The mixed tertiary amines are produced by the action of alkyl halides on the primary amines.
The secondary and tertiary amines do not give this reaction.
The purely aromatic amines result upon heating the primary amines with their hydrochlorides, and, in some cases, by heating a phenol with a primary amine and anhydrous zinc chloride.
With nitrous acid, the primary amines yield alcohols, the secondary amines yield nitrosamines and the tertiary amines do not react: R.
The primary amines are colourless liquids or crystalline solids, which are insoluble in water, but readily soluble in the common organic solvents.
Ammonia finds a wide application in organic chemistry as a synthetic reagent; it reacts with alkyl iodides to formamines (q.
Biochemical taxonomy of South American amphibians by means of skin aminesand polypeptides.
These substances are formed from the aromatic amines by treatment with nitrous acid at low temperatures.
When heated with water they yield carbon dioxide and symmetrical dialkyl ureas; with ammonia and amines they form alkyl ureas; and with acid anhydrides they yield tertiary amides.
When hydrolysed with caustic alkalis, they yield primaryamines (this reaction determines their constitution).
The hydrochlorides are soluble in absolute alcohol, while chloride of ammonium is insoluble; this property is taken advantage of for separating amines from ammonia.
None of the above amines are sufficiently active in properties to be poisonous in the small quantities they are likely to be produced in decomposing foods.
The amines are bases originating from ammonia and built on the same type.
Nitrogen in the triad condition in the aminesis far less poisonous than in the pentad condition.
From the primary amines are derived the diazo compounds (q.
Three types ofamines are possible and have been prepared: primary, R.
Wurtz discovered the aminesor substituted ammonias, previously predicted by Liebig; A.
The diazonium salts are also formed by the action of zinc-dust and acids on the nitrates of primary amines (R.
NHR, may be prepared by the action of the primary and secondary amines on the diazonium salts, or by the action of nitrous acid on the free primary amine.
NO2, substances which he had previously prepared by similarly oxidizing the diazonium salts, by dehydrating the nitrates of primary amines with acetic anhydride, and by the action of nitric anhydride on the primary amines.
By the action of nitrous acid upon the salts of the primary organic amines the so-called diazo compounds are formed.
Amines of similar structure to these are occasionally found in living animal tissues.
Corresponding in structure and properties to these amines of animal origin, there is a series of basic substances, found in many plants, known as the plant amines.
Phenyl derivatives of simple amines are sometimes found in / \ plants.
There is no known physiological use for these simpleamines in plants.
As already explained in connection with salicylic acid, this base and its homologue tolidine form tetrazo-salts, which combine with phenols and amines or their sulpho-acids.
The product of photochemical decomposition no longer forms azo-colours with aminesor phenols.
Diazotised primuline, as already explained, combines in the usual way with amines and phenols to form azo-dyes.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "amines" in a variety of sentences. We hope that you will now be able to make sentences using this word.
