diazonium salt वाक्य
उदाहरण वाक्य
मोबाइल
- The reactants are an aryl diazonium salt obtained from reaction of the corresponding aniline with sodium nitrite and hydrochloric acid and the hydrazone of pyruvic acid.
- This series of steps is mechanistically identical to the first half of the mechanism formation of the more well-known aryl and alkyl diazonium salts.
- Water-soluble diazonium salts react with carbon nanotubes via charge transfer in which they extract electrons from SWNT and form a stable covalent aryl bond.
- As a primary amine, the dye can be diazotized in the laboratory, and the resulting diazonium salt used as a trapping agent in enzyme histochemistry.
- The reaction of the surface with a solution of diazonium salt in acetonitrile for 2 hours in the dark is a spontaneous process through a free radical mechanism:
- So far grafting of diazonium salts on metals has been accomplished on iron, cobalt, nickel, platinum, palladium, zinc, copper and gold surfaces.
- The next intermediate is the stable nitrosamine with goes on to lose water forming the diazonium salt which then reacts with the vinyl group in the ring-closing step.
- In the Leuckart thiophenol reaction the starting material is an aniline through the diazonium salt ( ArN 2 X ) and the xanthate ( ArS ( C = S ) OR)
- The reactive strips detect nitrite by using the aromatic amine ( para-arsanilic acid or sulphanilamide ) in order to form a diazonium salt that in turn reacts with tetrahydrobenzoquinoline to produce a pink azo dye.
- The reaction offers a wide scope for both diazonium component and arene component but yields are generally low following the original procedure ( less than 40 % ), given the many side-reactions of diazonium salts.
- Under these conditions, the azodyes ( couplers ) react with the remaining diazonium salt and undergo a chemical reaction that results in the unexposed lines changing color from invisible ( or yellow ) to a visible dark color.
- Phenylhydrazine is prepared by oxidizing aniline with sodium nitrite in the presence of hydrogen chloride to form the diazonium salt, which is subsequently reduced using sodium sulfite in the presence of sodium hydroxide to form the final product.
- In a novel kilogram-scale metal-free Meerwein arylation the diazonium salt is formed from 2-nitroaniline, the alkene isopropenyl acetate is an adduct of propene and acetic acid and the reaction product 2-nitrophenylacetone:
- An aromatic ( or heterocyclic ) amine quickly reacts with a nitrite to form an aryl diazonium salt, which decomposes in the presence of copper ( I ) salts, such as CuCl, to form the desired aryl halide.
- The bilirubin combines with a diazonium salt ( 2, 4-dichloroaniline or 2, 6-dichlorobenzene-diazonium-tetrafluoroborate ) in an acid medium to produce an azo dye with colouration that varies from pink to violet:
- An electron-withdrawing group ( EWG ) on the alkene makes it electron deficient and although the reaction mechanism is unclear, involvement of an aryl radical is presumed after loss of nitrogen in the diazonium salt followed by a free radical addition.
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