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Malononitrile is an organic compound nitrile with the formula CH 2 (CN) 2. It is a colorless or white solid, although aged samples appear yellow or even brown. It is a colorless or white solid, although aged samples appear yellow or even brown.
The cis-configuration of the amino groups was shown in 1928 through reaction with glyoxal to give 2,3-diaminopyrazine, and the full structure was shown in 1955 to be diaminomaleonitrile, as opposed to the isomeric aminoiminosuccinonitrile (AISN). [5] It can be prepared by cyanation of aminomalonitrile. [6] [7]
Like most azobenzenes, Solvent Yellow 7 can be synthesized by the reaction of the phenyldiazonium salt with phenol.The optimal pH value for this azo coupling is 8.5-10. The reaction is carried out in water, since sodium chloride (or potassium chloride) formed in the reaction is soluble in water, while the product precipitates.
One variant of the reaction involves iminodiacetonitrile or iminodiacetic acid (step 1'), which reacts in a weakly acidic medium (pH 6) with hydrogen cyanide and ethanal to form methylglycinonitrile-N,N-diacetic acid, the nitrile group of which is hydrolyzed with sodium hydroxide to trisodium N-(1-carboxylatoethyl)iminodiacetate (step 2'). The ...
Sodium maleonitriledithiolate is the chemical compound described by the formula Na 2 S 2 C 2 (CN) 2. The name refers to the cis compound, structurally related to maleonitrile ((CH(CN)) 2). Maleonitriledithiolate is often abbreviated mnt. It is a "dithiolene", i.e. a chelating alkene-1,2-dithiolate.
Reaction of the sodium cyanoacetate with ethyl bromide in an aqueous–organic two-phase system in the presence of a phase transfer catalyst. [ 4 ] Oxidation of 3-ethoxypropionitrile, an ether , with oxygen under pressure in the presence of cobalt(II) acetate tetrahydrate as catalyst and N -hydroxyphthalimide as a radical generator.
Diethyl malonate is produced from the reaction of the sodium salt of chloroacetic acid with sodium cyanide, which produces the nitrile. This intermediate is then treated with ethanol in the presence of acid catalyst: ClCH 2 CO 2 Na + NaCN → NCCH 2 CO 2 Na + NaCl NCCH 2 CO 2 Na + 2 C 2 H 5 OH + 2 HCl → C 2 H 5 O 2 CCH 2 CO 2 C 2 H 5 + NH 4 ...
The first step is the preparation of a benzene diazonium chloride solution, a diazonium salt created from the reaction of aniline with mixed nitric acid and hydrochloric acid. The second step involves adding the solution of the diazonium salt to 2-naphthol, to produce the diazo dye. Sudan I is prone to photodegradation when exposed to light.