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{{chembox |
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| ImageFile = TcCl4structure.jpg |
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| verifiedrevid = 406189912 |
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| ImageFile = TcCl4.svg |
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| IUPACName = Technetium(IV) chloride |
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| IUPACName = Technetium(IV) chloride |
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| OtherNames = Technetium tetrachloride, Technetium chloride |
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| OtherNames = Technetium tetrachloride, Technetium chloride |
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| Section1 = {{Chembox Identifiers |
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|Section1={{Chembox Identifiers |
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| Abbreviations = |
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| Abbreviations = |
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| CASNo_Ref = {{cascite|correct|CAS}} |
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| CASNo = 14215-13-5 |
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| CASNo = 14215-13-5 |
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| ChemSpiderID = 73944719 |
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| EINECS = |
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| EINECS = |
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| PubChem = |
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| PubChem = 23047010 |
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| StdInChI=1S/4ClH.Tc/h4*1H;/q;;;;+4/p-4 |
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| ATC_Supplemental =}} |
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| StdInChIKey = DCEWLADEQKZQQZ-UHFFFAOYSA-J |
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| Section2 = {{Chembox Properties |
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| SMILES = .... |
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|Section2={{Chembox Properties |
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| Formula = TcCl<sub>4</sub> |
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| Formula = TcCl<sub>4</sub> |
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| MolarMass = 239.718 g/mol |
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| MolarMass = 239.718 g/mol |
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| Appearance = |
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| Appearance = Red solid |
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| Density = |
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| Density = |
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| MeltingPt = |
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| MeltingPt = |
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| BoilingPt = 300 °C<ref name="web">{{RubberBible86th}}</ref> |
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| BoilingPtC = 300 |
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| BoilingPt_ref = <ref name="web">{{RubberBible86th}}</ref> |
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| Section3 = {{Chembox Structure |
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|Section3={{Chembox Structure |
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| CrystalStruct = ], ] |
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| CrystalStruct = ], ] |
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| SpaceGroup = Pbca, No. 61 |
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| SpaceGroup = Pbca, No. 61 |
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| Coordination = |
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| Coordination = |
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| LattConst_a = 0.603 nm |
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| LattConst_a = 0.603 nm |
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| Section4 = {{Chembox Thermochemistry |
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| Section7 = {{Chembox Hazards |
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| OtherCations = ]<br />]<br/>] |
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| OtherCations = ]<br />]<br/>] |
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'''Technetium(IV) chloride''' is the ] composed of ] and ] with the ] TcCl<sub>4</sub> which has been investigated as a method of separating technetium from other volatile chlorides.<ref name="tech"> |
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'''Technetium(IV) chloride''' is the ] with the ] TcCl<sub>4</sub>. It was discovered in 1957 as the first binary halide of technetium. It is the highest oxidation binary chloride of technetium that has been isolated as a solid. It is volatile at elevated temperatures and its volatility has been used for separating technetium from other metal chlorides.<ref name="tech"> |
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{{Cite book |
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{{Cite book |
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| last = Schwochau |
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| last = Schwochau |
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| first = Klaus |
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| first = Klaus |
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| year = 2000 |
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| year = 2000 |
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| title = Technetium |
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| title = Technetium |
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| publisher = Wiley-VCH |
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| publisher = Wiley-VCH |
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| isbn = 3527294961 |
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| isbn = 978-3-527-29496-1 |
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| page = 67 |
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| page = 67 |
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| url = http://books.google.com/?id=BHjxH8q9iukC&pg=PA67&dq=%22Technetium+chloride%22 |
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| url = https://books.google.com/books?id=BHjxH8q9iukC&q=%22Technetium+chloride%22&pg=PA67 |
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}}</ref> ]al solutions of technetium(IV) chloride are ] to form Tc(VII) ions when exposed to ]s.<ref name="spec"> |
