| 词条 | Tetrakis(triphenylphosphine)platinum(0) |
| 释义 |
| verifiedrevid = 408887620 | Name = Tetrakis(triphenylphosphine)platinum(0) | ImageFile = Tetrakis(triphenylphosphine)platinum(0)-3D-sticks.png | ImageSize = 180px | ImageName = 3D model of the tetrakis(triphenylphosphine)platinum(0) molecule | IUPACName = Tetrakis(triphenylphosphane)platinum(0) | OtherNames = Tetrakis(triphenylphosphane)platinum(0) TPP platinum(0) |Section1={{Chembox Identifiers | CASNo_Ref = {{cascite|correct|??}} | CASNo = 14221-02-4 | PubChem = 11979705 | RTECS = Unregistered | SMILES = c0ccccc0[P+](c0ccccc0)(c0ccccc0)[Pt-4]([P+](c0ccccc0)(c0ccccc0)c0ccccc0)([P+](c0ccccc0)(c0ccccc0)c0ccccc0)[P+](c0ccccc0)(c0ccccc0)c0ccccc0 |Section2={{Chembox Properties | Formula = {{carbon}}72{{hydrogen}}60{{phosphorus}}4{{platinum}} | MolarMass = 1244.24 g/mol | Appearance = yellow crystals | Density = | Solubility = Insoluble | MeltingPtC = 160 |Section3={{Chembox Structure | MolShape = tetrahedral | Coordination = four triphenylphosphine unidentate ligands attached to a central Pt(0) atom in a tetrahedral geometry | CrystalStruct = | Dipole = 0 D |Section7={{Chembox Hazards | ExternalSDS = External MSDS | MainHazards = PPh3 is an irritant | NFPA-H = 2 | NFPA-F = 1 | NFPA-R = | RPhrases = n/a | SPhrases = {{S24/25}} |Section8={{Chembox Related | OtherFunction_label = complexes | OtherFunction = Tetrakis(triphenylphosphine)palladium(0) tetrakis(triphenylphosphine)nickel(0) tris(triphenylphosphine)platinum(0) | OtherCompounds = triphenylphosphine }}Tetrakis(triphenylphosphine)platinum(0) is the chemical compound with the formula Pt(P(C6H5)3)4, often abbreviated Pt(PPh3)4. The bright yellow compound is used as a precursor to other platinum complexes.[1][2] Structure and behaviorThe molecule is tetrahedral, with point group symmetry of Td, as expected for a four-coordinate metal complex of a metal with the d10 configuration.[3] Even though this complex follows the 18 electron rule, it dissociates triphenylphosphine in solution to give the 16e− derivative containing only three PPh3 ligands: Pt(PPh3)4 → Pt(PPh3)3 + PPh3 Synthesis and reactionsThe complex is typically prepared in one-pot reaction from potassium tetrachloroplatinate(II). Reduction of this platinum(II) species with alkaline ethanol in the presence of excess triphenylphosphine affords the product as a precipitate. The reaction occurs in two distinct steps. In the first step, PtCl2(PPh3)2 is generated. In the second step, this platinum(II) complex is reduced. The overall synthesis can be summarized as: K2[PtCl4] + 2KOH + 4PPh3 + C2H5OH → Pt(PPh3)4 + 4KCl + CH3CHO + 2H2O Pt(PPh3)4 reacts with oxidants to give platinum(II) derivatives: Pt(PPh3)4 + Cl2 → cis-PtCl2(PPh3)2 + 2 PPh3 Mineral acids give the corresponding hydride complexes: Pt(PPh3)4 + HCl → trans-PtCl(H)(PPh3)2 + 2 PPh3 The reaction with oxygen affords a dioxygen complex: Pt(PPh3)4 + O2 → Pt(η2-O2)(PPh3)2 + 2 PPh3 This complex is a precursor to the ethylene complex Pt(η2-O2)(PPh3)2 + C2H4 → Pt(η2-C2H4)(PPh3)2 + "NaBH2(OH)2" References1. ^{{cite journal | journal = Inorganic Syntheses | volume = 28 |author1=Ugo, R. |author2=Cariati, F. |author3=La Monica, G. | title = Tris- and tetrakis(triphenylphosphine)platinum(0)| pages = 123–126 | doi = 10.1002/9780470132593.ch33 | year = 1990}} {{Platinum compounds}}2. ^Safety Data Sheet http://www.alfa.com/content/msds/english/10549.pdf 3. ^Miessler, Gary L., and Donald A. Tarr. Inorganic Chemistry. 3rd ed. Upper Saddle River, NJ: Pearson Prentice Hall, 2004. 5 : Platinum compounds|Catalysts|Homogeneous catalysis|Triphenylphosphine complexes|Coordination compounds |
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