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Endo-tetrahydrodicyclopentadiene
Tricyclodecane (TCD) is an organic compound with the formula C10H16. It is classed as a hydrocarbon. It has two main stereoisomers–the ''endo'' and ''exo'' forms. Its primary use in the exo form is as a component of jet fuel. It is used here primarily because of its high energy density. The exo isomer also has a low freezing point. Because of this, its properties have been studied extensively. It is often called tetrahydrodicyclopentadiene. Reactions Its reactions with other materials have been studied, as have various production methods. The two isomers can interconvert in the presence of aluminum chloride Aluminium chloride, also known as aluminium trichloride, is an inorganic compound with the formula . It forms a hexahydrate with the formula , containing six water molecules of hydration. Both the anhydrous form and the hexahydrate are col ... as catalyst absorbed on substrates such as silicon dioxide or zeolites, with preference for forming the ''exo'' as the major ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jet Fuel
Jet fuel or aviation turbine fuel (ATF, also abbreviated avtur) is a type of aviation fuel designed for use in aircraft powered by Gas turbine, gas-turbine engines. It is colorless to straw-colored in appearance. The most commonly used fuels for commercial aviation are Jet A and Jet A-1, which are produced to a standardized international specification. The only other jet fuel commonly used in civilian turbine-engine powered aviation is Jet B, which is used for its enhanced cold-weather performance. Jet fuel is a mixture of a variety of hydrocarbons. Because the exact composition of jet fuel varies widely based on petroleum source, it is impossible to define jet fuel as a ratio of specific hydrocarbons. Jet fuel is therefore defined as a performance specification rather than a chemical compound. Furthermore, the range of molecular mass between hydrocarbons (or different carbon numbers) is defined by the requirements for the product, such as the freezing point or smoke point. Keros ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Twistane
Twistane (IUPAC name: tricyclo .4.0.03,8ecane) is an organic compound with the formula C10 H16. It is a cycloalkane and an isomer of the simplest diamondoid, adamantane, and like adamantane, is not very volatile. Twistane was named for the way its rings are permanently forced into the cyclohexane conformation known as the "twist-boat". The compound was first reported by Whitlock in 1962. Synthesis Twistane has been synthesized in a variety of ways. The original 1962 method was based on a bicyclo .2.2ctane framework. A 1967 publication concerned an intramolecular aldol condensation of a ''cis''-decalin diketone. It is formed when basketane is hydrogenated. Symmetry The only symmetry operation in twistane is ''rotation'', and there exist three 2-fold axes as shown in the left picture. Thus the point group of twistane is D2. Although twistane has four stereocenters, it only exists as two enantiomers. This is because it is symmetric along its C2 axis. Polytwistane Polytwistane i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stereoisomer
In stereochemistry, stereoisomerism, or spatial isomerism, is a form of isomerism in which molecules have the same molecular formula and sequence of bonded atoms (constitution), but differ in the three-dimensional orientations of their atoms in space. This contrasts with structural isomers, which share the same molecular formula, but the bond connections or their order differs. By definition, molecules that are stereoisomers of each other represent the same structural isomer. Enantiomers Enantiomers, also known as optical isomers, are two stereoisomers that are related to each other by a reflection: they are mirror images of each other that are non-superposable. Human hands are a macroscopic analog of this. Every stereogenic center in one has the opposite configuration in the other. Two compounds that are enantiomers of each other have the same physical properties, except for the direction in which they rotate polarized light and how they interact with different enantiomers of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dicyclopentadiene
Dicyclopentadiene, abbreviated DCPD, is a chemical compound with formula . At room temperature, it is a white brittle wax, although lower purity samples can be straw coloured liquids. The pure material smells somewhat of soy wax or camphor, with less pure samples possessing a stronger acrid odor. Its energy density is 10,975 Wh/l. Dicyclopentadiene is a co-produced in large quantities in the steam cracking of naphtha and gas oils to ethylene. The major use is in resins, particularly, unsaturated polyester resins. It is also used in inks, adhesives, and paints. The top seven suppliers worldwide together had an annual capacity in 2001 of 179 kilotonnes (395 million pounds). DCPD was discovered in 1885 as a hydrocarbon among the products of pyrolysis of phenol by Henry Roscoe, who didn't identify the structure (that was made during the following decade) but accurately assumed that it was a dimer of some hydrocarbon. History and structure For many years the structure of dicy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aluminum Chloride
Aluminium chloride, also known as aluminium trichloride, is an inorganic compound with the formula . It forms a hexahydrate with the formula , containing six water molecules of hydration. Both the anhydrous form and the hexahydrate are colourless crystals, but samples are often contaminated with iron(III) chloride, giving them a yellow colour. The anhydrous form is commercially important. It has a low melting and boiling point. It is mainly produced and consumed in the production of aluminium, but large amounts are also used in other areas of the chemical industry. The compound is often cited as a Lewis acid. It is an inorganic compound that reversibly changes from a polymer to a monomer at mild temperature. Structure Anhydrous adopts three structures, depending on the temperature and the state (solid, liquid, gas). Solid has a sheet-like layered structure with cubic close-packed chloride ions. In this framework, the Al centres exhibit octahedral coordination geomet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aviation Fuels
Aviation fuels are either petroleum-based or blends of petroleum and synthetic fuels, used to power aircraft. They have more stringent requirements than fuels used for ground applications, such as heating and road transport, and they contain additives to enhance or preserve properties important to fuel performance and handling. They are kerosene-based fuels (such as JP-8 and Jet A-1) used in gas-turbine-powered aircraft. Piston-engined aircraft use leaded gasoline, while those with diesel engines may use jet fuel (kerosene). By 2012, all U.S. Air Force aircraft had been certified to use a 50-50 blend of kerosene and synthetic fuel derived from coal or natural gas, in an effort to stabilize fuel costs. Types of aviation fuel Conventional aviation fuels Jet fuel Jet fuel is a clear to straw-colored fuel, based on either an unleaded kerosene (Jet A-1), or a naphtha–kerosene blend (Jet B). Similar to diesel fuel, it can be used in either Diesel engine, compression ignition ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
