>2</sub>
			==References==
			{{Reflist}}
			{{Selenium compounds}}
			{{Chlorides}}
			{{Prostanoidergics}}
			]
			]
			]
			]
			]