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}}</ref> |
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]al solutions of technetium(IV) chloride are ] to form Tc(VII) ions when exposed to ]s. |
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<ref name="spec"> |
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{{cite journal |
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{{cite journal |
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| last1 = Fattahi |
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| last1 = Fattahi |
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| first1 = M. |
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| first1 = M. |
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| last2 = Vichot |
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| last2 = Vichot |
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| first2 = L. |
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| first2 = L. |
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| last3 = Poineau |
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| last3 = Poineau |
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| first3 = F. |
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| first3 = F. |
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| last4 = Hou�e-Levin |
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| last4 = Houée-Levin |
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| first4 = C. |
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| first4 = C. |
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| last5 = Grambow |
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| last5 = Grambow |
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| first5 = B. |
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| first5 = B. |
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| title = Speciation of technetium(IV) chloride under gamma irradiation |
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| title = Speciation of technetium(IV) chloride under gamma irradiation |
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| journal = Radiochimica Acta |
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| journal = Radiochimica Acta |
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| volume = 93 |
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| volume = 93 |
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| pages = 409–413 |
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| issue = 7 |
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| pages = 409–413 |
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| year = 2005 |
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| year = 2005 |
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| doi = 10.1524/ract.2005.93.7.409 }} |
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| doi = 10.1524/ract.2005.93.7.409 | s2cid = 96640348 |
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}} |
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</ref> |
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</ref> |
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Technetium tetrachloride can be synthesized from the reaction of Cl<sub>2</sub> with technetium metal at elevated temperatures between 300 and 500 °C:<ref>{{Cite journal|last1=Johnstone|first1=Erik V.|last2=Poineau|first2=Frederic|last3=Forster|first3=Paul M.|last4=Ma|first4=Longzou|last5=Hartmann|first5=Thomas|last6=Cornelius|first6=Andrew|last7=Antonio|first7=Daniel|last8=Sattelberger|first8=Alfred P.|last9=Czerwinski|first9=Kenneth R.|date=2012-07-09|title=Technetium Tetrachloride Revisited: A Precursor to Lower-Valent Binary Technetium Chlorides|journal=Inorganic Chemistry|language=EN|volume=51|issue=15|pages=8462–8467|doi=10.1021/ic301011c|pmid=22775538|osti=1307429}}</ref> |
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==Technetium trichloride== |
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'''Technetium trichloride''' TcCl<sub>3</sub> was reported in 2010. It was prepared from ''ditechnetium(III) tetraacetate dichloride'' and ] at 300 °C as a black solid and consists of triangular Tc<sub>3</sub>Cl<sub>9</sub> units with |
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:Tc + 2 Cl<sub>2</sub> → TcCl<sub>4</sub> |
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C<sub>3V</sub> symmetry, with each Tc atom coordinated to two Tc neighbors and five chloride ligands (Tc-Tc ] 2.44 ]).<ref>{{cite journal|last1=Poineau|first1=Frederic|last2=Johnstone|first2=Erik V.|last3=Weck|first3=Philippe F.|last4=Kim|first4=Eunja|last5=Forster|first5=Paul M.|last6=Scott|first6=Brian L.|last7=Sattelberger|first7=Alfred P.|last8=Czerwinski|first8=Kenneth R.|title=Synthesis and Structure of Technetium Trichloride|journal=Journal of the American Chemical Society|volume=132|issue=45|pages=15864|year=2010|pmid=20977207|doi=10.1021/ja105730e}}</ref> |
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Technetium tetrachloride has also been prepared from the reaction of ] with ] in a sealed vessel at elevated temperature:<ref>{{cite book | last=Housecroft | first=Catherine E. | last2=Sharpe | first2=A. G. | title=Inorganic chemistry | publisher=Pearson Prentice Hall | publication-place=Upper Saddle River, N.J. | date=2005 | isbn=0-13-039913-2 | oclc=56834315|page=669}}</ref> |
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:Tc<sub>2</sub>O<sub>7</sub> + 7 CCl<sub>4</sub> → 2 TcCl<sub>4</sub> + 7 COCl<sub>2</sub> + 3 Cl<sub>2</sub> |
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At 450 °C under vacuum, TcCl<sub>4</sub> decomposes to ] and TcCl<sub>2</sub>.<ref>{{cite journal |doi=10.1021/ar400225b|title=Recent Advances in Technetium Halide Chemistry|year=2014|last1=Poineau|first1=Frederic|last2=Johnstone|first2=Erik V.|last3=Czerwinski|first3=Kenneth R.|last4=Sattelberger|first4=Alfred P.|journal=Accounts of Chemical Research|volume=47|issue=2|pages=624–632|pmid=24393028}}</ref> |
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As verified by ], the compound is an inorganic polymer consisting of interconnected TcCl<sub>6</sub> octahedra. |
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==References== |
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==References== |
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{{Technetium compounds}} |
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{{Chlorides}} |
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{{inorganic-compound-stub}} |
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