Definition, Betydelse & Anagram | Engelska ordet DIENE

Definition av DIENE

1. (kemi) dien

Exempel på hur man kan använda DIENE i en mening

• According to the Gold Book definition, a "diene" could include one or more heteroatoms which replace unsaturated carbon atoms, giving structures that could more specifically be called heterodienes.
• At room temperature, this cyclic diene dimerizes over the course of hours to give dicyclopentadiene via a Diels–Alder reaction.
• In organic chemistry, the Diels–Alder reaction is a chemical reaction between a conjugated diene and a substituted alkene, commonly termed the dienophile, to form a substituted cyclohexene derivative.
• Treating this compound with diethylamine in diethyl ether causes elimination of two equivalents of hydrogen bromide to give the diene product.
• The borabenzene-pyridine adduct behaves like a diene, not an analog of biphenyl, and will undergo Diels-Alder reactions.
• EPDM is made from ethylene, propylene, and a diene comonomer that enables crosslinking via sulfur vulcanization.
• When warmed with mineral acid, limonene isomerizes to the conjugated diene α-terpinene (which can also easily be converted to p-cymene).
• The dendralenes with an odd number of alkene units are more reactive due to the presence of favorable s-cis diene conformations and Diels-Alder reactions take place more easily with a preference for the termini.
• Boron served as a molecular tether and aligned both diene and dienophile for this endo Diels-Alder cycloaddition.
• A desaturase enzyme encoded by the gene Bmpgdesat1 (Desat1), produces the monoene (11Z)-hexadecenoyl-CoA as well as the diene (10E,12Z)-10,12-hexadecadienoyl-CoA.
• TCNQ is prepared by the condensation of 1,4-cyclohexanedione with malononitrile, followed by dehydrogenation of the resulting diene with bromine:.
• Another was his collaboration with Franz Sondheimer on natural products including an insecticide extracted from Zanthoxylum clava-herculis (a diene then called herculin, now systematically named as (2E,8E)-N-isobutyl-2,8-dodecadienamide); work which led to Raphael's award of the Meldola Medal in 1948.
• In another olefin application of Shell cyclododecatriene is partially hydrogenated to cyclododecene and then subjected to ethenolysis to the terminal linear open-chain diene.
• The diene has two features of interest: the substituents promote regiospecific addition to unsymmetrical dienophiles and the resulting adduct is amenable to further functional group manipulations after the addition reaction.
• The Whiting reaction is an organic reaction converting a propargyl diol into a diene using lithium aluminium hydride.
• Acyclic diene metathesis or ADMET (distinguish from ADME) is a special type of olefin metathesis used to polymerize terminal dienes to polyenes:.
• In this conversion, diethylamine adds across the diene substituent, the reaction being catalyzed by lithium diethylamide.
• With sulfolene no buildup of butadiene pressure could be expected as the liberated diene is consumed in the cycloaddition, and therefore the equilibrium of the reversible extrusion reaction acts as an internal "safety valve".
• Chrysanthemic acid is produced industrially in a cyclopropanation reaction of a diene as a mixture of cis- and trans isomers, followed by hydrolysis of the ester:.
• Modern Skydrol compatible seals are usually made from EPDM (ethylene propylene diene monomer) or PTFE (polytetrafluroethylene).

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