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4-Chloro-1,3-dinitrobenzene. ... It is a yellow solid that is soluble in organic solvents. It is an intermediate for the industrial production of other compounds. [2]
The three possible arrangements of the nitro groups afford three isomers, 1,2-dinitrobenzene, 1,3-dinitrobenzene, and 1,4-dinitrobenzene. Each isomer has the chemical formula C 6 H 4 N 2 O 4 and a molar mass of about 168.11 g/mol. 1,3-Dinitrobenzene is the most common isomer and it is used in the manufacture of explosives.
1,1-Dimethylhydrazine is produced by the reduction of N-nitrosodimethylamine. [2] The reduction of benzenediazonium chloride with tin(II) chloride and hydrochloric acid provides phenylhydrazine. [2] 2,4-Dinitrophenylhydrazine is produced by the reaction of 1-chloro-2,4-dinitrobenzene with hydrazine. [2]
2,4-Dinitroanisole can be formed from p-nitroanisole or o-nitroanisole nitration. Also it can be formed from 1-chloro-2,4-dinitrobenzene by treatment with sodium methoxide (sodium in methanol) or sodium hydroxide with methanol. [1] Over a period of days, alkalies will hydrolyse the ether bond to form 2,4-dinitrophenol. [7]
2,4-Dinitroaniline can be prepared by reaction of 1-chloro-2,4-dinitrobenzene with ammonia. It can be also prepared by the electrophilic aromatic substitution of aniline. Direct nitration should not be used due to the reactivity of aniline. (i.e. It can be protonated to anilinium or oxidized easily.) Instead the acetyl protection should be used.
2,4-Dinitroaniline can be prepared by reaction of 1-chloro-2,4-dinitrobenzene with ammonia or by acid hydrolysis of 2,4-dinitroacetanilide. [ 1 ] Dinitroanilines are explosive and flammable with heat or friction.
Frederick Sanger. In 1945, Frederick Sanger described its use for determining the N-terminal amino acid in polypeptide chains, in particular insulin. [4] Sanger's initial results suggested that insulin was a smaller molecule than previously estimated (molecular weight 12,000), and that it consisted of four chains (two ending in glycine and two ending in phenylalanine), with the chains cross ...
Disperse Yellow 42, a popular dye for polyesters, is derived from 1,4-dichloro-2-nitrobenzene. [1] 1,4-Dichloro-2-nitrobenzene is an organic compound with the formula C 6 H 3 Cl 2 NO 2. One of several isomers of dichloronitrobenzene, it is a yellow solid that is insoluble in water. It is produced by nitration of 1,4-dichlorobenzene. It is a ...