| 词条 | Tetrachloronickelate | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 释义 |
When concentrated lithium chloride and nickel chloride solution in water is mixed, only a pentaaquachloro complex is formed: [Ni(H2O)5Cl]+. However in other organic solvents, or molten salts the tetrachloronickelate ion can form. Nickel can be separated from such a solution in water or methanol, by partitioning it into a cyclohexane solution of amines.[2] Organic ammonium salts of the type (R3NH)2[NiCl4] are often thermochromic (R = Me, Et, Pr). Near room temperature, these salts are yellow , but these solids become blue when heated to near 70 °C. The bright blue color is characteristic of tetrahedral [NiCl4]2−, the intensity being a consequence of the Laporte selection rule. The yellow color results from a polymer consisting of octahedral Ni centers. The salt [(NC3H7)3NH]2NiCl4, is a blue ionic liquids at room temperature.[3] The corresponding tetrabromonickelates are also thermochromic with a lower transition temperatures.[3] HistoryThe blue colour due to the tetrachloronickelate ion was first observed in 1944 when Remy and Meyer melted cesium chloride and cesium nickel trichloride together.[5] Compounds
Related substances
References1. ^{{cite journal|author=Naida S. Gill |author2=F. B. Taylor |journal=Inorganic Syntheses |year=1967 |volume=9 |pages=136–142 |doi=10.1002/9780470132401.ch37 |title=Tetrahalo Complexes of Dipositive Metals in the First Transition Series |isbn=978-0-470-13240-1}} {{nickel compounds}}{{chlorine compounds}}2. ^{{cite journal|last1=Florence|first1=T. M.|last2=Farrar|first2=Yvonne J.|title=Liquid-liquid extraction of nickel with long-chain amines from aqueous and nonaqueous halide media|journal=Analytical Chemistry|date=July 1968|volume=40|issue=8|pages=1200–1206|doi=10.1021/ac60264a010}} 3. ^1 {{cite journal|last1=Ferraro|first1=John R.|last2=Sheren|first2=Anne T.|title=Some new thermochromic complexes of Nickel(II) of the type [R/sub x/NH/sub 4-x/]2NiCl4|journal=Inorganic Chemistry|volume=17|issue=9|pages=2498–2502|date=3 February 1978|doi=10.1021/ic50187a032}} 4. ^1 {{cite journal|last1=Cotton|first1=F. A.|last2=Faut|first2=O. D.|last3=Goodgame|first3=D. M. L.|title=Preparation, Spectra and Electronic Structures of Tetrahedral Nickel(II) Complexes Containing Triphenylphosphine and Halide Ions as Ligands|journal=Journal of the American Chemical Society|date=January 1961|volume=83|issue=2|pages=344–351|doi=10.1021/ja01463a021}} 5. ^{{cite journal|last1=Inman|first1=Guy W.|last2=Hatfield|first2=William E.|last3=Jones|first3=Edwin R.|title=The magnetic properties of tetraethylammonium tetrachloronickelate(II) and tetraethylammonium tetrabromonickelate(II)|journal=Inorganic and Nuclear Chemistry Letters|date=August 1971|volume=7|issue=8|pages=721–723|doi=10.1016/0020-1650(71)80078-8}} 6. ^1 2 3 {{cite journal|last1=Gill|first1=Naida S.|last2=Nyholm|first2=R. S.|title=802. Complex halides of the transition metals. Part I. Tetrahedral nickel complexes|journal=Journal of the Chemical Society (Resumed)|date=1959|pages=3997|doi=10.1039/JR9590003997}} 7. ^{{cite journal|last1=Goedken|first1=V. L.|last2=Vallarino|first2=L. M.|last3=Quagliano|first3=J. V.|title=Cationic ligands. Coordination of the 1,1,1-trimethylhydrazinium cation to nickel(II)|journal=Inorganic Chemistry|date=December 1971|volume=10|issue=12|pages=2682–2685|doi=10.1021/ic50106a011}} 8. ^{{cite journal|last1=Hitchcock|first1=Peter B.|last2=Seddon|first2=Kenneth R.|last3=Welton|first3=Thomas|title=Hydrogen-bond acceptor abilities of tetrachlorometalate(II) complexes in ionic liquids|journal=Journal of the Chemical Society, Dalton Transactions|date=1993|issue=17|pages=2639|doi=10.1039/DT9930002639}} 9. ^1 2 3 4 5 {{cite journal|last1=Meredith|first1=M. Brett|last2=McMillen|first2=C. Heather|last3=Goodman|first3=Jonathan T.|last4=Hanusa|first4=Timothy P.|title=Ambient temperature imidazolium-based ionic liquids with tetrachloronickelate(II) anions|journal=Polyhedron|date=August 2009|volume=28|issue=12|pages=2355–2358|doi=10.1016/j.poly.2009.04.037}} 10. ^{{cite journal|last1=Skaarup|first1=Steen|last2=Berg|first2=Rolf Willestofte|title=Structural properties and vibrational spectra of the ethylene-diammonium family of perovskite layer-type crystals: [NH3CH2CH2NH3] [MCl4], M = Ni, Pd, Cu, Cd, Mn|journal=Journal of Solid State Chemistry|date=September 1978|volume=26|issue=1|pages=59–67|doi=10.1016/0022-4596(78)90133-0}} 2 : Nickel complexes|Inorganic chlorine compounds |
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