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1,1'-diaminoferrocene
1,1'-Diaminoferrocene is the organoiron compound with the formula . It is the simplest diamine derivative of ferrocene. It is a yellow, air-sensitive solid that is soluble in aqueous acid. The 1,1' part of its name refers to the location of the amine groups on separate rings. Compared to the parent ferrocene, the diamine is about 600 mV more reducing. It can be prepared from the diisocyanate , which in turn is derived from 1,1'-ferrocenedicarboxylic acid. 1,1'-Diaminoferrocene was originally prepared by hydrogenation of 1,1'-diazidoferrocene ( ). 1,1'-Diaminoferrocene has been incorporated into various diamide and diimine ligands, which form catalyst Catalysis () is the process of increasing the rate of a chemical reaction by adding a substance known as a catalyst (). Catalysts are not consumed in the reaction and remain unchanged after it. If the reaction is rapid and the catalyst recyc ...s that exhibit redox switching. References {{DEFAULTSORT:Diaminoferrocen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1,1'-Ferrocenedicarboxylic Acid
1,1'-Ferrocenedicarboxylic acid is the organoiron compound with the formula . It is the simplest dicarboxylic acid derivative of ferrocene. It is a yellow solid that is soluble in aqueous base. The 1,1' part of its name refers to the location of the carboxylic acid groups on separate rings. It can be prepared by hydrolysis of its diesters (R = Me, Et), which in turn are obtained by treatment of ferrous chloride with the sodium salt of the carboxyester of cyclopentadienide . Ferrocenedicarboxylic acid is the precursor to many derivatives such as the diacid chloride, the diisocyanate, the diamide, and diamine, respectively, , , , and . Derivatives of ferrocenedicarboxylic acid are components of some redox switches and redox active coatings. Related compounds * Ferrocenecarboxylic acid Ferrocenecarboxylic acid is the organoiron compound with the formula . It is the simplest carboxylic acid derivative of ferrocene. It can be prepared in two steps from ferrocene by ac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Redox Switch
In chemistry, a redox switch is a molecular device, which has two subunits, a functional component and a control component. The "control subunit" is redox-active, meaning that it can exist in either of two redox states. The "functional" component could have a variety of readouts, such as fluorescence, the binding of a substrate, or catalytic activity. The key feature of such redox switches is that the functional component is influenced by the control subunit. One of many examples of a redox switch consists of an anthracene substituent to a copper-thiacrown ether (14-ane-4) coordination complex. When in the cupric oxidation state, the anthracene does not fluoresce. When in the cuprous state, the assembly is highly fluorescent. Several redox switches have been produced from ferrocenecarboxylic acid, which can be conjugated to a number of functional components. 1,1'-Diaminoferrocene has been incorporated into various diamide and diimine ligands, which form catalyst Catalys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Organoiron Compound
Organoiron chemistry is the chemistry of iron compounds containing a carbon-to-iron chemical bond. Organoiron compounds are relevant in organic synthesis as reagents such as iron pentacarbonyl, diiron nonacarbonyl and disodium tetracarbonylferrate. While iron adopts oxidation states from Fe(−II) through to Fe(VII), Fe(IV) is the highest established oxidation state for organoiron species. Although iron is generally less active in many catalytic applications, it is less expensive and " greener" than other metals. Organoiron compounds feature a wide range of ligands that support the Fe-C bond; as with other organometals, these supporting ligands prominently include phosphines, carbon monoxide, and cyclopentadienyl, but hard ligands such as amines are employed as well. Iron(0) and more reduced states Carbonyl complexes Important iron carbonyls are the three neutral binary carbonyls, iron pentacarbonyl, diiron nonacarbonyl, and triiron dodecacarbonyl. One or more carbonyl ligands ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diamine
A diamine is an amine with exactly two amino groups. Diamines are used as monomers to prepare polyamides, polyimides, and polyureas. The term ''diamine'' refers mostly to primary diamines, as those are the most reactive. In terms of quantities produced, 1,6-diaminohexane (a precursor to Nylon 6-6) is most important, followed by ethylenediamine. Vicinal diamines (1,2-diamines) are a structural motif in many biological compounds and are used as ligands in coordination chemistry. Aliphatic diamines Linear * 1 carbon: methylenediamine (diaminomethane) of theoretical interest only * 2 carbons: ethylenediamine (1,2-diaminoethane). Related derivatives include the N-alkylated compounds, 1,1-dimethylethylenediamine, 1,2-dimethylethylenediamine, ethambutol, tetrakis(dimethylamino)ethylene, TMEDA. File:Ethylene_diamine.png, Ethylenediamine * 3 carbons: 1,3-diaminopropane (propane-1,3-diamine) * 4 carbons: putrescine (butane-1,4-diamine) * 5 carbons: cadaverine (pentane-1,5-di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ferrocene
Ferrocene is an organometallic compound with the formula . The molecule is a complex consisting of two cyclopentadienyl rings bound to a central iron atom. It is an orange solid with a camphor-like odor, that sublimes above room temperature, and is soluble in most organic solvents. It is remarkable for its stability: it is unaffected by air, water, strong bases, and can be heated to 400 °C without decomposition. In oxidizing conditions it can reversibly react with strong acids to form the ferrocenium cation . The rapid growth of organometallic chemistry is often attributed to the excitement arising from the discovery of ferrocene and its many analogues, such as metallocenes. History Discovery Ferrocene was discovered by accident thrice. The first known synthesis may have been made in the late 1940s by unknown researchers at Union Carbide, who tried to pass hot cyclopentadiene vapor through an iron pipe. The vapor reacted with the pipe wall, creating a "yellow slu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Redox Couple
