| 词条 | Dimethylphosphine |
| 释义 |
| ImageFile = Me2PH.png | ImageSize = 124 px | ImageAlt = | IUPACName = | OtherNames = dimethylphosphane |Section1={{Chembox Identifiers | CASNo = 676-59-5 | PubChem = 69607 | ChemSpiderID = 62810 | SMILES = CPC | StdInChI = 1S/C2H7P/c1-3-2/h3H,1-2H3 | StdInChIKey = YOTZYFSGUCFUKA-UHFFFAOYSA-N}} |Section2={{Chembox Properties | Formula = C2H7P | MolarMass = 62.05 | Appearance = colorless gas | Density = | MeltingPt = | BoilingPt = 21.1 °C | Solubility = }} |Section3={{Chembox Hazards | MainHazards = toxic | FlashPt = | AutoignitionPt = }} }}Dimethylphosphine is the organophosphorus compound with the formula (CH3)2PH, often written Me2PH. It is a malodorous gas that condenses to a colorless liquid just below room temperature. Although it can be produced by methylation of phosphine, a more practical synthesis involves the reduction of tetramethyldiphosphine disulfide with tributylphosphine:[1] [Me2P(S)]2 + PBu3 + H2O → Me2PH + SPBu3 + Me2P(O)H ReactionsThe compound exhibits the properties characteristic of a secondary phosphine, i.e., a compound of the type R2PH. It can be oxidized to the phosphinic acid: Me2PH + O2 → Me2PO2H It protonates to give the phosphonium ion: Me2PH + H+ → Me2PH2+ With strong bases, it can be deprotonated to give dimethylphosphide derivatives: Me2PH + LiNH2 → Me2PLi + NH3 References1. ^A. Trenkle, H. Vahrenkamp “Dimethylphosphine” Inorganic Syntheses 1982, volume 21, p. 180. {{DOI|10.1002/9780470132524.ch40}} 1 : Phosphines |
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