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Platinum Tetrabromide
Platinum(IV) bromide is the inorganic compound with the formula PtBr4. It is a brown solid. It is a little-used compound mainly of interest for academic research. It is a component of a reagent used in qualitative inorganic analysis Classical qualitative inorganic analysis is a method of analytical chemistry which seeks to find the elemental composition of inorganic compounds. It is mainly focused on detecting ions in an aqueous solution, therefore materials in other forms m .... In terms of structure, the compound is an inorganic polymer consisting of interconnected PtBr6 octahedra. References Bromides,4 Bromides Platinum group halides {{inorganic-compound-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ethanol
Ethanol (also called ethyl alcohol, grain alcohol, drinking alcohol, or simply alcohol) is an organic compound with the chemical formula . It is an Alcohol (chemistry), alcohol, with its formula also written as , or EtOH, where Et is the pseudoelement symbol for ethyl group, ethyl. Ethanol is a Volatility (chemistry), volatile, flammable, colorless liquid with a characteristic wine-like odor and pungent taste. As a psychoactive depressant, it is the active ingredient in alcoholic beverages, and the second most consumed drug globally behind caffeine. Ethanol is naturally produced by the fermentation process of sugars by yeasts or via petrochemical processes such as ethylene hydration. Historically it was used as a general anesthetic, and has modern medical applications as an antiseptic, disinfectant, solvent for some medications, and antidote for methanol poisoning and ethylene glycol poisoning. It is used as a chemical solvent and in the Chemical synthesis, synthesis of orga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diethyl Ether
Diethyl ether, or simply ether, is an organic compound with the chemical formula , sometimes abbreviated as . It is a colourless, highly Volatility (chemistry), volatile, sweet-smelling ("ethereal odour"), extremely flammable liquid. It belongs to the ether class of organic compounds. It is a common solvent and was formerly used as a general anesthetic. Production Most diethyl ether is produced as a byproduct of the vapor-phase Hydration reaction, hydration of ethylene to make ethanol. This process uses solid-supported phosphoric acid Catalysis, catalysts and can be adjusted to make more ether if the need arises: Vapor-phase Dehydration reaction, dehydration of ethanol over some Aluminium oxide, alumina catalysts can give diethyl ether yields of up to 95%. : Diethyl ether can be prepared both in laboratories and on an industrial scale by the acid ether synthesis. Uses The dominant use of diethyl ether is as a solvent. One particular application is in the production of cell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Platinum(IV) Fluoride
Platinum tetrafluoride is the inorganic compound with the chemical formula . In the solid state, the compound features platinum(IV) in octahedral coordination geometry. Preparation The compound was first reported by Henri Moissan by the fluorination of platinum metal in the presence of hydrogen fluoride. A modern synthesis involves thermal decomposition of platinum hexafluoride. Properties Platinum tetrafluoride vapour at 298.15 K consists of individual molecules. The enthalpy of sublimation is 210 kJmol−1. Original analysis of powdered PtF4 suggested a tetrahedral molecular geometry, but later analysis by several methods identified it as octahedral, with four of the six fluorines on each platinum bridging to adjacent platinum centres. Reactions A solution of platinum tetrafluoride in water is coloured reddish brown, but it rapidly decomposes, releasing heat and forming an orange coloured platinum dioxide hydrate precipitate and fluoroplatinic acid. When heated to a red ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Platinum(IV) Chloride
Platinum(IV) chloride is the inorganic compound of platinum and chlorine with the empirical formula PtCl4. This brown solid features platinum in the +4 oxidation state. Structure Typical of Pt(IV), the metal centers adopt an octahedral coordination geometry, . This geometry is achieved by forming a polymer wherein half of the chloride ligands bridge between the platinum centers. Because of its polymeric structure, PtCl4 dissolves only upon breaking the chloride bridging ligands. Thus, addition of HCl give H2PtCl6. Lewis base adducts of Pt(IV) of the type cis-PtCl4L2 are known, but most are prepared by oxidation of the Pt(II) derivatives. Formation and reactions PtCl4 is mainly encountered in the handling of chloroplatinic acid, obtained by dissolving of Pt metal in aqua regia. Heating H2PtCl6 to 220 °C gives impure PtCl4: :H2PtCl6 → PtCl4 + 2 HCl A purer product can be produced by heating under chlorine gas at 250 °C. If excess acids are removed, PtCl4 crystallizes from a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Platinum(IV) Iodide
Platinum(IV) iodide is a inorganic compound with the formula . it is a dark brown diamagnetic solid and is one of several binary iodides of platinum. Preparation Platinum(IV) iodide can be prepared from the effect of iodine on platinum: : Iodide accelerates this process. It can also be obtained from the decomposition of hydrogen hexaiodoplatinate(IV) at 80 °C: : Physical properties Platinum(IV) iodide forms dark brown crystals of several modifications: * ''α''-, rhombic crystal system, spatial group ''P bca'', cell parameters a = 1.290 nm, b = 1.564 nm, c = 0.690 nm, Z = 8; * ''β''-, cubic crystal system, spatial group ''P m3m'', cell parameters a = 0.56 nm, Z = 1; * ''γ''-, tetragonal crystal system, spatial group ''I 41/a'', cell parameters a = 0.677 nm, c = 3.110 nm, Z = 8. Platinum(IV) iodide decomposes in water. It is also soluble in ethanol, acetone, alkali, HI, KI, liquid . Chemical properties It decomposes when heated: : When dissolved in hydroiodic acid H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nickel(II) Bromide
Nickel(II) bromide is the name for the inorganic compounds with the chemical formula NiBr2(H2O)''x''. The value of ''x'' can be 0 for the anhydrous material, as well as 2, 3, or 6 for the three known hydrate forms. The anhydrous material is a yellow-brown solid which dissolves in water to give blue-green hexahydrate (see picture). Structure The structure of the nickel bromides varies with the degree of hydration. In all of these cases, the nickel(II) ion adopts an octahedral molecular geometry. Similar structures are observed in aqueous solutions of nickel bromide. *Anhydrous NiBr2 adopts the hexagonal cadmium chloride structure. The interatomic distance for Ni-Br is 2.52—2.58 Å. Anhydrous NiBr2 is a paramagnet at room temperature. Upon cooling, it turns into an antiferromagnet at 52 K, and then into a helimagnet at 22.8 K. *The structure of the trihydrate has not been confirmed by X-ray crystallography X-ray crystallography is the experimental science of determining the a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
