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  2. Nitrous acid - Wikipedia

    en.wikipedia.org/wiki/Nitrous_acid

    Nitrous acid (molecular formula H N O 2) is a weak and monoprotic acid known only in solution, in the gas phase, and in the form of nitrite (NO − 2) salts. [3] It was discovered by Carl Wilhelm Scheele, who called it "phlogisticated acid of niter". Nitrous acid is used to make diazonium salts from amines.

  3. Amine - Wikipedia

    en.wikipedia.org/wiki/Amine

    Amine. In chemistry, amines (/ ə ˈ m iː n, ˈ æ m iː n /, [1] [2] UK also / ˈ eɪ m iː n / [3]) are compounds and functional groups that contain a basic nitrogen atom with a lone pair.Formally, amines are derivatives of ammonia (NH 3 (in which the bond angle between the nitrogen and hydrogen is 107°), wherein one or more hydrogen atoms have been replaced by a substituent such as an ...

  4. N-(1-Naphthyl)ethylenediamine - Wikipedia

    en.wikipedia.org/wiki/N-(1-Naphthyl)ethylenediamine

    Sample containing nitrite ions is first neutralized and then treated with dilute hydrochloric acid at 0 - 5 °C to give nitrous acid. Then an excess but fixed volume of sulfanilamide and N-(1-naphthyl)ethylenediamine dihydrochloride solution is added.

  5. Ethylamine - Wikipedia

    en.wikipedia.org/wiki/Ethylamine

    Ethylamine, also known as ethanamine, is an organic compound with the formula CH 3 CH 2 NH 2. This colourless gas has a strong ammonia-like odor. It condenses just below room temperature to a liquid miscible with virtually all solvents. It is a nucleophilic base, as is typical for amines. Ethylamine is widely used in chemical industry and ...

  6. Ethylammonium nitrate - Wikipedia

    en.wikipedia.org/wiki/Ethylammonium_nitrate

    Ethylammonium nitrate or ethylamine nitrate [3] (EAN) is a salt with formula [CH 3 CH 2 NH 3] + [NO 3] −. It is an odorless and colorless to slightly yellowish liquid with a melting point of 12 °C. [4] This compound was described by Paul Walden in 1914, [5] [6] and is believed to be the earliest reported example of a room-temperature ionic ...

  7. Ethylenediamine - Wikipedia

    en.wikipedia.org/wiki/Ethylenediamine

    Ethylenediamine (abbreviated as en when a ligand) is the organic compound with the formula C 2 H 4 (NH 2) 2.This colorless liquid with an ammonia-like odor is a basic amine.It is a widely used building block in chemical synthesis, with approximately 500,000 tonnes produced in 1998. [6]

  8. Mannich reaction - Wikipedia

    en.wikipedia.org/wiki/Mannich_reaction

    The Schiff base is an electrophile which reacts in a second step in an electrophilic addition with an enol formed from a carbonyl compound containing an acidic alpha-proton. The Mannich reaction is a condensation reaction. [4]: 140 In the Mannich reaction, primary or secondary amines or ammonia react with formaldehyde to form a Schiff base ...

  9. Nitrosation and nitrosylation - Wikipedia

    en.wikipedia.org/wiki/Nitrosation_and_nitrosylation

    Nitrosation is typically performed with nitrous acid, formed from acidification of a sodium nitrite solution. Nitrous acid is unstable, and high yields require a rapid reaction rate. NO + synthon transfer is catalyzed by a strong nucleophile, such as (in order of increasing efficacy) chloride, bromide, thiocyanate, or thiourea.