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{{Chembox |
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{{Unreferenced|date=November 2010}} |
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{{chembox |
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| verifiedrevid = 417635681 |
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| verifiedrevid = 446133873 |
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| Name = Gold(I,III) chloride |
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| ImageFile1 = Au4Cl8-from-xtal-1982-2D-with-oxidation-states.png |
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| ImageFile1 = Au4Cl8-from-xtal-1982-2D-with-oxidation-states.png |
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| ImageFile1_Ref = {{chemboximage|correct|??}} |
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| ImageFile2 = Au4Cl8-from-xtal-1982-CM-3D-ellipsoids.png |
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| ImageName1 = Skeletal formula of gold(I,III) chloride with implicit oxidation states shown |
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| IUPACName = |
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| ImageFile2 = Au4Cl8-from-xtal-3D-bs-17.png |
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| OtherNames = Gold chloride; mixed gold chloride; tetragold octachloride |
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| OtherNames = Mixed gold chloride, Tetragold octachloride |
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| Section1 = {{Chembox Identifiers |
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| SystematicName = tetra-μ-chlorotetrachlorotetragold |
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| SMILES = |
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|Section1={{Chembox Identifiers |
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| CASNo = 62792-24-9 |
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| CASNo_Ref = {{cascite|correct|??}} |
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| RTECS = |
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| CASNo = 62792-24-9 |
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}} |
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| PubChem = 139092506 |
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| Section2 = {{Chembox Properties |
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| SMILES = Cl1(Cl)(Cl)(Cl)1 |
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| Formula = Au<sub>4</sub>Cl<sub>8</sub> |
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| SMILES1 = ........... |
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| MolarMass = 1071.488 g/mol |
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| StdInChI_Ref = {{stdinchicite|changed|chemspider}} |
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| Appearance = black solid |
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| StdInChI = 1S/4Au.4ClH.4Cl/h;;;;4*1H;;;;/q;;2*+2;;;;;;;;/p-4 |
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| Density = |
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| StdInChIKey_Ref = {{stdinchicite|changed|chemspider}} |
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| Solubility = |
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| StdInChIKey = NWBJVUUFMJPGPV-UHFFFAOYSA-J |
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| BoilingPt = |
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|Section2={{Chembox Properties |
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| pKa = |
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| Formula = {{Chem|Au|4|Cl|8}} |
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| pKb = |
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| MolarMass = 1071.490 g mol<sup>−1</sup> |
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| Viscosity = |
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| Appearance = black crystals |
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| Section3 = {{Chembox Structure |
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| Coordination = |
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| Dipole = |
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| Section7 = {{Chembox Hazards |
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| ExternalMSDS = |
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'''Gold(I,III) chloride''' is a black solid with chemical formula ]<sub>4</sub>]<sub>8</sub> that contains gold in two different ] - +1 and +3. It is a ] solid and should be kept away from light and stored in dark-coloured containers. |
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'''Gold(I,III) chloride''' is the ] with the chemical formula ]<sub>4</sub>]<sub>8</sub>. It is an example of a ] as it contains gold in two ]; square-planar gold(III) and almost linear gold(I). The compound, which is black, is ] as well as air- and moisture-sensitive. |
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==References== |
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<references/> |
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==Synthesis== |
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According to the procedure by ] et al., gold(I,III) chloride may be prepared by the reaction of ] with gold carbonyl chloride<ref name=XRD>{{cite journal|last1=Dell'Amico|first1=Daniela Belli|last2=Calderazzo|first2=Fausto|last3=Marchetti|first3=Fabio|last4=Merlino|first4=Stefano|last5=Perego|first5=Giovanni|title=X-Ray crystal and molecular structure of Au<sub>4</sub>Cl<sub>8</sub>, the product of the reduction of Au<sub>2</sub>Cl<sub>6</sub> by Au(CO)Cl|journal=Journal of the Chemical Society, Chemical Communications|date=1977|issue=1|pages=31|doi=10.1039/C39770000031}}</ref> or ]<ref name=optimised>{{cite journal|last1=Dell'Amico|first1=Daniela Belli|last2=Calderazzo|first2=Fausto|last3=Marchetti|first3=Fabio|last4=Merlino|first4=Stefano|title=Synthesis and molecular structure of , and the isolation of <sup>−</sup> in thionyl chloride|journal=Journal of the Chemical Society, Dalton Transactions|date=1982|issue=11|pages=2257|doi=10.1039/DT9820002257}}</ref> at room temperature in ]. |
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:Au<sub>2</sub>(CO)Cl<sub>4</sub> + Au<sub>2</sub>Cl<sub>6</sub> → COCl<sub>2</sub> + Au<sub>4</sub>Cl<sub>8</sub> |
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:2 Au<sub>2</sub>Cl<sub>6</sub> + 2 CO → Au<sub>4</sub>Cl<sub>8</sub> + 2 COCl<sub>2</sub> |
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==Structure and properties== |
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Single crystals of gold(I,III) chloride are triclinic with a ''P''{{overline|1}} ] and consist of discrete Au<sub>4</sub>Cl<sub>8</sub> molecules with idealised C<sub>2h</sub> ].<ref name=XRD /> Within this the Au(I) centers are linearly coordinated with a Cl-Au-Cl bond angle of 175.0° (close to the ideal value of 180°) and an average bond length of 2.30 ]. The Au(III) centers adopt a slightly irregular square-planar conformation with the Au-Cl bond lengths for ] chlorides (2.33 Å) being slightly longer than those of terminal chlorides (2.24 Å). |
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== References == |
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{{Reflist}} |
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{{inorganic-compound-stub}} |
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{{Gold compounds}} |
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{{Gold compounds}} |
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{{DEFAULTSORT:Gold(I,Iii) Chloride}} |
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