Redox (reduction–oxidation, , ) is a type of chemical reaction in which the oxidation states of substrate change. Oxidation is the loss of electrons or an increase in the oxidation state, while reduction is the gain of electrons or a decrease in the oxidation state. There are two classes of redox reactions: * ''Electron-transfer'' – Only one (usually) electron flows from the reducing agent to the oxidant. This type of redox reaction is often discussed in terms of redox couples and electrode potentials. * ''Atom transfer'' – An atom transfers from one substrate to another. For example, in the rusting of iron, the oxidation state of iron atoms increases as the iron converts to an oxide, and simultaneously the oxidation state of oxygen decreases as it accepts electrons released by the iron. Although oxidation reactions are commonly associated with the formation of oxides, other chemical species can serve the same function. In hydrogenation, C=C (and other) bonds are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1,1'-Ferrocenediisocyanate
1,1'-Ferrocenediisocyanate (1,1'-diisocyanatoferrocene) is the organoiron compound with the formula . It is the simplest di isocyanate derivative of ferrocene. It can be synthesized by the Curtius rearrangement of the diacyl azide, using several protocols starting from 1,1'-ferrocenedicarboxylic acid. The compound is useful as an intermediate in the synthesis of 1,1'-diaminoferrocene by hydrolysis of the isocyanates. Various poly( siloxane–urethane) crosslinked polymers can be formed by reaction with siloxane-diols. These compounds are of interest as electrochemically active polymers that might have good mechanical properties A materials property is an intensive property of a material, i.e., a physical property that does not depend on the amount of the material. These quantitative properties may be used as a metric by which the benefits of one material versus another ca ... at low temperature. References Ferrocenes Cyclopentadienyl complexes Isocyanates {{organi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrogenation
Hydrogenation is a chemical reaction between molecular hydrogen (H2) and another compound or element, usually in the presence of a catalyst such as nickel, palladium or platinum. The process is commonly employed to reduce or saturate organic compounds. Hydrogenation typically constitutes the addition of pairs of hydrogen atoms to a molecule, often an alkene. Catalysts are required for the reaction to be usable; non-catalytic hydrogenation takes place only at very high temperatures. Hydrogenation reduces double and triple bonds in hydrocarbons. Process Hydrogenation has three components, the unsaturated substrate, the hydrogen (or hydrogen source) and, invariably, a catalyst. The reduction reaction is carried out at different temperatures and pressures depending upon the substrate and the activity of the catalyst. Related or competing reactions The same catalysts and conditions that are used for hydrogenation reactions can also lead to isomerization of the alkenes f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diimine
Diimines are organic compounds containing two imine (RCH=NR') groups. Common derivatives are 1,2- diketones and 1,3-diimines. These compounds are used as ligands and as precursors to heterocycles. Diimines are prepared by condensation reactions where a dialdehyde or diketone is treated with amine and water is eliminated. Similar methods are used to prepare Schiff bases and oximes. 1,2-Diimines The 1,2-diketimine ligands also called α-diimines and 1,4-diazabutadienes. They are derived from the condensation of 1,2-diketones and glyoxal with amines, often anilines. An example is glyoxal-bis(mesitylimine), a yellow solid that is synthesized by condensation of 2,4,6-trimethylaniline and glyoxal. 2,2'-Bipyridine is a 1,2-diimine. 1,2-Diketimines are “ non-innocent ligands”, akin to the dithiolenes. : 1,3-Diimines For example, acetylacetone (2,4-pentanedione) and a primary alkyl- or arylamine will react, typically in acidified ethanol, to form a diketimine. 1,3-Di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catalyst
Catalysis () is the process of increasing the rate of a chemical reaction by adding a substance known as a catalyst (). Catalysts are not consumed in the reaction and remain unchanged after it. If the reaction is rapid and the catalyst recycles quickly, very small amounts of catalyst often suffice; mixing, surface area, and temperature are important factors in reaction rate. Catalysts generally react with one or more reactants to form intermediates that subsequently give the final reaction product, in the process of regenerating the catalyst. Catalysis may be classified as either homogeneous, whose components are dispersed in the same phase (usually gaseous or liquid) as the reactant, or heterogeneous, whose components are not in the same phase. Enzymes and other biocatalysts are often considered as a third category. Catalysis is ubiquitous in chemical industry of all kinds. Estimates are that 90% of all commercially produced chemical products involve catalysts at some sta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyclopentadienyl Complexes
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Cyclopentadienyl can refer to * Cyclopentadienyl anion, or cyclopentadienide, **Cyclopentadienyl ligand * Cyclopentadienyl radical, • * Cyclopentadienyl cation, See also *Pentadienyl In organic chemistry, pentadienyl refers to the organic radical, anion, or cation with the formula , where ''z'' = 0, −1, +1, respectively. Organometallic chemistry In organometallic chemistry, the pentadienyl anion is a ligand, the acyclic a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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